rockbox/firmware/asm/mempcpy.c

48 lines
1.1 KiB
C
Raw Normal View History

/*
FUNCTION
<<mempcpy>>---copy memory regions and return end pointer
ANSI_SYNOPSIS
#include <string.h>
void* mempcpy(void *<[out]>, const void *<[in]>, size_t <[n]>);
TRAD_SYNOPSIS
void *mempcpy(<[out]>, <[in]>, <[n]>
void *<[out]>;
void *<[in]>;
size_t <[n]>;
DESCRIPTION
This function copies <[n]> bytes from the memory region
pointed to by <[in]> to the memory region pointed to by
<[out]>.
If the regions overlap, the behavior is undefined.
RETURNS
<<mempcpy>> returns a pointer to the byte following the
last byte copied to the <[out]> region.
PORTABILITY
<<mempcpy>> is a GNU extension.
<<mempcpy>> requires no supporting OS subroutines.
*/
#include "config.h"
#include "_ansi.h" /* for _DEFUN */
#include <string.h>
/* This may be conjoined with memcpy in <cpu>/memcpy.S to get it nearly for
free */
_PTR
_DEFUN (mempcpy, (dst0, src0, len0),
_PTR dst0 _AND
_CONST _PTR src0 _AND
size_t len0)
{
return memcpy(dst0, src0, len0) + len0;
}