1 /*****************************************************************************/
2 /* LibreDWG - free implementation of the DWG file format */
3 /* */
4 /* Copyright (C) 2009-2019 Free Software Foundation, Inc. */
5 /* */
6 /* This library is free software, licensed under the terms of the GNU */
7 /* General Public License as published by the Free Software Foundation, */
8 /* either version 3 of the License, or (at your option) any later version. */
9 /* You should have received a copy of the GNU General Public License */
10 /* along with this program. If not, see <http://www.gnu.org/licenses/>. */
11 /*****************************************************************************/
12
13 /*
14 * decode.h: decoding function prototypes
15 * written by Felipe Castro
16 * modified by Felipe Corrêa da Silva Sances
17 * modified by Rodrigo Rodrigues da Silva
18 * modified by Reini Urban
19 */
20
21 #ifndef DECODE_H
22 #define DECODE_H
23
24 #include "bits.h"
25 #include "dwg.h"
26 #include "decode_r11.h"
27
28 #ifdef IN_DXF_H
29 # error in_dxf.h must be included after decode.h because of FORMAT_BD
30 #endif
31
32 #define REFS_PER_REALLOC 16384
33
34 typedef enum ENTITY_SECTION_INDEX_R11
35 {
36 ENTITIES_SECTION_INDEX = 0,
37 BLOCKS_SECTION_INDEX,
38 EXTRAS_SECTION_INDEX
39 } EntitySectionIndexR11;
40
41 EXPORT int dwg_decode (Bit_Chain *restrict dat, Dwg_Data *restrict dwg);
42 int dwg_decode_unknown_bits (Bit_Chain *restrict dat,
43 Dwg_Object *restrict obj);
44 int dwg_decode_unknown_rest (Bit_Chain *restrict dat,
45 Dwg_Object *restrict obj);
46 Dwg_Object_Ref *dwg_find_objectref (const Dwg_Data *restrict dwg,
47 const Dwg_Object *restrict obj);
48
49 int dwg_decode_BLOCK_HEADER (Bit_Chain *restrict dat,
50 Dwg_Object *restrict obj);
51 int dwg_decode_LAYER (Bit_Chain *restrict dat, Dwg_Object *restrict obj);
52 int dwg_decode_STYLE (Bit_Chain *restrict dat, Dwg_Object *restrict obj);
53 int dwg_decode_LTYPE (Bit_Chain *restrict dat, Dwg_Object *restrict obj);
54 int dwg_decode_VIEW (Bit_Chain *restrict dat, Dwg_Object *restrict obj);
55 int dwg_decode_UCS (Bit_Chain *restrict dat, Dwg_Object *restrict obj);
56 int dwg_decode_VPORT (Bit_Chain *restrict dat, Dwg_Object *restrict obj);
57 int dwg_decode_APPID (Bit_Chain *restrict dat, Dwg_Object *restrict obj);
58 int dwg_decode_DIMSTYLE (Bit_Chain *restrict dat, Dwg_Object *restrict obj);
59 int dwg_decode_VX_TABLE_RECORD (Bit_Chain *restrict dat,
60 Dwg_Object *restrict obj);
61
62 // reused with the importers
63 void decode_BACKGROUND_type (const Dwg_Object *obj);
64
65 /*------------------------------------------------------------------------------
66 * Functions reused with decode_r11
67 */
68 int dwg_decode_eed (Bit_Chain *restrict dat, Dwg_Object_Object *restrict obj);
69
70 /*------------------------------------------------------------------------------
71 * Functions reused with decode_r2007
72 */
73 Dwg_Object_Ref *dwg_decode_handleref (Bit_Chain *restrict hdl_dat,
74 Dwg_Object *restrict obj,
75 Dwg_Data *restrict dwg);
