lib/c-snprintf.c

   1 /* Formatted output to strings in C locale.
   2    Copyright (C) 2004, 2006-2024 Free Software Foundation, Inc.
   3
   4    This file is free software: you can redistribute it and/or modify
   5    it under the terms of the GNU Lesser General Public License as
   6    published by the Free Software Foundation; either version 2.1 of the
   7    License, or (at your option) any later version.
   8
   9    This file is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public License
  15    along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  16
  17 #include <config.h>
  18
  19 /* Specification.  */
  20 #include "c-snprintf.h"
  21
  22 #include <errno.h>
  23 #include <limits.h>
  24 #include <stdarg.h>
  25 #include <stdint.h>
  26
  27 #include "c-vsnprintf.h"
  28
  29 int
  30 c_snprintf (char *str, size_t size, const char *format, ...)
  31 {
  32   va_list args;
  33   ptrdiff_t ret;
  34
  35   va_start (args, format);
  36   ret = c_vsnzprintf (str, size, format, args);
  37   va_end (args);
  38
  39 #if PTRDIFF_MAX > INT_MAX
  40   if (ret > INT_MAX)
  41     {
  42       errno = EOVERFLOW;
  43       return -1;
  44     }
  45 #endif
  46
  47   return ret;
  48 }