az_atoi.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"
 
int az_atoi(const char *s)
{
    int i;
    int conv;
    int res;
    int neg_chk;
 
    i = 0;
    conv = 0;
 
    neg_chk = 1;
 
    if (s == NULL)
        return (0);
 
    if (s[i] == '-')
    {
        neg_chk = -1;
        i++;
    }
    else if (s[i] == '+')
        i++;
 
    while (s[i] >= 48 && s[i] <= 57)
    {
        conv = conv * 10 + s[i++] - 48;
    }
    res = conv * neg_chk;
    return (res);
}