114 lines
2.0 KiB
C
114 lines
2.0 KiB
C
#include <stddef.h>
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#include <stdint.h>
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#include <lib/libc.h>
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void *memcpy(void *dest, const void *src, size_t count) {
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size_t i = 0;
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uint8_t *dest2 = dest;
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const uint8_t *src2 = src;
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for (i = 0; i < count; i++) {
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dest2[i] = src2[i];
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}
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return dest;
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}
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void *memset(void *s, int c, size_t count) {
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uint8_t *p = s, *end = p + count;
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for (; p != end; p++) {
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*p = (uint8_t)c;
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}
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return s;
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}
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void *memmove(void *dest, const void *src, size_t count) {
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size_t i = 0;
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uint8_t *dest2 = dest;
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const uint8_t *src2 = src;
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if (src > dest) {
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for (i = 0; i < count; i++) {
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dest2[i] = src2[i];
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}
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} else if (src < dest) {
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for (i = count; i > 0; i--) {
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dest2[i - 1] = src2[i - 1];
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}
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}
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return dest;
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}
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int memcmp(const void *s1, const void *s2, size_t n) {
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const uint8_t *a = s1;
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const uint8_t *b = s2;
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for (size_t i = 0; i < n; i++) {
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if (a[i] < b[i]) {
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return -1;
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} else if (a[i] > b[i]) {
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return 1;
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}
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}
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return 0;
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}
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char *strchrnul(const char *s, int c) {
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while (*s)
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if ((*s++) == c)
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break;
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return (char *)s;
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}
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char *strcpy(char *dest, const char *src) {
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size_t i = 0;
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for (i = 0; src[i]; i++)
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dest[i] = src[i];
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dest[i] = 0;
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return dest;
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}
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char *strncpy(char *dest, const char *src, size_t cnt) {
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size_t i = 0;
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for (i = 0; i < cnt; i++)
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dest[i] = src[i];
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return dest;
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}
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int strcmp(const char *dst, const char *src) {
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size_t i;
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for (i = 0; dst[i] == src[i]; i++) {
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if ((!dst[i]) && (!src[i])) return 0;
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}
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return 1;
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}
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int strncmp(const char *dst, const char *src, size_t count) {
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size_t i;
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for (i = 0; i < count; i++)
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if (dst[i] != src[i]) return 1;
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return 0;
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}
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size_t strlen(const char *str) {
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size_t len;
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for (len = 0; str[len]; len++);
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return len;
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}
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