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/*
* Copyright © 2008-2014 Intel Corporation.
*
* Authors: David Woodhouse <dwmw2@infradead.org>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* version 2.1, as published by the Free Software Foundation.
*
* 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
* Lesser General Public License for more details.
*/
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <stdarg.h>
#include "vasprintf.h"
#ifndef HAVE_VASPRINTF
int _gnutls_vasprintf(char **strp, const char *fmt, va_list ap)
{
va_list ap2;
char *res = NULL;
int len = 160, len2;
int ret = 0;
int errno_save = -ENOMEM;
res = malloc(160);
if (!res)
goto err;
/* Use a copy of 'ap', preserving it in case we need to retry into
a larger buffer. 160 characters should be sufficient for most
strings in openconnect. */
#ifdef HAVE_VA_COPY
va_copy(ap2, ap);
#elif defined(HAVE___VA_COPY)
__va_copy(ap2, ap);
#else
#error No va_copy()!
/* You could try this. */
ap2 = ap;
/* Or this */
*ap2 = *ap;
#endif
len = vsnprintf(res, 160, fmt, ap2);
va_end(ap2);
if (len < 0) {
printf_err:
errno_save = errno;
free(res);
res = NULL;
goto err;
}
if (len >= 0 && len < 160)
goto out;
free(res);
res = malloc(len+1);
if (!res)
goto err;
len2 = vsnprintf(res, len+1, fmt, ap);
if (len2 < 0 || len2 > len)
goto printf_err;
ret = 0;
goto out;
err:
errno = errno_save;
ret = -1;
out:
*strp = res;
return ret;
}
#endif
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