76 Dwg_Object_Ref *dwg_decode_handleref_with_code (Bit_Chain *restrict hdl_dat,
77 Dwg_Object *restrict obj,
78 Dwg_Data *restrict dwg,
79 unsigned int code);
80 int dwg_decode_header_variables (Bit_Chain *dat, Bit_Chain *hdl_dat,
81 Bit_Chain *str_dat, Dwg_Data *restrict dwg);
82 int dwg_decode_add_object (Dwg_Data *restrict dwg, Bit_Chain *dat,
83 Bit_Chain *hdl_dat, size_t address);
84 int obj_handle_stream (Bit_Chain *restrict dat, Dwg_Object *restrict obj,
85 Bit_Chain *restrict hdl_dat);
86 void bfr_read (void *restrict dst, BITCODE_RC *restrict *restrict src,
87 size_t size);
88 void bfr_read_32 (void *restrict dst, BITCODE_RC *restrict *restrict src,
89 size_t size);
90 void bfr_read_64 (void *restrict dst, BITCODE_RC *restrict *restrict src,
91 size_t size);
92
93 /* reused with free */
94 void dwg_free_xdata_resbuf (Dwg_Resbuf *restrict rbuf);
95
96 /* reused with encode */
97 void decrypt_R2004_header (BITCODE_RC *restrict dest,
98 const BITCODE_RC *restrict src, size_t size);
99 void dwg_resolve_objectrefs_silent (Dwg_Data *restrict dwg);
100 uint32_t dwg_section_page_checksum (const uint32_t seed,
101 Bit_Chain *restrict dat, int32_t size);
102 unsigned int section_max_decomp_size (const Dwg_Data *dwg,
103 const Dwg_Section_Type id);
104
105 /* reused with out_dxf */
106 char *dwg_dim_blockname (Dwg_Data *restrict dwg,
107 const Dwg_Object *restrict obj);
108
109 int dwg_validate_INSERT (Dwg_Object *restrict obj);
110 int dwg_validate_POLYLINE (Dwg_Object *restrict obj);
111 /* reused with many */
112 int dwg_fixup_BLOCKS_entities (Dwg_Data *restrict dwg);
113 void dxf_3dsolid_revisionguid (Dwg_Entity_3DSOLID *_obj);
114
115 /* from decode_r2007.c */
116 int obj_string_stream (Bit_Chain *dat, Dwg_Object *restrict obj,
117 Bit_Chain *str_dat);
118 size_t obj_stream_position (Bit_Chain *restrict dat,
119 Bit_Chain *restrict hdl_dat,
120 Bit_Chain *restrict str_dat);
121
122 void read_r2007_init (Dwg_Data *restrict dwg);
123 int read_r2007_meta_data (Bit_Chain *dat, Bit_Chain *hdl_dat,
124 Dwg_Data *restrict dwg);
125 void section_string_stream (Dwg_Data *restrict dwg, Bit_Chain *restrict dat,
126 BITCODE_RL bitsize, Bit_Chain *restrict str);
127 /* for decode_r11.c */
128 int decode_r11_auxheader (Bit_Chain *restrict dat, Dwg_Data *restrict dwg);
129 int decode_preR13_DIMENSION (Bit_Chain *restrict dat,
130 Dwg_Object *restrict obj);
131 int decode_preR13_sentinel (const Dwg_Sentinel sentinel,
132 const char *restrict sentinel_name,
133 Bit_Chain *restrict dat, Dwg_Data *restrict dwg);
134 int decode_preR13_entities (BITCODE_RL start, BITCODE_RL end,
135 unsigned num_entities, BITCODE_RL size,
136 Bit_Chain *restrict dat, Dwg_Data *restrict dwg,
137 const EntitySectionIndexR11 entity_section_index);
138
139 /* from dwg.c */
140 // from dat.fh
141 EXPORT int dat_read_size (Bit_Chain *restrict dat);
142 EXPORT int dat_read_file (Bit_Chain *restrict dat, FILE *restrict fp,
143 const char *restrict filename);
144 EXPORT int dat_read_stream (Bit_Chain *restrict dat, FILE *restrict fp);
145
146 #endif