1 /* Formatted output functions (printf functions family).
2
3 Copyright 2007-2023 Free Software Foundation, Inc.
4 Contributed by the AriC and Caramba projects, INRIA.
5
6 This file is part of the GNU MPFR Library.
7
8 The GNU MPFR Library is free software; you can redistribute it and/or modify
9 it under the terms of the GNU Lesser General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or (at your
11 option) any later version.
12
13 The GNU MPFR Library is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
15 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
16 License for more details.
17
18 You should have received a copy of the GNU Lesser General Public License
19 along with the GNU MPFR Library; see the file COPYING.LESSER. If not, see
20 https://www.gnu.org/licenses/ or write to the Free Software Foundation, Inc.,
21 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. */
22
23 #ifdef HAVE_CONFIG_H
24 # include "config.h"
25 #endif
26
27 /* The mpfr_printf-like functions are defined only if <stdarg.h> exists.
28 Since they use mpf_t, they cannot be defined with mini-gmp. */
29 #if defined(HAVE_STDARG) && !defined(MPFR_USE_MINI_GMP)
30
31 #include <stdarg.h>
32
33 #include "mpfr-impl.h"
34
35 #ifdef _MPFR_H_HAVE_FILE
36
37 /* Each printf-like function calls mpfr_vasnprintf_aux (directly or
38 via mpfr_vasprintf), which
39 - returns the number of characters to be written excluding the
40 terminating null character (disregarding the size argument);
41 - returns -1 and sets the erange flag if this number exceeds INT_MAX
42 (in that case, also sets errno to EOVERFLOW on POSIX systems). */
43
44 #define GET_STR_VA(sz, str, fmt, ap) \
45 do \
46 { \
47 sz = mpfr_vasprintf (&(str), fmt, ap); \
48 if (sz < 0) \
49 { \
50 if (str) \
51 mpfr_free_str (str); \
52 return -1; \
53 } \
54 } while (0)
55
56 #define GET_STR(sz, str, fmt) \
57 do \
58 { \
59 va_list ap; \
60 va_start(ap, fmt); \
61 sz = mpfr_vasprintf (&(str), fmt, ap); \
62 va_end (ap); \
63 if (sz < 0) \
64 { \
65 if (str) \
66 mpfr_free_str (str); \
67 return -1; \
68 } \
69 } while (0)
70
71 int
72 mpfr_printf (const char *fmt, ...)
73 {
74 char *str;
75 int ret;
76
77 GET_STR (ret, str, fmt);
78 ret = printf ("%s", str);
79
80 mpfr_free_str (str);
81 return ret;
82 }
83
84 int
85 mpfr_vprintf (const char *fmt, va_list ap)
86 {
87 char *str;
88 int ret;
89
90 GET_STR_VA (ret, str, fmt, ap);
91 ret = printf ("%s", str);
92
93 mpfr_free_str (str);
94 return ret;
95 }
96
97
98 int
99 mpfr_fprintf (FILE *fp, const char *fmt, ...)
100 {
101 char *str;
102 int ret;
103
104 GET_STR (ret, str, fmt);
105 ret = fprintf (fp, "%s", str);
106
107 mpfr_free_str (str);
108 return ret;
109 }
110
111 int
112 mpfr_vfprintf (FILE *fp, const char *fmt, va_list ap)
113 {
114 char *str;
115 int ret;
116
117 GET_STR_VA (ret, str, fmt, ap);
118 ret = fprintf (fp, "%s", str);
119
120 mpfr_free_str (str);
121 return ret;
122 }
123
124 #endif /* _MPFR_H_HAVE_FILE */
125
126 int
127 mpfr_sprintf (char *buf, const char *fmt, ...)
128 {
129 char *str;
130 int ret;
131
132 GET_STR (ret, str, fmt);
133 ret = sprintf (buf, "%s", str);
134
135 mpfr_free_str (str);
136 return ret;
137 }
138
139 int
140 mpfr_vsprintf (char *buf, const char *fmt, va_list ap)
141 {
142 char *str;
143 int ret;
144
145 GET_STR_VA (ret, str, fmt, ap);
146 ret = sprintf (buf, "%s", str);
147
148 mpfr_free_str (str);
149 return ret;
150 }
151
152 int
153 mpfr_snprintf (char *buf, size_t size, const char *fmt, ...)
154 {
155 int ret;
156 va_list ap;
157
158 va_start(ap, fmt);
159 ret = mpfr_vasnprintf_aux (NULL, buf, size, fmt, ap);
160 va_end (ap);
161
162 return ret;
163 }
164
165 int
166 mpfr_vsnprintf (char *buf, size_t size, const char *fmt, va_list ap)
167 {
168 return mpfr_vasnprintf_aux (NULL, buf, size, fmt, ap);
169 }
170
171 int
172 mpfr_asprintf (char **pp, const char *fmt, ...)
173 {
174 int ret;
175
176 GET_STR (ret, *pp, fmt);
177
178 return ret;
179 }
180
181 int
182 mpfr_vasprintf (char **ptr, const char *fmt, va_list ap)
183 {
184 return mpfr_vasnprintf_aux (ptr, NULL, 0, fmt, ap);
185 }
186
187 #else /* HAVE_STDARG */
188
189 /* Avoid an empty translation unit (see ISO C99, 6.9) */
190 typedef int foo;
191
192 #endif /* HAVE_STDARG */