memcpy()
- 与strcpy相比,复制的内容不同,复制的方法不同,用途也不相同
void *memcpy(void *dest, const void *src, size_t count)
{
assert(dest != NULL && src != NULL);
char *tmp = dest;
const char *s = src;
while (count--)
*tmp++ = *s++ ;
return dest;
}
memmove()
#include <linux/string.h>
#undef memmove
void *memmove ( void * dest, const void *src, size_t count)
{
assert(dest == NULL || str == NULL || count <= 0);
if (dest < src) {
__inline_memcpy(dest,src,count);
} else {
char *p = ( char *) dest + count;
char *s = ( char *) src + count;
while (count--)
*--p = *--s;
}
return dest;
}