| 1 | #include "vof.h" |
| 2 | |
| 3 | int strlen(const char *s) |
| 4 | { |
| 5 | int len = 0; |
| 6 | |
| 7 | while (*s != 0) { |
| 8 | len += 1; |
| 9 | s += 1; |
| 10 | } |
| 11 | |
| 12 | return len; |
| 13 | } |
| 14 | |
| 15 | int strcmp(const char *s1, const char *s2) |
| 16 | { |
| 17 | while (*s1 != 0 && *s2 != 0) { |
| 18 | if (*s1 != *s2) { |
| 19 | break; |
| 20 | } |
| 21 | s1 += 1; |
| 22 | s2 += 1; |
| 23 | } |
| 24 | |
| 25 | return *s1 - *s2; |
| 26 | } |
| 27 | |
| 28 | void *memcpy(void *dest, const void *src, size_t n) |
| 29 | { |
| 30 | char *cdest; |
| 31 | const char *csrc = src; |
| 32 | |
| 33 | cdest = dest; |
| 34 | while (n-- > 0) { |
| 35 | *cdest++ = *csrc++; |
| 36 | } |
| 37 | |
| 38 | return dest; |
| 39 | } |
| 40 | |
| 41 | int memcmp(const void *ptr1, const void *ptr2, size_t n) |
| 42 | { |
| 43 | const unsigned char *p1 = ptr1; |
| 44 | const unsigned char *p2 = ptr2; |
| 45 | |
| 46 | while (n-- > 0) { |
| 47 | if (*p1 != *p2) { |
| 48 | return *p1 - *p2; |
| 49 | } |
| 50 | p1 += 1; |
| 51 | p2 += 1; |
| 52 | } |
| 53 | |
| 54 | return 0; |
| 55 | } |
| 56 | |
| 57 | void *memset(void *dest, int c, size_t size) |
| 58 | { |
| 59 | unsigned char *d = (unsigned char *)dest; |
| 60 | |
| 61 | while (size-- > 0) { |
| 62 | *d++ = (unsigned char)c; |
| 63 | } |
| 64 | |
| 65 | return dest; |
| 66 | } |