wcslib (8.2.2)
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<a href="wcshdr_8h.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a id="l00001" name="l00001"></a><span class="lineno"> 1</span><span class="comment">/*============================================================================</span></div>
<div class="line"><a id="l00002" name="l00002"></a><span class="lineno"> 2</span><span class="comment"> WCSLIB 8.2 - an implementation of the FITS WCS standard.</span></div>
<div class="line"><a id="l00003" name="l00003"></a><span class="lineno"> 3</span><span class="comment"> Copyright (C) 1995-2023, Mark Calabretta</span></div>
<div class="line"><a id="l00004" name="l00004"></a><span class="lineno"> 4</span><span class="comment"></span> </div>
<div class="line"><a id="l00005" name="l00005"></a><span class="lineno"> 5</span><span class="comment"> This file is part of WCSLIB.</span></div>
<div class="line"><a id="l00006" name="l00006"></a><span class="lineno"> 6</span><span class="comment"></span> </div>
<div class="line"><a id="l00007" name="l00007"></a><span class="lineno"> 7</span><span class="comment"> WCSLIB is free software: you can redistribute it and/or modify it under the</span></div>
<div class="line"><a id="l00008" name="l00008"></a><span class="lineno"> 8</span><span class="comment"> terms of the GNU Lesser General Public License as published by the Free</span></div>
<div class="line"><a id="l00009" name="l00009"></a><span class="lineno"> 9</span><span class="comment"> Software Foundation, either version 3 of the License, or (at your option)</span></div>
<div class="line"><a id="l00010" name="l00010"></a><span class="lineno"> 10</span><span class="comment"> any later version.</span></div>
<div class="line"><a id="l00011" name="l00011"></a><span class="lineno"> 11</span><span class="comment"></span> </div>
<div class="line"><a id="l00012" name="l00012"></a><span class="lineno"> 12</span><span class="comment"> WCSLIB is distributed in the hope that it will be useful, but WITHOUT ANY</span></div>
<div class="line"><a id="l00013" name="l00013"></a><span class="lineno"> 13</span><span class="comment"> WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS</span></div>
<div class="line"><a id="l00014" name="l00014"></a><span class="lineno"> 14</span><span class="comment"> FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for</span></div>
<div class="line"><a id="l00015" name="l00015"></a><span class="lineno"> 15</span><span class="comment"> more details.</span></div>
<div class="line"><a id="l00016" name="l00016"></a><span class="lineno"> 16</span><span class="comment"></span> </div>
<div class="line"><a id="l00017" name="l00017"></a><span class="lineno"> 17</span><span class="comment"> You should have received a copy of the GNU Lesser General Public License</span></div>
<div class="line"><a id="l00018" name="l00018"></a><span class="lineno"> 18</span><span class="comment"> along with WCSLIB. If not, see http://www.gnu.org/licenses.</span></div>
<div class="line"><a id="l00019" name="l00019"></a><span class="lineno"> 19</span><span class="comment"></span> </div>
<div class="line"><a id="l00020" name="l00020"></a><span class="lineno"> 20</span><span class="comment"> Author: Mark Calabretta, Australia Telescope National Facility, CSIRO.</span></div>
<div class="line"><a id="l00021" name="l00021"></a><span class="lineno"> 21</span><span class="comment"> http://www.atnf.csiro.au/people/Mark.Calabretta</span></div>
<div class="line"><a id="l00022" name="l00022"></a><span class="lineno"> 22</span><span class="comment"> $Id: wcshdr.h,v 8.2.1.1 2023/11/16 10:05:57 mcalabre Exp mcalabre $</span></div>
<div class="line"><a id="l00023" name="l00023"></a><span class="lineno"> 23</span><span class="comment">*=============================================================================</span></div>
<div class="line"><a id="l00024" name="l00024"></a><span class="lineno"> 24</span><span class="comment">*</span></div>
<div class="line"><a id="l00025" name="l00025"></a><span class="lineno"> 25</span><span class="comment">* WCSLIB 8.2 - C routines that implement the FITS World Coordinate System</span></div>
<div class="line"><a id="l00026" name="l00026"></a><span class="lineno"> 26</span><span class="comment">* (WCS) standard. Refer to the README file provided with WCSLIB for an</span></div>
<div class="line"><a id="l00027" name="l00027"></a><span class="lineno"> 27</span><span class="comment">* overview of the library.</span></div>
<div class="line"><a id="l00028" name="l00028"></a><span class="lineno"> 28</span><span class="comment">*</span></div>
<div class="line"><a id="l00029" name="l00029"></a><span class="lineno"> 29</span><span class="comment">*</span></div>
<div class="line"><a id="l00030" name="l00030"></a><span class="lineno"> 30</span><span class="comment">* Summary of the wcshdr routines</span></div>
<div class="line"><a id="l00031" name="l00031"></a><span class="lineno"> 31</span><span class="comment">* ------------------------------</span></div>
<div class="line"><a id="l00032" name="l00032"></a><span class="lineno"> 32</span><span class="comment">* Routines in this suite are aimed at extracting WCS information from a FITS</span></div>
<div class="line"><a id="l00033" name="l00033"></a><span class="lineno"> 33</span><span class="comment">* file. The information is encoded via keywords defined in</span></div>
<div class="line"><a id="l00034" name="l00034"></a><span class="lineno"> 34</span><span class="comment">*</span></div>
<div class="line"><a id="l00035" name="l00035"></a><span class="lineno"> 35</span><span class="comment">= "Representations of world coordinates in FITS",</span></div>
<div class="line"><a id="l00036" name="l00036"></a><span class="lineno"> 36</span><span class="comment">= Greisen, E.W., & Calabretta, M.R. 2002, A&A, 395, 1061 (WCS Paper I)</span></div>
<div class="line"><a id="l00037" name="l00037"></a><span class="lineno"> 37</span><span class="comment">=</span></div>
<div class="line"><a id="l00038" name="l00038"></a><span class="lineno"> 38</span><span class="comment">= "Representations of celestial coordinates in FITS",</span></div>
<div class="line"><a id="l00039" name="l00039"></a><span class="lineno"> 39</span><span class="comment">= Calabretta, M.R., & Greisen, E.W. 2002, A&A, 395, 1077 (WCS Paper II)</span></div>
<div class="line"><a id="l00040" name="l00040"></a><span class="lineno"> 40</span><span class="comment">=</span></div>
<div class="line"><a id="l00041" name="l00041"></a><span class="lineno"> 41</span><span class="comment">= "Representations of spectral coordinates in FITS",</span></div>
<div class="line"><a id="l00042" name="l00042"></a><span class="lineno"> 42</span><span class="comment">= Greisen, E.W., Calabretta, M.R., Valdes, F.G., & Allen, S.L.</span></div>
<div class="line"><a id="l00043" name="l00043"></a><span class="lineno"> 43</span><span class="comment">= 2006, A&A, 446, 747 (WCS Paper III)</span></div>
<div class="line"><a id="l00044" name="l00044"></a><span class="lineno"> 44</span><span class="comment">=</span></div>
<div class="line"><a id="l00045" name="l00045"></a><span class="lineno"> 45</span><span class="comment">= "Representations of distortions in FITS world coordinate systems",</span></div>
<div class="line"><a id="l00046" name="l00046"></a><span class="lineno"> 46</span><span class="comment">= Calabretta, M.R. et al. (WCS Paper IV, draft dated 2004/04/22),</span></div>
<div class="line"><a id="l00047" name="l00047"></a><span class="lineno"> 47</span><span class="comment">= available from http://www.atnf.csiro.au/people/Mark.Calabretta</span></div>
<div class="line"><a id="l00048" name="l00048"></a><span class="lineno"> 48</span><span class="comment">=</span></div>
<div class="line"><a id="l00049" name="l00049"></a><span class="lineno"> 49</span><span class="comment">= "Representations of time coordinates in FITS -</span></div>
<div class="line"><a id="l00050" name="l00050"></a><span class="lineno"> 50</span><span class="comment">= Time and relative dimension in space",</span></div>
<div class="line"><a id="l00051" name="l00051"></a><span class="lineno"> 51</span><span class="comment">= Rots, A.H., Bunclark, P.S., Calabretta, M.R., Allen, S.L.,</span></div>
<div class="line"><a id="l00052" name="l00052"></a><span class="lineno"> 52</span><span class="comment">= Manchester, R.N., & Thompson, W.T. 2015, A&A, 574, A36 (WCS Paper VII)</span></div>
<div class="line"><a id="l00053" name="l00053"></a><span class="lineno"> 53</span><span class="comment">*</span></div>
<div class="line"><a id="l00054" name="l00054"></a><span class="lineno"> 54</span><span class="comment">* These routines provide the high-level interface between the FITS file and</span></div>
<div class="line"><a id="l00055" name="l00055"></a><span class="lineno"> 55</span><span class="comment">* the WCS coordinate transformation routines.</span></div>
<div class="line"><a id="l00056" name="l00056"></a><span class="lineno"> 56</span><span class="comment">*</span></div>
<div class="line"><a id="l00057" name="l00057"></a><span class="lineno"> 57</span><span class="comment">* Additionally, function wcshdo() is provided to write out the contents of a</span></div>
<div class="line"><a id="l00058" name="l00058"></a><span class="lineno"> 58</span><span class="comment">* wcsprm struct as a FITS header.</span></div>
<div class="line"><a id="l00059" name="l00059"></a><span class="lineno"> 59</span><span class="comment">*</span></div>
<div class="line"><a id="l00060" name="l00060"></a><span class="lineno"> 60</span><span class="comment">* Briefly, the anticipated sequence of operations is as follows:</span></div>
<div class="line"><a id="l00061" name="l00061"></a><span class="lineno"> 61</span><span class="comment">*</span></div>
<div class="line"><a id="l00062" name="l00062"></a><span class="lineno"> 62</span><span class="comment">* - 1: Open the FITS file and read the image or binary table header, e.g.</span></div>
<div class="line"><a id="l00063" name="l00063"></a><span class="lineno"> 63</span><span class="comment">* using CFITSIO routine fits_hdr2str().</span></div>
<div class="line"><a id="l00064" name="l00064"></a><span class="lineno"> 64</span><span class="comment">*</span></div>
<div class="line"><a id="l00065" name="l00065"></a><span class="lineno"> 65</span><span class="comment">* - 2: Parse the header using wcspih() or wcsbth(); they will automatically</span></div>
<div class="line"><a id="l00066" name="l00066"></a><span class="lineno"> 66</span><span class="comment">* interpret 'TAB' header keywords using wcstab().</span></div>
<div class="line"><a id="l00067" name="l00067"></a><span class="lineno"> 67</span><span class="comment">*</span></div>
<div class="line"><a id="l00068" name="l00068"></a><span class="lineno"> 68</span><span class="comment">* - 3: Allocate memory for, and read 'TAB' arrays from the binary table</span></div>
<div class="line"><a id="l00069" name="l00069"></a><span class="lineno"> 69</span><span class="comment">* extension, e.g. using CFITSIO routine fits_read_wcstab() - refer to</span></div>
<div class="line"><a id="l00070" name="l00070"></a><span class="lineno"> 70</span><span class="comment">* the prologue of getwcstab.h. wcsset() will automatically take</span></div>
<div class="line"><a id="l00071" name="l00071"></a><span class="lineno"> 71</span><span class="comment">* control of this allocated memory, in particular causing it to be</span></div>
<div class="line"><a id="l00072" name="l00072"></a><span class="lineno"> 72</span><span class="comment">* freed by wcsfree().</span></div>
<div class="line"><a id="l00073" name="l00073"></a><span class="lineno"> 73</span><span class="comment">*</span></div>
<div class="line"><a id="l00074" name="l00074"></a><span class="lineno"> 74</span><span class="comment">* - 4: Translate non-standard WCS usage using wcsfix(), see wcsfix.h.</span></div>
<div class="line"><a id="l00075" name="l00075"></a><span class="lineno"> 75</span><span class="comment">*</span></div>
<div class="line"><a id="l00076" name="l00076"></a><span class="lineno"> 76</span><span class="comment">* - 5: Initialize wcsprm struct(s) using wcsset() and calculate coordinates</span></div>
<div class="line"><a id="l00077" name="l00077"></a><span class="lineno"> 77</span><span class="comment">* using wcsp2s() and/or wcss2p(). Refer to the prologue of wcs.h for a</span></div>
<div class="line"><a id="l00078" name="l00078"></a><span class="lineno"> 78</span><span class="comment">* description of these and other high-level WCS coordinate</span></div>
<div class="line"><a id="l00079" name="l00079"></a><span class="lineno"> 79</span><span class="comment">* transformation routines.</span></div>
<div class="line"><a id="l00080" name="l00080"></a><span class="lineno"> 80</span><span class="comment">*</span></div>
<div class="line"><a id="l00081" name="l00081"></a><span class="lineno"> 81</span><span class="comment">* - 6: Clean up by freeing memory with wcsvfree().</span></div>
<div class="line"><a id="l00082" name="l00082"></a><span class="lineno"> 82</span><span class="comment">*</span></div>
<div class="line"><a id="l00083" name="l00083"></a><span class="lineno"> 83</span><span class="comment">* In detail:</span></div>
<div class="line"><a id="l00084" name="l00084"></a><span class="lineno"> 84</span><span class="comment">*</span></div>
<div class="line"><a id="l00085" name="l00085"></a><span class="lineno"> 85</span><span class="comment">* - wcspih() is a high-level FITS WCS routine that parses an image header. It</span></div>
<div class="line"><a id="l00086" name="l00086"></a><span class="lineno"> 86</span><span class="comment">* returns an array of up to 27 wcsprm structs on each of which it invokes</span></div>
<div class="line"><a id="l00087" name="l00087"></a><span class="lineno"> 87</span><span class="comment">* wcstab().</span></div>
<div class="line"><a id="l00088" name="l00088"></a><span class="lineno"> 88</span><span class="comment">*</span></div>
<div class="line"><a id="l00089" name="l00089"></a><span class="lineno"> 89</span><span class="comment">* - wcsbth() is the analogue of wcspih() for use with binary tables; it</span></div>
<div class="line"><a id="l00090" name="l00090"></a><span class="lineno"> 90</span><span class="comment">* handles image array and pixel list keywords. As an extension of the FITS</span></div>
<div class="line"><a id="l00091" name="l00091"></a><span class="lineno"> 91</span><span class="comment">* WCS standard, it also recognizes image header keywords which may be used</span></div>
<div class="line"><a id="l00092" name="l00092"></a><span class="lineno"> 92</span><span class="comment">* to provide default values via an inheritance mechanism.</span></div>
<div class="line"><a id="l00093" name="l00093"></a><span class="lineno"> 93</span><span class="comment">*</span></div>
<div class="line"><a id="l00094" name="l00094"></a><span class="lineno"> 94</span><span class="comment">* - wcstab() assists in filling in members of the wcsprm struct associated</span></div>
<div class="line"><a id="l00095" name="l00095"></a><span class="lineno"> 95</span><span class="comment">* with coordinate lookup tables ('TAB'). These are based on arrays stored</span></div>
<div class="line"><a id="l00096" name="l00096"></a><span class="lineno"> 96</span><span class="comment">* in a FITS binary table extension (BINTABLE) that are located by PVi_ma</span></div>
<div class="line"><a id="l00097" name="l00097"></a><span class="lineno"> 97</span><span class="comment">* keywords in the image header.</span></div>
<div class="line"><a id="l00098" name="l00098"></a><span class="lineno"> 98</span><span class="comment">*</span></div>
<div class="line"><a id="l00099" name="l00099"></a><span class="lineno"> 99</span><span class="comment">* - wcsidx() and wcsbdx() are utility routines that return the index for a</span></div>
<div class="line"><a id="l00100" name="l00100"></a><span class="lineno"> 100</span><span class="comment">* specified alternate coordinate descriptor in the array of wcsprm structs</span></div>
<div class="line"><a id="l00101" name="l00101"></a><span class="lineno"> 101</span><span class="comment">* returned by wcspih() or wcsbth().</span></div>
<div class="line"><a id="l00102" name="l00102"></a><span class="lineno"> 102</span><span class="comment">*</span></div>
<div class="line"><a id="l00103" name="l00103"></a><span class="lineno"> 103</span><span class="comment">* - wcsvfree() deallocates memory for an array of wcsprm structs, such as</span></div>
<div class="line"><a id="l00104" name="l00104"></a><span class="lineno"> 104</span><span class="comment">* returned by wcspih() or wcsbth().</span></div>
<div class="line"><a id="l00105" name="l00105"></a><span class="lineno"> 105</span><span class="comment">*</span></div>
<div class="line"><a id="l00106" name="l00106"></a><span class="lineno"> 106</span><span class="comment">* - wcshdo() writes out a wcsprm struct as a FITS header.</span></div>
<div class="line"><a id="l00107" name="l00107"></a><span class="lineno"> 107</span><span class="comment">*</span></div>
<div class="line"><a id="l00108" name="l00108"></a><span class="lineno"> 108</span><span class="comment">*</span></div>
<div class="line"><a id="l00109" name="l00109"></a><span class="lineno"> 109</span><span class="comment">* wcspih() - FITS WCS parser routine for image headers</span></div>
<div class="line"><a id="l00110" name="l00110"></a><span class="lineno"> 110</span><span class="comment">* ----------------------------------------------------</span></div>
<div class="line"><a id="l00111" name="l00111"></a><span class="lineno"> 111</span><span class="comment">* wcspih() is a high-level FITS WCS routine that parses an image header,</span></div>
<div class="line"><a id="l00112" name="l00112"></a><span class="lineno"> 112</span><span class="comment">* either that of a primary HDU or of an image extension. All WCS keywords</span></div>
<div class="line"><a id="l00113" name="l00113"></a><span class="lineno"> 113</span><span class="comment">* defined in Papers I, II, III, IV, and VII are recognized, and also those</span></div>
<div class="line"><a id="l00114" name="l00114"></a><span class="lineno"> 114</span><span class="comment">* used by the AIPS convention and certain other keywords that existed in early</span></div>
<div class="line"><a id="l00115" name="l00115"></a><span class="lineno"> 115</span><span class="comment">* drafts of the WCS papers as explained in wcsbth() note 5. wcspih() also</span></div>
<div class="line"><a id="l00116" name="l00116"></a><span class="lineno"> 116</span><span class="comment">* handles keywords associated with non-standard distortion functions described</span></div>
<div class="line"><a id="l00117" name="l00117"></a><span class="lineno"> 117</span><span class="comment">* in the prologue of dis.h.</span></div>
<div class="line"><a id="l00118" name="l00118"></a><span class="lineno"> 118</span><span class="comment">*</span></div>
<div class="line"><a id="l00119" name="l00119"></a><span class="lineno"> 119</span><span class="comment">* Given a character array containing a FITS image header, wcspih() identifies</span></div>
<div class="line"><a id="l00120" name="l00120"></a><span class="lineno"> 120</span><span class="comment">* and reads all WCS keywords for the primary coordinate representation and up</span></div>
<div class="line"><a id="l00121" name="l00121"></a><span class="lineno"> 121</span><span class="comment">* to 26 alternate representations. It returns this information as an array of</span></div>
<div class="line"><a id="l00122" name="l00122"></a><span class="lineno"> 122</span><span class="comment">* wcsprm structs.</span></div>
<div class="line"><a id="l00123" name="l00123"></a><span class="lineno"> 123</span><span class="comment">*</span></div>
<div class="line"><a id="l00124" name="l00124"></a><span class="lineno"> 124</span><span class="comment">* wcspih() invokes wcstab() on each of the wcsprm structs that it returns.</span></div>
<div class="line"><a id="l00125" name="l00125"></a><span class="lineno"> 125</span><span class="comment">*</span></div>
<div class="line"><a id="l00126" name="l00126"></a><span class="lineno"> 126</span><span class="comment">* Use wcsbth() in preference to wcspih() for FITS headers of unknown type;</span></div>
<div class="line"><a id="l00127" name="l00127"></a><span class="lineno"> 127</span><span class="comment">* wcsbth() can parse image headers as well as binary table and pixel list</span></div>
<div class="line"><a id="l00128" name="l00128"></a><span class="lineno"> 128</span><span class="comment">* headers, although it cannot handle keywords relating to distortion</span></div>
<div class="line"><a id="l00129" name="l00129"></a><span class="lineno"> 129</span><span class="comment">* functions, which may only exist in an image header (primary or extension).</span></div>
<div class="line"><a id="l00130" name="l00130"></a><span class="lineno"> 130</span><span class="comment">*</span></div>
<div class="line"><a id="l00131" name="l00131"></a><span class="lineno"> 131</span><span class="comment">* Given and returned:</span></div>
<div class="line"><a id="l00132" name="l00132"></a><span class="lineno"> 132</span><span class="comment">* header char[] Character array containing the (entire) FITS image</span></div>
<div class="line"><a id="l00133" name="l00133"></a><span class="lineno"> 133</span><span class="comment">* header from which to identify and construct the</span></div>
<div class="line"><a id="l00134" name="l00134"></a><span class="lineno"> 134</span><span class="comment">* coordinate representations, for example, as might be</span></div>
<div class="line"><a id="l00135" name="l00135"></a><span class="lineno"> 135</span><span class="comment">* obtained conveniently via the CFITSIO routine</span></div>
<div class="line"><a id="l00136" name="l00136"></a><span class="lineno"> 136</span><span class="comment">* fits_hdr2str().</span></div>
<div class="line"><a id="l00137" name="l00137"></a><span class="lineno"> 137</span><span class="comment">*</span></div>
<div class="line"><a id="l00138" name="l00138"></a><span class="lineno"> 138</span><span class="comment">* Each header "keyrecord" (formerly "card image")</span></div>
<div class="line"><a id="l00139" name="l00139"></a><span class="lineno"> 139</span><span class="comment">* consists of exactly 80 7-bit ASCII printing characters</span></div>
<div class="line"><a id="l00140" name="l00140"></a><span class="lineno"> 140</span><span class="comment">* in the range 0x20 to 0x7e (which excludes NUL, BS,</span></div>
<div class="line"><a id="l00141" name="l00141"></a><span class="lineno"> 141</span><span class="comment">* TAB, LF, FF and CR) especially noting that the</span></div>
<div class="line"><a id="l00142" name="l00142"></a><span class="lineno"> 142</span><span class="comment">* keyrecords are NOT null-terminated.</span></div>
<div class="line"><a id="l00143" name="l00143"></a><span class="lineno"> 143</span><span class="comment">*</span></div>
<div class="line"><a id="l00144" name="l00144"></a><span class="lineno"> 144</span><span class="comment">* For negative values of ctrl (see below), header[] is</span></div>
<div class="line"><a id="l00145" name="l00145"></a><span class="lineno"> 145</span><span class="comment">* modified so that WCS keyrecords processed by wcspih()</span></div>
<div class="line"><a id="l00146" name="l00146"></a><span class="lineno"> 146</span><span class="comment">* are removed from it.</span></div>
<div class="line"><a id="l00147" name="l00147"></a><span class="lineno"> 147</span><span class="comment">*</span></div>
<div class="line"><a id="l00148" name="l00148"></a><span class="lineno"> 148</span><span class="comment">* Given:</span></div>
<div class="line"><a id="l00149" name="l00149"></a><span class="lineno"> 149</span><span class="comment">* nkeyrec int Number of keyrecords in header[].</span></div>
<div class="line"><a id="l00150" name="l00150"></a><span class="lineno"> 150</span><span class="comment">*</span></div>
<div class="line"><a id="l00151" name="l00151"></a><span class="lineno"> 151</span><span class="comment">* relax int Degree of permissiveness:</span></div>
<div class="line"><a id="l00152" name="l00152"></a><span class="lineno"> 152</span><span class="comment">* 0: Recognize only FITS keywords defined by the</span></div>
<div class="line"><a id="l00153" name="l00153"></a><span class="lineno"> 153</span><span class="comment">* published WCS standard.</span></div>
<div class="line"><a id="l00154" name="l00154"></a><span class="lineno"> 154</span><span class="comment">* WCSHDR_all: Admit all recognized informal</span></div>
<div class="line"><a id="l00155" name="l00155"></a><span class="lineno"> 155</span><span class="comment">* extensions of the WCS standard.</span></div>
<div class="line"><a id="l00156" name="l00156"></a><span class="lineno"> 156</span><span class="comment">* Fine-grained control of the degree of permissiveness</span></div>
<div class="line"><a id="l00157" name="l00157"></a><span class="lineno"> 157</span><span class="comment">* is also possible as explained in wcsbth() note 5.</span></div>
<div class="line"><a id="l00158" name="l00158"></a><span class="lineno"> 158</span><span class="comment">*</span></div>
<div class="line"><a id="l00159" name="l00159"></a><span class="lineno"> 159</span><span class="comment">* ctrl int Error reporting and other control options for invalid</span></div>
<div class="line"><a id="l00160" name="l00160"></a><span class="lineno"> 160</span><span class="comment">* WCS and other header keyrecords:</span></div>
<div class="line"><a id="l00161" name="l00161"></a><span class="lineno"> 161</span><span class="comment">* 0: Do not report any rejected header keyrecords.</span></div>
<div class="line"><a id="l00162" name="l00162"></a><span class="lineno"> 162</span><span class="comment">* 1: Produce a one-line message stating the number</span></div>
<div class="line"><a id="l00163" name="l00163"></a><span class="lineno"> 163</span><span class="comment">* of WCS keyrecords rejected (nreject).</span></div>
<div class="line"><a id="l00164" name="l00164"></a><span class="lineno"> 164</span><span class="comment">* 2: Report each rejected keyrecord and the reason</span></div>
<div class="line"><a id="l00165" name="l00165"></a><span class="lineno"> 165</span><span class="comment">* why it was rejected.</span></div>
<div class="line"><a id="l00166" name="l00166"></a><span class="lineno"> 166</span><span class="comment">* 3: As above, but also report all non-WCS</span></div>
<div class="line"><a id="l00167" name="l00167"></a><span class="lineno"> 167</span><span class="comment">* keyrecords that were discarded, and the number</span></div>
<div class="line"><a id="l00168" name="l00168"></a><span class="lineno"> 168</span><span class="comment">* of coordinate representations (nwcs) found.</span></div>
<div class="line"><a id="l00169" name="l00169"></a><span class="lineno"> 169</span><span class="comment">* 4: As above, but also report the accepted WCS</span></div>
<div class="line"><a id="l00170" name="l00170"></a><span class="lineno"> 170</span><span class="comment">* keyrecords, with a summary of the number</span></div>
<div class="line"><a id="l00171" name="l00171"></a><span class="lineno"> 171</span><span class="comment">* accepted as well as rejected.</span></div>
<div class="line"><a id="l00172" name="l00172"></a><span class="lineno"> 172</span><span class="comment">* The report is written to stderr by default, or the</span></div>
<div class="line"><a id="l00173" name="l00173"></a><span class="lineno"> 173</span><span class="comment">* stream set by wcsprintf_set().</span></div>
<div class="line"><a id="l00174" name="l00174"></a><span class="lineno"> 174</span><span class="comment">*</span></div>
<div class="line"><a id="l00175" name="l00175"></a><span class="lineno"> 175</span><span class="comment">* For ctrl < 0, WCS keyrecords processed by wcspih()</span></div>
<div class="line"><a id="l00176" name="l00176"></a><span class="lineno"> 176</span><span class="comment">* are removed from header[]:</span></div>
<div class="line"><a id="l00177" name="l00177"></a><span class="lineno"> 177</span><span class="comment">* -1: Remove only valid WCS keyrecords whose values</span></div>
