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/*
* Copyright (c) 2013, 2015 Paul Mattes.
* All rights reserved.
*
* 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 Paul Mattes nor his contributors may be used
* to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY PAUL MATTES "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 PAUL MATTES 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.
*/
/*
* snprintf.c
* A safer version of snprintf for Windows.
*/
#if !defined(_WIN32) /*[*/
#error For Windows only.
#endif /*]*/
#define IS_SNPRINTF_C 1
#include "globals.h"
/*
* Version of {,v}snprintf that work more like the standard versions, and
* always NULL terminate. They do not, however, return the length that would
* have been written if overflow did not occur -- they return -1, like the
* Windows versions.
*/
int
safe_vsnprintf(char *str, size_t size, const char *fmt, va_list ap)
{
if (size > 0) {
int len;
len = vsnprintf(str, size, fmt, ap);
str[size - 1] = '\0';
return len;
} else {
return 0;
}
}
int
safe_snprintf(char *str, size_t size, const char *fmt, ...)
{
va_list ap;
int len;
va_start(ap, fmt);
len = safe_vsnprintf(str, size, fmt, ap);
va_end(ap);
return len;
}
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