//
// Created by rick on 01-02-21.
//

#include "string.h"
#include "stdbool.h"
#include <libc/libc.h>
#include <types.h>

int strcpy(char *dst, char *src) {
    return memcpy(dst, src, strlen(src) + 1);
}

int strlen(const char *str) {
    int length = 0;
    while (str[length] != 0) {
        length++;
    }
    return length;
}

int strcmp(const char *s1, const char *s2) {
    int len1 = strlen(s1);
    int len2 = strlen(s1);
    return strncmp(s1, s2, maxi(len1, len2));
}

const char *strchr(const char *s, char c) {
    int index = 0;
    while (true) {
        if (s[index] == c) {
            return &s[index];
        }
        if (s[index] == 0) {
            return NULL;
        }
        index++;
    }
}

int strncmp(const char *s1, const char *s2, int n) {
    for (int i = 0; i < n; ++i) {
        if (s1[i] == 0 && s2[i] == 0) {
            return 0;
        }
        if (s1[i] == 0) {
            return -1;
        }
        if (s2[i] == 0) {
            return 1;
        }
        if (s1[i] > s2[i]) {
            return -1;
        }
        if (s2[i] < s1[i]) {
            return 1;
        }
    }
    return 0;
}