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/* grabbag - Convenience lib for various routines common to several tools
* Copyright (C) 2013-2023 Xiph.Org Foundation
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of the Xiph.org Foundation nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <stdio.h>
#include <stdarg.h>
#include "share/compat.h"
/*
* FLAC needs to compile and work correctly on systems with a normal ISO C99
* snprintf as well as Microsoft Visual Studio which has an non-standards
* conformant snprint_s function.
*
* The important difference occurs when the resultant string (plus string
* terminator) would have been longer than the supplied size parameter. When
* this happens, ISO C's snprintf returns the length of resultant string, but
* does not over-write the end of the buffer. MS's snprintf_s in this case
* returns -1.
*
* The _MSC_VER code below attempts to modify the return code for vsnprintf_s
* to something that is more compatible with the behaviour of the ISO C version.
*/
int
flac_snprintf(char *str, size_t size, const char *fmt, ...)
{
va_list va;
int rc;
#if defined _MSC_VER
if (size == 0)
return 1024;
#endif
va_start (va, fmt);
#if defined _MSC_VER
rc = vsnprintf_s (str, size, _TRUNCATE, fmt, va);
if (rc < 0)
rc = size - 1;
#elif defined __MINGW32__
rc = __mingw_vsnprintf (str, size, fmt, va);
#else
rc = vsnprintf (str, size, fmt, va);
#endif
va_end (va);
return rc;
}
int
flac_vsnprintf(char *str, size_t size, const char *fmt, va_list va)
{
int rc;
#if defined _MSC_VER
if (size == 0)
return 1024;
rc = vsnprintf_s (str, size, _TRUNCATE, fmt, va);
if (rc < 0)
rc = size - 1;
#elif defined __MINGW32__
rc = __mingw_vsnprintf (str, size, fmt, va);
#else
rc = vsnprintf (str, size, fmt, va);
#endif
return rc;
}
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