payloads/libpayload/include/stdarg.h

/*
 * This file is part of the libpayload project.
 *
 * Copyright (C) 2008 Advanced Micro Devices, Inc.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. 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.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
 */

#ifndef _LIBPAYLOAD_STDARG_H
#define _LIBPAYLOAD_STDARG_H

#include <stddef.h>

/* With GCC we use -nostdinc -ffreestanding to keep out system includes.
 * Unfortunately this also gets us rid of the _compiler_ includes, like
 * stdarg.h. To work around the issue, we define varargs directly here.
 * On LLVM we can still just include stdarg.h.
 */
#ifdef __GNUC__
#define va_start(v,l)		__builtin_va_start(v,l)
#define va_end(v)		__builtin_va_end(v)
#define va_arg(v,l)		__builtin_va_arg(v,l)
typedef __builtin_va_list	va_list;
#else
#include_next <stdarg.h>
#endif

/**
 * @defgroup vprintf Varargs print functions
 * @{
 */
int vsnprintf(char *str, size_t size, const char *fmt, va_list ap);
int vsprintf(char *str, const char *fmt, va_list ap);
int vprintf(const char *fmt, va_list ap);
/** @} */

#endif