<div class="line"><a id="l00178" name="l00178"></a><span class="lineno"> 178</span><span class="comment">* were successfully extracted, nothing is</span></div>
<div class="line"><a id="l00179" name="l00179"></a><span class="lineno"> 179</span><span class="comment">* reported.</span></div>
<div class="line"><a id="l00180" name="l00180"></a><span class="lineno"> 180</span><span class="comment">* -2: As above, but also remove WCS keyrecords that</span></div>
<div class="line"><a id="l00181" name="l00181"></a><span class="lineno"> 181</span><span class="comment">* were rejected, reporting each one and the</span></div>
<div class="line"><a id="l00182" name="l00182"></a><span class="lineno"> 182</span><span class="comment">* reason that it was rejected.</span></div>
<div class="line"><a id="l00183" name="l00183"></a><span class="lineno"> 183</span><span class="comment">* -3: As above, and also report the number of</span></div>
<div class="line"><a id="l00184" name="l00184"></a><span class="lineno"> 184</span><span class="comment">* coordinate representations (nwcs) found.</span></div>
<div class="line"><a id="l00185" name="l00185"></a><span class="lineno"> 185</span><span class="comment">* -11: Same as -1 but preserving global WCS-related</span></div>
<div class="line"><a id="l00186" name="l00186"></a><span class="lineno"> 186</span><span class="comment">* keywords such as '{DATE,MJD}-{OBS,BEG,AVG,END}'</span></div>
<div class="line"><a id="l00187" name="l00187"></a><span class="lineno"> 187</span><span class="comment">* and the other basic time-related keywords, and</span></div>
<div class="line"><a id="l00188" name="l00188"></a><span class="lineno"> 188</span><span class="comment">* 'OBSGEO-{X,Y,Z,L,B,H}'.</span></div>
<div class="line"><a id="l00189" name="l00189"></a><span class="lineno"> 189</span><span class="comment">* If any keyrecords are removed from header[] it will</span></div>
<div class="line"><a id="l00190" name="l00190"></a><span class="lineno"> 190</span><span class="comment">* be null-terminated (NUL not being a legal FITS header</span></div>
<div class="line"><a id="l00191" name="l00191"></a><span class="lineno"> 191</span><span class="comment">* character), otherwise it will contain its original</span></div>
<div class="line"><a id="l00192" name="l00192"></a><span class="lineno"> 192</span><span class="comment">* complement of nkeyrec keyrecords and possibly not be</span></div>
<div class="line"><a id="l00193" name="l00193"></a><span class="lineno"> 193</span><span class="comment">* null-terminated.</span></div>
<div class="line"><a id="l00194" name="l00194"></a><span class="lineno"> 194</span><span class="comment">*</span></div>
<div class="line"><a id="l00195" name="l00195"></a><span class="lineno"> 195</span><span class="comment">* Returned:</span></div>
<div class="line"><a id="l00196" name="l00196"></a><span class="lineno"> 196</span><span class="comment">* nreject int* Number of WCS keywords rejected for syntax errors,</span></div>
<div class="line"><a id="l00197" name="l00197"></a><span class="lineno"> 197</span><span class="comment">* illegal values, etc. Keywords not recognized as WCS</span></div>
<div class="line"><a id="l00198" name="l00198"></a><span class="lineno"> 198</span><span class="comment">* keywords are simply ignored. Refer also to wcsbth()</span></div>
<div class="line"><a id="l00199" name="l00199"></a><span class="lineno"> 199</span><span class="comment">* note 5.</span></div>
<div class="line"><a id="l00200" name="l00200"></a><span class="lineno"> 200</span><span class="comment">*</span></div>
<div class="line"><a id="l00201" name="l00201"></a><span class="lineno"> 201</span><span class="comment">* nwcs int* Number of coordinate representations found.</span></div>
<div class="line"><a id="l00202" name="l00202"></a><span class="lineno"> 202</span><span class="comment">*</span></div>
<div class="line"><a id="l00203" name="l00203"></a><span class="lineno"> 203</span><span class="comment">* wcs struct wcsprm**</span></div>
<div class="line"><a id="l00204" name="l00204"></a><span class="lineno"> 204</span><span class="comment">* Pointer to an array of wcsprm structs containing up to</span></div>
<div class="line"><a id="l00205" name="l00205"></a><span class="lineno"> 205</span><span class="comment">* 27 coordinate representations.</span></div>
<div class="line"><a id="l00206" name="l00206"></a><span class="lineno"> 206</span><span class="comment">*</span></div>
<div class="line"><a id="l00207" name="l00207"></a><span class="lineno"> 207</span><span class="comment">* Memory for the array is allocated by wcspih() which</span></div>
<div class="line"><a id="l00208" name="l00208"></a><span class="lineno"> 208</span><span class="comment">* also invokes wcsini() for each struct to allocate</span></div>
<div class="line"><a id="l00209" name="l00209"></a><span class="lineno"> 209</span><span class="comment">* memory for internal arrays and initialize their</span></div>
<div class="line"><a id="l00210" name="l00210"></a><span class="lineno"> 210</span><span class="comment">* members to default values. Refer also to wcsbth()</span></div>
<div class="line"><a id="l00211" name="l00211"></a><span class="lineno"> 211</span><span class="comment">* note 8. Note that wcsset() is not invoked on these</span></div>
<div class="line"><a id="l00212" name="l00212"></a><span class="lineno"> 212</span><span class="comment">* structs.</span></div>
<div class="line"><a id="l00213" name="l00213"></a><span class="lineno"> 213</span><span class="comment">*</span></div>
<div class="line"><a id="l00214" name="l00214"></a><span class="lineno"> 214</span><span class="comment">* This allocated memory must be freed by the user, first</span></div>
<div class="line"><a id="l00215" name="l00215"></a><span class="lineno"> 215</span><span class="comment">* by invoking wcsfree() for each struct, and then by</span></div>
<div class="line"><a id="l00216" name="l00216"></a><span class="lineno"> 216</span><span class="comment">* freeing the array itself. A routine, wcsvfree(), is</span></div>
<div class="line"><a id="l00217" name="l00217"></a><span class="lineno"> 217</span><span class="comment">* provided to do this (see below).</span></div>
<div class="line"><a id="l00218" name="l00218"></a><span class="lineno"> 218</span><span class="comment">*</span></div>
<div class="line"><a id="l00219" name="l00219"></a><span class="lineno"> 219</span><span class="comment">* Function return value:</span></div>
<div class="line"><a id="l00220" name="l00220"></a><span class="lineno"> 220</span><span class="comment">* int Status return value:</span></div>
<div class="line"><a id="l00221" name="l00221"></a><span class="lineno"> 221</span><span class="comment">* 0: Success.</span></div>
<div class="line"><a id="l00222" name="l00222"></a><span class="lineno"> 222</span><span class="comment">* 1: Null wcsprm pointer passed.</span></div>
<div class="line"><a id="l00223" name="l00223"></a><span class="lineno"> 223</span><span class="comment">* 2: Memory allocation failed.</span></div>
<div class="line"><a id="l00224" name="l00224"></a><span class="lineno"> 224</span><span class="comment">* 4: Fatal error returned by Flex parser.</span></div>
<div class="line"><a id="l00225" name="l00225"></a><span class="lineno"> 225</span><span class="comment">*</span></div>
<div class="line"><a id="l00226" name="l00226"></a><span class="lineno"> 226</span><span class="comment">* Notes:</span></div>
<div class="line"><a id="l00227" name="l00227"></a><span class="lineno"> 227</span><span class="comment">* 1: Refer to wcsbth() notes 1, 2, 3, 5, 7, and 8.</span></div>
<div class="line"><a id="l00228" name="l00228"></a><span class="lineno"> 228</span><span class="comment">*</span></div>
<div class="line"><a id="l00229" name="l00229"></a><span class="lineno"> 229</span><span class="comment">*</span></div>
<div class="line"><a id="l00230" name="l00230"></a><span class="lineno"> 230</span><span class="comment">* wcsbth() - FITS WCS parser routine for binary table and image headers</span></div>
<div class="line"><a id="l00231" name="l00231"></a><span class="lineno"> 231</span><span class="comment">* ---------------------------------------------------------------------</span></div>
<div class="line"><a id="l00232" name="l00232"></a><span class="lineno"> 232</span><span class="comment">* wcsbth() is a high-level FITS WCS routine that parses a binary table header.</span></div>
<div class="line"><a id="l00233" name="l00233"></a><span class="lineno"> 233</span><span class="comment">* It handles image array and pixel list WCS keywords which may be present</span></div>
<div class="line"><a id="l00234" name="l00234"></a><span class="lineno"> 234</span><span class="comment">* together in one header.</span></div>
<div class="line"><a id="l00235" name="l00235"></a><span class="lineno"> 235</span><span class="comment">*</span></div>
<div class="line"><a id="l00236" name="l00236"></a><span class="lineno"> 236</span><span class="comment">* As an extension of the FITS WCS standard, wcsbth() also recognizes image</span></div>
<div class="line"><a id="l00237" name="l00237"></a><span class="lineno"> 237</span><span class="comment">* header keywords in a binary table header. These may be used to provide</span></div>
<div class="line"><a id="l00238" name="l00238"></a><span class="lineno"> 238</span><span class="comment">* default values via an inheritance mechanism discussed in note 5 (c.f.</span></div>
<div class="line"><a id="l00239" name="l00239"></a><span class="lineno"> 239</span><span class="comment">* WCSHDR_AUXIMG and WCSHDR_ALLIMG), or may instead result in wcsprm structs</span></div>
<div class="line"><a id="l00240" name="l00240"></a><span class="lineno"> 240</span><span class="comment">* that are not associated with any particular column. Thus wcsbth() can</span></div>
<div class="line"><a id="l00241" name="l00241"></a><span class="lineno"> 241</span><span class="comment">* handle primary image and image extension headers in addition to binary table</span></div>
<div class="line"><a id="l00242" name="l00242"></a><span class="lineno"> 242</span><span class="comment">* headers (it ignores NAXIS and does not rely on the presence of the TFIELDS</span></div>
<div class="line"><a id="l00243" name="l00243"></a><span class="lineno"> 243</span><span class="comment">* keyword).</span></div>
<div class="line"><a id="l00244" name="l00244"></a><span class="lineno"> 244</span><span class="comment">*</span></div>
<div class="line"><a id="l00245" name="l00245"></a><span class="lineno"> 245</span><span class="comment">* All WCS keywords defined in Papers I, II, III, and VII are recognized, and</span></div>
<div class="line"><a id="l00246" name="l00246"></a><span class="lineno"> 246</span><span class="comment">* also those used by the AIPS convention and certain other keywords that</span></div>
<div class="line"><a id="l00247" name="l00247"></a><span class="lineno"> 247</span><span class="comment">* existed in early drafts of the WCS papers as explained in note 5 below.</span></div>
<div class="line"><a id="l00248" name="l00248"></a><span class="lineno"> 248</span><span class="comment">*</span></div>
<div class="line"><a id="l00249" name="l00249"></a><span class="lineno"> 249</span><span class="comment">* wcsbth() sets the colnum or colax[] members of the wcsprm structs that it</span></div>
<div class="line"><a id="l00250" name="l00250"></a><span class="lineno"> 250</span><span class="comment">* returns with the column number of an image array or the column numbers</span></div>
<div class="line"><a id="l00251" name="l00251"></a><span class="lineno"> 251</span><span class="comment">* associated with each pixel coordinate element in a pixel list. wcsprm</span></div>
<div class="line"><a id="l00252" name="l00252"></a><span class="lineno"> 252</span><span class="comment">* structs that are not associated with any particular column, as may be</span></div>
<div class="line"><a id="l00253" name="l00253"></a><span class="lineno"> 253</span><span class="comment">* derived from image header keywords, have colnum == 0.</span></div>
<div class="line"><a id="l00254" name="l00254"></a><span class="lineno"> 254</span><span class="comment">*</span></div>
<div class="line"><a id="l00255" name="l00255"></a><span class="lineno"> 255</span><span class="comment">* Note 6 below discusses the number of wcsprm structs returned by wcsbth(),</span></div>
<div class="line"><a id="l00256" name="l00256"></a><span class="lineno"> 256</span><span class="comment">* and the circumstances in which image header keywords cause a struct to be</span></div>
<div class="line"><a id="l00257" name="l00257"></a><span class="lineno"> 257</span><span class="comment">* created. See also note 9 concerning the number of separate images that may</span></div>
<div class="line"><a id="l00258" name="l00258"></a><span class="lineno"> 258</span><span class="comment">* be stored in a pixel list.</span></div>
<div class="line"><a id="l00259" name="l00259"></a><span class="lineno"> 259</span><span class="comment">*</span></div>
<div class="line"><a id="l00260" name="l00260"></a><span class="lineno"> 260</span><span class="comment">* The API to wcsbth() is similar to that of wcspih() except for the addition</span></div>
<div class="line"><a id="l00261" name="l00261"></a><span class="lineno"> 261</span><span class="comment">* of extra arguments that may be used to restrict its operation. Like</span></div>
<div class="line"><a id="l00262" name="l00262"></a><span class="lineno"> 262</span><span class="comment">* wcspih(), wcsbth() invokes wcstab() on each of the wcsprm structs that it</span></div>
<div class="line"><a id="l00263" name="l00263"></a><span class="lineno"> 263</span><span class="comment">* returns.</span></div>
<div class="line"><a id="l00264" name="l00264"></a><span class="lineno"> 264</span><span class="comment">*</span></div>
<div class="line"><a id="l00265" name="l00265"></a><span class="lineno"> 265</span><span class="comment">* Given and returned:</span></div>
<div class="line"><a id="l00266" name="l00266"></a><span class="lineno"> 266</span><span class="comment">* header char[] Character array containing the (entire) FITS binary</span></div>
<div class="line"><a id="l00267" name="l00267"></a><span class="lineno"> 267</span><span class="comment">* table, primary image, or image extension header from</span></div>
<div class="line"><a id="l00268" name="l00268"></a><span class="lineno"> 268</span><span class="comment">* which to identify and construct the coordinate</span></div>
<div class="line"><a id="l00269" name="l00269"></a><span class="lineno"> 269</span><span class="comment">* representations, for example, as might be obtained</span></div>
<div class="line"><a id="l00270" name="l00270"></a><span class="lineno"> 270</span><span class="comment">* conveniently via the CFITSIO routine fits_hdr2str().</span></div>
<div class="line"><a id="l00271" name="l00271"></a><span class="lineno"> 271</span><span class="comment">*</span></div>
<div class="line"><a id="l00272" name="l00272"></a><span class="lineno"> 272</span><span class="comment">* Each header "keyrecord" (formerly "card image")</span></div>
<div class="line"><a id="l00273" name="l00273"></a><span class="lineno"> 273</span><span class="comment">* consists of exactly 80 7-bit ASCII printing</span></div>
<div class="line"><a id="l00274" name="l00274"></a><span class="lineno"> 274</span><span class="comment">* characters in the range 0x20 to 0x7e (which excludes</span></div>
<div class="line"><a id="l00275" name="l00275"></a><span class="lineno"> 275</span><span class="comment">* NUL, BS, TAB, LF, FF and CR) especially noting that</span></div>
<div class="line"><a id="l00276" name="l00276"></a><span class="lineno"> 276</span><span class="comment">* the keyrecords are NOT null-terminated.</span></div>
<div class="line"><a id="l00277" name="l00277"></a><span class="lineno"> 277</span><span class="comment">*</span></div>
<div class="line"><a id="l00278" name="l00278"></a><span class="lineno"> 278</span><span class="comment">* For negative values of ctrl (see below), header[] is</span></div>
<div class="line"><a id="l00279" name="l00279"></a><span class="lineno"> 279</span><span class="comment">* modified so that WCS keyrecords processed by wcsbth()</span></div>
<div class="line"><a id="l00280" name="l00280"></a><span class="lineno"> 280</span><span class="comment">* are removed from it.</span></div>
<div class="line"><a id="l00281" name="l00281"></a><span class="lineno"> 281</span><span class="comment">*</span></div>
<div class="line"><a id="l00282" name="l00282"></a><span class="lineno"> 282</span><span class="comment">* Given:</span></div>
<div class="line"><a id="l00283" name="l00283"></a><span class="lineno"> 283</span><span class="comment">* nkeyrec int Number of keyrecords in header[].</span></div>
<div class="line"><a id="l00284" name="l00284"></a><span class="lineno"> 284</span><span class="comment">*</span></div>
<div class="line"><a id="l00285" name="l00285"></a><span class="lineno"> 285</span><span class="comment">* relax int Degree of permissiveness:</span></div>
<div class="line"><a id="l00286" name="l00286"></a><span class="lineno"> 286</span><span class="comment">* 0: Recognize only FITS keywords defined by the</span></div>
<div class="line"><a id="l00287" name="l00287"></a><span class="lineno"> 287</span><span class="comment">* published WCS standard.</span></div>
<div class="line"><a id="l00288" name="l00288"></a><span class="lineno"> 288</span><span class="comment">* WCSHDR_all: Admit all recognized informal</span></div>
<div class="line"><a id="l00289" name="l00289"></a><span class="lineno"> 289</span><span class="comment">* extensions of the WCS standard.</span></div>
<div class="line"><a id="l00290" name="l00290"></a><span class="lineno"> 290</span><span class="comment">* Fine-grained control of the degree of permissiveness</span></div>
<div class="line"><a id="l00291" name="l00291"></a><span class="lineno"> 291</span><span class="comment">* is also possible, as explained in note 5 below.</span></div>
<div class="line"><a id="l00292" name="l00292"></a><span class="lineno"> 292</span><span class="comment">*</span></div>
<div class="line"><a id="l00293" name="l00293"></a><span class="lineno"> 293</span><span class="comment">* ctrl int Error reporting and other control options for invalid</span></div>
<div class="line"><a id="l00294" name="l00294"></a><span class="lineno"> 294</span><span class="comment">* WCS and other header keyrecords:</span></div>
<div class="line"><a id="l00295" name="l00295"></a><span class="lineno"> 295</span><span class="comment">* 0: Do not report any rejected header keyrecords.</span></div>
<div class="line"><a id="l00296" name="l00296"></a><span class="lineno"> 296</span><span class="comment">* 1: Produce a one-line message stating the number</span></div>
<div class="line"><a id="l00297" name="l00297"></a><span class="lineno"> 297</span><span class="comment">* of WCS keyrecords rejected (nreject).</span></div>
<div class="line"><a id="l00298" name="l00298"></a><span class="lineno"> 298</span><span class="comment">* 2: Report each rejected keyrecord and the reason</span></div>
<div class="line"><a id="l00299" name="l00299"></a><span class="lineno"> 299</span><span class="comment">* why it was rejected.</span></div>
<div class="line"><a id="l00300" name="l00300"></a><span class="lineno"> 300</span><span class="comment">* 3: As above, but also report all non-WCS</span></div>
<div class="line"><a id="l00301" name="l00301"></a><span class="lineno"> 301</span><span class="comment">* keyrecords that were discarded, and the number</span></div>
<div class="line"><a id="l00302" name="l00302"></a><span class="lineno"> 302</span><span class="comment">* of coordinate representations (nwcs) found.</span></div>
<div class="line"><a id="l00303" name="l00303"></a><span class="lineno"> 303</span><span class="comment">* 4: As above, but also report the accepted WCS</span></div>
<div class="line"><a id="l00304" name="l00304"></a><span class="lineno"> 304</span><span class="comment">* keyrecords, with a summary of the number</span></div>
<div class="line"><a id="l00305" name="l00305"></a><span class="lineno"> 305</span><span class="comment">* accepted as well as rejected.</span></div>
<div class="line"><a id="l00306" name="l00306"></a><span class="lineno"> 306</span><span class="comment">* The report is written to stderr by default, or the</span></div>
<div class="line"><a id="l00307" name="l00307"></a><span class="lineno"> 307</span><span class="comment">* stream set by wcsprintf_set().</span></div>
<div class="line"><a id="l00308" name="l00308"></a><span class="lineno"> 308</span><span class="comment">*</span></div>
<div class="line"><a id="l00309" name="l00309"></a><span class="lineno"> 309</span><span class="comment">* For ctrl < 0, WCS keyrecords processed by wcsbth()</span></div>
<div class="line"><a id="l00310" name="l00310"></a><span class="lineno"> 310</span><span class="comment">* are removed from header[]:</span></div>
<div class="line"><a id="l00311" name="l00311"></a><span class="lineno"> 311</span><span class="comment">* -1: Remove only valid WCS keyrecords whose values</span></div>
<div class="line"><a id="l00312" name="l00312"></a><span class="lineno"> 312</span><span class="comment">* were successfully extracted, nothing is</span></div>
<div class="line"><a id="l00313" name="l00313"></a><span class="lineno"> 313</span><span class="comment">* reported.</span></div>
<div class="line"><a id="l00314" name="l00314"></a><span class="lineno"> 314</span><span class="comment">* -2: Also remove WCS keyrecords that were rejected,</span></div>
<div class="line"><a id="l00315" name="l00315"></a><span class="lineno"> 315</span><span class="comment">* reporting each one and the reason that it was</span></div>
<div class="line"><a id="l00316" name="l00316"></a><span class="lineno"> 316</span><span class="comment">* rejected.</span></div>
<div class="line"><a id="l00317" name="l00317"></a><span class="lineno"> 317</span><span class="comment">* -3: As above, and also report the number of</span></div>
<div class="line"><a id="l00318" name="l00318"></a><span class="lineno"> 318</span><span class="comment">* coordinate representations (nwcs) found.</span></div>
<div class="line"><a id="l00319" name="l00319"></a><span class="lineno"> 319</span><span class="comment">* -11: Same as -1 but preserving global WCS-related</span></div>
<div class="line"><a id="l00320" name="l00320"></a><span class="lineno"> 320</span><span class="comment">* keywords such as '{DATE,MJD}-{OBS,BEG,AVG,END}'</span></div>
<div class="line"><a id="l00321" name="l00321"></a><span class="lineno"> 321</span><span class="comment">* and the other basic time-related keywords, and</span></div>
<div class="line"><a id="l00322" name="l00322"></a><span class="lineno"> 322</span><span class="comment">* 'OBSGEO-{X,Y,Z,L,B,H}'.</span></div>
<div class="line"><a id="l00323" name="l00323"></a><span class="lineno"> 323</span><span class="comment">* If any keyrecords are removed from header[] it will</span></div>
<div class="line"><a id="l00324" name="l00324"></a><span class="lineno"> 324</span><span class="comment">* be null-terminated (NUL not being a legal FITS header</span></div>
<div class="line"><a id="l00325" name="l00325"></a><span class="lineno"> 325</span><span class="comment">* character), otherwise it will contain its original</span></div>
<div class="line"><a id="l00326" name="l00326"></a><span class="lineno"> 326</span><span class="comment">* complement of nkeyrec keyrecords and possibly not be</span></div>
<div class="line"><a id="l00327" name="l00327"></a><span class="lineno"> 327</span><span class="comment">* null-terminated.</span></div>
<div class="line"><a id="l00328" name="l00328"></a><span class="lineno"> 328</span><span class="comment">*</span></div>
<div class="line"><a id="l00329" name="l00329"></a><span class="lineno"> 329</span><span class="comment">* keysel int Vector of flag bits that may be used to restrict the</span></div>
<div class="line"><a id="l00330" name="l00330"></a><span class="lineno"> 330</span><span class="comment">* keyword types considered:</span></div>
<div class="line"><a id="l00331" name="l00331"></a><span class="lineno"> 331</span><span class="comment">* WCSHDR_IMGHEAD: Image header keywords.</span></div>
<div class="line"><a id="l00332" name="l00332"></a><span class="lineno"> 332</span><span class="comment">* WCSHDR_BIMGARR: Binary table image array.</span></div>
<div class="line"><a id="l00333" name="l00333"></a><span class="lineno"> 333</span><span class="comment">* WCSHDR_PIXLIST: Pixel list keywords.</span></div>
<div class="line"><a id="l00334" name="l00334"></a><span class="lineno"> 334</span><span class="comment">* If zero, there is no restriction.</span></div>
<div class="line"><a id="l00335" name="l00335"></a><span class="lineno"> 335</span><span class="comment">*</span></div>
<div class="line"><a id="l00336" name="l00336"></a><span class="lineno"> 336</span><span class="comment">* Keywords such as EQUIna or RFRQna that are common to</span></div>
<div class="line"><a id="l00337" name="l00337"></a><span class="lineno"> 337</span><span class="comment">* binary table image arrays and pixel lists (including</span></div>
<div class="line"><a id="l00338" name="l00338"></a><span class="lineno"> 338</span><span class="comment">* WCSNna and TWCSna, as explained in note 4 below) are</span></div>
<div class="line"><a id="l00339" name="l00339"></a><span class="lineno"> 339</span><span class="comment">* selected by both WCSHDR_BIMGARR and WCSHDR_PIXLIST.</span></div>
<div class="line"><a id="l00340" name="l00340"></a><span class="lineno"> 340</span><span class="comment">* Thus if inheritance via WCSHDR_ALLIMG is enabled as</span></div>
<div class="line"><a id="l00341" name="l00341"></a><span class="lineno"> 341</span><span class="comment">* discussed in note 5 and one of these shared keywords</span></div>
<div class="line"><a id="l00342" name="l00342"></a><span class="lineno"> 342</span><span class="comment">* is present, then WCSHDR_IMGHEAD and WCSHDR_PIXLIST</span></div>
<div class="line"><a id="l00343" name="l00343"></a><span class="lineno"> 343</span><span class="comment">* alone may be sufficient to cause the construction of</span></div>
<div class="line"><a id="l00344" name="l00344"></a><span class="lineno"> 344</span><span class="comment">* coordinate descriptions for binary table image arrays.</span></div>
<div class="line"><a id="l00345" name="l00345"></a><span class="lineno"> 345</span><span class="comment">*</span></div>
<div class="line"><a id="l00346" name="l00346"></a><span class="lineno"> 346</span><span class="comment">* colsel int* Pointer to an array of table column numbers used to</span></div>
<div class="line"><a id="l00347" name="l00347"></a><span class="lineno"> 347</span><span class="comment">* restrict the keywords considered by wcsbth().</span></div>
<div class="line"><a id="l00348" name="l00348"></a><span class="lineno"> 348</span><span class="comment">*</span></div>
<div class="line"><a id="l00349" name="l00349"></a><span class="lineno"> 349</span><span class="comment">* A null pointer may be specified to indicate that there</span></div>
<div class="line"><a id="l00350" name="l00350"></a><span class="lineno"> 350</span><span class="comment">* is no restriction. Otherwise, the magnitude of</span></div>
<div class="line"><a id="l00351" name="l00351"></a><span class="lineno"> 351</span><span class="comment">* cols[0] specifies the length of the array:</span></div>
<div class="line"><a id="l00352" name="l00352"></a><span class="lineno"> 352</span><span class="comment">* cols[0] > 0: the columns are included,</span></div>
<div class="line"><a id="l00353" name="l00353"></a><span class="lineno"> 353</span><span class="comment">* cols[0] < 0: the columns are excluded.</span></div>
<div class="line"><a id="l00354" name="l00354"></a><span class="lineno"> 354</span><span class="comment">*</span></div>
<div class="line"><a id="l00355" name="l00355"></a><span class="lineno"> 355</span><span class="comment">* For the pixel list keywords TPn_ka and TCn_ka (and</span></div>
