ft_split.c

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/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_split.c                                         :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: tspoof <tspoof@student.hive.fi>            +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2022/11/05 15:50:56 by tspoof            #+#    #+#             */
/*   Updated: 2022/11/30 17:07:36 by tspoof           ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */
 
#include "libft.h"
 
static int  ft_free_all(char **arr)
{
    while (*arr)
    {
        free(*arr);
        arr++;
    }
    return (0);
}
 
static int  ft_split_count(const char *s, char c)
{
    int i;
    int count;
 
    i = 0;
    count = 0;
    while (s[i])
    {
        while (s[i] && s[i] == c)
            i++;
        while (s[i] && s[i] != c)
            i++;
        if (s[i - 1] != c)
            count++;
    }
    return (count);
}
 
static int  ft_splitter(char const *s, char c, char **arr, int split_count)
{
    int     i;
    int     i_prev;
    int     arr_i;
    int     size;
 
    i = 0;
    i_prev = 0;
    arr_i = 0;
    while (arr_i < split_count)
    {
        while (s[i] && s[i] == c)
            i++;
        i_prev = i;
        while (s[i] && s[i] != c)
            i++;
        size = i - i_prev;
        arr[arr_i] = (char *)malloc((size + 1) * sizeof(char));
        if (!arr[arr_i])
            return (ft_free_all(arr));
        ft_strlcpy(arr[arr_i], s + i_prev, size + 1);
        arr_i++;
    }
    return (1);
}
 
char    **ft_split(char const *s, char c)
{
    char    **arr;
    int     split_count;
 
    if (!s)
        return (NULL);
    split_count = ft_split_count(s, c);
    arr = (char **)ft_calloc(split_count + 1, sizeof(char *));
    if (!arr)
        return (NULL);
    if (!ft_splitter(s, c, arr, split_count))
    {
        free(arr);
        return (NULL);
    }
    return (arr);
}