#include "util.h"

#include <stdlib.h>

char *strdup(const char *s)
{
    size_t slen = strlen(s);
    char *result = (char *)malloc(sizeof(char) * (slen + 1));
    if (result == NULL)
    {
        return NULL;
    }

    memcpy(result, s, slen + 1);
    return result;
}

char *w_strcat(char *s, char *s2)
{
    size_t slen = strlen(s);
    size_t slen2 = strlen(s2);
    s = realloc(s, sizeof(char) * (slen + slen2 + 1));
    strcat(s, s2);
    return s;
}

uint64_t str_hash(char *str)
{
    uint64_t hash = 5381;
    size_t c;

    while ((c = *str++))
    {
        hash = ((hash << 5) + hash) + c; /* hash * 33 + c */
    }

    return hash;
}