<div class="line"><a id="l00356" name="l00356"></a><span class="lineno"> 356</span><span class="comment">* TPCn_ka and TCDn_ka if WCSHDR_LONGKEY is enabled), it</span></div>
<div class="line"><a id="l00357" name="l00357"></a><span class="lineno"> 357</span><span class="comment">* is an error for one column to be selected but not the</span></div>
<div class="line"><a id="l00358" name="l00358"></a><span class="lineno"> 358</span><span class="comment">* other. This is unlike the situation with invalid</span></div>
<div class="line"><a id="l00359" name="l00359"></a><span class="lineno"> 359</span><span class="comment">* keyrecords, which are simply rejected, because the</span></div>
<div class="line"><a id="l00360" name="l00360"></a><span class="lineno"> 360</span><span class="comment">* error is not intrinsic to the header itself but</span></div>
<div class="line"><a id="l00361" name="l00361"></a><span class="lineno"> 361</span><span class="comment">* arises in the way that it is processed.</span></div>
<div class="line"><a id="l00362" name="l00362"></a><span class="lineno"> 362</span><span class="comment">*</span></div>
<div class="line"><a id="l00363" name="l00363"></a><span class="lineno"> 363</span><span class="comment">* Returned:</span></div>
<div class="line"><a id="l00364" name="l00364"></a><span class="lineno"> 364</span><span class="comment">* nreject int* Number of WCS keywords rejected for syntax errors,</span></div>
<div class="line"><a id="l00365" name="l00365"></a><span class="lineno"> 365</span><span class="comment">* illegal values, etc. Keywords not recognized as WCS</span></div>
<div class="line"><a id="l00366" name="l00366"></a><span class="lineno"> 366</span><span class="comment">* keywords are simply ignored, refer also to note 5</span></div>
<div class="line"><a id="l00367" name="l00367"></a><span class="lineno"> 367</span><span class="comment">* below.</span></div>
<div class="line"><a id="l00368" name="l00368"></a><span class="lineno"> 368</span><span class="comment">*</span></div>
<div class="line"><a id="l00369" name="l00369"></a><span class="lineno"> 369</span><span class="comment">* nwcs int* Number of coordinate representations found.</span></div>
<div class="line"><a id="l00370" name="l00370"></a><span class="lineno"> 370</span><span class="comment">*</span></div>
<div class="line"><a id="l00371" name="l00371"></a><span class="lineno"> 371</span><span class="comment">* wcs struct wcsprm**</span></div>
<div class="line"><a id="l00372" name="l00372"></a><span class="lineno"> 372</span><span class="comment">* Pointer to an array of wcsprm structs containing up</span></div>
<div class="line"><a id="l00373" name="l00373"></a><span class="lineno"> 373</span><span class="comment">* to 27027 coordinate representations, refer to note 6</span></div>
<div class="line"><a id="l00374" name="l00374"></a><span class="lineno"> 374</span><span class="comment">* below.</span></div>
<div class="line"><a id="l00375" name="l00375"></a><span class="lineno"> 375</span><span class="comment">*</span></div>
<div class="line"><a id="l00376" name="l00376"></a><span class="lineno"> 376</span><span class="comment">* Memory for the array is allocated by wcsbth() which</span></div>
<div class="line"><a id="l00377" name="l00377"></a><span class="lineno"> 377</span><span class="comment">* also invokes wcsini() for each struct to allocate</span></div>
<div class="line"><a id="l00378" name="l00378"></a><span class="lineno"> 378</span><span class="comment">* memory for internal arrays and initialize their</span></div>
<div class="line"><a id="l00379" name="l00379"></a><span class="lineno"> 379</span><span class="comment">* members to default values. Refer also to note 8</span></div>
<div class="line"><a id="l00380" name="l00380"></a><span class="lineno"> 380</span><span class="comment">* below. Note that wcsset() is not invoked on these</span></div>
<div class="line"><a id="l00381" name="l00381"></a><span class="lineno"> 381</span><span class="comment">* structs.</span></div>
<div class="line"><a id="l00382" name="l00382"></a><span class="lineno"> 382</span><span class="comment">*</span></div>
<div class="line"><a id="l00383" name="l00383"></a><span class="lineno"> 383</span><span class="comment">* This allocated memory must be freed by the user, first</span></div>
<div class="line"><a id="l00384" name="l00384"></a><span class="lineno"> 384</span><span class="comment">* by invoking wcsfree() for each struct, and then by</span></div>
<div class="line"><a id="l00385" name="l00385"></a><span class="lineno"> 385</span><span class="comment">* freeing the array itself. A routine, wcsvfree(), is</span></div>
<div class="line"><a id="l00386" name="l00386"></a><span class="lineno"> 386</span><span class="comment">* provided to do this (see below).</span></div>
<div class="line"><a id="l00387" name="l00387"></a><span class="lineno"> 387</span><span class="comment">*</span></div>
<div class="line"><a id="l00388" name="l00388"></a><span class="lineno"> 388</span><span class="comment">* Function return value:</span></div>
<div class="line"><a id="l00389" name="l00389"></a><span class="lineno"> 389</span><span class="comment">* int Status return value:</span></div>
<div class="line"><a id="l00390" name="l00390"></a><span class="lineno"> 390</span><span class="comment">* 0: Success.</span></div>
<div class="line"><a id="l00391" name="l00391"></a><span class="lineno"> 391</span><span class="comment">* 1: Null wcsprm pointer passed.</span></div>
<div class="line"><a id="l00392" name="l00392"></a><span class="lineno"> 392</span><span class="comment">* 2: Memory allocation failed.</span></div>
<div class="line"><a id="l00393" name="l00393"></a><span class="lineno"> 393</span><span class="comment">* 3: Invalid column selection.</span></div>
<div class="line"><a id="l00394" name="l00394"></a><span class="lineno"> 394</span><span class="comment">* 4: Fatal error returned by Flex parser.</span></div>
<div class="line"><a id="l00395" name="l00395"></a><span class="lineno"> 395</span><span class="comment">*</span></div>
<div class="line"><a id="l00396" name="l00396"></a><span class="lineno"> 396</span><span class="comment">* Notes:</span></div>
<div class="line"><a id="l00397" name="l00397"></a><span class="lineno"> 397</span><span class="comment">* 1: wcspih() determines the number of coordinate axes independently for</span></div>
<div class="line"><a id="l00398" name="l00398"></a><span class="lineno"> 398</span><span class="comment">* each alternate coordinate representation (denoted by the "a" value in</span></div>
<div class="line"><a id="l00399" name="l00399"></a><span class="lineno"> 399</span><span class="comment">* keywords like CTYPEia) from the higher of</span></div>
<div class="line"><a id="l00400" name="l00400"></a><span class="lineno"> 400</span><span class="comment">*</span></div>
<div class="line"><a id="l00401" name="l00401"></a><span class="lineno"> 401</span><span class="comment">* a: NAXIS,</span></div>
<div class="line"><a id="l00402" name="l00402"></a><span class="lineno"> 402</span><span class="comment">* b: WCSAXESa,</span></div>
<div class="line"><a id="l00403" name="l00403"></a><span class="lineno"> 403</span><span class="comment">* c: The highest axis number in any parameterized WCS keyword. The</span></div>
<div class="line"><a id="l00404" name="l00404"></a><span class="lineno"> 404</span><span class="comment">* keyvalue, as well as the keyword, must be syntactically valid</span></div>
<div class="line"><a id="l00405" name="l00405"></a><span class="lineno"> 405</span><span class="comment">* otherwise it will not be considered.</span></div>
<div class="line"><a id="l00406" name="l00406"></a><span class="lineno"> 406</span><span class="comment">*</span></div>
<div class="line"><a id="l00407" name="l00407"></a><span class="lineno"> 407</span><span class="comment">* If none of these keyword types is present, i.e. if the header only</span></div>
<div class="line"><a id="l00408" name="l00408"></a><span class="lineno"> 408</span><span class="comment">* contains auxiliary WCS keywords for a particular coordinate</span></div>
<div class="line"><a id="l00409" name="l00409"></a><span class="lineno"> 409</span><span class="comment">* representation, then no coordinate description is constructed for it.</span></div>
<div class="line"><a id="l00410" name="l00410"></a><span class="lineno"> 410</span><span class="comment">*</span></div>
<div class="line"><a id="l00411" name="l00411"></a><span class="lineno"> 411</span><span class="comment">* wcsbth() is similar except that it ignores the NAXIS keyword if given</span></div>
<div class="line"><a id="l00412" name="l00412"></a><span class="lineno"> 412</span><span class="comment">* an image header to process.</span></div>
<div class="line"><a id="l00413" name="l00413"></a><span class="lineno"> 413</span><span class="comment">*</span></div>
<div class="line"><a id="l00414" name="l00414"></a><span class="lineno"> 414</span><span class="comment">* The number of axes, which is returned as a member of the wcsprm</span></div>
<div class="line"><a id="l00415" name="l00415"></a><span class="lineno"> 415</span><span class="comment">* struct, may differ for different coordinate representations of the</span></div>
<div class="line"><a id="l00416" name="l00416"></a><span class="lineno"> 416</span><span class="comment">* same image.</span></div>
<div class="line"><a id="l00417" name="l00417"></a><span class="lineno"> 417</span><span class="comment">*</span></div>
<div class="line"><a id="l00418" name="l00418"></a><span class="lineno"> 418</span><span class="comment">* 2: wcspih() and wcsbth() enforce correct FITS "keyword = value" syntax</span></div>
<div class="line"><a id="l00419" name="l00419"></a><span class="lineno"> 419</span><span class="comment">* with regard to "= " occurring in columns 9 and 10.</span></div>
<div class="line"><a id="l00420" name="l00420"></a><span class="lineno"> 420</span><span class="comment">*</span></div>
<div class="line"><a id="l00421" name="l00421"></a><span class="lineno"> 421</span><span class="comment">* However, they do recognize free-format character (NOST 100-2.0,</span></div>
<div class="line"><a id="l00422" name="l00422"></a><span class="lineno"> 422</span><span class="comment">* Sect. 5.2.1), integer (Sect. 5.2.3), and floating-point values</span></div>
<div class="line"><a id="l00423" name="l00423"></a><span class="lineno"> 423</span><span class="comment">* (Sect. 5.2.4) for all keywords.</span></div>
<div class="line"><a id="l00424" name="l00424"></a><span class="lineno"> 424</span><span class="comment">*</span></div>
<div class="line"><a id="l00425" name="l00425"></a><span class="lineno"> 425</span><span class="comment">* 3: Where CROTAn, CDi_ja, and PCi_ja occur together in one header wcspih()</span></div>
<div class="line"><a id="l00426" name="l00426"></a><span class="lineno"> 426</span><span class="comment">* and wcsbth() treat them as described in the prologue to wcs.h.</span></div>
<div class="line"><a id="l00427" name="l00427"></a><span class="lineno"> 427</span><span class="comment">*</span></div>
<div class="line"><a id="l00428" name="l00428"></a><span class="lineno"> 428</span><span class="comment">* 4: WCS Paper I mistakenly defined the pixel list form of WCSNAMEa as</span></div>
<div class="line"><a id="l00429" name="l00429"></a><span class="lineno"> 429</span><span class="comment">* TWCSna instead of WCSNna; the 'T' is meant to substitute for the axis</span></div>
<div class="line"><a id="l00430" name="l00430"></a><span class="lineno"> 430</span><span class="comment">* number in the binary table form of the keyword - note that keywords</span></div>
<div class="line"><a id="l00431" name="l00431"></a><span class="lineno"> 431</span><span class="comment">* defined in WCS Papers II, III, and VII that are not parameterized by</span></div>
<div class="line"><a id="l00432" name="l00432"></a><span class="lineno"> 432</span><span class="comment">* axis number have identical forms for binary tables and pixel lists.</span></div>
<div class="line"><a id="l00433" name="l00433"></a><span class="lineno"> 433</span><span class="comment">* Consequently wcsbth() always treats WCSNna and TWCSna as equivalent.</span></div>
<div class="line"><a id="l00434" name="l00434"></a><span class="lineno"> 434</span><span class="comment">*</span></div>
<div class="line"><a id="l00435" name="l00435"></a><span class="lineno"> 435</span><span class="comment">* 5: wcspih() and wcsbth() interpret the "relax" argument as a vector of</span></div>
<div class="line"><a id="l00436" name="l00436"></a><span class="lineno"> 436</span><span class="comment">* flag bits to provide fine-grained control over what non-standard WCS</span></div>
<div class="line"><a id="l00437" name="l00437"></a><span class="lineno"> 437</span><span class="comment">* keywords to accept. The flag bits are subject to change in future and</span></div>
<div class="line"><a id="l00438" name="l00438"></a><span class="lineno"> 438</span><span class="comment">* should be set by using the preprocessor macros (see below) for the</span></div>
<div class="line"><a id="l00439" name="l00439"></a><span class="lineno"> 439</span><span class="comment">* purpose.</span></div>
<div class="line"><a id="l00440" name="l00440"></a><span class="lineno"> 440</span><span class="comment">*</span></div>
<div class="line"><a id="l00441" name="l00441"></a><span class="lineno"> 441</span><span class="comment">* - WCSHDR_none: Don't accept any extensions (not even those in the</span></div>
<div class="line"><a id="l00442" name="l00442"></a><span class="lineno"> 442</span><span class="comment">* errata). Treat non-conformant keywords in the same way as</span></div>
<div class="line"><a id="l00443" name="l00443"></a><span class="lineno"> 443</span><span class="comment">* non-WCS keywords in the header, i.e. simply ignore them.</span></div>
<div class="line"><a id="l00444" name="l00444"></a><span class="lineno"> 444</span><span class="comment">*</span></div>
<div class="line"><a id="l00445" name="l00445"></a><span class="lineno"> 445</span><span class="comment">* - WCSHDR_all: Accept all extensions recognized by the parser.</span></div>
<div class="line"><a id="l00446" name="l00446"></a><span class="lineno"> 446</span><span class="comment">*</span></div>
<div class="line"><a id="l00447" name="l00447"></a><span class="lineno"> 447</span><span class="comment">* - WCSHDR_reject: Reject non-standard keyrecords (that are not otherwise</span></div>
<div class="line"><a id="l00448" name="l00448"></a><span class="lineno"> 448</span><span class="comment">* explicitly accepted by one of the flags below). A message will</span></div>
<div class="line"><a id="l00449" name="l00449"></a><span class="lineno"> 449</span><span class="comment">* optionally be printed on stderr by default, or the stream set</span></div>
<div class="line"><a id="l00450" name="l00450"></a><span class="lineno"> 450</span><span class="comment">* by wcsprintf_set(), as determined by the ctrl argument, and</span></div>
<div class="line"><a id="l00451" name="l00451"></a><span class="lineno"> 451</span><span class="comment">* nreject will be incremented.</span></div>
<div class="line"><a id="l00452" name="l00452"></a><span class="lineno"> 452</span><span class="comment">*</span></div>
<div class="line"><a id="l00453" name="l00453"></a><span class="lineno"> 453</span><span class="comment">* This flag may be used to signal the presence of non-standard</span></div>
<div class="line"><a id="l00454" name="l00454"></a><span class="lineno"> 454</span><span class="comment">* keywords, otherwise they are simply passed over as though they</span></div>
<div class="line"><a id="l00455" name="l00455"></a><span class="lineno"> 455</span><span class="comment">* did not exist in the header. It is mainly intended for testing</span></div>
<div class="line"><a id="l00456" name="l00456"></a><span class="lineno"> 456</span><span class="comment">* conformance of a FITS header to the WCS standard.</span></div>
<div class="line"><a id="l00457" name="l00457"></a><span class="lineno"> 457</span><span class="comment">*</span></div>
<div class="line"><a id="l00458" name="l00458"></a><span class="lineno"> 458</span><span class="comment">* Keyrecords may be non-standard in several ways:</span></div>
<div class="line"><a id="l00459" name="l00459"></a><span class="lineno"> 459</span><span class="comment">*</span></div>
<div class="line"><a id="l00460" name="l00460"></a><span class="lineno"> 460</span><span class="comment">* - The keyword may be syntactically valid but with keyvalue of</span></div>
<div class="line"><a id="l00461" name="l00461"></a><span class="lineno"> 461</span><span class="comment">* incorrect type or invalid syntax, or the keycomment may be</span></div>
<div class="line"><a id="l00462" name="l00462"></a><span class="lineno"> 462</span><span class="comment">* malformed.</span></div>
<div class="line"><a id="l00463" name="l00463"></a><span class="lineno"> 463</span><span class="comment">*</span></div>
<div class="line"><a id="l00464" name="l00464"></a><span class="lineno"> 464</span><span class="comment">* - The keyword may strongly resemble a WCS keyword but not, in</span></div>
<div class="line"><a id="l00465" name="l00465"></a><span class="lineno"> 465</span><span class="comment">* fact, be one because it does not conform to the standard.</span></div>
<div class="line"><a id="l00466" name="l00466"></a><span class="lineno"> 466</span><span class="comment">* For example, "CRPIX01" looks like a CRPIXja keyword, but in</span></div>
<div class="line"><a id="l00467" name="l00467"></a><span class="lineno"> 467</span><span class="comment">* fact the leading zero on the axis number violates the basic</span></div>
<div class="line"><a id="l00468" name="l00468"></a><span class="lineno"> 468</span><span class="comment">* FITS standard. Likewise, "LONPOLE2" is not a valid</span></div>
<div class="line"><a id="l00469" name="l00469"></a><span class="lineno"> 469</span><span class="comment">* LONPOLEa keyword in the WCS standard, and indeed there is</span></div>
<div class="line"><a id="l00470" name="l00470"></a><span class="lineno"> 470</span><span class="comment">* nothing the parser can sensibly do with it.</span></div>
<div class="line"><a id="l00471" name="l00471"></a><span class="lineno"> 471</span><span class="comment">*</span></div>
<div class="line"><a id="l00472" name="l00472"></a><span class="lineno"> 472</span><span class="comment">* - Use of the keyword may be deprecated by the standard. Such</span></div>
<div class="line"><a id="l00473" name="l00473"></a><span class="lineno"> 473</span><span class="comment">* will be rejected if not explicitly accepted via one of the</span></div>
<div class="line"><a id="l00474" name="l00474"></a><span class="lineno"> 474</span><span class="comment">* flags below.</span></div>
<div class="line"><a id="l00475" name="l00475"></a><span class="lineno"> 475</span><span class="comment">*</span></div>
<div class="line"><a id="l00476" name="l00476"></a><span class="lineno"> 476</span><span class="comment">* - WCSHDR_strict: As for WCSHDR_reject, but also reject AIPS-convention</span></div>
<div class="line"><a id="l00477" name="l00477"></a><span class="lineno"> 477</span><span class="comment">* keywords and all other deprecated usage that is not explicitly</span></div>
<div class="line"><a id="l00478" name="l00478"></a><span class="lineno"> 478</span><span class="comment">* accepted.</span></div>
<div class="line"><a id="l00479" name="l00479"></a><span class="lineno"> 479</span><span class="comment">*</span></div>
<div class="line"><a id="l00480" name="l00480"></a><span class="lineno"> 480</span><span class="comment">* - WCSHDR_CROTAia: Accept CROTAia (wcspih()),</span></div>
<div class="line"><a id="l00481" name="l00481"></a><span class="lineno"> 481</span><span class="comment">* iCROTna (wcsbth()),</span></div>
<div class="line"><a id="l00482" name="l00482"></a><span class="lineno"> 482</span><span class="comment">* TCROTna (wcsbth()).</span></div>
<div class="line"><a id="l00483" name="l00483"></a><span class="lineno"> 483</span><span class="comment">* - WCSHDR_VELREFa: Accept VELREFa.</span></div>
<div class="line"><a id="l00484" name="l00484"></a><span class="lineno"> 484</span><span class="comment">* wcspih() always recognizes the AIPS-convention keywords,</span></div>
<div class="line"><a id="l00485" name="l00485"></a><span class="lineno"> 485</span><span class="comment">* CROTAn, EPOCH, and VELREF for the primary representation</span></div>
<div class="line"><a id="l00486" name="l00486"></a><span class="lineno"> 486</span><span class="comment">* (a = ' ') but alternates are non-standard.</span></div>
<div class="line"><a id="l00487" name="l00487"></a><span class="lineno"> 487</span><span class="comment">*</span></div>
<div class="line"><a id="l00488" name="l00488"></a><span class="lineno"> 488</span><span class="comment">* wcsbth() accepts EPOCHa and VELREFa only if WCSHDR_AUXIMG is</span></div>
<div class="line"><a id="l00489" name="l00489"></a><span class="lineno"> 489</span><span class="comment">* also enabled.</span></div>
<div class="line"><a id="l00490" name="l00490"></a><span class="lineno"> 490</span><span class="comment">*</span></div>
<div class="line"><a id="l00491" name="l00491"></a><span class="lineno"> 491</span><span class="comment">* - WCSHDR_CD00i00j: Accept CD00i00j (wcspih()).</span></div>
<div class="line"><a id="l00492" name="l00492"></a><span class="lineno"> 492</span><span class="comment">* - WCSHDR_PC00i00j: Accept PC00i00j (wcspih()).</span></div>
<div class="line"><a id="l00493" name="l00493"></a><span class="lineno"> 493</span><span class="comment">* - WCSHDR_PROJPn: Accept PROJPn (wcspih()).</span></div>
<div class="line"><a id="l00494" name="l00494"></a><span class="lineno"> 494</span><span class="comment">* These appeared in early drafts of WCS Paper I+II (before they</span></div>
<div class="line"><a id="l00495" name="l00495"></a><span class="lineno"> 495</span><span class="comment">* were split) and are equivalent to CDi_ja, PCi_ja, and PVi_ma</span></div>
<div class="line"><a id="l00496" name="l00496"></a><span class="lineno"> 496</span><span class="comment">* for the primary representation (a = ' '). PROJPn is</span></div>
<div class="line"><a id="l00497" name="l00497"></a><span class="lineno"> 497</span><span class="comment">* equivalent to PVi_ma with m = n <= 9, and is associated</span></div>
<div class="line"><a id="l00498" name="l00498"></a><span class="lineno"> 498</span><span class="comment">* exclusively with the latitude axis.</span></div>
<div class="line"><a id="l00499" name="l00499"></a><span class="lineno"> 499</span><span class="comment">*</span></div>
<div class="line"><a id="l00500" name="l00500"></a><span class="lineno"> 500</span><span class="comment">* - WCSHDR_CD0i_0ja: Accept CD0i_0ja (wcspih()).</span></div>
<div class="line"><a id="l00501" name="l00501"></a><span class="lineno"> 501</span><span class="comment">* - WCSHDR_PC0i_0ja: Accept PC0i_0ja (wcspih()).</span></div>
<div class="line"><a id="l00502" name="l00502"></a><span class="lineno"> 502</span><span class="comment">* - WCSHDR_PV0i_0ma: Accept PV0i_0ja (wcspih()).</span></div>
<div class="line"><a id="l00503" name="l00503"></a><span class="lineno"> 503</span><span class="comment">* - WCSHDR_PS0i_0ma: Accept PS0i_0ja (wcspih()).</span></div>
<div class="line"><a id="l00504" name="l00504"></a><span class="lineno"> 504</span><span class="comment">* Allow the numerical index to have a leading zero in doubly-</span></div>
<div class="line"><a id="l00505" name="l00505"></a><span class="lineno"> 505</span><span class="comment">* parameterized keywords, for example, PC01_01. WCS Paper I</span></div>
<div class="line"><a id="l00506" name="l00506"></a><span class="lineno"> 506</span><span class="comment">* (Sects 2.1.2 & 2.1.4) explicitly disallows leading zeroes.</span></div>
<div class="line"><a id="l00507" name="l00507"></a><span class="lineno"> 507</span><span class="comment">* The FITS 3.0 standard document (Sect. 4.1.2.1) states that the</span></div>
<div class="line"><a id="l00508" name="l00508"></a><span class="lineno"> 508</span><span class="comment">* index in singly-parameterized keywords (e.g. CTYPEia) "shall</span></div>
<div class="line"><a id="l00509" name="l00509"></a><span class="lineno"> 509</span><span class="comment">* not have leading zeroes", and later in Sect. 8.1 that "leading</span></div>
<div class="line"><a id="l00510" name="l00510"></a><span class="lineno"> 510</span><span class="comment">* zeroes must not be used" on PVi_ma and PSi_ma. However, by an</span></div>
<div class="line"><a id="l00511" name="l00511"></a><span class="lineno"> 511</span><span class="comment">* oversight, it is silent on PCi_ja and CDi_ja.</span></div>
<div class="line"><a id="l00512" name="l00512"></a><span class="lineno"> 512</span><span class="comment">*</span></div>
<div class="line"><a id="l00513" name="l00513"></a><span class="lineno"> 513</span><span class="comment">* - WCSHDR_DOBSn (wcsbth() only): Allow DOBSn, the column-specific</span></div>
<div class="line"><a id="l00514" name="l00514"></a><span class="lineno"> 514</span><span class="comment">* analogue of DATE-OBS. By an oversight this was never formally</span></div>
<div class="line"><a id="l00515" name="l00515"></a><span class="lineno"> 515</span><span class="comment">* defined in the standard.</span></div>
<div class="line"><a id="l00516" name="l00516"></a><span class="lineno"> 516</span><span class="comment">*</span></div>
<div class="line"><a id="l00517" name="l00517"></a><span class="lineno"> 517</span><span class="comment">* - WCSHDR_OBSGLBHn (wcsbth() only): Allow OBSGLn, OBSGBn, and OBSGHn,</span></div>
<div class="line"><a id="l00518" name="l00518"></a><span class="lineno"> 518</span><span class="comment">* the column-specific analogues of OBSGEO-L, OBSGEO-B, and</span></div>
<div class="line"><a id="l00519" name="l00519"></a><span class="lineno"> 519</span><span class="comment">* OBSGEO-H. By an oversight these were never formally defined in</span></div>
<div class="line"><a id="l00520" name="l00520"></a><span class="lineno"> 520</span><span class="comment">* the standard.</span></div>
<div class="line"><a id="l00521" name="l00521"></a><span class="lineno"> 521</span><span class="comment">*</span></div>
<div class="line"><a id="l00522" name="l00522"></a><span class="lineno"> 522</span><span class="comment">* - WCSHDR_RADECSYS: Accept RADECSYS. This appeared in early drafts of</span></div>
<div class="line"><a id="l00523" name="l00523"></a><span class="lineno"> 523</span><span class="comment">* WCS Paper I+II and was subsequently replaced by RADESYSa.</span></div>
<div class="line"><a id="l00524" name="l00524"></a><span class="lineno"> 524</span><span class="comment">*</span></div>
<div class="line"><a id="l00525" name="l00525"></a><span class="lineno"> 525</span><span class="comment">* wcsbth() accepts RADECSYS only if WCSHDR_AUXIMG is also</span></div>
<div class="line"><a id="l00526" name="l00526"></a><span class="lineno"> 526</span><span class="comment">* enabled.</span></div>
<div class="line"><a id="l00527" name="l00527"></a><span class="lineno"> 527</span><span class="comment">*</span></div>
<div class="line"><a id="l00528" name="l00528"></a><span class="lineno"> 528</span><span class="comment">* - WCSHDR_EPOCHa: Accept EPOCHa.</span></div>
<div class="line"><a id="l00529" name="l00529"></a><span class="lineno"> 529</span><span class="comment">*</span></div>
<div class="line"><a id="l00530" name="l00530"></a><span class="lineno"> 530</span><span class="comment">* - WCSHDR_VSOURCE: Accept VSOURCEa or VSOUna (wcsbth()). This appeared</span></div>
<div class="line"><a id="l00531" name="l00531"></a><span class="lineno"> 531</span><span class="comment">* in early drafts of WCS Paper III and was subsequently dropped</span></div>
<div class="line"><a id="l00532" name="l00532"></a><span class="lineno"> 532</span><span class="comment">* in favour of ZSOURCEa and ZSOUna.</span></div>
<div class="line"><a id="l00533" name="l00533"></a><span class="lineno"> 533</span><span class="comment">*</span></div>
