diff options
Diffstat (limited to 'src/mem/ft_memcmp.c')
| -rw-r--r-- | src/mem/ft_memcmp.c | 46 |
1 files changed, 34 insertions, 12 deletions
diff --git a/src/mem/ft_memcmp.c b/src/mem/ft_memcmp.c index 233d796..c61ca9a 100644 --- a/src/mem/ft_memcmp.c +++ b/src/mem/ft_memcmp.c @@ -11,20 +11,42 @@ /* ************************************************************************** */ #include "libft.h" +#include "libft_mem.h" int ft_memcmp(const void *s1, const void *s2, size_t n) { - size_t i; - t_ftbyte *cast_s1; - t_ftbyte *cast_s2; - - cast_s1 = (t_ftbyte*)s1; - cast_s2 = (t_ftbyte*)s2; - if (n == 0) - return (0); - i = -1; - while (++i < n) - if (cast_s1[i] != cast_s2[i]) - return (cast_s1[i] - cast_s2[i]); + while ((n & 0b111) != 0) + { + n--; + if (*(uint8_t*)s1 != *(uint8_t*)s2) + return (*(uint8_t*)s1 - *(uint8_t*)s2); + s1++; + s2++; + } + while (n > 0) + { + if (*(uint64_t*)s1 != *(uint64_t*)s2) + { + if (((uint8_t*)s1)[0] != ((uint8_t*)s2)[0]) + return (((uint8_t*)s1)[0] - ((uint8_t*)s2)[0]); + if (((uint8_t*)s1)[1] != ((uint8_t*)s2)[1]) + return (((uint8_t*)s1)[1] - ((uint8_t*)s2)[1]); + if (((uint8_t*)s1)[2] != ((uint8_t*)s2)[2]) + return (((uint8_t*)s1)[2] - ((uint8_t*)s2)[2]); + if (((uint8_t*)s1)[3] != ((uint8_t*)s2)[3]) + return (((uint8_t*)s1)[3] - ((uint8_t*)s2)[3]); + if (((uint8_t*)s1)[4] != ((uint8_t*)s2)[4]) + return (((uint8_t*)s1)[4] - ((uint8_t*)s2)[4]); + if (((uint8_t*)s1)[5] != ((uint8_t*)s2)[5]) + return (((uint8_t*)s1)[5] - ((uint8_t*)s2)[5]); + if (((uint8_t*)s1)[6] != ((uint8_t*)s2)[6]) + return (((uint8_t*)s1)[6] - ((uint8_t*)s2)[6]); + if (((uint8_t*)s1)[7] != ((uint8_t*)s2)[7]) + return (((uint8_t*)s1)[7] - ((uint8_t*)s2)[7]); + } + n -= 8; + s1 += 8; + s2 += 8; + } return (0); } |