vsprintf.h

来自「1. 8623L平台」· C头文件 代码 · 共 39 行

/*****************************************
 Copyright (c) 2003-2007
 Sigma Designs, Inc. All Rights Reserved
 Proprietary and Confidential
 *****************************************/

/* This file is part of the boot loader */

/*
 * vsprintf.h
 *
 * This is the porting of <stdarg.h> for ARM processor
 * also including function prototypes defined in vsprintf.c
 */

#ifndef __BOOTLOADER_VSPRINTF_H
#define __BOOTLOADER_VSPRINTF_H

// stdarg
typedef void *va_list;

// size of memory storing the data with specified type
// data size must be multiple of sizeof(int) : 4 bytes
#define __va_rounded_size(TYPE)  \
  (((sizeof (TYPE) + sizeof (int) - 1) / sizeof (int)) * sizeof (int))

// stdarg standard macros
#define va_start(AP, LASTARG)   (AP = (va_list) __builtin_next_arg(LASTARG))
#define va_end(AP)
#define va_arg(AP, TYPE)        (AP = (va_list) ((char *) (AP) + __va_rounded_size (TYPE)), *((TYPE *) (void *) ((char *) (AP) - __va_rounded_size(TYPE))))

/* function prototypes */
        
int sprintf(char * buf, const char *fmt, ...) __attribute__((format(printf, 2, 3)));
int vsprintf(char *buf, const char *fmt, va_list args);

#endif