vsprintf.h

bootloader源代码

/*****************************************
 Copyright (c) 2001-2002 
 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

/* Define __gnuc_va_list.  */
typedef void *__gnuc_va_list;
typedef __gnuc_va_list va_list;

/* Amount of space required in an argument list for an arg of type TYPE.
   TYPE may alternatively be an expression whose type is used.  */

#define __va_rounded_size(TYPE)  \
  (((sizeof (TYPE) + sizeof (int) - 1) / sizeof (int)) * sizeof (int))

#define va_start(AP, LASTARG) 						\
 (AP = ((__gnuc_va_list) __builtin_next_arg (LASTARG)))

#undef va_end
void va_end (__gnuc_va_list);		/* Defined in libgcc.a */
#define va_end(AP)	((void)0)

/* We cast to void * and then to TYPE * because this avoids
   a warning about increasing the alignment requirement.  */

#if (defined (__arm__) && ! defined (__ARMEB__)) || defined (__i386__) || defined (__i860__) || defined (__ns32000__) || defined (__vax__)
/* This is for little-endian machines; small args are padded upward.  */
#define va_arg(AP, TYPE)						\
 (AP = (__gnuc_va_list) ((char *) (AP) + __va_rounded_size (TYPE)),	\
  *((TYPE *) (void *) ((char *) (AP) - __va_rounded_size (TYPE))))
#else /* big-endian */
/* This is for big-endian machines; small args are padded downward.  */
#define va_arg(AP, TYPE)						\
 (AP = (__gnuc_va_list) ((char *) (AP) + __va_rounded_size (TYPE)),	\
  *((TYPE *) (void *) ((char *) (AP)					\
		       - ((sizeof (TYPE) < __va_rounded_size (char)	\
			   ? sizeof (TYPE) : __va_rounded_size (TYPE))))))
#endif /* big-endian */

/* Copy __gnuc_va_list into another variable of this type.  */
#define __va_copy(dest, src) (dest) = (src)

/* function prototypes */
		
int sprintf(char * buf, const char *fmt, ...);
int vsprintf(char *buf, const char *fmt, va_list args);

#endif