CeDOS - kernel/os_string.c

kernel/os_string.c (view raw)

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#include "string.h"
#include <stdint.h>

void *memcpy (void *destination, const void *source, size_t num) {
    if (destination >= source) {
        for (uint32_t i = 0; i < num; i++) {
            ((uint8_t*)destination)[num - 1 - i] = ((uint8_t*)source)[num - 1 - i];
        }
    } else {
        for (uint32_t i = 0; i < num; i++) {
            ((uint8_t*)destination)[i] = ((uint8_t*)source)[i];
        }
    }
    return destination;
}

void *memset (void *ptr, int value, size_t num) {
    for (uint32_t i = 0; i < num; i++) {
        ((uint8_t*)ptr)[i] = (uint8_t)value;
    }
    return ptr;
}