memutil.c

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/*
WKern - A Bare Metal OS / Kernel I am maKing (For Fun)
Copyright (C) 2025  Wdboyes13
 
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
any later version.
 
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.
 
You should have received a copy of the GNU General Public License
along with this program.  If not, see <https://www.gnu.org/licenses/>.
*/
 
#include <mem/kmem.h>
void Kmemset(void *ptr, unsigned char value, unsigned int num) {
    unsigned char *p = (unsigned char *)ptr;
    for (unsigned int i = 0; i < num; i++) {
        p[i] = value;
    }
}

void *Kmemcpy(void *dest, const void *src, unsigned int count) {
    unsigned char *d = (unsigned char *)dest;
    const unsigned char *s = (const unsigned char *)src;
    while (count--) {
        *d++ = *s++;
    }
    return dest;
}

int Kmemcmp(const void *a, const void *b, size_t n) {
    const unsigned char *p1 = (const unsigned char *)a;
    const unsigned char *p2 = (const unsigned char *)b;
 
    for (size_t i = 0; i < n; i++) {
        if (p1[i] != p2[i]) {
            return (int)p1[i] - (int)p2[i];
        }
    }
    return 0;
}