ft_itoa.c File Reference

#include "ft_string.h"
#include <stdlib.h>

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Macros
#define	NUM_STR_BUF_LEN   (12)

Functions
static char *	reverse_str (char *str)
static long	ft_absl (long v)
char *	ft_itoa (int n)

Macro Definition Documentation

NUM_STR_BUF_LEN

#define NUM_STR_BUF_LEN   (12)

Definition at line 16 of file ft_itoa.c.

Function Documentation

ft_absl()

static long ft_absl ( long  v )

static

Definition at line 40 of file ft_itoa.c.

{
    if (v >= 0)
        return (v);
    else
        return (v * -1);
}

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ft_itoa()

char* ft_itoa

(

int

n

)

Definition at line 48 of file ft_itoa.c.

{
    char    num_str_buf[NUM_STR_BUF_LEN];
    int     buf_pos;
    long    long_n;
 
    if (n == 0)
        return (ft_strdup("0"));
    buf_pos = 0;
    long_n = ft_absl(n);
    while (long_n != 0)
    {
        num_str_buf[buf_pos++] = (long_n % 10) + '0';
        long_n /= 10;
    }
    if (n < 0)
        num_str_buf[buf_pos++] = '-';
    num_str_buf[buf_pos] = '\0';
    return (reverse_str(ft_strdup(num_str_buf)));
}

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reverse_str()

static char* reverse_str ( char *  str )

static

Definition at line 18 of file ft_itoa.c.

{
    char    *str_top;
    char    *str_end;
    char    tmp;
 
    if (str == NULL)
        return (NULL);
    str_top = str;
    str_end = str;
    while (*str_end != '\0')
        str_end++;
    str_end -= 1;
    while (str_top < str_end)
    {
        tmp = *str_end;
        *str_end-- = *str_top;
        *str_top++ = tmp;
    }
    return (str);
}

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