minishell/src/postprocess/fieldsplit/fieldsplit.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   fieldsplit.c                                       :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: khais <marvin@42.fr>                       +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2025/04/03 15:48:52 by khais             #+#    #+#             */
/*   Updated: 2025/04/21 11:56:26 by khais            ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "fieldsplit.h"
#include "../../buffer/buffer.h"
#include "../../parser/matchers/blank.h"
#include "redirect_fieldsplit.h"
#include <stdlib.h>

static bool	should_delimit(t_worddesc *original, size_t i)
{
	if (is_blank(original->word[i]) && original->marker[i] == '$')
		return (true);
	return (false);
}

static void	fieldsplit_delimit(t_buffer *word, t_buffer *marker,
	t_worddesc *original, t_wordlist **outlist)
{
	t_worddesc	*out;

	out = worddesc_create(word->buffer, original->flags, marker->buffer,
			WORD_TOKEN);
	(*outlist) = wordlist_push(*outlist, out);
	free(word);
	free(marker);
}

t_wordlist	*minishell_fieldsplit(t_worddesc *original,
	t_wordlist **outlist)
{
	size_t		i;
	t_buffer	*word;
	t_buffer	*marker;

	i = 0;
	word = ft_buffer_new();
	marker = ft_buffer_new();
	while (original->word[i] != '\0')
	{
		if (should_delimit(original, i))
		{
			fieldsplit_delimit(word, marker, original, outlist);
			word = ft_buffer_new();
			marker = ft_buffer_new();
			while (should_delimit(original, i))
				i++;
		}
		else
		{
			word = ft_buffer_pushchar(word, original->word[i]);
			marker = ft_buffer_pushchar(marker, original->marker[i++]);
		}
	}
	fieldsplit_delimit(word, marker, original, outlist);
	return (*outlist);
}

static t_wordlist	*wordlist_fieldsplit(t_wordlist **original)
{
	t_worddesc	*current;
	t_wordlist	*out;

	if (original == NULL || *original == NULL)
		return (NULL);
	out = NULL;
	current = wordlist_pop(original);
	while (current != NULL)
	{
		if (minishell_fieldsplit(current, &out) == NULL)
		{
			wordlist_destroy(out);
			return (NULL);
		}
		worddesc_destroy(current);
		current = wordlist_pop(original);
	}
	(*original) = out;
	return (*original);
}

t_simple_cmd	*simple_cmd_fieldsplit(t_simple_cmd *cmd)
{
	if (cmd == NULL)
		return (NULL);
	if (wordlist_fieldsplit(&cmd->words) == NULL)
		return (NULL);
	if (redirect_fieldsplit(cmd) == NULL)
		return (NULL);
	return (cmd);
}