<div class="line"><a id="l00534" name="l00534"></a><span class="lineno"> 534</span><span class="comment">* wcsbth() accepts VSOURCEa only if WCSHDR_AUXIMG is also</span></div>
<div class="line"><a id="l00535" name="l00535"></a><span class="lineno"> 535</span><span class="comment">* enabled.</span></div>
<div class="line"><a id="l00536" name="l00536"></a><span class="lineno"> 536</span><span class="comment">*</span></div>
<div class="line"><a id="l00537" name="l00537"></a><span class="lineno"> 537</span><span class="comment">* - WCSHDR_DATEREF: Accept DATE-REF, MJD-REF, MJD-REFI, MJD-REFF, JDREF,</span></div>
<div class="line"><a id="l00538" name="l00538"></a><span class="lineno"> 538</span><span class="comment">* JD-REFI, and JD-REFF as synonyms for the standard keywords,</span></div>
<div class="line"><a id="l00539" name="l00539"></a><span class="lineno"> 539</span><span class="comment">* DATEREF, MJDREF, MJDREFI, MJDREFF, JDREF, JDREFI, and JDREFF.</span></div>
<div class="line"><a id="l00540" name="l00540"></a><span class="lineno"> 540</span><span class="comment">* The latter buck the pattern set by the other date keywords</span></div>
<div class="line"><a id="l00541" name="l00541"></a><span class="lineno"> 541</span><span class="comment">* ({DATE,MJD}-{OBS,BEG,AVG,END}), thereby increasing the</span></div>
<div class="line"><a id="l00542" name="l00542"></a><span class="lineno"> 542</span><span class="comment">* potential for confusion and error.</span></div>
<div class="line"><a id="l00543" name="l00543"></a><span class="lineno"> 543</span><span class="comment">*</span></div>
<div class="line"><a id="l00544" name="l00544"></a><span class="lineno"> 544</span><span class="comment">* - WCSHDR_LONGKEY (wcsbth() only): Accept long forms of the alternate</span></div>
<div class="line"><a id="l00545" name="l00545"></a><span class="lineno"> 545</span><span class="comment">* binary table and pixel list WCS keywords, i.e. with "a" non-</span></div>
<div class="line"><a id="l00546" name="l00546"></a><span class="lineno"> 546</span><span class="comment">* blank. Specifically</span></div>
<div class="line"><a id="l00547" name="l00547"></a><span class="lineno"> 547</span><span class="comment">*</span></div>
<div class="line"><a id="l00548" name="l00548"></a><span class="lineno"> 548</span><span class="comment"># jCRPXna TCRPXna : jCRPXn jCRPna TCRPXn TCRPna CRPIXja</span></div>
<div class="line"><a id="l00549" name="l00549"></a><span class="lineno"> 549</span><span class="comment"># - TPCn_ka : - ijPCna - TPn_ka PCi_ja</span></div>
<div class="line"><a id="l00550" name="l00550"></a><span class="lineno"> 550</span><span class="comment"># - TCDn_ka : - ijCDna - TCn_ka CDi_ja</span></div>
<div class="line"><a id="l00551" name="l00551"></a><span class="lineno"> 551</span><span class="comment"># iCDLTna TCDLTna : iCDLTn iCDEna TCDLTn TCDEna CDELTia</span></div>
<div class="line"><a id="l00552" name="l00552"></a><span class="lineno"> 552</span><span class="comment"># iCUNIna TCUNIna : iCUNIn iCUNna TCUNIn TCUNna CUNITia</span></div>
<div class="line"><a id="l00553" name="l00553"></a><span class="lineno"> 553</span><span class="comment"># iCTYPna TCTYPna : iCTYPn iCTYna TCTYPn TCTYna CTYPEia</span></div>
<div class="line"><a id="l00554" name="l00554"></a><span class="lineno"> 554</span><span class="comment"># iCRVLna TCRVLna : iCRVLn iCRVna TCRVLn TCRVna CRVALia</span></div>
<div class="line"><a id="l00555" name="l00555"></a><span class="lineno"> 555</span><span class="comment"># iPVn_ma TPVn_ma : - iVn_ma - TVn_ma PVi_ma</span></div>
<div class="line"><a id="l00556" name="l00556"></a><span class="lineno"> 556</span><span class="comment"># iPSn_ma TPSn_ma : - iSn_ma - TSn_ma PSi_ma</span></div>
<div class="line"><a id="l00557" name="l00557"></a><span class="lineno"> 557</span><span class="comment">*</span></div>
<div class="line"><a id="l00558" name="l00558"></a><span class="lineno"> 558</span><span class="comment">* where the primary and standard alternate forms together with</span></div>
<div class="line"><a id="l00559" name="l00559"></a><span class="lineno"> 559</span><span class="comment">* the image-header equivalent are shown rightwards of the colon.</span></div>
<div class="line"><a id="l00560" name="l00560"></a><span class="lineno"> 560</span><span class="comment">*</span></div>
<div class="line"><a id="l00561" name="l00561"></a><span class="lineno"> 561</span><span class="comment">* The long form of these keywords could be described as quasi-</span></div>
<div class="line"><a id="l00562" name="l00562"></a><span class="lineno"> 562</span><span class="comment">* standard. TPCn_ka, iPVn_ma, and TPVn_ma appeared by mistake</span></div>
<div class="line"><a id="l00563" name="l00563"></a><span class="lineno"> 563</span><span class="comment">* in the examples in WCS Paper II and subsequently these and</span></div>
<div class="line"><a id="l00564" name="l00564"></a><span class="lineno"> 564</span><span class="comment">* also TCDn_ka, iPSn_ma and TPSn_ma were legitimized by the</span></div>
<div class="line"><a id="l00565" name="l00565"></a><span class="lineno"> 565</span><span class="comment">* errata to the WCS papers.</span></div>
<div class="line"><a id="l00566" name="l00566"></a><span class="lineno"> 566</span><span class="comment">*</span></div>
<div class="line"><a id="l00567" name="l00567"></a><span class="lineno"> 567</span><span class="comment">* Strictly speaking, the other long forms are non-standard and</span></div>
<div class="line"><a id="l00568" name="l00568"></a><span class="lineno"> 568</span><span class="comment">* in fact have never appeared in any draft of the WCS papers nor</span></div>
<div class="line"><a id="l00569" name="l00569"></a><span class="lineno"> 569</span><span class="comment">* in the errata. However, as natural extensions of the primary</span></div>
<div class="line"><a id="l00570" name="l00570"></a><span class="lineno"> 570</span><span class="comment">* form they are unlikely to be written with any other intention.</span></div>
<div class="line"><a id="l00571" name="l00571"></a><span class="lineno"> 571</span><span class="comment">* Thus it should be safe to accept them provided, of course,</span></div>
<div class="line"><a id="l00572" name="l00572"></a><span class="lineno"> 572</span><span class="comment">* that the resulting keyword does not exceed the 8-character</span></div>
<div class="line"><a id="l00573" name="l00573"></a><span class="lineno"> 573</span><span class="comment">* limit.</span></div>
<div class="line"><a id="l00574" name="l00574"></a><span class="lineno"> 574</span><span class="comment">*</span></div>
<div class="line"><a id="l00575" name="l00575"></a><span class="lineno"> 575</span><span class="comment">* If WCSHDR_CNAMn is enabled then also accept</span></div>
<div class="line"><a id="l00576" name="l00576"></a><span class="lineno"> 576</span><span class="comment">*</span></div>
<div class="line"><a id="l00577" name="l00577"></a><span class="lineno"> 577</span><span class="comment"># iCNAMna TCNAMna : --- iCNAna --- TCNAna CNAMEia</span></div>
<div class="line"><a id="l00578" name="l00578"></a><span class="lineno"> 578</span><span class="comment"># iCRDEna TCRDEna : --- iCRDna --- TCRDna CRDERia</span></div>
<div class="line"><a id="l00579" name="l00579"></a><span class="lineno"> 579</span><span class="comment"># iCSYEna TCSYEna : --- iCSYna --- TCSYna CSYERia</span></div>
<div class="line"><a id="l00580" name="l00580"></a><span class="lineno"> 580</span><span class="comment"># iCZPHna TCZPHna : --- iCZPna --- TCZPna CZPHSia</span></div>
<div class="line"><a id="l00581" name="l00581"></a><span class="lineno"> 581</span><span class="comment"># iCPERna TCPERna : --- iCPRna --- TCPRna CPERIia</span></div>
<div class="line"><a id="l00582" name="l00582"></a><span class="lineno"> 582</span><span class="comment">*</span></div>
<div class="line"><a id="l00583" name="l00583"></a><span class="lineno"> 583</span><span class="comment">* Note that CNAMEia, CRDERia, CSYERia, CZPHSia, CPERIia, and</span></div>
<div class="line"><a id="l00584" name="l00584"></a><span class="lineno"> 584</span><span class="comment">* their variants are not used by WCSLIB but are stored in the</span></div>
<div class="line"><a id="l00585" name="l00585"></a><span class="lineno"> 585</span><span class="comment">* wcsprm struct as auxiliary information.</span></div>
<div class="line"><a id="l00586" name="l00586"></a><span class="lineno"> 586</span><span class="comment">*</span></div>
<div class="line"><a id="l00587" name="l00587"></a><span class="lineno"> 587</span><span class="comment">* - WCSHDR_CNAMn (wcsbth() only): Accept iCNAMn, iCRDEn, iCSYEn, iCZPHn,</span></div>
<div class="line"><a id="l00588" name="l00588"></a><span class="lineno"> 588</span><span class="comment">* iCPERn, TCNAMn, TCRDEn, TCSYEn, TCZPHn, and TCPERn, i.e. with</span></div>
<div class="line"><a id="l00589" name="l00589"></a><span class="lineno"> 589</span><span class="comment">* "a" blank. While non-standard, these are the obvious analogues</span></div>
<div class="line"><a id="l00590" name="l00590"></a><span class="lineno"> 590</span><span class="comment">* of iCTYPn, TCTYPn, etc.</span></div>
<div class="line"><a id="l00591" name="l00591"></a><span class="lineno"> 591</span><span class="comment">*</span></div>
<div class="line"><a id="l00592" name="l00592"></a><span class="lineno"> 592</span><span class="comment">* - WCSHDR_AUXIMG (wcsbth() only): Allow the image-header form of an</span></div>
<div class="line"><a id="l00593" name="l00593"></a><span class="lineno"> 593</span><span class="comment">* auxiliary WCS keyword with representation-wide scope to</span></div>
<div class="line"><a id="l00594" name="l00594"></a><span class="lineno"> 594</span><span class="comment">* provide a default value for all images. This default may be</span></div>
<div class="line"><a id="l00595" name="l00595"></a><span class="lineno"> 595</span><span class="comment">* overridden by the column-specific form of the keyword.</span></div>
<div class="line"><a id="l00596" name="l00596"></a><span class="lineno"> 596</span><span class="comment">*</span></div>
<div class="line"><a id="l00597" name="l00597"></a><span class="lineno"> 597</span><span class="comment">* For example, a keyword like EQUINOXa would apply to all image</span></div>
<div class="line"><a id="l00598" name="l00598"></a><span class="lineno"> 598</span><span class="comment">* arrays in a binary table, or all pixel list columns with</span></div>
<div class="line"><a id="l00599" name="l00599"></a><span class="lineno"> 599</span><span class="comment">* alternate representation "a" unless overridden by EQUIna.</span></div>
<div class="line"><a id="l00600" name="l00600"></a><span class="lineno"> 600</span><span class="comment">*</span></div>
<div class="line"><a id="l00601" name="l00601"></a><span class="lineno"> 601</span><span class="comment">* Specifically the keywords are:</span></div>
<div class="line"><a id="l00602" name="l00602"></a><span class="lineno"> 602</span><span class="comment">*</span></div>
<div class="line"><a id="l00603" name="l00603"></a><span class="lineno"> 603</span><span class="comment"># LONPOLEa for LONPna</span></div>
<div class="line"><a id="l00604" name="l00604"></a><span class="lineno"> 604</span><span class="comment"># LATPOLEa for LATPna</span></div>
<div class="line"><a id="l00605" name="l00605"></a><span class="lineno"> 605</span><span class="comment"># VELREF - ... (No column-specific form.)</span></div>
<div class="line"><a id="l00606" name="l00606"></a><span class="lineno"> 606</span><span class="comment"># VELREFa - ... Only if WCSHDR_VELREFa is set.</span></div>
<div class="line"><a id="l00607" name="l00607"></a><span class="lineno"> 607</span><span class="comment">*</span></div>
<div class="line"><a id="l00608" name="l00608"></a><span class="lineno"> 608</span><span class="comment">* whose keyvalues are actually used by WCSLIB, and also keywords</span></div>
<div class="line"><a id="l00609" name="l00609"></a><span class="lineno"> 609</span><span class="comment">* providing auxiliary information that is simply stored in the</span></div>
<div class="line"><a id="l00610" name="l00610"></a><span class="lineno"> 610</span><span class="comment">* wcsprm struct:</span></div>
<div class="line"><a id="l00611" name="l00611"></a><span class="lineno"> 611</span><span class="comment">*</span></div>
<div class="line"><a id="l00612" name="l00612"></a><span class="lineno"> 612</span><span class="comment"># WCSNAMEa for WCSNna ... Or TWCSna (see below).</span></div>
<div class="line"><a id="l00613" name="l00613"></a><span class="lineno"> 613</span><span class="comment">#</span></div>
<div class="line"><a id="l00614" name="l00614"></a><span class="lineno"> 614</span><span class="comment"># DATE-OBS for DOBSn</span></div>
<div class="line"><a id="l00615" name="l00615"></a><span class="lineno"> 615</span><span class="comment"># MJD-OBS for MJDOBn</span></div>
<div class="line"><a id="l00616" name="l00616"></a><span class="lineno"> 616</span><span class="comment">#</span></div>
<div class="line"><a id="l00617" name="l00617"></a><span class="lineno"> 617</span><span class="comment"># RADESYSa for RADEna</span></div>
<div class="line"><a id="l00618" name="l00618"></a><span class="lineno"> 618</span><span class="comment"># RADECSYS for RADEna ... Only if WCSHDR_RADECSYS is set.</span></div>
<div class="line"><a id="l00619" name="l00619"></a><span class="lineno"> 619</span><span class="comment"># EPOCH - ... (No column-specific form.)</span></div>
<div class="line"><a id="l00620" name="l00620"></a><span class="lineno"> 620</span><span class="comment"># EPOCHa - ... Only if WCSHDR_EPOCHa is set.</span></div>
<div class="line"><a id="l00621" name="l00621"></a><span class="lineno"> 621</span><span class="comment"># EQUINOXa for EQUIna</span></div>
<div class="line"><a id="l00622" name="l00622"></a><span class="lineno"> 622</span><span class="comment">*</span></div>
<div class="line"><a id="l00623" name="l00623"></a><span class="lineno"> 623</span><span class="comment">* where the image-header keywords on the left provide default</span></div>
<div class="line"><a id="l00624" name="l00624"></a><span class="lineno"> 624</span><span class="comment">* values for the column specific keywords on the right.</span></div>
<div class="line"><a id="l00625" name="l00625"></a><span class="lineno"> 625</span><span class="comment">*</span></div>
<div class="line"><a id="l00626" name="l00626"></a><span class="lineno"> 626</span><span class="comment">* Note that, according to Sect. 8.1 of WCS Paper III, and</span></div>
<div class="line"><a id="l00627" name="l00627"></a><span class="lineno"> 627</span><span class="comment">* Sect. 5.2 of WCS Paper VII, the following are always inherited:</span></div>
<div class="line"><a id="l00628" name="l00628"></a><span class="lineno"> 628</span><span class="comment">*</span></div>
<div class="line"><a id="l00629" name="l00629"></a><span class="lineno"> 629</span><span class="comment"># RESTFREQ for RFRQna</span></div>
<div class="line"><a id="l00630" name="l00630"></a><span class="lineno"> 630</span><span class="comment"># RESTFRQa for RFRQna</span></div>
<div class="line"><a id="l00631" name="l00631"></a><span class="lineno"> 631</span><span class="comment"># RESTWAVa for RWAVna</span></div>
<div class="line"><a id="l00632" name="l00632"></a><span class="lineno"> 632</span><span class="comment">*</span></div>
<div class="line"><a id="l00633" name="l00633"></a><span class="lineno"> 633</span><span class="comment">* being those actually used by WCSLIB, together with the</span></div>
<div class="line"><a id="l00634" name="l00634"></a><span class="lineno"> 634</span><span class="comment">* following auxiliary keywords, many of which do not have binary</span></div>
<div class="line"><a id="l00635" name="l00635"></a><span class="lineno"> 635</span><span class="comment">* table equivalents and therefore can only be inherited:</span></div>
<div class="line"><a id="l00636" name="l00636"></a><span class="lineno"> 636</span><span class="comment">*</span></div>
<div class="line"><a id="l00637" name="l00637"></a><span class="lineno"> 637</span><span class="comment"># TIMESYS -</span></div>
<div class="line"><a id="l00638" name="l00638"></a><span class="lineno"> 638</span><span class="comment"># TREFPOS for TRPOSn</span></div>
<div class="line"><a id="l00639" name="l00639"></a><span class="lineno"> 639</span><span class="comment"># TREFDIR for TRDIRn</span></div>
<div class="line"><a id="l00640" name="l00640"></a><span class="lineno"> 640</span><span class="comment"># PLEPHEM -</span></div>
<div class="line"><a id="l00641" name="l00641"></a><span class="lineno"> 641</span><span class="comment"># TIMEUNIT -</span></div>
<div class="line"><a id="l00642" name="l00642"></a><span class="lineno"> 642</span><span class="comment"># DATEREF -</span></div>
<div class="line"><a id="l00643" name="l00643"></a><span class="lineno"> 643</span><span class="comment"># MJDREF -</span></div>
<div class="line"><a id="l00644" name="l00644"></a><span class="lineno"> 644</span><span class="comment"># MJDREFI -</span></div>
<div class="line"><a id="l00645" name="l00645"></a><span class="lineno"> 645</span><span class="comment"># MJDREFF -</span></div>
<div class="line"><a id="l00646" name="l00646"></a><span class="lineno"> 646</span><span class="comment"># JDREF -</span></div>
<div class="line"><a id="l00647" name="l00647"></a><span class="lineno"> 647</span><span class="comment"># JDREFI -</span></div>
<div class="line"><a id="l00648" name="l00648"></a><span class="lineno"> 648</span><span class="comment"># JDREFF -</span></div>
<div class="line"><a id="l00649" name="l00649"></a><span class="lineno"> 649</span><span class="comment"># TIMEOFFS -</span></div>
<div class="line"><a id="l00650" name="l00650"></a><span class="lineno"> 650</span><span class="comment">#</span></div>
<div class="line"><a id="l00651" name="l00651"></a><span class="lineno"> 651</span><span class="comment"># DATE-BEG -</span></div>
<div class="line"><a id="l00652" name="l00652"></a><span class="lineno"> 652</span><span class="comment"># DATE-AVG for DAVGn</span></div>
<div class="line"><a id="l00653" name="l00653"></a><span class="lineno"> 653</span><span class="comment"># DATE-END -</span></div>
<div class="line"><a id="l00654" name="l00654"></a><span class="lineno"> 654</span><span class="comment"># MJD-BEG -</span></div>
<div class="line"><a id="l00655" name="l00655"></a><span class="lineno"> 655</span><span class="comment"># MJD-AVG for MJDAn</span></div>
<div class="line"><a id="l00656" name="l00656"></a><span class="lineno"> 656</span><span class="comment"># MJD-END -</span></div>
<div class="line"><a id="l00657" name="l00657"></a><span class="lineno"> 657</span><span class="comment"># JEPOCH -</span></div>
<div class="line"><a id="l00658" name="l00658"></a><span class="lineno"> 658</span><span class="comment"># BEPOCH -</span></div>
<div class="line"><a id="l00659" name="l00659"></a><span class="lineno"> 659</span><span class="comment"># TSTART -</span></div>
<div class="line"><a id="l00660" name="l00660"></a><span class="lineno"> 660</span><span class="comment"># TSTOP -</span></div>
<div class="line"><a id="l00661" name="l00661"></a><span class="lineno"> 661</span><span class="comment"># XPOSURE -</span></div>
<div class="line"><a id="l00662" name="l00662"></a><span class="lineno"> 662</span><span class="comment"># TELAPSE -</span></div>
<div class="line"><a id="l00663" name="l00663"></a><span class="lineno"> 663</span><span class="comment">#</span></div>
<div class="line"><a id="l00664" name="l00664"></a><span class="lineno"> 664</span><span class="comment"># TIMSYER -</span></div>
<div class="line"><a id="l00665" name="l00665"></a><span class="lineno"> 665</span><span class="comment"># TIMRDER -</span></div>
<div class="line"><a id="l00666" name="l00666"></a><span class="lineno"> 666</span><span class="comment"># TIMEDEL -</span></div>
<div class="line"><a id="l00667" name="l00667"></a><span class="lineno"> 667</span><span class="comment"># TIMEPIXR -</span></div>
<div class="line"><a id="l00668" name="l00668"></a><span class="lineno"> 668</span><span class="comment">#</span></div>
<div class="line"><a id="l00669" name="l00669"></a><span class="lineno"> 669</span><span class="comment"># OBSGEO-X for OBSGXn</span></div>
<div class="line"><a id="l00670" name="l00670"></a><span class="lineno"> 670</span><span class="comment"># OBSGEO-Y for OBSGYn</span></div>
<div class="line"><a id="l00671" name="l00671"></a><span class="lineno"> 671</span><span class="comment"># OBSGEO-Z for OBSGZn</span></div>
<div class="line"><a id="l00672" name="l00672"></a><span class="lineno"> 672</span><span class="comment"># OBSGEO-L for OBSGLn</span></div>
<div class="line"><a id="l00673" name="l00673"></a><span class="lineno"> 673</span><span class="comment"># OBSGEO-B for OBSGBn</span></div>
<div class="line"><a id="l00674" name="l00674"></a><span class="lineno"> 674</span><span class="comment"># OBSGEO-H for OBSGHn</span></div>
<div class="line"><a id="l00675" name="l00675"></a><span class="lineno"> 675</span><span class="comment"># OBSORBIT -</span></div>
<div class="line"><a id="l00676" name="l00676"></a><span class="lineno"> 676</span><span class="comment">#</span></div>
<div class="line"><a id="l00677" name="l00677"></a><span class="lineno"> 677</span><span class="comment"># SPECSYSa for SPECna</span></div>
<div class="line"><a id="l00678" name="l00678"></a><span class="lineno"> 678</span><span class="comment"># SSYSOBSa for SOBSna</span></div>
<div class="line"><a id="l00679" name="l00679"></a><span class="lineno"> 679</span><span class="comment"># VELOSYSa for VSYSna</span></div>
<div class="line"><a id="l00680" name="l00680"></a><span class="lineno"> 680</span><span class="comment"># VSOURCEa for VSOUna ... Only if WCSHDR_VSOURCE is set.</span></div>
<div class="line"><a id="l00681" name="l00681"></a><span class="lineno"> 681</span><span class="comment"># ZSOURCEa for ZSOUna</span></div>
<div class="line"><a id="l00682" name="l00682"></a><span class="lineno"> 682</span><span class="comment"># SSYSSRCa for SSRCna</span></div>
<div class="line"><a id="l00683" name="l00683"></a><span class="lineno"> 683</span><span class="comment"># VELANGLa for VANGna</span></div>
<div class="line"><a id="l00684" name="l00684"></a><span class="lineno"> 684</span><span class="comment">*</span></div>
<div class="line"><a id="l00685" name="l00685"></a><span class="lineno"> 685</span><span class="comment">* Global image-header keywords, such as MJD-OBS, apply to all</span></div>
<div class="line"><a id="l00686" name="l00686"></a><span class="lineno"> 686</span><span class="comment">* alternate representations, and would therefore provide a</span></div>
<div class="line"><a id="l00687" name="l00687"></a><span class="lineno"> 687</span><span class="comment">* default value for all images in the header.</span></div>
<div class="line"><a id="l00688" name="l00688"></a><span class="lineno"> 688</span><span class="comment">*</span></div>
<div class="line"><a id="l00689" name="l00689"></a><span class="lineno"> 689</span><span class="comment">* This auxiliary inheritance mechanism applies to binary table</span></div>
<div class="line"><a id="l00690" name="l00690"></a><span class="lineno"> 690</span><span class="comment">* image arrays and pixel lists alike. Most of these keywords</span></div>
<div class="line"><a id="l00691" name="l00691"></a><span class="lineno"> 691</span><span class="comment">* have no default value, the exceptions being LONPOLEa and</span></div>
<div class="line"><a id="l00692" name="l00692"></a><span class="lineno"> 692</span><span class="comment">* LATPOLEa, and also RADESYSa and EQUINOXa which provide</span></div>
<div class="line"><a id="l00693" name="l00693"></a><span class="lineno"> 693</span><span class="comment">* defaults for each other. Thus one potential difficulty in</span></div>
<div class="line"><a id="l00694" name="l00694"></a><span class="lineno"> 694</span><span class="comment">* using WCSHDR_AUXIMG is that of erroneously inheriting one of</span></div>
<div class="line"><a id="l00695" name="l00695"></a><span class="lineno"> 695</span><span class="comment">* these four keywords.</span></div>
<div class="line"><a id="l00696" name="l00696"></a><span class="lineno"> 696</span><span class="comment">*</span></div>
<div class="line"><a id="l00697" name="l00697"></a><span class="lineno"> 697</span><span class="comment">* Also, beware of potential inconsistencies that may arise where,</span></div>
<div class="line"><a id="l00698" name="l00698"></a><span class="lineno"> 698</span><span class="comment">* for example, DATE-OBS is inherited, but MJD-OBS is overridden</span></div>
<div class="line"><a id="l00699" name="l00699"></a><span class="lineno"> 699</span><span class="comment">* by MJDOBn and specifies a different time. Pairs in this</span></div>
<div class="line"><a id="l00700" name="l00700"></a><span class="lineno"> 700</span><span class="comment">* category are:</span></div>
<div class="line"><a id="l00701" name="l00701"></a><span class="lineno"> 701</span><span class="comment">*</span></div>
<div class="line"><a id="l00702" name="l00702"></a><span class="lineno"> 702</span><span class="comment">= DATE-OBS/DOBSn versus MJD-OBS/MJDOBn</span></div>
<div class="line"><a id="l00703" name="l00703"></a><span class="lineno"> 703</span><span class="comment">= DATE-AVG/DAVGn versus MJD-AVG/MJDAn</span></div>
<div class="line"><a id="l00704" name="l00704"></a><span class="lineno"> 704</span><span class="comment">= RESTFRQa/RFRQna versus RESTWAVa/RWAVna</span></div>
<div class="line"><a id="l00705" name="l00705"></a><span class="lineno"> 705</span><span class="comment">= OBSGEO-[XYZ]/OBSG[XYZ]n versus OBSGEO-[LBH]/OBSG[LBH]n</span></div>
<div class="line"><a id="l00706" name="l00706"></a><span class="lineno"> 706</span><span class="comment">*</span></div>
<div class="line"><a id="l00707" name="l00707"></a><span class="lineno"> 707</span><span class="comment">* The wcsfixi() routines datfix() and obsfix() are provided to</span></div>
<div class="line"><a id="l00708" name="l00708"></a><span class="lineno"> 708</span><span class="comment">* check the consistency of these and other such pairs of</span></div>
<div class="line"><a id="l00709" name="l00709"></a><span class="lineno"> 709</span><span class="comment">* keywords.</span></div>
<div class="line"><a id="l00710" name="l00710"></a><span class="lineno"> 710</span><span class="comment">*</span></div>
<div class="line"><a id="l00711" name="l00711"></a><span class="lineno"> 711</span><span class="comment">* Unlike WCSHDR_ALLIMG, the existence of one (or all) of these</span></div>
<div class="line"><a id="l00712" name="l00712"></a><span class="lineno"> 712</span><span class="comment">* auxiliary WCS image header keywords will not by itself cause a</span></div>
<div class="line"><a id="l00713" name="l00713"></a><span class="lineno"> 713</span><span class="comment">* wcsprm struct to be created for alternate representation "a".</span></div>
<div class="line"><a id="l00714" name="l00714"></a><span class="lineno"> 714</span><span class="comment">* This is because they do not provide sufficient information to</span></div>
<div class="line"><a id="l00715" name="l00715"></a><span class="lineno"> 715</span><span class="comment">* create a non-trivial coordinate representation when used in</span></div>
<div class="line"><a id="l00716" name="l00716"></a><span class="lineno"> 716</span><span class="comment">* conjunction with the default values of those keywords that are</span></div>
<div class="line"><a id="l00717" name="l00717"></a><span class="lineno"> 717</span><span class="comment">* parameterized by axis number, such as CTYPEia.</span></div>
<div class="line"><a id="l00718" name="l00718"></a><span class="lineno"> 718</span><span class="comment">*</span></div>
<div class="line"><a id="l00719" name="l00719"></a><span class="lineno"> 719</span><span class="comment">* - WCSHDR_ALLIMG (wcsbth() only): Allow the image-header form of *all*</span></div>
<div class="line"><a id="l00720" name="l00720"></a><span class="lineno"> 720</span><span class="comment">* image header WCS keywords to provide a default value for all</span></div>
