ft_atoi.c File Reference

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Functions
int	ft_atoi (const char *str)
	Converts an ASCII string to an int value.

Function Documentation

ft_atoi()

int ft_atoi

(

const char *

str

)

Converts an ASCII string to an int value.

Skips leading whitespace, parses an optional sign, then accumulates consecutive decimal digits.

Parameters

str	Input C string.

Returns

Parsed integer value.

Definition at line 22 of file ft_atoi.c.

{
    int     res;
    int     sign;
    int     i;
 
    res = 0;
    sign = 1;
    i = 0;
    while ((str[i] >= 9 && str[i] <= 13) || str[i] == 32)
        i++;
    if (str[i] == '-' || str[i] == '+')
    {
        if (str[i] == '-')
            sign = -1;
        i++;
    }
    while (str[i] >= '0' && str[i] <= '9')
    {
        res = res * 10 + (str[i] - '0');
        i++;
    }
    return (res * sign);
}