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      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 */
    193