<div class="line"><a id="l00721" name="l00721"></a><span class="lineno"> 721</span><span class="comment">* image arrays in a binary table (n.b. not pixel list). This</span></div>
<div class="line"><a id="l00722" name="l00722"></a><span class="lineno"> 722</span><span class="comment">* default may be overridden by the column-specific form of the</span></div>
<div class="line"><a id="l00723" name="l00723"></a><span class="lineno"> 723</span><span class="comment">* keyword.</span></div>
<div class="line"><a id="l00724" name="l00724"></a><span class="lineno"> 724</span><span class="comment">*</span></div>
<div class="line"><a id="l00725" name="l00725"></a><span class="lineno"> 725</span><span class="comment">* For example, a keyword like CRPIXja would apply to all image</span></div>
<div class="line"><a id="l00726" name="l00726"></a><span class="lineno"> 726</span><span class="comment">* arrays in a binary table with alternate representation "a"</span></div>
<div class="line"><a id="l00727" name="l00727"></a><span class="lineno"> 727</span><span class="comment">* unless overridden by jCRPna.</span></div>
<div class="line"><a id="l00728" name="l00728"></a><span class="lineno"> 728</span><span class="comment">*</span></div>
<div class="line"><a id="l00729" name="l00729"></a><span class="lineno"> 729</span><span class="comment">* Specifically the keywords are those listed above for</span></div>
<div class="line"><a id="l00730" name="l00730"></a><span class="lineno"> 730</span><span class="comment">* WCSHDR_AUXIMG plus</span></div>
<div class="line"><a id="l00731" name="l00731"></a><span class="lineno"> 731</span><span class="comment">*</span></div>
<div class="line"><a id="l00732" name="l00732"></a><span class="lineno"> 732</span><span class="comment"># WCSAXESa for WCAXna</span></div>
<div class="line"><a id="l00733" name="l00733"></a><span class="lineno"> 733</span><span class="comment">*</span></div>
<div class="line"><a id="l00734" name="l00734"></a><span class="lineno"> 734</span><span class="comment">* which defines the coordinate dimensionality, and the following</span></div>
<div class="line"><a id="l00735" name="l00735"></a><span class="lineno"> 735</span><span class="comment">* keywords that are parameterized by axis number:</span></div>
<div class="line"><a id="l00736" name="l00736"></a><span class="lineno"> 736</span><span class="comment">*</span></div>
<div class="line"><a id="l00737" name="l00737"></a><span class="lineno"> 737</span><span class="comment"># CRPIXja for jCRPna</span></div>
<div class="line"><a id="l00738" name="l00738"></a><span class="lineno"> 738</span><span class="comment"># PCi_ja for ijPCna</span></div>
<div class="line"><a id="l00739" name="l00739"></a><span class="lineno"> 739</span><span class="comment"># CDi_ja for ijCDna</span></div>
<div class="line"><a id="l00740" name="l00740"></a><span class="lineno"> 740</span><span class="comment"># CDELTia for iCDEna</span></div>
<div class="line"><a id="l00741" name="l00741"></a><span class="lineno"> 741</span><span class="comment"># CROTAi for iCROTn</span></div>
<div class="line"><a id="l00742" name="l00742"></a><span class="lineno"> 742</span><span class="comment"># CROTAia - ... Only if WCSHDR_CROTAia is set.</span></div>
<div class="line"><a id="l00743" name="l00743"></a><span class="lineno"> 743</span><span class="comment"># CUNITia for iCUNna</span></div>
<div class="line"><a id="l00744" name="l00744"></a><span class="lineno"> 744</span><span class="comment"># CTYPEia for iCTYna</span></div>
<div class="line"><a id="l00745" name="l00745"></a><span class="lineno"> 745</span><span class="comment"># CRVALia for iCRVna</span></div>
<div class="line"><a id="l00746" name="l00746"></a><span class="lineno"> 746</span><span class="comment"># PVi_ma for iVn_ma</span></div>
<div class="line"><a id="l00747" name="l00747"></a><span class="lineno"> 747</span><span class="comment"># PSi_ma for iSn_ma</span></div>
<div class="line"><a id="l00748" name="l00748"></a><span class="lineno"> 748</span><span class="comment">#</span></div>
<div class="line"><a id="l00749" name="l00749"></a><span class="lineno"> 749</span><span class="comment"># CNAMEia for iCNAna</span></div>
<div class="line"><a id="l00750" name="l00750"></a><span class="lineno"> 750</span><span class="comment"># CRDERia for iCRDna</span></div>
<div class="line"><a id="l00751" name="l00751"></a><span class="lineno"> 751</span><span class="comment"># CSYERia for iCSYna</span></div>
<div class="line"><a id="l00752" name="l00752"></a><span class="lineno"> 752</span><span class="comment"># CZPHSia for iCZPna</span></div>
<div class="line"><a id="l00753" name="l00753"></a><span class="lineno"> 753</span><span class="comment"># CPERIia for iCPRna</span></div>
<div class="line"><a id="l00754" name="l00754"></a><span class="lineno"> 754</span><span class="comment">*</span></div>
<div class="line"><a id="l00755" name="l00755"></a><span class="lineno"> 755</span><span class="comment">* where the image-header keywords on the left provide default</span></div>
<div class="line"><a id="l00756" name="l00756"></a><span class="lineno"> 756</span><span class="comment">* values for the column specific keywords on the right.</span></div>
<div class="line"><a id="l00757" name="l00757"></a><span class="lineno"> 757</span><span class="comment">*</span></div>
<div class="line"><a id="l00758" name="l00758"></a><span class="lineno"> 758</span><span class="comment">* This full inheritance mechanism only applies to binary table</span></div>
<div class="line"><a id="l00759" name="l00759"></a><span class="lineno"> 759</span><span class="comment">* image arrays, not pixel lists, because in the latter case</span></div>
<div class="line"><a id="l00760" name="l00760"></a><span class="lineno"> 760</span><span class="comment">* there is no well-defined association between coordinate axis</span></div>
<div class="line"><a id="l00761" name="l00761"></a><span class="lineno"> 761</span><span class="comment">* number and column number (see note 9 below).</span></div>
<div class="line"><a id="l00762" name="l00762"></a><span class="lineno"> 762</span><span class="comment">*</span></div>
<div class="line"><a id="l00763" name="l00763"></a><span class="lineno"> 763</span><span class="comment">* Note that CNAMEia, CRDERia, CSYERia, and their variants are</span></div>
<div class="line"><a id="l00764" name="l00764"></a><span class="lineno"> 764</span><span class="comment">* not used by WCSLIB but are stored in the wcsprm struct as</span></div>
<div class="line"><a id="l00765" name="l00765"></a><span class="lineno"> 765</span><span class="comment">* auxiliary information.</span></div>
<div class="line"><a id="l00766" name="l00766"></a><span class="lineno"> 766</span><span class="comment">*</span></div>
<div class="line"><a id="l00767" name="l00767"></a><span class="lineno"> 767</span><span class="comment">* Note especially that at least one wcsprm struct will be</span></div>
<div class="line"><a id="l00768" name="l00768"></a><span class="lineno"> 768</span><span class="comment">* returned for each "a" found in one of the image header</span></div>
<div class="line"><a id="l00769" name="l00769"></a><span class="lineno"> 769</span><span class="comment">* keywords listed above:</span></div>
<div class="line"><a id="l00770" name="l00770"></a><span class="lineno"> 770</span><span class="comment">*</span></div>
<div class="line"><a id="l00771" name="l00771"></a><span class="lineno"> 771</span><span class="comment">* - If the image header keywords for "a" ARE NOT inherited by a</span></div>
<div class="line"><a id="l00772" name="l00772"></a><span class="lineno"> 772</span><span class="comment">* binary table, then the struct will not be associated with</span></div>
<div class="line"><a id="l00773" name="l00773"></a><span class="lineno"> 773</span><span class="comment">* any particular table column number and it is up to the user</span></div>
<div class="line"><a id="l00774" name="l00774"></a><span class="lineno"> 774</span><span class="comment">* to provide an association.</span></div>
<div class="line"><a id="l00775" name="l00775"></a><span class="lineno"> 775</span><span class="comment">*</span></div>
<div class="line"><a id="l00776" name="l00776"></a><span class="lineno"> 776</span><span class="comment">* - If the image header keywords for "a" ARE inherited by a</span></div>
<div class="line"><a id="l00777" name="l00777"></a><span class="lineno"> 777</span><span class="comment">* binary table image array, then those keywords are considered</span></div>
<div class="line"><a id="l00778" name="l00778"></a><span class="lineno"> 778</span><span class="comment">* to be "exhausted" and do not result in a separate wcsprm</span></div>
<div class="line"><a id="l00779" name="l00779"></a><span class="lineno"> 779</span><span class="comment">* struct.</span></div>
<div class="line"><a id="l00780" name="l00780"></a><span class="lineno"> 780</span><span class="comment">*</span></div>
<div class="line"><a id="l00781" name="l00781"></a><span class="lineno"> 781</span><span class="comment">* For example, to accept CD00i00j and PC00i00j and reject all other</span></div>
<div class="line"><a id="l00782" name="l00782"></a><span class="lineno"> 782</span><span class="comment">* extensions, use</span></div>
<div class="line"><a id="l00783" name="l00783"></a><span class="lineno"> 783</span><span class="comment">*</span></div>
<div class="line"><a id="l00784" name="l00784"></a><span class="lineno"> 784</span><span class="comment">= relax = WCSHDR_reject | WCSHDR_CD00i00j | WCSHDR_PC00i00j;</span></div>
<div class="line"><a id="l00785" name="l00785"></a><span class="lineno"> 785</span><span class="comment">*</span></div>
<div class="line"><a id="l00786" name="l00786"></a><span class="lineno"> 786</span><span class="comment">* The parser always treats EPOCH as subordinate to EQUINOXa if both are</span></div>
<div class="line"><a id="l00787" name="l00787"></a><span class="lineno"> 787</span><span class="comment">* present, and VSOURCEa is always subordinate to ZSOURCEa.</span></div>
<div class="line"><a id="l00788" name="l00788"></a><span class="lineno"> 788</span><span class="comment">*</span></div>
<div class="line"><a id="l00789" name="l00789"></a><span class="lineno"> 789</span><span class="comment">* Likewise, VELREF is subordinate to the formalism of WCS Paper III, see</span></div>
<div class="line"><a id="l00790" name="l00790"></a><span class="lineno"> 790</span><span class="comment">* spcaips().</span></div>
<div class="line"><a id="l00791" name="l00791"></a><span class="lineno"> 791</span><span class="comment">*</span></div>
<div class="line"><a id="l00792" name="l00792"></a><span class="lineno"> 792</span><span class="comment">* Neither wcspih() nor wcsbth() currently recognize the AIPS-convention</span></div>
<div class="line"><a id="l00793" name="l00793"></a><span class="lineno"> 793</span><span class="comment">* keywords ALTRPIX or ALTRVAL which effectively define an alternative</span></div>
<div class="line"><a id="l00794" name="l00794"></a><span class="lineno"> 794</span><span class="comment">* representation for a spectral axis.</span></div>
<div class="line"><a id="l00795" name="l00795"></a><span class="lineno"> 795</span><span class="comment">*</span></div>
<div class="line"><a id="l00796" name="l00796"></a><span class="lineno"> 796</span><span class="comment">* 6: Depending on what flags have been set in its "relax" argument,</span></div>
<div class="line"><a id="l00797" name="l00797"></a><span class="lineno"> 797</span><span class="comment">* wcsbth() could return as many as 27027 wcsprm structs:</span></div>
<div class="line"><a id="l00798" name="l00798"></a><span class="lineno"> 798</span><span class="comment">*</span></div>
<div class="line"><a id="l00799" name="l00799"></a><span class="lineno"> 799</span><span class="comment">* - Up to 27 unattached representations derived from image header</span></div>
<div class="line"><a id="l00800" name="l00800"></a><span class="lineno"> 800</span><span class="comment">* keywords.</span></div>
<div class="line"><a id="l00801" name="l00801"></a><span class="lineno"> 801</span><span class="comment">*</span></div>
<div class="line"><a id="l00802" name="l00802"></a><span class="lineno"> 802</span><span class="comment">* - Up to 27 structs for each of up to 999 columns containing an image</span></div>
<div class="line"><a id="l00803" name="l00803"></a><span class="lineno"> 803</span><span class="comment">* arrays.</span></div>
<div class="line"><a id="l00804" name="l00804"></a><span class="lineno"> 804</span><span class="comment">*</span></div>
<div class="line"><a id="l00805" name="l00805"></a><span class="lineno"> 805</span><span class="comment">* - Up to 27 structs for a pixel list.</span></div>
<div class="line"><a id="l00806" name="l00806"></a><span class="lineno"> 806</span><span class="comment">*</span></div>
<div class="line"><a id="l00807" name="l00807"></a><span class="lineno"> 807</span><span class="comment">* Note that it is considered legitimate for a column to contain an image</span></div>
<div class="line"><a id="l00808" name="l00808"></a><span class="lineno"> 808</span><span class="comment">* array and also form part of a pixel list, and in particular that</span></div>
<div class="line"><a id="l00809" name="l00809"></a><span class="lineno"> 809</span><span class="comment">* wcsbth() does not check the TFORM keyword for a pixel list column to</span></div>
<div class="line"><a id="l00810" name="l00810"></a><span class="lineno"> 810</span><span class="comment">* check that it is scalar.</span></div>
<div class="line"><a id="l00811" name="l00811"></a><span class="lineno"> 811</span><span class="comment">*</span></div>
<div class="line"><a id="l00812" name="l00812"></a><span class="lineno"> 812</span><span class="comment">* In practice, of course, a realistic binary table header is unlikely to</span></div>
<div class="line"><a id="l00813" name="l00813"></a><span class="lineno"> 813</span><span class="comment">* contain more than a handful of images.</span></div>
<div class="line"><a id="l00814" name="l00814"></a><span class="lineno"> 814</span><span class="comment">*</span></div>
<div class="line"><a id="l00815" name="l00815"></a><span class="lineno"> 815</span><span class="comment">* In order for wcsbth() to create a wcsprm struct for a particular</span></div>
<div class="line"><a id="l00816" name="l00816"></a><span class="lineno"> 816</span><span class="comment">* coordinate representation, at least one WCS keyword that defines an</span></div>
<div class="line"><a id="l00817" name="l00817"></a><span class="lineno"> 817</span><span class="comment">* axis number must be present, either directly or by inheritance if</span></div>
<div class="line"><a id="l00818" name="l00818"></a><span class="lineno"> 818</span><span class="comment">* WCSHDR_ALLIMG is set.</span></div>
<div class="line"><a id="l00819" name="l00819"></a><span class="lineno"> 819</span><span class="comment">*</span></div>
<div class="line"><a id="l00820" name="l00820"></a><span class="lineno"> 820</span><span class="comment">* When the image header keywords for an alternate representation are</span></div>
<div class="line"><a id="l00821" name="l00821"></a><span class="lineno"> 821</span><span class="comment">* inherited by a binary table image array via WCSHDR_ALLIMG, those</span></div>
<div class="line"><a id="l00822" name="l00822"></a><span class="lineno"> 822</span><span class="comment">* keywords are considered to be "exhausted" and do not result in a</span></div>
<div class="line"><a id="l00823" name="l00823"></a><span class="lineno"> 823</span><span class="comment">* separate wcsprm struct. Otherwise they do.</span></div>
<div class="line"><a id="l00824" name="l00824"></a><span class="lineno"> 824</span><span class="comment">*</span></div>
<div class="line"><a id="l00825" name="l00825"></a><span class="lineno"> 825</span><span class="comment">* 7: Neither wcspih() nor wcsbth() check for duplicated keywords, in most</span></div>
<div class="line"><a id="l00826" name="l00826"></a><span class="lineno"> 826</span><span class="comment">* cases they accept the last encountered.</span></div>
<div class="line"><a id="l00827" name="l00827"></a><span class="lineno"> 827</span><span class="comment">*</span></div>
<div class="line"><a id="l00828" name="l00828"></a><span class="lineno"> 828</span><span class="comment">* 8: wcspih() and wcsbth() use wcsnpv() and wcsnps() (refer to the prologue</span></div>
<div class="line"><a id="l00829" name="l00829"></a><span class="lineno"> 829</span><span class="comment">* of wcs.h) to match the size of the pv[] and ps[] arrays in the wcsprm</span></div>
<div class="line"><a id="l00830" name="l00830"></a><span class="lineno"> 830</span><span class="comment">* structs to the number in the header. Consequently there are no unused</span></div>
<div class="line"><a id="l00831" name="l00831"></a><span class="lineno"> 831</span><span class="comment">* elements in the pv[] and ps[] arrays, indeed they will often be of</span></div>
<div class="line"><a id="l00832" name="l00832"></a><span class="lineno"> 832</span><span class="comment">* zero length.</span></div>
<div class="line"><a id="l00833" name="l00833"></a><span class="lineno"> 833</span><span class="comment">*</span></div>
<div class="line"><a id="l00834" name="l00834"></a><span class="lineno"> 834</span><span class="comment">* 9: The FITS WCS standard for pixel lists assumes that a pixel list</span></div>
<div class="line"><a id="l00835" name="l00835"></a><span class="lineno"> 835</span><span class="comment">* defines one and only one image, i.e. that each row of the binary table</span></div>
<div class="line"><a id="l00836" name="l00836"></a><span class="lineno"> 836</span><span class="comment">* refers to just one event, e.g. the detection of a single photon or</span></div>
<div class="line"><a id="l00837" name="l00837"></a><span class="lineno"> 837</span><span class="comment">* neutrino, for which the device "pixel" coordinates are stored in</span></div>
<div class="line"><a id="l00838" name="l00838"></a><span class="lineno"> 838</span><span class="comment">* separate scalar columns of the table.</span></div>
<div class="line"><a id="l00839" name="l00839"></a><span class="lineno"> 839</span><span class="comment">*</span></div>
<div class="line"><a id="l00840" name="l00840"></a><span class="lineno"> 840</span><span class="comment">* In the absence of a standard for pixel lists - or even an informal</span></div>
<div class="line"><a id="l00841" name="l00841"></a><span class="lineno"> 841</span><span class="comment">* description! - let alone a formal mechanism for identifying the columns</span></div>
<div class="line"><a id="l00842" name="l00842"></a><span class="lineno"> 842</span><span class="comment">* containing pixel coordinates (as opposed to pixel values or metadata</span></div>
<div class="line"><a id="l00843" name="l00843"></a><span class="lineno"> 843</span><span class="comment">* recorded at the time the photon or neutrino was detected), WCS Paper I</span></div>
<div class="line"><a id="l00844" name="l00844"></a><span class="lineno"> 844</span><span class="comment">* discusses how the WCS keywords themselves may be used to identify them.</span></div>
<div class="line"><a id="l00845" name="l00845"></a><span class="lineno"> 845</span><span class="comment">*</span></div>
<div class="line"><a id="l00846" name="l00846"></a><span class="lineno"> 846</span><span class="comment">* In practice, however, pixel lists have been used to store multiple</span></div>
<div class="line"><a id="l00847" name="l00847"></a><span class="lineno"> 847</span><span class="comment">* images. Besides not specifying how to identify columns, the pixel list</span></div>
<div class="line"><a id="l00848" name="l00848"></a><span class="lineno"> 848</span><span class="comment">* convention is also silent on the method to be used to associate table</span></div>
<div class="line"><a id="l00849" name="l00849"></a><span class="lineno"> 849</span><span class="comment">* columns with image axes.</span></div>
<div class="line"><a id="l00850" name="l00850"></a><span class="lineno"> 850</span><span class="comment">*</span></div>
<div class="line"><a id="l00851" name="l00851"></a><span class="lineno"> 851</span><span class="comment">* An additional shortcoming is the absence of a formal method for</span></div>
<div class="line"><a id="l00852" name="l00852"></a><span class="lineno"> 852</span><span class="comment">* associating global binary-table WCS keywords, such as WCSNna or MJDOBn,</span></div>
<div class="line"><a id="l00853" name="l00853"></a><span class="lineno"> 853</span><span class="comment">* with a pixel list image, whether one or several.</span></div>
<div class="line"><a id="l00854" name="l00854"></a><span class="lineno"> 854</span><span class="comment">*</span></div>
<div class="line"><a id="l00855" name="l00855"></a><span class="lineno"> 855</span><span class="comment">* In light of these uncertainties, wcsbth() simply collects all WCS</span></div>
<div class="line"><a id="l00856" name="l00856"></a><span class="lineno"> 856</span><span class="comment">* keywords for a particular pixel list coordinate representation (i.e.</span></div>
<div class="line"><a id="l00857" name="l00857"></a><span class="lineno"> 857</span><span class="comment">* the "a" value in TCTYna) into one wcsprm struct. However, these</span></div>
<div class="line"><a id="l00858" name="l00858"></a><span class="lineno"> 858</span><span class="comment">* alternates need not be associated with the same table columns and this</span></div>
<div class="line"><a id="l00859" name="l00859"></a><span class="lineno"> 859</span><span class="comment">* allows a pixel list to contain up to 27 separate images. As usual, if</span></div>
<div class="line"><a id="l00860" name="l00860"></a><span class="lineno"> 860</span><span class="comment">* one of these representations happened to contain more than two</span></div>
<div class="line"><a id="l00861" name="l00861"></a><span class="lineno"> 861</span><span class="comment">* celestial axes, for example, then an error would result when wcsset()</span></div>
<div class="line"><a id="l00862" name="l00862"></a><span class="lineno"> 862</span><span class="comment">* is invoked on it. In this case the "colsel" argument could be used to</span></div>
<div class="line"><a id="l00863" name="l00863"></a><span class="lineno"> 863</span><span class="comment">* restrict the columns used to construct the representation so that it</span></div>
<div class="line"><a id="l00864" name="l00864"></a><span class="lineno"> 864</span><span class="comment">* only contained one pair of celestial axes.</span></div>
<div class="line"><a id="l00865" name="l00865"></a><span class="lineno"> 865</span><span class="comment">*</span></div>
<div class="line"><a id="l00866" name="l00866"></a><span class="lineno"> 866</span><span class="comment">* Global, binary-table WCS keywords are considered to apply to the pixel</span></div>
<div class="line"><a id="l00867" name="l00867"></a><span class="lineno"> 867</span><span class="comment">* list image with matching alternate (e.g. the "a" value in LONPna or</span></div>
<div class="line"><a id="l00868" name="l00868"></a><span class="lineno"> 868</span><span class="comment">* EQUIna), regardless of the table columns the image occupies. In other</span></div>
<div class="line"><a id="l00869" name="l00869"></a><span class="lineno"> 869</span><span class="comment">* words, the column number is ignored (the "n" value in LONPna or</span></div>
<div class="line"><a id="l00870" name="l00870"></a><span class="lineno"> 870</span><span class="comment">* EQUIna). This also applies for global, binary-table WCS keywords that</span></div>
<div class="line"><a id="l00871" name="l00871"></a><span class="lineno"> 871</span><span class="comment">* have no alternates, such as MJDOBn and OBSGXn, which match all images</span></div>
<div class="line"><a id="l00872" name="l00872"></a><span class="lineno"> 872</span><span class="comment">* in a pixel list. Take heed that this may lead to counterintuitive</span></div>
<div class="line"><a id="l00873" name="l00873"></a><span class="lineno"> 873</span><span class="comment">* behaviour, especially where such a keyword references a column that</span></div>
<div class="line"><a id="l00874" name="l00874"></a><span class="lineno"> 874</span><span class="comment">* does not store pixel coordinates, and moreso where the pixel list</span></div>
<div class="line"><a id="l00875" name="l00875"></a><span class="lineno"> 875</span><span class="comment">* stores only a single image. In fact, as the column number, n, is</span></div>
<div class="line"><a id="l00876" name="l00876"></a><span class="lineno"> 876</span><span class="comment">* ignored for such keywords, it would make no difference even if they</span></div>
<div class="line"><a id="l00877" name="l00877"></a><span class="lineno"> 877</span><span class="comment">* referenced non-existent columns. Moreover, there is no requirement for</span></div>
<div class="line"><a id="l00878" name="l00878"></a><span class="lineno"> 878</span><span class="comment">* consistency in the column numbers used for such keywords, even for</span></div>
<div class="line"><a id="l00879" name="l00879"></a><span class="lineno"> 879</span><span class="comment">* OBSGXn, OBSGYn, and OBSGZn which are meant to define the elements of a</span></div>
<div class="line"><a id="l00880" name="l00880"></a><span class="lineno"> 880</span><span class="comment">* coordinate vector. Although it would surely be perverse to construct a</span></div>
<div class="line"><a id="l00881" name="l00881"></a><span class="lineno"> 881</span><span class="comment">* pixel list like this, such a situation may still arise in practice</span></div>
<div class="line"><a id="l00882" name="l00882"></a><span class="lineno"> 882</span><span class="comment">* where columns are deleted from a binary table.</span></div>
<div class="line"><a id="l00883" name="l00883"></a><span class="lineno"> 883</span><span class="comment">*</span></div>
<div class="line"><a id="l00884" name="l00884"></a><span class="lineno"> 884</span><span class="comment">* The situation with global, binary-table WCS keywords becomes</span></div>
<div class="line"><a id="l00885" name="l00885"></a><span class="lineno"> 885</span><span class="comment">* potentially even more confusing when image arrays and pixel list images</span></div>
<div class="line"><a id="l00886" name="l00886"></a><span class="lineno"> 886</span><span class="comment">* coexist in one binary table. In that case, a keyword such as MJDOBn</span></div>
<div class="line"><a id="l00887" name="l00887"></a><span class="lineno"> 887</span><span class="comment">* may legitimately appear multiple times with n referencing different</span></div>
<div class="line"><a id="l00888" name="l00888"></a><span class="lineno"> 888</span><span class="comment">* image arrays. Which then is the one that applies to the pixel list</span></div>
<div class="line"><a id="l00889" name="l00889"></a><span class="lineno"> 889</span><span class="comment">* images? In this implementation, it is the last instance that appears</span></div>
<div class="line"><a id="l00890" name="l00890"></a><span class="lineno"> 890</span><span class="comment">* in the header, whether or not it is also associated with an image</span></div>
<div class="line"><a id="l00891" name="l00891"></a><span class="lineno"> 891</span><span class="comment">* array.</span></div>
<div class="line"><a id="l00892" name="l00892"></a><span class="lineno"> 892</span><span class="comment">*</span></div>
<div class="line"><a id="l00893" name="l00893"></a><span class="lineno"> 893</span><span class="comment">*</span></div>
<div class="line"><a id="l00894" name="l00894"></a><span class="lineno"> 894</span><span class="comment">* wcstab() - Tabular construction routine</span></div>
<div class="line"><a id="l00895" name="l00895"></a><span class="lineno"> 895</span><span class="comment">* ---------------------------------------</span></div>
<div class="line"><a id="l00896" name="l00896"></a><span class="lineno"> 896</span><span class="comment">* wcstab() assists in filling in the information in the wcsprm struct relating</span></div>
