s21_string

#include <stdio.h>
#include <string.h>
#include "s21_string.h"


void input(char *a);
void output(char *a);

/*
int main() {
    char *str1 = "1235";
    char *str2 = "1234";
    printf("Длина\n");
    s21_size_t l1 = s21_strlen(str1);
    printf("len = %d\n\n", l1);

    //input(str1);
    //input(str2);
    printf("сравнение\n");
    s21_size_t f = s21_strcmp(str1, str2);
    printf("flag = %d\n", f);
    printf("original flag = %d\n\n", strcmp(str1, str2));

    printf("сравнение n\n");
    s21_size_t g = s21_strncmp(str1, str2, 4);
    printf("flag = %d\n", g);
    printf("original flag = %d\n\n", strncmp(str1, str2, 4));
    printf("копия\n");
    char buf[6]="";
    s21_strcpy(buf, str1);
    printf("%s\n\n", buf);

    printf("копия n\n");
    char buf1[32]="";
    s21_strncpy(buf1, str1, 8);
    printf("%s\n\n", buf1);

    output(str1);
    output(str2);
    return 0;
}
*/

void input(char *a) {
    for (int i = 0; i < 10; i++) {
        scanf("%c ", a+i);
    }
}
void output(char *a) {
    int len = s21_strlen(a);
    for (int p = 0; p < len; p++) {
        printf("%c", *(a+p));
    }
    printf("\n");
}

int s21_strcmp(const char *str1, const char *str2) {
    int f = 0;
    int len = s21_strlen(str1);
    int len2 = s21_strlen(str2);
    if(len2 > len)
        len = len2;
    for (int i = 0; i < len; ++i) {
        if (*(str1+i) > *(str2+i)) {
            f = *(str1+i) - *(str2+i);
            break;
        } else if (*(str1+i) < *(str2+i)){
            // f = -1;
            f = *(str1+i) - *(str2+i);
            break;
        }
    }
    return f;
}

s21_size_t s21_strlen(const char *str)
{
    s21_size_t len = 0;
    while (1) {
        if (*(str+len) == '\0')
            break;
        len++;
    }
    return len;
}

s21_size_t s21_strncmp(const char *str1, const char *str2, s21_size_t n) {
    int f = 0;
    for (int i = 0; i < n; ++i) {
        if (*(str1+i) > *(str2+i)) {
            f = *(str1+i) - *(str2+i);
            break;
        } else if (*(str1+i) < *(str2+i)){
            f = *(str1+i) - *(str2+i);
            break;
        }
    }
    return f;
}

char *s21_strcpy(char *dest, const char *src) {
    int i = 0;
    while (*(src+i) != '\0') {
        *(dest+i) = *(src+i);
        i++;
    }
    return dest;
}

char *s21_strncpy(char *dest, const char *src, int n) {
    for (int i = 0; i < n; i++) {
        *(dest+i) = *(src+i);
    }
    return dest;
}
/*
int s21_memcmp(const void *str1, const void *str2, s21_size_t n) {
    int returnable = 0;
    char *str1_temp = (char *)str1;
    char *str2_temp = (char *)str2;
    if (str1_temp == NULL && str2_temp == NULL) {
        returnable = 0;
    } else if (str1_temp == NULL && str2_temp != NULL) {
        returnable = 1;
    } else if (str1_temp != NULL && str2_temp == NULL) {
        returnable = -1;
    } else {
        s21_size_t i = 0;
        while (i < n && str1_temp[i] == str2_temp[i]) {
        i++;
        }
        if (i != n && str1_temp[i] > str2_temp[i]) {
            returnable = 1;
        } else if (i != n && str1_temp[i] < str2_temp[i]) {
            returnable = -1;
        } else {
            returnable = 0;
        }
    }
    return returnable;
}
*/