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/* Formatted output to strings.
Copyright (C) 1999, 2002, 2006-2025 Free Software Foundation, Inc.
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. */
#ifdef IN_LIBASPRINTF
# include "vasprintf.h"
#else
# include <stdio.h>
#endif
#include <errno.h>
#include <limits.h>
#include <stdint.h>
#include <stdlib.h>
#include "vasnprintf.h"
int
vasprintf (char **resultp, const char *format, va_list args)
{
size_t length;
char *result = vasnprintf (NULL, &length, format, args);
if (result == NULL)
return -1;
#if PTRDIFF_MAX > INT_MAX
if (length > INT_MAX)
{
free (result);
errno = (length > PTRDIFF_MAX ? ENOMEM : EOVERFLOW);
return -1;
}
#else
if (length > PTRDIFF_MAX)
{
free (result);
errno = ENOMEM;
return -1;
}
#endif
*resultp = result;
/* Return the number of resulting bytes, excluding the trailing NUL. */
return length;
}
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