<div class="line"><a id="l00897" name="l00897"></a><span class="lineno"> 897</span><span class="comment">* to coordinate lookup tables.</span></div>
<div class="line"><a id="l00898" name="l00898"></a><span class="lineno"> 898</span><span class="comment">*</span></div>
<div class="line"><a id="l00899" name="l00899"></a><span class="lineno"> 899</span><span class="comment">* Tabular coordinates ('TAB') present certain difficulties in that the main</span></div>
<div class="line"><a id="l00900" name="l00900"></a><span class="lineno"> 900</span><span class="comment">* components of the lookup table - the multidimensional coordinate array plus</span></div>
<div class="line"><a id="l00901" name="l00901"></a><span class="lineno"> 901</span><span class="comment">* an index vector for each dimension - are stored in a FITS binary table</span></div>
<div class="line"><a id="l00902" name="l00902"></a><span class="lineno"> 902</span><span class="comment">* extension (BINTABLE). Information required to locate these arrays is stored</span></div>
<div class="line"><a id="l00903" name="l00903"></a><span class="lineno"> 903</span><span class="comment">* in PVi_ma and PSi_ma keywords in the image header.</span></div>
<div class="line"><a id="l00904" name="l00904"></a><span class="lineno"> 904</span><span class="comment">*</span></div>
<div class="line"><a id="l00905" name="l00905"></a><span class="lineno"> 905</span><span class="comment">* wcstab() parses the PVi_ma and PSi_ma keywords associated with each 'TAB'</span></div>
<div class="line"><a id="l00906" name="l00906"></a><span class="lineno"> 906</span><span class="comment">* axis and allocates memory in the wcsprm struct for the required number of</span></div>
<div class="line"><a id="l00907" name="l00907"></a><span class="lineno"> 907</span><span class="comment">* tabprm structs. It sets as much of the tabprm struct as can be gleaned from</span></div>
<div class="line"><a id="l00908" name="l00908"></a><span class="lineno"> 908</span><span class="comment">* the image header, and also sets up an array of wtbarr structs (described in</span></div>
<div class="line"><a id="l00909" name="l00909"></a><span class="lineno"> 909</span><span class="comment">* the prologue of wtbarr.h) to assist in extracting the required arrays from</span></div>
<div class="line"><a id="l00910" name="l00910"></a><span class="lineno"> 910</span><span class="comment">* the BINTABLE extension(s).</span></div>
<div class="line"><a id="l00911" name="l00911"></a><span class="lineno"> 911</span><span class="comment">*</span></div>
<div class="line"><a id="l00912" name="l00912"></a><span class="lineno"> 912</span><span class="comment">* It is then up to the user to allocate memory for, and copy arrays from the</span></div>
<div class="line"><a id="l00913" name="l00913"></a><span class="lineno"> 913</span><span class="comment">* BINTABLE extension(s) into the tabprm structs. A CFITSIO routine,</span></div>
<div class="line"><a id="l00914" name="l00914"></a><span class="lineno"> 914</span><span class="comment">* fits_read_wcstab(), has been provided for this purpose, see getwcstab.h.</span></div>
<div class="line"><a id="l00915" name="l00915"></a><span class="lineno"> 915</span><span class="comment">* wcsset() will automatically take control of this allocated memory, in</span></div>
<div class="line"><a id="l00916" name="l00916"></a><span class="lineno"> 916</span><span class="comment">* particular causing it to be freed by wcsfree(); the user must not attempt</span></div>
<div class="line"><a id="l00917" name="l00917"></a><span class="lineno"> 917</span><span class="comment">* to free it after wcsset() has been called.</span></div>
<div class="line"><a id="l00918" name="l00918"></a><span class="lineno"> 918</span><span class="comment">*</span></div>
<div class="line"><a id="l00919" name="l00919"></a><span class="lineno"> 919</span><span class="comment">* Note that wcspih() and wcsbth() automatically invoke wcstab() on each of the</span></div>
<div class="line"><a id="l00920" name="l00920"></a><span class="lineno"> 920</span><span class="comment">* wcsprm structs that they return.</span></div>
<div class="line"><a id="l00921" name="l00921"></a><span class="lineno"> 921</span><span class="comment">*</span></div>
<div class="line"><a id="l00922" name="l00922"></a><span class="lineno"> 922</span><span class="comment">* Given and returned:</span></div>
<div class="line"><a id="l00923" name="l00923"></a><span class="lineno"> 923</span><span class="comment">* wcs struct wcsprm*</span></div>
<div class="line"><a id="l00924" name="l00924"></a><span class="lineno"> 924</span><span class="comment">* Coordinate transformation parameters (see below).</span></div>
<div class="line"><a id="l00925" name="l00925"></a><span class="lineno"> 925</span><span class="comment">*</span></div>
<div class="line"><a id="l00926" name="l00926"></a><span class="lineno"> 926</span><span class="comment">* wcstab() sets ntab, tab, nwtb and wtb, allocating</span></div>
<div class="line"><a id="l00927" name="l00927"></a><span class="lineno"> 927</span><span class="comment">* memory for the tab and wtb arrays. This allocated</span></div>
<div class="line"><a id="l00928" name="l00928"></a><span class="lineno"> 928</span><span class="comment">* memory will be freed automatically by wcsfree().</span></div>
<div class="line"><a id="l00929" name="l00929"></a><span class="lineno"> 929</span><span class="comment">*</span></div>
<div class="line"><a id="l00930" name="l00930"></a><span class="lineno"> 930</span><span class="comment">* Function return value:</span></div>
<div class="line"><a id="l00931" name="l00931"></a><span class="lineno"> 931</span><span class="comment">* int Status return value:</span></div>
<div class="line"><a id="l00932" name="l00932"></a><span class="lineno"> 932</span><span class="comment">* 0: Success.</span></div>
<div class="line"><a id="l00933" name="l00933"></a><span class="lineno"> 933</span><span class="comment">* 1: Null wcsprm pointer passed.</span></div>
<div class="line"><a id="l00934" name="l00934"></a><span class="lineno"> 934</span><span class="comment">* 2: Memory allocation failed.</span></div>
<div class="line"><a id="l00935" name="l00935"></a><span class="lineno"> 935</span><span class="comment">* 3: Invalid tabular parameters.</span></div>
<div class="line"><a id="l00936" name="l00936"></a><span class="lineno"> 936</span><span class="comment">*</span></div>
<div class="line"><a id="l00937" name="l00937"></a><span class="lineno"> 937</span><span class="comment">* For returns > 1, a detailed error message is set in</span></div>
<div class="line"><a id="l00938" name="l00938"></a><span class="lineno"> 938</span><span class="comment">* wcsprm::err if enabled, see wcserr_enable().</span></div>
<div class="line"><a id="l00939" name="l00939"></a><span class="lineno"> 939</span><span class="comment">*</span></div>
<div class="line"><a id="l00940" name="l00940"></a><span class="lineno"> 940</span><span class="comment">*</span></div>
<div class="line"><a id="l00941" name="l00941"></a><span class="lineno"> 941</span><span class="comment">* wcsidx() - Index alternate coordinate representations</span></div>
<div class="line"><a id="l00942" name="l00942"></a><span class="lineno"> 942</span><span class="comment">* -----------------------------------------------------</span></div>
<div class="line"><a id="l00943" name="l00943"></a><span class="lineno"> 943</span><span class="comment">* wcsidx() returns an array of 27 indices for the alternate coordinate</span></div>
<div class="line"><a id="l00944" name="l00944"></a><span class="lineno"> 944</span><span class="comment">* representations in the array of wcsprm structs returned by wcspih(). For</span></div>
<div class="line"><a id="l00945" name="l00945"></a><span class="lineno"> 945</span><span class="comment">* the array returned by wcsbth() it returns indices for the unattached</span></div>
<div class="line"><a id="l00946" name="l00946"></a><span class="lineno"> 946</span><span class="comment">* (colnum == 0) representations derived from image header keywords - use</span></div>
<div class="line"><a id="l00947" name="l00947"></a><span class="lineno"> 947</span><span class="comment">* wcsbdx() for those derived from binary table image arrays or pixel lists</span></div>
<div class="line"><a id="l00948" name="l00948"></a><span class="lineno"> 948</span><span class="comment">* keywords.</span></div>
<div class="line"><a id="l00949" name="l00949"></a><span class="lineno"> 949</span><span class="comment">*</span></div>
<div class="line"><a id="l00950" name="l00950"></a><span class="lineno"> 950</span><span class="comment">* Given:</span></div>
<div class="line"><a id="l00951" name="l00951"></a><span class="lineno"> 951</span><span class="comment">* nwcs int Number of coordinate representations in the array.</span></div>
<div class="line"><a id="l00952" name="l00952"></a><span class="lineno"> 952</span><span class="comment">*</span></div>
<div class="line"><a id="l00953" name="l00953"></a><span class="lineno"> 953</span><span class="comment">* wcs const struct wcsprm**</span></div>
<div class="line"><a id="l00954" name="l00954"></a><span class="lineno"> 954</span><span class="comment">* Pointer to an array of wcsprm structs returned by</span></div>
<div class="line"><a id="l00955" name="l00955"></a><span class="lineno"> 955</span><span class="comment">* wcspih() or wcsbth().</span></div>
<div class="line"><a id="l00956" name="l00956"></a><span class="lineno"> 956</span><span class="comment">*</span></div>
<div class="line"><a id="l00957" name="l00957"></a><span class="lineno"> 957</span><span class="comment">* Returned:</span></div>
<div class="line"><a id="l00958" name="l00958"></a><span class="lineno"> 958</span><span class="comment">* alts int[27] Index of each alternate coordinate representation in</span></div>
<div class="line"><a id="l00959" name="l00959"></a><span class="lineno"> 959</span><span class="comment">* the array: alts[0] for the primary, alts[1] for 'A',</span></div>
<div class="line"><a id="l00960" name="l00960"></a><span class="lineno"> 960</span><span class="comment">* etc., set to -1 if not present.</span></div>
<div class="line"><a id="l00961" name="l00961"></a><span class="lineno"> 961</span><span class="comment">*</span></div>
<div class="line"><a id="l00962" name="l00962"></a><span class="lineno"> 962</span><span class="comment">* For example, if there was no 'P' representation then</span></div>
<div class="line"><a id="l00963" name="l00963"></a><span class="lineno"> 963</span><span class="comment">*</span></div>
<div class="line"><a id="l00964" name="l00964"></a><span class="lineno"> 964</span><span class="comment">= alts['P'-'A'+1] == -1;</span></div>
<div class="line"><a id="l00965" name="l00965"></a><span class="lineno"> 965</span><span class="comment">*</span></div>
<div class="line"><a id="l00966" name="l00966"></a><span class="lineno"> 966</span><span class="comment">* Otherwise, the address of its wcsprm struct would be</span></div>
<div class="line"><a id="l00967" name="l00967"></a><span class="lineno"> 967</span><span class="comment">*</span></div>
<div class="line"><a id="l00968" name="l00968"></a><span class="lineno"> 968</span><span class="comment">= wcs + alts['P'-'A'+1];</span></div>
<div class="line"><a id="l00969" name="l00969"></a><span class="lineno"> 969</span><span class="comment">*</span></div>
<div class="line"><a id="l00970" name="l00970"></a><span class="lineno"> 970</span><span class="comment">* Function return value:</span></div>
<div class="line"><a id="l00971" name="l00971"></a><span class="lineno"> 971</span><span class="comment">* int Status return value:</span></div>
<div class="line"><a id="l00972" name="l00972"></a><span class="lineno"> 972</span><span class="comment">* 0: Success.</span></div>
<div class="line"><a id="l00973" name="l00973"></a><span class="lineno"> 973</span><span class="comment">* 1: Null wcsprm pointer passed.</span></div>
<div class="line"><a id="l00974" name="l00974"></a><span class="lineno"> 974</span><span class="comment">*</span></div>
<div class="line"><a id="l00975" name="l00975"></a><span class="lineno"> 975</span><span class="comment">*</span></div>
<div class="line"><a id="l00976" name="l00976"></a><span class="lineno"> 976</span><span class="comment">* wcsbdx() - Index alternate coordinate representions</span></div>
<div class="line"><a id="l00977" name="l00977"></a><span class="lineno"> 977</span><span class="comment">* ---------------------------------------------------</span></div>
<div class="line"><a id="l00978" name="l00978"></a><span class="lineno"> 978</span><span class="comment">* wcsbdx() returns an array of 999 x 27 indices for the alternate coordinate</span></div>
<div class="line"><a id="l00979" name="l00979"></a><span class="lineno"> 979</span><span class="comment">* representions for binary table image arrays xor pixel lists in the array of</span></div>
<div class="line"><a id="l00980" name="l00980"></a><span class="lineno"> 980</span><span class="comment">* wcsprm structs returned by wcsbth(). Use wcsidx() for the unattached</span></div>
<div class="line"><a id="l00981" name="l00981"></a><span class="lineno"> 981</span><span class="comment">* representations derived from image header keywords.</span></div>
<div class="line"><a id="l00982" name="l00982"></a><span class="lineno"> 982</span><span class="comment">*</span></div>
<div class="line"><a id="l00983" name="l00983"></a><span class="lineno"> 983</span><span class="comment">* Given:</span></div>
<div class="line"><a id="l00984" name="l00984"></a><span class="lineno"> 984</span><span class="comment">* nwcs int Number of coordinate representations in the array.</span></div>
<div class="line"><a id="l00985" name="l00985"></a><span class="lineno"> 985</span><span class="comment">*</span></div>
<div class="line"><a id="l00986" name="l00986"></a><span class="lineno"> 986</span><span class="comment">* wcs const struct wcsprm**</span></div>
<div class="line"><a id="l00987" name="l00987"></a><span class="lineno"> 987</span><span class="comment">* Pointer to an array of wcsprm structs returned by</span></div>
<div class="line"><a id="l00988" name="l00988"></a><span class="lineno"> 988</span><span class="comment">* wcsbth().</span></div>
<div class="line"><a id="l00989" name="l00989"></a><span class="lineno"> 989</span><span class="comment">*</span></div>
<div class="line"><a id="l00990" name="l00990"></a><span class="lineno"> 990</span><span class="comment">* type int Select the type of coordinate representation:</span></div>
<div class="line"><a id="l00991" name="l00991"></a><span class="lineno"> 991</span><span class="comment">* 0: binary table image arrays,</span></div>
<div class="line"><a id="l00992" name="l00992"></a><span class="lineno"> 992</span><span class="comment">* 1: pixel lists.</span></div>
<div class="line"><a id="l00993" name="l00993"></a><span class="lineno"> 993</span><span class="comment">*</span></div>
<div class="line"><a id="l00994" name="l00994"></a><span class="lineno"> 994</span><span class="comment">* Returned:</span></div>
<div class="line"><a id="l00995" name="l00995"></a><span class="lineno"> 995</span><span class="comment">* alts short[1000][28]</span></div>
<div class="line"><a id="l00996" name="l00996"></a><span class="lineno"> 996</span><span class="comment">* Index of each alternate coordinate represention in the</span></div>
<div class="line"><a id="l00997" name="l00997"></a><span class="lineno"> 997</span><span class="comment">* array: alts[col][0] for the primary, alts[col][1] for</span></div>
<div class="line"><a id="l00998" name="l00998"></a><span class="lineno"> 998</span><span class="comment">* 'A', to alts[col][26] for 'Z', where col is the</span></div>
<div class="line"><a id="l00999" name="l00999"></a><span class="lineno"> 999</span><span class="comment">* 1-relative column number, and col == 0 is used for</span></div>
<div class="line"><a id="l01000" name="l01000"></a><span class="lineno"> 1000</span><span class="comment">* unattached image headers. Set to -1 if not present.</span></div>
<div class="line"><a id="l01001" name="l01001"></a><span class="lineno"> 1001</span><span class="comment">*</span></div>
<div class="line"><a id="l01002" name="l01002"></a><span class="lineno"> 1002</span><span class="comment">* alts[col][27] counts the number of coordinate</span></div>
<div class="line"><a id="l01003" name="l01003"></a><span class="lineno"> 1003</span><span class="comment">* representations of the chosen type for each column.</span></div>
<div class="line"><a id="l01004" name="l01004"></a><span class="lineno"> 1004</span><span class="comment">*</span></div>
<div class="line"><a id="l01005" name="l01005"></a><span class="lineno"> 1005</span><span class="comment">* For example, if there was no 'P' represention for</span></div>
<div class="line"><a id="l01006" name="l01006"></a><span class="lineno"> 1006</span><span class="comment">* column 13 then</span></div>
<div class="line"><a id="l01007" name="l01007"></a><span class="lineno"> 1007</span><span class="comment">*</span></div>
<div class="line"><a id="l01008" name="l01008"></a><span class="lineno"> 1008</span><span class="comment">= alts[13]['P'-'A'+1] == -1;</span></div>
<div class="line"><a id="l01009" name="l01009"></a><span class="lineno"> 1009</span><span class="comment">*</span></div>
<div class="line"><a id="l01010" name="l01010"></a><span class="lineno"> 1010</span><span class="comment">* Otherwise, the address of its wcsprm struct would be</span></div>
<div class="line"><a id="l01011" name="l01011"></a><span class="lineno"> 1011</span><span class="comment">*</span></div>
<div class="line"><a id="l01012" name="l01012"></a><span class="lineno"> 1012</span><span class="comment">= wcs + alts[13]['P'-'A'+1];</span></div>
<div class="line"><a id="l01013" name="l01013"></a><span class="lineno"> 1013</span><span class="comment">*</span></div>
<div class="line"><a id="l01014" name="l01014"></a><span class="lineno"> 1014</span><span class="comment">* Function return value:</span></div>
<div class="line"><a id="l01015" name="l01015"></a><span class="lineno"> 1015</span><span class="comment">* int Status return value:</span></div>
<div class="line"><a id="l01016" name="l01016"></a><span class="lineno"> 1016</span><span class="comment">* 0: Success.</span></div>
<div class="line"><a id="l01017" name="l01017"></a><span class="lineno"> 1017</span><span class="comment">* 1: Null wcsprm pointer passed.</span></div>
<div class="line"><a id="l01018" name="l01018"></a><span class="lineno"> 1018</span><span class="comment">*</span></div>
<div class="line"><a id="l01019" name="l01019"></a><span class="lineno"> 1019</span><span class="comment">*</span></div>
<div class="line"><a id="l01020" name="l01020"></a><span class="lineno"> 1020</span><span class="comment">* wcsvfree() - Free the array of wcsprm structs</span></div>
<div class="line"><a id="l01021" name="l01021"></a><span class="lineno"> 1021</span><span class="comment">* ---------------------------------------------</span></div>
<div class="line"><a id="l01022" name="l01022"></a><span class="lineno"> 1022</span><span class="comment">* wcsvfree() frees the memory allocated by wcspih() or wcsbth() for the array</span></div>
<div class="line"><a id="l01023" name="l01023"></a><span class="lineno"> 1023</span><span class="comment">* of wcsprm structs, first invoking wcsfree() on each of the array members.</span></div>
<div class="line"><a id="l01024" name="l01024"></a><span class="lineno"> 1024</span><span class="comment">*</span></div>
<div class="line"><a id="l01025" name="l01025"></a><span class="lineno"> 1025</span><span class="comment">* Given and returned:</span></div>
<div class="line"><a id="l01026" name="l01026"></a><span class="lineno"> 1026</span><span class="comment">* nwcs int* Number of coordinate representations found; set to 0</span></div>
<div class="line"><a id="l01027" name="l01027"></a><span class="lineno"> 1027</span><span class="comment">* on return.</span></div>
<div class="line"><a id="l01028" name="l01028"></a><span class="lineno"> 1028</span><span class="comment">*</span></div>
<div class="line"><a id="l01029" name="l01029"></a><span class="lineno"> 1029</span><span class="comment">* wcs struct wcsprm**</span></div>
<div class="line"><a id="l01030" name="l01030"></a><span class="lineno"> 1030</span><span class="comment">* Pointer to the array of wcsprm structs; set to 0x0 on</span></div>
<div class="line"><a id="l01031" name="l01031"></a><span class="lineno"> 1031</span><span class="comment">* return.</span></div>
<div class="line"><a id="l01032" name="l01032"></a><span class="lineno"> 1032</span><span class="comment">*</span></div>
<div class="line"><a id="l01033" name="l01033"></a><span class="lineno"> 1033</span><span class="comment">* Function return value:</span></div>
<div class="line"><a id="l01034" name="l01034"></a><span class="lineno"> 1034</span><span class="comment">* int Status return value:</span></div>
<div class="line"><a id="l01035" name="l01035"></a><span class="lineno"> 1035</span><span class="comment">* 0: Success.</span></div>
<div class="line"><a id="l01036" name="l01036"></a><span class="lineno"> 1036</span><span class="comment">* 1: Null wcsprm pointer passed.</span></div>
<div class="line"><a id="l01037" name="l01037"></a><span class="lineno"> 1037</span><span class="comment">*</span></div>
<div class="line"><a id="l01038" name="l01038"></a><span class="lineno"> 1038</span><span class="comment">*</span></div>
<div class="line"><a id="l01039" name="l01039"></a><span class="lineno"> 1039</span><span class="comment">* wcshdo() - Write out a wcsprm struct as a FITS header</span></div>
<div class="line"><a id="l01040" name="l01040"></a><span class="lineno"> 1040</span><span class="comment">* -----------------------------------------------------</span></div>
<div class="line"><a id="l01041" name="l01041"></a><span class="lineno"> 1041</span><span class="comment">* wcshdo() translates a wcsprm struct into a FITS header. If the colnum</span></div>
<div class="line"><a id="l01042" name="l01042"></a><span class="lineno"> 1042</span><span class="comment">* member of the struct is non-zero then a binary table image array header will</span></div>
<div class="line"><a id="l01043" name="l01043"></a><span class="lineno"> 1043</span><span class="comment">* be produced. Otherwise, if the colax[] member of the struct is set non-zero</span></div>
<div class="line"><a id="l01044" name="l01044"></a><span class="lineno"> 1044</span><span class="comment">* then a pixel list header will be produced. Otherwise, a primary image or</span></div>
<div class="line"><a id="l01045" name="l01045"></a><span class="lineno"> 1045</span><span class="comment">* image extension header will be produced.</span></div>
<div class="line"><a id="l01046" name="l01046"></a><span class="lineno"> 1046</span><span class="comment">*</span></div>
<div class="line"><a id="l01047" name="l01047"></a><span class="lineno"> 1047</span><span class="comment">* If the struct was originally constructed from a header, e.g. by wcspih(),</span></div>
<div class="line"><a id="l01048" name="l01048"></a><span class="lineno"> 1048</span><span class="comment">* the output header will almost certainly differ in a number of respects:</span></div>
<div class="line"><a id="l01049" name="l01049"></a><span class="lineno"> 1049</span><span class="comment">*</span></div>
<div class="line"><a id="l01050" name="l01050"></a><span class="lineno"> 1050</span><span class="comment">* - The output header only contains WCS-related keywords. In particular, it</span></div>
<div class="line"><a id="l01051" name="l01051"></a><span class="lineno"> 1051</span><span class="comment">* does not contain syntactically-required keywords such as SIMPLE, NAXIS,</span></div>
<div class="line"><a id="l01052" name="l01052"></a><span class="lineno"> 1052</span><span class="comment">* BITPIX, or END.</span></div>
<div class="line"><a id="l01053" name="l01053"></a><span class="lineno"> 1053</span><span class="comment">*</span></div>
<div class="line"><a id="l01054" name="l01054"></a><span class="lineno"> 1054</span><span class="comment">* - Elements of the PCi_ja matrix will be written if and only if they differ</span></div>
<div class="line"><a id="l01055" name="l01055"></a><span class="lineno"> 1055</span><span class="comment">* from the unit matrix. Thus, if the matrix is unity then no elements</span></div>
<div class="line"><a id="l01056" name="l01056"></a><span class="lineno"> 1056</span><span class="comment">* will be written.</span></div>
<div class="line"><a id="l01057" name="l01057"></a><span class="lineno"> 1057</span><span class="comment">*</span></div>
<div class="line"><a id="l01058" name="l01058"></a><span class="lineno"> 1058</span><span class="comment">* - The redundant keywords MJDREF, JDREF, JDREFI, JDREFF, all of which</span></div>
<div class="line"><a id="l01059" name="l01059"></a><span class="lineno"> 1059</span><span class="comment">* duplicate MJDREFI + MJDREFF, are never written. OBSGEO-[LBH] are not</span></div>
<div class="line"><a id="l01060" name="l01060"></a><span class="lineno"> 1060</span><span class="comment">* written if OBSGEO-[XYZ] are defined.</span></div>
<div class="line"><a id="l01061" name="l01061"></a><span class="lineno"> 1061</span><span class="comment">*</span></div>
<div class="line"><a id="l01062" name="l01062"></a><span class="lineno"> 1062</span><span class="comment">* - Deprecated (e.g. CROTAn, RESTFREQ, VELREF, RADECSYS, EPOCH, VSOURCEa) or</span></div>
<div class="line"><a id="l01063" name="l01063"></a><span class="lineno"> 1063</span><span class="comment">* non-standard usage will be translated to standard (this is partially</span></div>
<div class="line"><a id="l01064" name="l01064"></a><span class="lineno"> 1064</span><span class="comment">* dependent on whether wcsfix() was applied).</span></div>
<div class="line"><a id="l01065" name="l01065"></a><span class="lineno"> 1065</span><span class="comment">*</span></div>
<div class="line"><a id="l01066" name="l01066"></a><span class="lineno"> 1066</span><span class="comment">* - Additional keywords such as WCSAXESa, CUNITia, LONPOLEa and LATPOLEa may</span></div>
<div class="line"><a id="l01067" name="l01067"></a><span class="lineno"> 1067</span><span class="comment">* appear.</span></div>
<div class="line"><a id="l01068" name="l01068"></a><span class="lineno"> 1068</span><span class="comment">*</span></div>
<div class="line"><a id="l01069" name="l01069"></a><span class="lineno"> 1069</span><span class="comment">* - Quantities will be converted to the units used internally, basically SI</span></div>
<div class="line"><a id="l01070" name="l01070"></a><span class="lineno"> 1070</span><span class="comment">* with the addition of degrees.</span></div>
<div class="line"><a id="l01071" name="l01071"></a><span class="lineno"> 1071</span><span class="comment">*</span></div>
<div class="line"><a id="l01072" name="l01072"></a><span class="lineno"> 1072</span><span class="comment">* - Floating-point quantities may be given to a different decimal precision.</span></div>
<div class="line"><a id="l01073" name="l01073"></a><span class="lineno"> 1073</span><span class="comment">*</span></div>
<div class="line"><a id="l01074" name="l01074"></a><span class="lineno"> 1074</span><span class="comment">* - The original keycomments will be lost, although wcshdo() tries hard to</span></div>
<div class="line"><a id="l01075" name="l01075"></a><span class="lineno"> 1075</span><span class="comment">* write meaningful comments.</span></div>
<div class="line"><a id="l01076" name="l01076"></a><span class="lineno"> 1076</span><span class="comment">*</span></div>
<div class="line"><a id="l01077" name="l01077"></a><span class="lineno"> 1077</span><span class="comment">* - Keyword order will almost certainly be changed.</span></div>
<div class="line"><a id="l01078" name="l01078"></a><span class="lineno"> 1078</span><span class="comment">*</span></div>
<div class="line"><a id="l01079" name="l01079"></a><span class="lineno"> 1079</span><span class="comment">* Keywords can be translated between the image array, binary table, and pixel</span></div>
