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/* Formatted output to a stream.
Copyright (C) 2004, 2006-2016 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 <http://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 "fseterr.h"
#include "vasnprintf.h"
/* Print formatted output to the stream FP.
Return string length of formatted string. On error, return a negative
value. */
int
vfprintf (FILE *fp, const char *format, va_list args)
{
char buf[2000];
char *output;
size_t len;
size_t lenbuf = sizeof (buf);
output = 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 (output != buf)
free (output);
if (len > INT_MAX)
{
errno = EOVERFLOW;
fseterr (fp);
return -1;
}
return len;
}
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