kc3-lang/gnulib/lib/snzprintf.c

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• Hash : 7b089321
  Author :
  Date : 2025-01-01T09:24:36
  

  maint: run 'make update-copyright'
  

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• lib/snzprintf.c

• /* Formatted output to strings.
     Copyright (C) 2004, 2006-2025 Free Software Foundation, Inc.
     Written by Simon Josefsson and Paul Eggert.
  
     This file is free software: you can redistribute it and/or modify
     it under the terms of the GNU Lesser General Public License as
     published by the Free Software Foundation; either version 2.1 of the
     License, or (at your option) any later version.
  
     This file is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     GNU Lesser General Public License for more details.
  
     You should have received a copy of the GNU Lesser General Public License
     along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  
  #include <config.h>
  
  /* Specification.  */
  #include <stdio.h>
  
  #include <errno.h>
  #include <stdarg.h>
  #include <stdint.h>
  #include <stdlib.h>
  #include <string.h>
  
  #include "vasnprintf.h"
  
  ptrdiff_t
  snzprintf (char *str, size_t size, const char *format, ...)
  {
    char *output;
    size_t len;
    size_t lenbuf = size;
    va_list args;
  
    va_start (args, format);
    output = vasnprintf (str, &lenbuf, format, args);
    len = lenbuf;
    va_end (args);
  
    if (!output)
      return -1;
  
    if (output != str)
      {
        if (size)
          {
            size_t pruned_len = (len < size ? len : size - 1);
            memcpy (str, output, pruned_len);
            str[pruned_len] = '\0';
          }
  
        free (output);
      }
  
    if (len > PTRDIFF_MAX)
      {
        errno = ENOMEM;
        return -1;
      }
  
    return len;
  }
  

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