<div class="line"><a id="l01080" name="l01080"></a><span class="lineno"> 1080</span><span class="comment">* lists forms by manipulating the colnum or colax[] members of the wcsprm</span></div>
<div class="line"><a id="l01081" name="l01081"></a><span class="lineno"> 1081</span><span class="comment">* struct.</span></div>
<div class="line"><a id="l01082" name="l01082"></a><span class="lineno"> 1082</span><span class="comment">*</span></div>
<div class="line"><a id="l01083" name="l01083"></a><span class="lineno"> 1083</span><span class="comment">* Given:</span></div>
<div class="line"><a id="l01084" name="l01084"></a><span class="lineno"> 1084</span><span class="comment">* ctrl int Vector of flag bits that controls the degree of</span></div>
<div class="line"><a id="l01085" name="l01085"></a><span class="lineno"> 1085</span><span class="comment">* permissiveness in departing from the published WCS</span></div>
<div class="line"><a id="l01086" name="l01086"></a><span class="lineno"> 1086</span><span class="comment">* standard, and also controls the formatting of</span></div>
<div class="line"><a id="l01087" name="l01087"></a><span class="lineno"> 1087</span><span class="comment">* floating-point keyvalues. Set it to zero to get the</span></div>
<div class="line"><a id="l01088" name="l01088"></a><span class="lineno"> 1088</span><span class="comment">* default behaviour.</span></div>
<div class="line"><a id="l01089" name="l01089"></a><span class="lineno"> 1089</span><span class="comment">*</span></div>
<div class="line"><a id="l01090" name="l01090"></a><span class="lineno"> 1090</span><span class="comment">* Flag bits for the degree of permissiveness:</span></div>
<div class="line"><a id="l01091" name="l01091"></a><span class="lineno"> 1091</span><span class="comment">* WCSHDO_none: Recognize only FITS keywords defined by</span></div>
<div class="line"><a id="l01092" name="l01092"></a><span class="lineno"> 1092</span><span class="comment">* the published WCS standard.</span></div>
<div class="line"><a id="l01093" name="l01093"></a><span class="lineno"> 1093</span><span class="comment">* WCSHDO_all: Admit all recognized informal extensions</span></div>
<div class="line"><a id="l01094" name="l01094"></a><span class="lineno"> 1094</span><span class="comment">* of the WCS standard.</span></div>
<div class="line"><a id="l01095" name="l01095"></a><span class="lineno"> 1095</span><span class="comment">* Fine-grained control of the degree of permissiveness</span></div>
<div class="line"><a id="l01096" name="l01096"></a><span class="lineno"> 1096</span><span class="comment">* is also possible as explained in the notes below.</span></div>
<div class="line"><a id="l01097" name="l01097"></a><span class="lineno"> 1097</span><span class="comment">*</span></div>
<div class="line"><a id="l01098" name="l01098"></a><span class="lineno"> 1098</span><span class="comment">* As for controlling floating-point formatting, by</span></div>
<div class="line"><a id="l01099" name="l01099"></a><span class="lineno"> 1099</span><span class="comment">* default wcshdo() uses "%20.12G" for non-parameterized</span></div>
<div class="line"><a id="l01100" name="l01100"></a><span class="lineno"> 1100</span><span class="comment">* keywords such as LONPOLEa, and attempts to make the</span></div>
<div class="line"><a id="l01101" name="l01101"></a><span class="lineno"> 1101</span><span class="comment">* header more human-readable by using the same "%f"</span></div>
<div class="line"><a id="l01102" name="l01102"></a><span class="lineno"> 1102</span><span class="comment">* format for all values of each of the following</span></div>
<div class="line"><a id="l01103" name="l01103"></a><span class="lineno"> 1103</span><span class="comment">* parameterized keywords: CRPIXja, PCi_ja, and CDELTia</span></div>
<div class="line"><a id="l01104" name="l01104"></a><span class="lineno"> 1104</span><span class="comment">* (n.b. excluding CRVALia). Each has the same field</span></div>
<div class="line"><a id="l01105" name="l01105"></a><span class="lineno"> 1105</span><span class="comment">* width and precision so that the decimal points line</span></div>
<div class="line"><a id="l01106" name="l01106"></a><span class="lineno"> 1106</span><span class="comment">* up. The precision, allowing for up to 15 significant</span></div>
<div class="line"><a id="l01107" name="l01107"></a><span class="lineno"> 1107</span><span class="comment">* digits, is chosen so that there are no excess trailing</span></div>
<div class="line"><a id="l01108" name="l01108"></a><span class="lineno"> 1108</span><span class="comment">* zeroes. A similar formatting scheme applies by</span></div>
<div class="line"><a id="l01109" name="l01109"></a><span class="lineno"> 1109</span><span class="comment">* default for distortion function parameters.</span></div>
<div class="line"><a id="l01110" name="l01110"></a><span class="lineno"> 1110</span><span class="comment">*</span></div>
<div class="line"><a id="l01111" name="l01111"></a><span class="lineno"> 1111</span><span class="comment">* However, where the values of, for example, CDELTia</span></div>
<div class="line"><a id="l01112" name="l01112"></a><span class="lineno"> 1112</span><span class="comment">* differ by many orders of magnitude, the default</span></div>
<div class="line"><a id="l01113" name="l01113"></a><span class="lineno"> 1113</span><span class="comment">* formatting scheme may cause unacceptable loss of</span></div>
<div class="line"><a id="l01114" name="l01114"></a><span class="lineno"> 1114</span><span class="comment">* precision for the lower-valued keyvalues. Thus the</span></div>
<div class="line"><a id="l01115" name="l01115"></a><span class="lineno"> 1115</span><span class="comment">* default behaviour may be overridden:</span></div>
<div class="line"><a id="l01116" name="l01116"></a><span class="lineno"> 1116</span><span class="comment">* WCSHDO_P12: Use "%20.12G" format for all floating-</span></div>
<div class="line"><a id="l01117" name="l01117"></a><span class="lineno"> 1117</span><span class="comment">* point keyvalues (12 significant digits).</span></div>
<div class="line"><a id="l01118" name="l01118"></a><span class="lineno"> 1118</span><span class="comment">* WCSHDO_P13: Use "%21.13G" format for all floating-</span></div>
<div class="line"><a id="l01119" name="l01119"></a><span class="lineno"> 1119</span><span class="comment">* point keyvalues (13 significant digits).</span></div>
<div class="line"><a id="l01120" name="l01120"></a><span class="lineno"> 1120</span><span class="comment">* WCSHDO_P14: Use "%22.14G" format for all floating-</span></div>
<div class="line"><a id="l01121" name="l01121"></a><span class="lineno"> 1121</span><span class="comment">* point keyvalues (14 significant digits).</span></div>
<div class="line"><a id="l01122" name="l01122"></a><span class="lineno"> 1122</span><span class="comment">* WCSHDO_P15: Use "%23.15G" format for all floating-</span></div>
<div class="line"><a id="l01123" name="l01123"></a><span class="lineno"> 1123</span><span class="comment">* point keyvalues (15 significant digits).</span></div>
<div class="line"><a id="l01124" name="l01124"></a><span class="lineno"> 1124</span><span class="comment">* WCSHDO_P16: Use "%24.16G" format for all floating-</span></div>
<div class="line"><a id="l01125" name="l01125"></a><span class="lineno"> 1125</span><span class="comment">* point keyvalues (16 significant digits).</span></div>
<div class="line"><a id="l01126" name="l01126"></a><span class="lineno"> 1126</span><span class="comment">* WCSHDO_P17: Use "%25.17G" format for all floating-</span></div>
<div class="line"><a id="l01127" name="l01127"></a><span class="lineno"> 1127</span><span class="comment">* point keyvalues (17 significant digits).</span></div>
<div class="line"><a id="l01128" name="l01128"></a><span class="lineno"> 1128</span><span class="comment">* If more than one of the above flags are set, the</span></div>
<div class="line"><a id="l01129" name="l01129"></a><span class="lineno"> 1129</span><span class="comment">* highest number of significant digits prevails. In</span></div>
<div class="line"><a id="l01130" name="l01130"></a><span class="lineno"> 1130</span><span class="comment">* addition, there is an anciliary flag:</span></div>
<div class="line"><a id="l01131" name="l01131"></a><span class="lineno"> 1131</span><span class="comment">* WCSHDO_EFMT: Use "%E" format instead of the default</span></div>
<div class="line"><a id="l01132" name="l01132"></a><span class="lineno"> 1132</span><span class="comment">* "%G" format above.</span></div>
<div class="line"><a id="l01133" name="l01133"></a><span class="lineno"> 1133</span><span class="comment">* Note that excess trailing zeroes are stripped off the</span></div>
<div class="line"><a id="l01134" name="l01134"></a><span class="lineno"> 1134</span><span class="comment">* fractional part with "%G" (which never occurs with</span></div>
<div class="line"><a id="l01135" name="l01135"></a><span class="lineno"> 1135</span><span class="comment">* "%E"). Note also that the higher-precision options</span></div>
<div class="line"><a id="l01136" name="l01136"></a><span class="lineno"> 1136</span><span class="comment">* eat into the keycomment area. In this regard,</span></div>
<div class="line"><a id="l01137" name="l01137"></a><span class="lineno"> 1137</span><span class="comment">* WCSHDO_P14 causes minimal disruption with "%G" format,</span></div>
<div class="line"><a id="l01138" name="l01138"></a><span class="lineno"> 1138</span><span class="comment">* while WCSHDO_P13 is appropriate with "%E".</span></div>
<div class="line"><a id="l01139" name="l01139"></a><span class="lineno"> 1139</span><span class="comment">*</span></div>
<div class="line"><a id="l01140" name="l01140"></a><span class="lineno"> 1140</span><span class="comment">* Given and returned:</span></div>
<div class="line"><a id="l01141" name="l01141"></a><span class="lineno"> 1141</span><span class="comment">* wcs struct wcsprm*</span></div>
<div class="line"><a id="l01142" name="l01142"></a><span class="lineno"> 1142</span><span class="comment">* Pointer to a wcsprm struct containing coordinate</span></div>
<div class="line"><a id="l01143" name="l01143"></a><span class="lineno"> 1143</span><span class="comment">* transformation parameters. Will be initialized if</span></div>
<div class="line"><a id="l01144" name="l01144"></a><span class="lineno"> 1144</span><span class="comment">* necessary.</span></div>
<div class="line"><a id="l01145" name="l01145"></a><span class="lineno"> 1145</span><span class="comment">*</span></div>
<div class="line"><a id="l01146" name="l01146"></a><span class="lineno"> 1146</span><span class="comment">* Returned:</span></div>
<div class="line"><a id="l01147" name="l01147"></a><span class="lineno"> 1147</span><span class="comment">* nkeyrec int* Number of FITS header keyrecords returned in the</span></div>
<div class="line"><a id="l01148" name="l01148"></a><span class="lineno"> 1148</span><span class="comment">* "header" array.</span></div>
<div class="line"><a id="l01149" name="l01149"></a><span class="lineno"> 1149</span><span class="comment">*</span></div>
<div class="line"><a id="l01150" name="l01150"></a><span class="lineno"> 1150</span><span class="comment">* header char** Pointer to an array of char holding the header.</span></div>
<div class="line"><a id="l01151" name="l01151"></a><span class="lineno"> 1151</span><span class="comment">* Storage for the array is allocated by wcshdo() in</span></div>
<div class="line"><a id="l01152" name="l01152"></a><span class="lineno"> 1152</span><span class="comment">* blocks of 2880 bytes (32 x 80-character keyrecords)</span></div>
<div class="line"><a id="l01153" name="l01153"></a><span class="lineno"> 1153</span><span class="comment">* and must be freed by the user to avoid memory leaks.</span></div>
<div class="line"><a id="l01154" name="l01154"></a><span class="lineno"> 1154</span><span class="comment">* See wcsdealloc().</span></div>
<div class="line"><a id="l01155" name="l01155"></a><span class="lineno"> 1155</span><span class="comment">*</span></div>
<div class="line"><a id="l01156" name="l01156"></a><span class="lineno"> 1156</span><span class="comment">* Each keyrecord is 80 characters long and is *NOT*</span></div>
<div class="line"><a id="l01157" name="l01157"></a><span class="lineno"> 1157</span><span class="comment">* null-terminated, so the first keyrecord starts at</span></div>
<div class="line"><a id="l01158" name="l01158"></a><span class="lineno"> 1158</span><span class="comment">* (*header)[0], the second at (*header)[80], etc.</span></div>
<div class="line"><a id="l01159" name="l01159"></a><span class="lineno"> 1159</span><span class="comment">*</span></div>
<div class="line"><a id="l01160" name="l01160"></a><span class="lineno"> 1160</span><span class="comment">* Function return value:</span></div>
<div class="line"><a id="l01161" name="l01161"></a><span class="lineno"> 1161</span><span class="comment">* int Status return value (associated with wcs_errmsg[]):</span></div>
<div class="line"><a id="l01162" name="l01162"></a><span class="lineno"> 1162</span><span class="comment">* 0: Success.</span></div>
<div class="line"><a id="l01163" name="l01163"></a><span class="lineno"> 1163</span><span class="comment">* 1: Null wcsprm pointer passed.</span></div>
<div class="line"><a id="l01164" name="l01164"></a><span class="lineno"> 1164</span><span class="comment">* 2: Memory allocation failed.</span></div>
<div class="line"><a id="l01165" name="l01165"></a><span class="lineno"> 1165</span><span class="comment">* 3: Linear transformation matrix is singular.</span></div>
<div class="line"><a id="l01166" name="l01166"></a><span class="lineno"> 1166</span><span class="comment">* 4: Inconsistent or unrecognized coordinate axis</span></div>
<div class="line"><a id="l01167" name="l01167"></a><span class="lineno"> 1167</span><span class="comment">* types.</span></div>
<div class="line"><a id="l01168" name="l01168"></a><span class="lineno"> 1168</span><span class="comment">* 5: Invalid parameter value.</span></div>
<div class="line"><a id="l01169" name="l01169"></a><span class="lineno"> 1169</span><span class="comment">* 6: Invalid coordinate transformation parameters.</span></div>
<div class="line"><a id="l01170" name="l01170"></a><span class="lineno"> 1170</span><span class="comment">* 7: Ill-conditioned coordinate transformation</span></div>
<div class="line"><a id="l01171" name="l01171"></a><span class="lineno"> 1171</span><span class="comment">* parameters.</span></div>
<div class="line"><a id="l01172" name="l01172"></a><span class="lineno"> 1172</span><span class="comment">*</span></div>
<div class="line"><a id="l01173" name="l01173"></a><span class="lineno"> 1173</span><span class="comment">* For returns > 1, a detailed error message is set in</span></div>
<div class="line"><a id="l01174" name="l01174"></a><span class="lineno"> 1174</span><span class="comment">* wcsprm::err if enabled, see wcserr_enable().</span></div>
<div class="line"><a id="l01175" name="l01175"></a><span class="lineno"> 1175</span><span class="comment">*</span></div>
<div class="line"><a id="l01176" name="l01176"></a><span class="lineno"> 1176</span><span class="comment">* Notes:</span></div>
<div class="line"><a id="l01177" name="l01177"></a><span class="lineno"> 1177</span><span class="comment">* 1: wcshdo() interprets the "relax" argument as a vector of flag bits to</span></div>
<div class="line"><a id="l01178" name="l01178"></a><span class="lineno"> 1178</span><span class="comment">* provide fine-grained control over what non-standard WCS keywords to</span></div>
<div class="line"><a id="l01179" name="l01179"></a><span class="lineno"> 1179</span><span class="comment">* write. The flag bits are subject to change in future and should be set</span></div>
<div class="line"><a id="l01180" name="l01180"></a><span class="lineno"> 1180</span><span class="comment">* by using the preprocessor macros (see below) for the purpose.</span></div>
<div class="line"><a id="l01181" name="l01181"></a><span class="lineno"> 1181</span><span class="comment">*</span></div>
<div class="line"><a id="l01182" name="l01182"></a><span class="lineno"> 1182</span><span class="comment">* - WCSHDO_none: Don't use any extensions.</span></div>
<div class="line"><a id="l01183" name="l01183"></a><span class="lineno"> 1183</span><span class="comment">*</span></div>
<div class="line"><a id="l01184" name="l01184"></a><span class="lineno"> 1184</span><span class="comment">* - WCSHDO_all: Write all recognized extensions, equivalent to setting</span></div>
<div class="line"><a id="l01185" name="l01185"></a><span class="lineno"> 1185</span><span class="comment">* each flag bit.</span></div>
<div class="line"><a id="l01186" name="l01186"></a><span class="lineno"> 1186</span><span class="comment">*</span></div>
<div class="line"><a id="l01187" name="l01187"></a><span class="lineno"> 1187</span><span class="comment">* - WCSHDO_safe: Write all extensions that are considered to be safe and</span></div>
<div class="line"><a id="l01188" name="l01188"></a><span class="lineno"> 1188</span><span class="comment">* recommended.</span></div>
<div class="line"><a id="l01189" name="l01189"></a><span class="lineno"> 1189</span><span class="comment">*</span></div>
<div class="line"><a id="l01190" name="l01190"></a><span class="lineno"> 1190</span><span class="comment">* - WCSHDO_DOBSn: Write DOBSn, the column-specific analogue of DATE-OBS</span></div>
<div class="line"><a id="l01191" name="l01191"></a><span class="lineno"> 1191</span><span class="comment">* for use in binary tables and pixel lists. WCS Paper III</span></div>
<div class="line"><a id="l01192" name="l01192"></a><span class="lineno"> 1192</span><span class="comment">* introduced DATE-AVG and DAVGn but by an oversight DOBSn (the</span></div>
<div class="line"><a id="l01193" name="l01193"></a><span class="lineno"> 1193</span><span class="comment">* obvious analogy) was never formally defined by the standard.</span></div>
<div class="line"><a id="l01194" name="l01194"></a><span class="lineno"> 1194</span><span class="comment">* The alternative to using DOBSn is to write DATE-OBS which</span></div>
<div class="line"><a id="l01195" name="l01195"></a><span class="lineno"> 1195</span><span class="comment">* applies to the whole table. This usage is considered to be</span></div>
<div class="line"><a id="l01196" name="l01196"></a><span class="lineno"> 1196</span><span class="comment">* safe and is recommended.</span></div>
<div class="line"><a id="l01197" name="l01197"></a><span class="lineno"> 1197</span><span class="comment">*</span></div>
<div class="line"><a id="l01198" name="l01198"></a><span class="lineno"> 1198</span><span class="comment">* - WCSHDO_TPCn_ka: WCS Paper I defined</span></div>
<div class="line"><a id="l01199" name="l01199"></a><span class="lineno"> 1199</span><span class="comment">*</span></div>
<div class="line"><a id="l01200" name="l01200"></a><span class="lineno"> 1200</span><span class="comment">* - TPn_ka and TCn_ka for pixel lists</span></div>
<div class="line"><a id="l01201" name="l01201"></a><span class="lineno"> 1201</span><span class="comment">*</span></div>
<div class="line"><a id="l01202" name="l01202"></a><span class="lineno"> 1202</span><span class="comment">* but WCS Paper II uses TPCn_ka in one example and subsequently</span></div>
<div class="line"><a id="l01203" name="l01203"></a><span class="lineno"> 1203</span><span class="comment">* the errata for the WCS papers legitimized the use of</span></div>
<div class="line"><a id="l01204" name="l01204"></a><span class="lineno"> 1204</span><span class="comment">*</span></div>
<div class="line"><a id="l01205" name="l01205"></a><span class="lineno"> 1205</span><span class="comment">* - TPCn_ka and TCDn_ka for pixel lists</span></div>
<div class="line"><a id="l01206" name="l01206"></a><span class="lineno"> 1206</span><span class="comment">*</span></div>
<div class="line"><a id="l01207" name="l01207"></a><span class="lineno"> 1207</span><span class="comment">* provided that the keyword does not exceed eight characters.</span></div>
<div class="line"><a id="l01208" name="l01208"></a><span class="lineno"> 1208</span><span class="comment">* This usage is considered to be safe and is recommended because</span></div>
<div class="line"><a id="l01209" name="l01209"></a><span class="lineno"> 1209</span><span class="comment">* of the non-mnemonic terseness of the shorter forms.</span></div>
<div class="line"><a id="l01210" name="l01210"></a><span class="lineno"> 1210</span><span class="comment">*</span></div>
<div class="line"><a id="l01211" name="l01211"></a><span class="lineno"> 1211</span><span class="comment">* - WCSHDO_PVn_ma: WCS Paper I defined</span></div>
<div class="line"><a id="l01212" name="l01212"></a><span class="lineno"> 1212</span><span class="comment">*</span></div>
<div class="line"><a id="l01213" name="l01213"></a><span class="lineno"> 1213</span><span class="comment">* - iVn_ma and iSn_ma for bintables and</span></div>
<div class="line"><a id="l01214" name="l01214"></a><span class="lineno"> 1214</span><span class="comment">* - TVn_ma and TSn_ma for pixel lists</span></div>
<div class="line"><a id="l01215" name="l01215"></a><span class="lineno"> 1215</span><span class="comment">*</span></div>
<div class="line"><a id="l01216" name="l01216"></a><span class="lineno"> 1216</span><span class="comment">* but WCS Paper II uses iPVn_ma and TPVn_ma in the examples and</span></div>
<div class="line"><a id="l01217" name="l01217"></a><span class="lineno"> 1217</span><span class="comment">* subsequently the errata for the WCS papers legitimized the use</span></div>
<div class="line"><a id="l01218" name="l01218"></a><span class="lineno"> 1218</span><span class="comment">* of</span></div>
<div class="line"><a id="l01219" name="l01219"></a><span class="lineno"> 1219</span><span class="comment">*</span></div>
<div class="line"><a id="l01220" name="l01220"></a><span class="lineno"> 1220</span><span class="comment">* - iPVn_ma and iPSn_ma for bintables and</span></div>
<div class="line"><a id="l01221" name="l01221"></a><span class="lineno"> 1221</span><span class="comment">* - TPVn_ma and TPSn_ma for pixel lists</span></div>
<div class="line"><a id="l01222" name="l01222"></a><span class="lineno"> 1222</span><span class="comment">*</span></div>
<div class="line"><a id="l01223" name="l01223"></a><span class="lineno"> 1223</span><span class="comment">* provided that the keyword does not exceed eight characters.</span></div>
<div class="line"><a id="l01224" name="l01224"></a><span class="lineno"> 1224</span><span class="comment">* This usage is considered to be safe and is recommended because</span></div>
<div class="line"><a id="l01225" name="l01225"></a><span class="lineno"> 1225</span><span class="comment">* of the non-mnemonic terseness of the shorter forms.</span></div>
<div class="line"><a id="l01226" name="l01226"></a><span class="lineno"> 1226</span><span class="comment">*</span></div>
<div class="line"><a id="l01227" name="l01227"></a><span class="lineno"> 1227</span><span class="comment">* - WCSHDO_CRPXna: For historical reasons WCS Paper I defined</span></div>
<div class="line"><a id="l01228" name="l01228"></a><span class="lineno"> 1228</span><span class="comment">*</span></div>
<div class="line"><a id="l01229" name="l01229"></a><span class="lineno"> 1229</span><span class="comment">* - jCRPXn, iCDLTn, iCUNIn, iCTYPn, and iCRVLn for bintables and</span></div>
<div class="line"><a id="l01230" name="l01230"></a><span class="lineno"> 1230</span><span class="comment">* - TCRPXn, TCDLTn, TCUNIn, TCTYPn, and TCRVLn for pixel lists</span></div>
<div class="line"><a id="l01231" name="l01231"></a><span class="lineno"> 1231</span><span class="comment">*</span></div>
<div class="line"><a id="l01232" name="l01232"></a><span class="lineno"> 1232</span><span class="comment">* for use without an alternate version specifier. However,</span></div>
<div class="line"><a id="l01233" name="l01233"></a><span class="lineno"> 1233</span><span class="comment">* because of the eight-character keyword constraint, in order to</span></div>
<div class="line"><a id="l01234" name="l01234"></a><span class="lineno"> 1234</span><span class="comment">* accommodate column numbers greater than 99 WCS Paper I also</span></div>
<div class="line"><a id="l01235" name="l01235"></a><span class="lineno"> 1235</span><span class="comment">* defined</span></div>
<div class="line"><a id="l01236" name="l01236"></a><span class="lineno"> 1236</span><span class="comment">*</span></div>
<div class="line"><a id="l01237" name="l01237"></a><span class="lineno"> 1237</span><span class="comment">* - jCRPna, iCDEna, iCUNna, iCTYna and iCRVna for bintables and</span></div>
<div class="line"><a id="l01238" name="l01238"></a><span class="lineno"> 1238</span><span class="comment">* - TCRPna, TCDEna, TCUNna, TCTYna and TCRVna for pixel lists</span></div>
<div class="line"><a id="l01239" name="l01239"></a><span class="lineno"> 1239</span><span class="comment">*</span></div>
<div class="line"><a id="l01240" name="l01240"></a><span class="lineno"> 1240</span><span class="comment">* for use with an alternate version specifier (the "a"). Like</span></div>
<div class="line"><a id="l01241" name="l01241"></a><span class="lineno"> 1241</span><span class="comment">* the PC, CD, PV, and PS keywords there is an obvious tendency to</span></div>
<div class="line"><a id="l01242" name="l01242"></a><span class="lineno"> 1242</span><span class="comment">* confuse these two forms for column numbers up to 99. It is</span></div>
<div class="line"><a id="l01243" name="l01243"></a><span class="lineno"> 1243</span><span class="comment">* very unlikely that any parser would reject keywords in the</span></div>
<div class="line"><a id="l01244" name="l01244"></a><span class="lineno"> 1244</span><span class="comment">* first set with a non-blank alternate version specifier so this</span></div>
<div class="line"><a id="l01245" name="l01245"></a><span class="lineno"> 1245</span><span class="comment">* usage is considered to be safe and is recommended.</span></div>
<div class="line"><a id="l01246" name="l01246"></a><span class="lineno"> 1246</span><span class="comment">*</span></div>
<div class="line"><a id="l01247" name="l01247"></a><span class="lineno"> 1247</span><span class="comment">* - WCSHDO_CNAMna: WCS Papers I and III defined</span></div>
<div class="line"><a id="l01248" name="l01248"></a><span class="lineno"> 1248</span><span class="comment">*</span></div>
<div class="line"><a id="l01249" name="l01249"></a><span class="lineno"> 1249</span><span class="comment">* - iCNAna, iCRDna, and iCSYna for bintables and</span></div>
<div class="line"><a id="l01250" name="l01250"></a><span class="lineno"> 1250</span><span class="comment">* - TCNAna, TCRDna, and TCSYna for pixel lists</span></div>
<div class="line"><a id="l01251" name="l01251"></a><span class="lineno"> 1251</span><span class="comment">*</span></div>
<div class="line"><a id="l01252" name="l01252"></a><span class="lineno"> 1252</span><span class="comment">* By analogy with the above, the long forms would be</span></div>
<div class="line"><a id="l01253" name="l01253"></a><span class="lineno"> 1253</span><span class="comment">*</span></div>
<div class="line"><a id="l01254" name="l01254"></a><span class="lineno"> 1254</span><span class="comment">* - iCNAMna, iCRDEna, and iCSYEna for bintables and</span></div>
<div class="line"><a id="l01255" name="l01255"></a><span class="lineno"> 1255</span><span class="comment">* - TCNAMna, TCRDEna, and TCSYEna for pixel lists</span></div>
<div class="line"><a id="l01256" name="l01256"></a><span class="lineno"> 1256</span><span class="comment">*</span></div>
<div class="line"><a id="l01257" name="l01257"></a><span class="lineno"> 1257</span><span class="comment">* Note that these keywords provide auxiliary information only,</span></div>
<div class="line"><a id="l01258" name="l01258"></a><span class="lineno"> 1258</span><span class="comment">* none of them are needed to compute world coordinates. This</span></div>
