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[libc] Convert memcpy() from a macro to an inline function

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Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2012-11-04 22:50:27 +00:00
parent fc30b13b25
commit 61c6af3f0b
2 changed files with 25 additions and 4 deletions
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28
src/arch/x86/include/bits/string.h
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@@ -28,6 +28,14 @@ FILE_LICENCE ( PUBLIC_DOMAIN );
extern void * __memcpy ( void *dest, const void *src, size_t len );
extern void * __memcpy_reverse ( void *dest, const void *src, size_t len );
/**
* Copy memory area (where length is a compile-time constant)
*
* @v dest Destination address
* @v src Source address
* @v len Length
* @ret dest Destination address
*/
static inline __attribute__ (( always_inline )) void *
__constant_memcpy ( void *dest, const void *src, size_t len ) {
union {
@@ -139,10 +147,22 @@ __constant_memcpy ( void *dest, const void *src, size_t len ) {
return dest;
}
#define memcpy( dest, src, len ) \
( __builtin_constant_p ( (len) ) ? \
__constant_memcpy ( (dest), (src), (len) ) : \
__memcpy ( (dest), (src), (len) ) )
/**
* Copy memory area
*
* @v dest Destination address
* @v src Source address
* @v len Length
* @ret dest Destination address
*/
static inline __attribute__ (( always_inline )) void *
memcpy ( void *dest, const void *src, size_t len ) {
if ( __builtin_constant_p ( len ) ) {
return __constant_memcpy ( dest, src, len );
} else {
return __memcpy ( dest, src, len );
}
}
#define __HAVE_ARCH_MEMMOVE

1
src/include/string.h
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@@ -37,6 +37,7 @@ char * __pure strpbrk(const char * cs,const char * ct) __nonnull;
char * strtok(char * s,const char * ct) __nonnull;
char * strsep(char **s, const char *ct) __nonnull;
void * memset(void * s,int c,size_t count) __nonnull;
void * memcpy ( void *dest, const void *src, size_t len ) __nonnull;
void * memmove(void * dest,const void *src,size_t count) __nonnull;
int __pure memcmp(const void * cs,const void * ct,
size_t count) __nonnull;