az_strchr.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"
#include <stdlib.h>
 
char *az_strchr(const char *s, int c)
{
    char *tmp;
    int i;
    int track;
 
    tmp = (char *)malloc(sizeof(char) * az_strlen(s));
    i = 0;
    track = 0;
    if ((char)s[i] == '\0')
        return (NULL);
    while (s[i] != '\0' && s[i] != c)
        i++;
    if (s[i] != '\0')
        i = i - 1;
    while (s[i] != '\0')
    {
        tmp[track] = (char)s[i];
        i++;
        track++;
    }
    tmp[track] = '\0';
    if (track == 0)
        return (NULL);
    return (tmp);
}