#include <assert.h>
#include <err.h>
#include <stddef.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>

# define NB_TEST 5

size_t my_strlen(char *str);
char *my_strcpy(char *dest, char *src);
char *my_strchr(const char *s, int c);

static void strlen_test(char **tests)
{
    puts("my_strlen");
    for (int i = 0; i < NB_TEST; i++)
    {
        char *s1 = tests[i];
        printf("test : %s\n", s1);
        size_t l1 = my_strlen(s1);
        size_t l2 = strlen(s1);
        if (l1 != l2)
            err(1, "result : %ld, expected %ld\n", l1, l2);
    }
}

static void strcpy_test(char **tests)
{
    puts("my_strcpy");
    for (int i = 0; i < NB_TEST; i++)
    {
        char *s1 = tests[i];
        char *s2 = calloc(my_strlen(s1), sizeof(char));
        char *s3 = calloc(strlen(s1), sizeof(char));
        printf("test : %s\n", s1);
        if (strcmp(my_strcpy(s1, s2), strcpy(s1, s3)))
            err(1, "FAILED strcpy : expected %s, mine %s\n", s3, s2);
        free(s2);
        free(s3);
        s2 = NULL;
        s3 = NULL;
    }
}

static void strchr_test(char **tests)
{
    puts("my_strchr");
    for (int i = 0; i < NB_TEST; i++)
    {
        char *s1 = tests[i];
        printf("test : %s\n", s1);
        for (int j = 0; j < 128; j++)
            assert(my_strchr(s1, j) == strchr(s1, j));
    }

}

int main(void)
{
    char *tests[] =
    {
        "hello word",
        "\0",
        "hello \0 world",
        "",
        " "
    };

    strlen_test(tests);
    strcpy_test(tests);
    strchr_test(tests);
    return 0;
}