parser_utils1.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   parser_utils1.c                                    :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: yucchen <yucchen@student.42singapore.sg    +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2026/01/07 12:11:47 by sileow            #+#    #+#             */
/*   Updated: 2026/01/09 14:37:28 by yucchen          ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "parser.h"

// string list helper for argv
int	add_arg(t_strlist **args, const char *value)
{
	t_strlist	*node;
	t_strlist	*temp;

	node = malloc(sizeof(t_strlist));
	if (!node)
		return (0);
	node->str = ft_strdup(value);
	if (!node->str)
	{
		free(node);
		return (0);
	}
	node->next = NULL;
	if (!*args)
		*args = node;
	else
	{
		temp = *args;
		while (temp->next)
			temp = temp->next;
		temp->next = node;
	}
	return (1);
}

static int	strlist_size(t_strlist *args)
{
	int	cnt;

	cnt = 0;
	while (args)
	{
		cnt++;
		args = args->next;
	}
	return (cnt);
}

static void	free_strlist_nodes(t_strlist *lst)
{
	t_strlist	*next;

	while (lst)
	{
		next = lst->next;
		free(lst);
		lst = next;
	}
}

// free nodes + strings
void	free_strlist_all(t_strlist *lst)
{
	t_strlist	*next;

	while (lst)
	{
		next = lst->next;
		free(lst->str);
		free(lst);
		lst = next;
	}
}

char	**strlist_to_argv(t_strlist *args)
{
	t_strlist	*head;
	char		**argv;
	int			size;
	int			i;

	head = args;
	i = 0;
	size = strlist_size(args);
	argv = malloc((size + 1) * sizeof(char *));
	if (!argv)
		return (free_strlist_all(head), NULL);
	while (args)
	{
		argv[i] = args->str;
		i++;
		args = args->next;
	}
	argv[i] = NULL;
	return (free_strlist_nodes(head), argv);
}