kc3-lang/gnulib/lib/dprintf.c

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• Hash : 281b825e
  Author :
  Date : 2018-01-01T00:57:25
  

  maint: Run 'make update-copyright'
  

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• lib/dprintf.c

• /* Formatted output to a file descriptor.
     Copyright (C) 2009-2018 Free Software Foundation, Inc.
  
     This program is free software: you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
     the Free Software Foundation; either version 3 of the License, or
     (at your option) any later version.
  
     This program 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 General Public License for more details.
  
     You should have received a copy 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 <stdio.h>
  
  #include <errno.h>
  #include <limits.h>
  #include <stdarg.h>
  #include <stdlib.h>
  
  #include "full-write.h"
  #include "vasnprintf.h"
  
  int
  dprintf (int fd, const char *format, ...)
  {
    char buf[2000];
    char *output;
    size_t len;
    size_t lenbuf = sizeof (buf);
    va_list args;
  
    va_start (args, format);
    output = vasnprintf (buf, &lenbuf, format, args);
    len = lenbuf;
    va_end (args);
  
    if (!output)
      return -1;
  
    if (full_write (fd, output, len) < len)
      {
        if (output != buf)
          {
            int saved_errno = errno;
            free (output);
            errno = saved_errno;
          }
        return -1;
      }
  
    if (output != buf)
      free (output);
  
    if (len > INT_MAX)
      {
        errno = EOVERFLOW;
        return -1;
      }
  
    return len;
  }
  

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