az_strsub.c

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// kernel_lib_printf_functions
/*
 * Kernel Lib Printf Functions
 *
 * Maintainer: Park Jiwoo
 *
 * Copyright (C) 2024 Park-Jiwoo
 *
 */
#include "kernel_pr_he.h"
 
char *az_strsub(char const *s, unsigned int start, size_t len)
{
    size_t i;
    char *tmp;
 
    i = 0;
    tmp = az_memalloc(len + 1);
 
    if (tmp == NULL)
        return (NULL);
 
    while (i < len)
    {
        tmp[i] = s[start + i];
        i++;
    }
 
    tmp[i] = '\0';
    return (tmp);
}