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/*
This file is part of Warzone 2100.
Copyright (C) 2007 Giel van Schijndel
Copyright (C) 2007-2020 Warzone 2100 Project
Warzone 2100 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 2 of the License, or
(at your option) any later version.
Warzone 2100 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 Warzone 2100; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef STDIO_EXT_H
#define STDIO_EXT_H
#include "wzglobal.h"
#include <stdio.h>
#include <stdarg.h>
// These functions are GNU extensions; so make sure they are available on Windows also
#if defined(WZ_CC_MSVC)
/**
* This function is analogue to vsprintf, except that it allocates a string
* large enough to hold the output including the terminating NUL character.
*
* \param[out] strp If successful will hold a pointer to the formatted
* string. This pointer should be passed to free() to
* release the allocated storage when it is no longer
* needed. When unsuccessful the contents of \c strp are
* undefined (no memory will have been allocated though).
*
* \param format The format specifier (the same to vsprintf).
*
* \param ap An argument list to be used in combination with \c format
* to print the string.
*
* \return When successful the amount of characters printed, just like
* vsprintf. If memory allocation wasn't possible or some other error
* occurred, -1 is returned.
*/
WZ_DECL_NONNULL(1, 2) int vasprintf(char **strp, const char *format, va_list ap);
/**
* This function is analogue to sprintf, except that it allocates a string
* large enough to hold the output including the terminating NUL character.
*
* @see vasprintf()
*/
WZ_DECL_NONNULL(1, 2) int asprintf(char **strp, const char *format, ...) WZ_DECL_FORMAT(printf, 2, 3);
#endif
#if defined(WZ_CC_MSVC)
// Make sure that these functions are available, and work according to the C99 spec on MSVC also
int wz_vsnprintf(char *str, size_t size, const char *format, va_list ap);
WZ_DECL_NONNULL(3) int wz_snprintf(char *str, size_t size, const char *format, ...);
#if defined(_MSC_VER) && _MSC_VER < 1900
// Necessary to prevent conflicting symbols with MSVC's own (incorrect!) implementations of these functions
// on MSVC < 2015
# define vsnprintf wz_vsnprintf
# define snprintf wz_snprintf
#endif // defined(_MSC_VER) && _MSC_VER < 1900
#elif defined(__cplusplus) && defined(WZ_CC_GNU)
// Do nothing here, and assume that G++ has a proper implementation of snprintf and vsnprintf
#elif !defined(WZ_CC_GNU) && !defined(WZ_C99)
# error "This code depends on a C99-compliant implementation of snprintf and vsnprintf; please compile as C99 or provide a compliant implementation!"
#endif
#endif // STDIO_EXT_H
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