kc3-lang/gnulib/lib/unistdio/ulc-vfprintf.c

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• Hash : 32a72f45
  Author :
  Date : 2023-01-01T01:14:21
  

  maint: run 'make update-copyright'
  

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• lib/unistdio/ulc-vfprintf.c

• /* Formatted output to a stream.
     Copyright (C) 2004, 2006-2023 Free Software Foundation, Inc.
  
     This file is free software.
     It is dual-licensed under "the GNU LGPLv3+ or the GNU GPLv2+".
     You can redistribute it and/or modify it under either
       - the terms of the GNU Lesser General Public License as published
         by the Free Software Foundation, either version 3, or (at your
         option) any later version, or
       - the terms of the GNU General Public License as published by the
         Free Software Foundation; either version 2, or (at your option)
         any later version, or
       - the same dual license "the GNU LGPLv3+ or the GNU GPLv2+".
  
     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 and the GNU General Public License
     for more details.
  
     You should have received a copy of the GNU Lesser General Public
     License and of the GNU General Public License along with this
     program.  If not, see <https://www.gnu.org/licenses/>.  */
  
  #ifdef HAVE_CONFIG_H
  # include <config.h>
  #endif
  
  /* Specification.  */
  #include "unistdio.h"
  
  #include <errno.h>
  #include <limits.h>
  #include <stdarg.h>
  #include <stdio.h>
  #include <stdlib.h>
  
  #include "fseterr.h"
  
  /* Print formatted output to the stream FP.
     Return string length of formatted string.  On error, return a negative
     value.  */
  int
  ulc_vfprintf (FILE *fp, const char *format, va_list args)
  {
    char buf[2000];
    char *output;
    size_t len;
    size_t lenbuf = sizeof (buf);
  
    output = ulc_vasnprintf (buf, &lenbuf, format, args);
    len = lenbuf;
  
    if (!output)
      {
        fseterr (fp);
        return -1;
      }
  
    if (fwrite (output, 1, len, fp) < len)
      {
        if (output != buf)
          {
            int saved_errno = errno;
            free (output);
            errno = saved_errno;
          }
        return -1;
      }
  
    if (len > INT_MAX)
      {
        errno = EOVERFLOW;
        fseterr (fp);
        return -1;
      }
  
    return len;
  }
  

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