<div class="line"><a id="l01259" name="l01259"></a><span class="lineno"> 1259</span><span class="comment">* usage is potentially unsafe and is not recommended at this</span></div>
<div class="line"><a id="l01260" name="l01260"></a><span class="lineno"> 1260</span><span class="comment">* time.</span></div>
<div class="line"><a id="l01261" name="l01261"></a><span class="lineno"> 1261</span><span class="comment">*</span></div>
<div class="line"><a id="l01262" name="l01262"></a><span class="lineno"> 1262</span><span class="comment">* - WCSHDO_WCSNna: In light of wcsbth() note 4, write WCSNna instead of</span></div>
<div class="line"><a id="l01263" name="l01263"></a><span class="lineno"> 1263</span><span class="comment">* TWCSna for pixel lists. While wcsbth() treats WCSNna and</span></div>
<div class="line"><a id="l01264" name="l01264"></a><span class="lineno"> 1264</span><span class="comment">* TWCSna as equivalent, other parsers may not. Consequently,</span></div>
<div class="line"><a id="l01265" name="l01265"></a><span class="lineno"> 1265</span><span class="comment">* this usage is potentially unsafe and is not recommended at this</span></div>
<div class="line"><a id="l01266" name="l01266"></a><span class="lineno"> 1266</span><span class="comment">* time.</span></div>
<div class="line"><a id="l01267" name="l01267"></a><span class="lineno"> 1267</span><span class="comment">*</span></div>
<div class="line"><a id="l01268" name="l01268"></a><span class="lineno"> 1268</span><span class="comment">*</span></div>
<div class="line"><a id="l01269" name="l01269"></a><span class="lineno"> 1269</span><span class="comment">* Global variable: const char *wcshdr_errmsg[] - Status return messages</span></div>
<div class="line"><a id="l01270" name="l01270"></a><span class="lineno"> 1270</span><span class="comment">* ---------------------------------------------------------------------</span></div>
<div class="line"><a id="l01271" name="l01271"></a><span class="lineno"> 1271</span><span class="comment">* Error messages to match the status value returned from each function.</span></div>
<div class="line"><a id="l01272" name="l01272"></a><span class="lineno"> 1272</span><span class="comment">* Use wcs_errmsg[] for status returns from wcshdo().</span></div>
<div class="line"><a id="l01273" name="l01273"></a><span class="lineno"> 1273</span><span class="comment">*</span></div>
<div class="line"><a id="l01274" name="l01274"></a><span class="lineno"> 1274</span><span class="comment">*===========================================================================*/</span></div>
<div class="line"><a id="l01275" name="l01275"></a><span class="lineno"> 1275</span> </div>
<div class="line"><a id="l01276" name="l01276"></a><span class="lineno"> 1276</span><span class="preprocessor">#ifndef WCSLIB_WCSHDR</span></div>
<div class="line"><a id="l01277" name="l01277"></a><span class="lineno"> 1277</span><span class="preprocessor">#define WCSLIB_WCSHDR</span></div>
<div class="line"><a id="l01278" name="l01278"></a><span class="lineno"> 1278</span> </div>
<div class="line"><a id="l01279" name="l01279"></a><span class="lineno"> 1279</span><span class="preprocessor">#include "<a class="code" href="wcs_8h.html">wcs.h</a>"</span></div>
<div class="line"><a id="l01280" name="l01280"></a><span class="lineno"> 1280</span> </div>
<div class="line"><a id="l01281" name="l01281"></a><span class="lineno"> 1281</span><span class="preprocessor">#ifdef __cplusplus</span></div>
<div class="line"><a id="l01282" name="l01282"></a><span class="lineno"> 1282</span><span class="keyword">extern</span> <span class="stringliteral">"C"</span> {</div>
<div class="line"><a id="l01283" name="l01283"></a><span class="lineno"> 1283</span><span class="preprocessor">#endif</span></div>
<div class="line"><a id="l01284" name="l01284"></a><span class="lineno"> 1284</span> </div>
<div class="line"><a id="l01285" name="l01285"></a><span class="lineno"><a class="line" href="wcshdr_8h.html#a92a0007f672a5498ab1b6ccc6a4a002b"> 1285</a></span><span class="preprocessor">#define WCSHDR_none 0x00000000</span></div>
<div class="line"><a id="l01286" name="l01286"></a><span class="lineno"><a class="line" href="wcshdr_8h.html#a0b9b53e5cfd05653cbca75cf1aa8b2ed"> 1286</a></span><span class="preprocessor">#define WCSHDR_all 0x000FFFFF</span></div>
<div class="line"><a id="l01287" name="l01287"></a><span class="lineno"><a class="line" href="wcshdr_8h.html#afd6d52bed79bd48230f651ac48eb5ca6"> 1287</a></span><span class="preprocessor">#define WCSHDR_reject 0x10000000</span></div>
<div class="line"><a id="l01288" name="l01288"></a><span class="lineno"><a class="line" href="wcshdr_8h.html#a7b0e2f1a88e02909ea6366d3a18d6a84"> 1288</a></span><span class="preprocessor">#define WCSHDR_strict 0x20000000</span></div>
<div class="line"><a id="l01289" name="l01289"></a><span class="lineno"> 1289</span> </div>
<div class="line"><a id="l01290" name="l01290"></a><span class="lineno"><a class="line" href="wcshdr_8h.html#a017f1e817bdb2114ba765e7a9ef73bac"> 1290</a></span><span class="preprocessor">#define WCSHDR_CROTAia 0x00000001</span></div>
<div class="line"><a id="l01291" name="l01291"></a><span class="lineno"><a class="line" href="wcshdr_8h.html#afc0a5a6b475a8e50b77d4be099790985"> 1291</a></span><span class="preprocessor">#define WCSHDR_VELREFa 0x00000002</span></div>
<div class="line"><a id="l01292" name="l01292"></a><span class="lineno"><a class="line" href="wcshdr_8h.html#a63eb554461f3df5dc64a25f71891b9f1"> 1292</a></span><span class="preprocessor">#define WCSHDR_CD00i00j 0x00000004</span></div>
<div class="line"><a id="l01293" name="l01293"></a><span class="lineno"><a class="line" href="wcshdr_8h.html#a3dea9d7548bdbc9a7cc8d0a04cdd46fb"> 1293</a></span><span class="preprocessor">#define WCSHDR_PC00i00j 0x00000008</span></div>
<div class="line"><a id="l01294" name="l01294"></a><span class="lineno"><a class="line" href="wcshdr_8h.html#aee4fe41274945f9e34009d2eb309c922"> 1294</a></span><span class="preprocessor">#define WCSHDR_PROJPn 0x00000010</span></div>
<div class="line"><a id="l01295" name="l01295"></a><span class="lineno"><a class="line" href="wcshdr_8h.html#a859baeb46a09ce21b6dbff40fe6c8f4a"> 1295</a></span><span class="preprocessor">#define WCSHDR_CD0i_0ja 0x00000020</span></div>
<div class="line"><a id="l01296" name="l01296"></a><span class="lineno"><a class="line" href="wcshdr_8h.html#aa2e6d72be227da4c8c7d6d47a7274e59"> 1296</a></span><span class="preprocessor">#define WCSHDR_PC0i_0ja 0x00000040</span></div>
<div class="line"><a id="l01297" name="l01297"></a><span class="lineno"><a class="line" href="wcshdr_8h.html#af84f778ea111ae655505a1899a06b063"> 1297</a></span><span class="preprocessor">#define WCSHDR_PV0i_0ma 0x00000080</span></div>
<div class="line"><a id="l01298" name="l01298"></a><span class="lineno"><a class="line" href="wcshdr_8h.html#ae695c1dc3fb7785cdaa24e2fcc906074"> 1298</a></span><span class="preprocessor">#define WCSHDR_PS0i_0ma 0x00000100</span></div>
<div class="line"><a id="l01299" name="l01299"></a><span class="lineno"><a class="line" href="wcshdr_8h.html#adff9a101a373a634f3a1baab29e92534"> 1299</a></span><span class="preprocessor">#define WCSHDR_DOBSn 0x00000200</span></div>
<div class="line"><a id="l01300" name="l01300"></a><span class="lineno"><a class="line" href="wcshdr_8h.html#a62a540f9f200f21c31482fe171da10d4"> 1300</a></span><span class="preprocessor">#define WCSHDR_OBSGLBHn 0x00000400</span></div>
<div class="line"><a id="l01301" name="l01301"></a><span class="lineno"><a class="line" href="wcshdr_8h.html#a1d506ef2ad493a963426e0732a6328ca"> 1301</a></span><span class="preprocessor">#define WCSHDR_RADECSYS 0x00000800</span></div>
<div class="line"><a id="l01302" name="l01302"></a><span class="lineno"><a class="line" href="wcshdr_8h.html#a5feeef18919b1cbb79729bbfa75976ec"> 1302</a></span><span class="preprocessor">#define WCSHDR_EPOCHa 0x00001000</span></div>
<div class="line"><a id="l01303" name="l01303"></a><span class="lineno"><a class="line" href="wcshdr_8h.html#a1b66d50d7f1927222a170bc88f9db51e"> 1303</a></span><span class="preprocessor">#define WCSHDR_VSOURCE 0x00002000</span></div>
<div class="line"><a id="l01304" name="l01304"></a><span class="lineno"><a class="line" href="wcshdr_8h.html#a9c8544530fe4846eb815275d9536c802"> 1304</a></span><span class="preprocessor">#define WCSHDR_DATEREF 0x00004000</span></div>
<div class="line"><a id="l01305" name="l01305"></a><span class="lineno"><a class="line" href="wcshdr_8h.html#ae8a768f544fe3ae81436b73dca3099fb"> 1305</a></span><span class="preprocessor">#define WCSHDR_LONGKEY 0x00008000</span></div>
<div class="line"><a id="l01306" name="l01306"></a><span class="lineno"><a class="line" href="wcshdr_8h.html#adf57a609a5c3f7288452cce86210260e"> 1306</a></span><span class="preprocessor">#define WCSHDR_CNAMn 0x00010000</span></div>
<div class="line"><a id="l01307" name="l01307"></a><span class="lineno"><a class="line" href="wcshdr_8h.html#a0e8eb873389e9c15bd6079a96c41ad60"> 1307</a></span><span class="preprocessor">#define WCSHDR_AUXIMG 0x00020000</span></div>
<div class="line"><a id="l01308" name="l01308"></a><span class="lineno"><a class="line" href="wcshdr_8h.html#a33d67fd81c52448aead9e09f32ba9cca"> 1308</a></span><span class="preprocessor">#define WCSHDR_ALLIMG 0x00040000</span></div>
<div class="line"><a id="l01309" name="l01309"></a><span class="lineno"> 1309</span> </div>
<div class="line"><a id="l01310" name="l01310"></a><span class="lineno"><a class="line" href="wcshdr_8h.html#ab65e929c7d525d735ae240046d4f0d9c"> 1310</a></span><span class="preprocessor">#define WCSHDR_IMGHEAD 0x00100000</span></div>
<div class="line"><a id="l01311" name="l01311"></a><span class="lineno"><a class="line" href="wcshdr_8h.html#aa7c5021293b0db20ece0e82c3702a159"> 1311</a></span><span class="preprocessor">#define WCSHDR_BIMGARR 0x00200000</span></div>
<div class="line"><a id="l01312" name="l01312"></a><span class="lineno"><a class="line" href="wcshdr_8h.html#a7bf13ab87b23ecdbbb4b4847d4944070"> 1312</a></span><span class="preprocessor">#define WCSHDR_PIXLIST 0x00400000</span></div>
<div class="line"><a id="l01313" name="l01313"></a><span class="lineno"> 1313</span> </div>
<div class="line"><a id="l01314" name="l01314"></a><span class="lineno"><a class="line" href="wcshdr_8h.html#a54634ed49425e8842874e9e2b77899df"> 1314</a></span><span class="preprocessor">#define WCSHDO_none 0x00000</span></div>
<div class="line"><a id="l01315" name="l01315"></a><span class="lineno"><a class="line" href="wcshdr_8h.html#a5592649ee4c25e118559c6d283c51930"> 1315</a></span><span class="preprocessor">#define WCSHDO_all 0x000FF</span></div>
<div class="line"><a id="l01316" name="l01316"></a><span class="lineno"><a class="line" href="wcshdr_8h.html#a446914676e0b3f55ac6a080015a52b43"> 1316</a></span><span class="preprocessor">#define WCSHDO_safe 0x0000F</span></div>
<div class="line"><a id="l01317" name="l01317"></a><span class="lineno"><a class="line" href="wcshdr_8h.html#a6779d48001260a0011b3dcffdcb64cb6"> 1317</a></span><span class="preprocessor">#define WCSHDO_DOBSn 0x00001</span></div>
<div class="line"><a id="l01318" name="l01318"></a><span class="lineno"><a class="line" href="wcshdr_8h.html#a96b787f84207faa42599e50e6e078d21"> 1318</a></span><span class="preprocessor">#define WCSHDO_TPCn_ka 0x00002</span></div>
<div class="line"><a id="l01319" name="l01319"></a><span class="lineno"><a class="line" href="wcshdr_8h.html#a222a5bd7659f3e1ea1a9ed21f54c50ef"> 1319</a></span><span class="preprocessor">#define WCSHDO_PVn_ma 0x00004</span></div>
<div class="line"><a id="l01320" name="l01320"></a><span class="lineno"><a class="line" href="wcshdr_8h.html#aace96fb8c1499616dd1333af3e8340b0"> 1320</a></span><span class="preprocessor">#define WCSHDO_CRPXna 0x00008</span></div>
<div class="line"><a id="l01321" name="l01321"></a><span class="lineno"><a class="line" href="wcshdr_8h.html#a95325b53ebd8d7d0a371a65b27b3d04a"> 1321</a></span><span class="preprocessor">#define WCSHDO_CNAMna 0x00010</span></div>
<div class="line"><a id="l01322" name="l01322"></a><span class="lineno"><a class="line" href="wcshdr_8h.html#a9a70ad2a355a9736711d8017535bf72b"> 1322</a></span><span class="preprocessor">#define WCSHDO_WCSNna 0x00020</span></div>
<div class="line"><a id="l01323" name="l01323"></a><span class="lineno"><a class="line" href="wcshdr_8h.html#abcaa3317d8d1ff2639ab1cbb07eec9b8"> 1323</a></span><span class="preprocessor">#define WCSHDO_P12 0x01000</span></div>
<div class="line"><a id="l01324" name="l01324"></a><span class="lineno"><a class="line" href="wcshdr_8h.html#a8cf047d726c61673c20ee0324fef9969"> 1324</a></span><span class="preprocessor">#define WCSHDO_P13 0x02000</span></div>
<div class="line"><a id="l01325" name="l01325"></a><span class="lineno"><a class="line" href="wcshdr_8h.html#aa94c6c4567c9d40b052d6530bd8d54c2"> 1325</a></span><span class="preprocessor">#define WCSHDO_P14 0x04000</span></div>
<div class="line"><a id="l01326" name="l01326"></a><span class="lineno"><a class="line" href="wcshdr_8h.html#ac395c70f762793f4e9f1aaec6ade3cec"> 1326</a></span><span class="preprocessor">#define WCSHDO_P15 0x08000</span></div>
<div class="line"><a id="l01327" name="l01327"></a><span class="lineno"><a class="line" href="wcshdr_8h.html#a01513b3c36299fe68ff09e123c1d5bdc"> 1327</a></span><span class="preprocessor">#define WCSHDO_P16 0x10000</span></div>
<div class="line"><a id="l01328" name="l01328"></a><span class="lineno"><a class="line" href="wcshdr_8h.html#add38788ba2d158972bd85a1c659d2d31"> 1328</a></span><span class="preprocessor">#define WCSHDO_P17 0x20000</span></div>
<div class="line"><a id="l01329" name="l01329"></a><span class="lineno"><a class="line" href="wcshdr_8h.html#ac44fe1ac8893e23217863efa82ff789a"> 1329</a></span><span class="preprocessor">#define WCSHDO_EFMT 0x40000</span></div>
<div class="line"><a id="l01330" name="l01330"></a><span class="lineno"> 1330</span> </div>
<div class="line"><a id="l01331" name="l01331"></a><span class="lineno"> 1331</span> </div>
<div class="line"><a id="l01332" name="l01332"></a><span class="lineno"> 1332</span><span class="keyword">extern</span> <span class="keyword">const</span> <span class="keywordtype">char</span> *<a class="code hl_variable" href="wcshdr_8h.html#a06cd9297f8315235ba1cf13d1cc115e1">wcshdr_errmsg</a>[];</div>
<div class="line"><a id="l01333" name="l01333"></a><span class="lineno"> 1333</span> </div>
<div class="foldopen" id="foldopen01334" data-start="{" data-end="};">
<div class="line"><a id="l01334" name="l01334"></a><span class="lineno"><a class="line" href="wcshdr_8h.html#ae2dfc36c150d3a16a5e83131d32ecdae"> 1334</a></span><span class="keyword">enum</span> <a class="code hl_enumeration" href="wcshdr_8h.html#ae2dfc36c150d3a16a5e83131d32ecdae">wcshdr_errmsg_enum</a> {</div>
<div class="line"><a id="l01335" name="l01335"></a><span class="lineno"><a class="line" href="wcshdr_8h.html#ae2dfc36c150d3a16a5e83131d32ecdaeabfe69dd9e4c486f856a5dc44b02e79a1"> 1335</a></span> <a class="code hl_enumvalue" href="wcshdr_8h.html#ae2dfc36c150d3a16a5e83131d32ecdaeabfe69dd9e4c486f856a5dc44b02e79a1">WCSHDRERR_SUCCESS</a> = 0, <span class="comment">// Success.</span></div>
<div class="line"><a id="l01336" name="l01336"></a><span class="lineno"><a class="line" href="wcshdr_8h.html#ae2dfc36c150d3a16a5e83131d32ecdaea99dd31e274ec97542e650ff89357cded"> 1336</a></span> <a class="code hl_enumvalue" href="wcshdr_8h.html#ae2dfc36c150d3a16a5e83131d32ecdaea99dd31e274ec97542e650ff89357cded">WCSHDRERR_NULL_POINTER</a> = 1, <span class="comment">// Null wcsprm pointer passed.</span></div>
<div class="line"><a id="l01337" name="l01337"></a><span class="lineno"><a class="line" href="wcshdr_8h.html#ae2dfc36c150d3a16a5e83131d32ecdaea0a858638ef0dd0dc9b529f98b14cc46f"> 1337</a></span> <a class="code hl_enumvalue" href="wcshdr_8h.html#ae2dfc36c150d3a16a5e83131d32ecdaea0a858638ef0dd0dc9b529f98b14cc46f">WCSHDRERR_MEMORY</a> = 2, <span class="comment">// Memory allocation failed.</span></div>
<div class="line"><a id="l01338" name="l01338"></a><span class="lineno"><a class="line" href="wcshdr_8h.html#ae2dfc36c150d3a16a5e83131d32ecdaea0c926e2cc98a8c39585aa0e212423459"> 1338</a></span> <a class="code hl_enumvalue" href="wcshdr_8h.html#ae2dfc36c150d3a16a5e83131d32ecdaea0c926e2cc98a8c39585aa0e212423459">WCSHDRERR_BAD_COLUMN</a> = 3, <span class="comment">// Invalid column selection.</span></div>
<div class="line"><a id="l01339" name="l01339"></a><span class="lineno"><a class="line" href="wcshdr_8h.html#ae2dfc36c150d3a16a5e83131d32ecdaea218297c7a2a4d405c251e9ed239e615b"> 1339</a></span> <a class="code hl_enumvalue" href="wcshdr_8h.html#ae2dfc36c150d3a16a5e83131d32ecdaea218297c7a2a4d405c251e9ed239e615b">WCSHDRERR_PARSER</a> = 4, <span class="comment">// Fatal error returned by Flex</span></div>
<div class="line"><a id="l01340" name="l01340"></a><span class="lineno"> 1340</span> <span class="comment">// parser.</span></div>
<div class="line"><a id="l01341" name="l01341"></a><span class="lineno"> 1341</span> <a class="code hl_enumvalue" href="wcshdr_8h.html#ae2dfc36c150d3a16a5e83131d32ecdaeaeae58359638c0c631e6c7c573a343508">WCSHDRERR_BAD_TABULAR_PARAMS</a> = 5 <span class="comment">// Invalid tabular parameters.</span></div>
<div class="line"><a id="l01342" name="l01342"></a><span class="lineno"><a class="line" href="wcshdr_8h.html#ae2dfc36c150d3a16a5e83131d32ecdaeaeae58359638c0c631e6c7c573a343508"> 1342</a></span>};</div>
</div>
<div class="line"><a id="l01343" name="l01343"></a><span class="lineno"> 1343</span> </div>
<div class="line"><a id="l01344" name="l01344"></a><span class="lineno"><a class="line" href="wcshdr_8h.html#ac75623ee805ab7d43b0bba684c719a60"> 1344</a></span><span class="keywordtype">int</span> <a class="code hl_function" href="wcshdr_8h.html#ac75623ee805ab7d43b0bba684c719a60">wcspih</a>(<span class="keywordtype">char</span> *header, <span class="keywordtype">int</span> nkeyrec, <span class="keywordtype">int</span> relax, <span class="keywordtype">int</span> ctrl, <span class="keywordtype">int</span> *nreject,</div>
<div class="line"><a id="l01345" name="l01345"></a><span class="lineno"> 1345</span> <span class="keywordtype">int</span> *nwcs, <span class="keyword">struct</span> <a class="code hl_struct" href="structwcsprm.html">wcsprm</a> **wcs);</div>
<div class="line"><a id="l01346" name="l01346"></a><span class="lineno"> 1346</span> </div>
<div class="line"><a id="l01347" name="l01347"></a><span class="lineno"><a class="line" href="wcshdr_8h.html#adc053d80a9c4da454a52eed34e123633"> 1347</a></span><span class="keywordtype">int</span> <a class="code hl_function" href="wcshdr_8h.html#adc053d80a9c4da454a52eed34e123633">wcsbth</a>(<span class="keywordtype">char</span> *header, <span class="keywordtype">int</span> nkeyrec, <span class="keywordtype">int</span> relax, <span class="keywordtype">int</span> ctrl, <span class="keywordtype">int</span> keysel,</div>
<div class="line"><a id="l01348" name="l01348"></a><span class="lineno"> 1348</span> <span class="keywordtype">int</span> *colsel, <span class="keywordtype">int</span> *nreject, <span class="keywordtype">int</span> *nwcs, <span class="keyword">struct</span> <a class="code hl_struct" href="structwcsprm.html">wcsprm</a> **wcs);</div>
<div class="line"><a id="l01349" name="l01349"></a><span class="lineno"> 1349</span> </div>
<div class="line"><a id="l01350" name="l01350"></a><span class="lineno"><a class="line" href="wcshdr_8h.html#a6dd857f7b61a5b349cc8af5a4b6d8a1c"> 1350</a></span><span class="keywordtype">int</span> <a class="code hl_function" href="wcshdr_8h.html#a6dd857f7b61a5b349cc8af5a4b6d8a1c">wcstab</a>(<span class="keyword">struct</span> <a class="code hl_struct" href="structwcsprm.html">wcsprm</a> *wcs);</div>
<div class="line"><a id="l01351" name="l01351"></a><span class="lineno"> 1351</span> </div>
<div class="line"><a id="l01352" name="l01352"></a><span class="lineno"><a class="line" href="wcshdr_8h.html#a6174a483baad91dae3fa1c30b0e4cde5"> 1352</a></span><span class="keywordtype">int</span> <a class="code hl_function" href="wcshdr_8h.html#a6174a483baad91dae3fa1c30b0e4cde5">wcsidx</a>(<span class="keywordtype">int</span> nwcs, <span class="keyword">struct</span> <a class="code hl_struct" href="structwcsprm.html">wcsprm</a> **wcs, <span class="keywordtype">int</span> alts[27]);</div>
<div class="line"><a id="l01353" name="l01353"></a><span class="lineno"> 1353</span> </div>
<div class="line"><a id="l01354" name="l01354"></a><span class="lineno"><a class="line" href="wcshdr_8h.html#a16e35904c64fe6b0aab144bd022c722f"> 1354</a></span><span class="keywordtype">int</span> <a class="code hl_function" href="wcshdr_8h.html#a16e35904c64fe6b0aab144bd022c722f">wcsbdx</a>(<span class="keywordtype">int</span> nwcs, <span class="keyword">struct</span> <a class="code hl_struct" href="structwcsprm.html">wcsprm</a> **wcs, <span class="keywordtype">int</span> type, <span class="keywordtype">short</span> alts[1000][28]);</div>
<div class="line"><a id="l01355" name="l01355"></a><span class="lineno"> 1355</span> </div>
<div class="line"><a id="l01356" name="l01356"></a><span class="lineno"><a class="line" href="wcshdr_8h.html#a27465844aaeea0623133f8151ca4fd9b"> 1356</a></span><span class="keywordtype">int</span> <a class="code hl_function" href="wcshdr_8h.html#a27465844aaeea0623133f8151ca4fd9b">wcsvfree</a>(<span class="keywordtype">int</span> *nwcs, <span class="keyword">struct</span> <a class="code hl_struct" href="structwcsprm.html">wcsprm</a> **wcs);</div>
<div class="line"><a id="l01357" name="l01357"></a><span class="lineno"> 1357</span> </div>
<div class="line"><a id="l01358" name="l01358"></a><span class="lineno"><a class="line" href="wcshdr_8h.html#ace387e4a5f6c519ad2a0e1fdebe62381"> 1358</a></span><span class="keywordtype">int</span> <a class="code hl_function" href="wcshdr_8h.html#ace387e4a5f6c519ad2a0e1fdebe62381">wcshdo</a>(<span class="keywordtype">int</span> ctrl, <span class="keyword">struct</span> <a class="code hl_struct" href="structwcsprm.html">wcsprm</a> *wcs, <span class="keywordtype">int</span> *nkeyrec, <span class="keywordtype">char</span> **header);</div>
<div class="line"><a id="l01359" name="l01359"></a><span class="lineno"> 1359</span> </div>
<div class="line"><a id="l01360" name="l01360"></a><span class="lineno"> 1360</span> </div>
<div class="line"><a id="l01361" name="l01361"></a><span class="lineno"> 1361</span><span class="preprocessor">#ifdef __cplusplus</span></div>
<div class="line"><a id="l01362" name="l01362"></a><span class="lineno"> 1362</span>}</div>
<div class="line"><a id="l01363" name="l01363"></a><span class="lineno"> 1363</span><span class="preprocessor">#endif</span></div>
<div class="line"><a id="l01364" name="l01364"></a><span class="lineno"> 1364</span> </div>
<div class="line"><a id="l01365" name="l01365"></a><span class="lineno"> 1365</span><span class="preprocessor">#endif </span><span class="comment">// WCSLIB_WCSHDR</span></div>
<div class="ttc" id="astructwcsprm_html"><div class="ttname"><a href="structwcsprm.html">wcsprm</a></div><div class="ttdoc">Coordinate transformation parameters.</div><div class="ttdef"><b>Definition</b> wcs.h:2085</div></div>
<div class="ttc" id="awcs_8h_html"><div class="ttname"><a href="wcs_8h.html">wcs.h</a></div></div>
<div class="ttc" id="awcshdr_8h_html_a06cd9297f8315235ba1cf13d1cc115e1"><div class="ttname"><a href="wcshdr_8h.html#a06cd9297f8315235ba1cf13d1cc115e1">wcshdr_errmsg</a></div><div class="ttdeci">const char * wcshdr_errmsg[]</div><div class="ttdoc">Status return messages.</div></div>
<div class="ttc" id="awcshdr_8h_html_a16e35904c64fe6b0aab144bd022c722f"><div class="ttname"><a href="wcshdr_8h.html#a16e35904c64fe6b0aab144bd022c722f">wcsbdx</a></div><div class="ttdeci">int wcsbdx(int nwcs, struct wcsprm **wcs, int type, short alts[1000][28])</div><div class="ttdoc">Index alternate coordinate representions.</div></div>
<div class="ttc" id="awcshdr_8h_html_a27465844aaeea0623133f8151ca4fd9b"><div class="ttname"><a href="wcshdr_8h.html#a27465844aaeea0623133f8151ca4fd9b">wcsvfree</a></div><div class="ttdeci">int wcsvfree(int *nwcs, struct wcsprm **wcs)</div><div class="ttdoc">Free the array of wcsprm structs.</div></div>
<div class="ttc" id="awcshdr_8h_html_a6174a483baad91dae3fa1c30b0e4cde5"><div class="ttname"><a href="wcshdr_8h.html#a6174a483baad91dae3fa1c30b0e4cde5">wcsidx</a></div><div class="ttdeci">int wcsidx(int nwcs, struct wcsprm **wcs, int alts[27])</div><div class="ttdoc">Index alternate coordinate representations.</div></div>
<div class="ttc" id="awcshdr_8h_html_a6dd857f7b61a5b349cc8af5a4b6d8a1c"><div class="ttname"><a href="wcshdr_8h.html#a6dd857f7b61a5b349cc8af5a4b6d8a1c">wcstab</a></div><div class="ttdeci">int wcstab(struct wcsprm *wcs)</div><div class="ttdoc">Tabular construction routine.</div></div>
<div class="ttc" id="awcshdr_8h_html_ac75623ee805ab7d43b0bba684c719a60"><div class="ttname"><a href="wcshdr_8h.html#ac75623ee805ab7d43b0bba684c719a60">wcspih</a></div><div class="ttdeci">int wcspih(char *header, int nkeyrec, int relax, int ctrl, int *nreject, int *nwcs, struct wcsprm **wcs)</div><div class="ttdoc">FITS WCS parser routine for image headers.</div></div>
<div class="ttc" id="awcshdr_8h_html_ace387e4a5f6c519ad2a0e1fdebe62381"><div class="ttname"><a href="wcshdr_8h.html#ace387e4a5f6c519ad2a0e1fdebe62381">wcshdo</a></div><div class="ttdeci">int wcshdo(int ctrl, struct wcsprm *wcs, int *nkeyrec, char **header)</div><div class="ttdoc">Write out a wcsprm struct as a FITS header.</div></div>
<div class="ttc" id="awcshdr_8h_html_adc053d80a9c4da454a52eed34e123633"><div class="ttname"><a href="wcshdr_8h.html#adc053d80a9c4da454a52eed34e123633">wcsbth</a></div><div class="ttdeci">int wcsbth(char *header, int nkeyrec, int relax, int ctrl, int keysel, int *colsel, int *nreject, int *nwcs, struct wcsprm **wcs)</div><div class="ttdoc">FITS WCS parser routine for binary table and image headers.</div></div>
<div class="ttc" id="awcshdr_8h_html_ae2dfc36c150d3a16a5e83131d32ecdae"><div class="ttname"><a href="wcshdr_8h.html#ae2dfc36c150d3a16a5e83131d32ecdae">wcshdr_errmsg_enum</a></div><div class="ttdeci">wcshdr_errmsg_enum</div><div class="ttdef"><b>Definition</b> wcshdr.h:1334</div></div>
<div class="ttc" id="awcshdr_8h_html_ae2dfc36c150d3a16a5e83131d32ecdaea0a858638ef0dd0dc9b529f98b14cc46f"><div class="ttname"><a href="wcshdr_8h.html#ae2dfc36c150d3a16a5e83131d32ecdaea0a858638ef0dd0dc9b529f98b14cc46f">WCSHDRERR_MEMORY</a></div><div class="ttdeci">@ WCSHDRERR_MEMORY</div><div class="ttdef"><b>Definition</b> wcshdr.h:1337</div></div>
<div class="ttc" id="awcshdr_8h_html_ae2dfc36c150d3a16a5e83131d32ecdaea0c926e2cc98a8c39585aa0e212423459"><div class="ttname"><a href="wcshdr_8h.html#ae2dfc36c150d3a16a5e83131d32ecdaea0c926e2cc98a8c39585aa0e212423459">WCSHDRERR_BAD_COLUMN</a></div><div class="ttdeci">@ WCSHDRERR_BAD_COLUMN</div><div class="ttdef"><b>Definition</b> wcshdr.h:1338</div></div>
<div class="ttc" id="awcshdr_8h_html_ae2dfc36c150d3a16a5e83131d32ecdaea218297c7a2a4d405c251e9ed239e615b"><div class="ttname"><a href="wcshdr_8h.html#ae2dfc36c150d3a16a5e83131d32ecdaea218297c7a2a4d405c251e9ed239e615b">WCSHDRERR_PARSER</a></div><div class="ttdeci">@ WCSHDRERR_PARSER</div><div class="ttdef"><b>Definition</b> wcshdr.h:1339</div></div>
<div class="ttc" id="awcshdr_8h_html_ae2dfc36c150d3a16a5e83131d32ecdaea99dd31e274ec97542e650ff89357cded"><div class="ttname"><a href="wcshdr_8h.html#ae2dfc36c150d3a16a5e83131d32ecdaea99dd31e274ec97542e650ff89357cded">WCSHDRERR_NULL_POINTER</a></div><div class="ttdeci">@ WCSHDRERR_NULL_POINTER</div><div class="ttdef"><b>Definition</b> wcshdr.h:1336</div></div>
<div class="ttc" id="awcshdr_8h_html_ae2dfc36c150d3a16a5e83131d32ecdaeabfe69dd9e4c486f856a5dc44b02e79a1"><div class="ttname"><a href="wcshdr_8h.html#ae2dfc36c150d3a16a5e83131d32ecdaeabfe69dd9e4c486f856a5dc44b02e79a1">WCSHDRERR_SUCCESS</a></div><div class="ttdeci">@ WCSHDRERR_SUCCESS</div><div class="ttdef"><b>Definition</b> wcshdr.h:1335</div></div>
<div class="ttc" id="awcshdr_8h_html_ae2dfc36c150d3a16a5e83131d32ecdaeaeae58359638c0c631e6c7c573a343508"><div class="ttname"><a href="wcshdr_8h.html#ae2dfc36c150d3a16a5e83131d32ecdaeaeae58359638c0c631e6c7c573a343508">WCSHDRERR_BAD_TABULAR_PARAMS</a></div><div class="ttdeci">@ WCSHDRERR_BAD_TABULAR_PARAMS</div><div class="ttdef"><b>Definition</b> wcshdr.h:1341</div></div>
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