42_minishell/env_fill.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   env_fill.c                                         :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: cchauvet <cchauvet@student.42angoulem      +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2023/02/16 16:29:08 by cchauvet          #+#    #+#             */
/*   Updated: 2023/02/20 15:39:28 by starnakin        ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "minishell.h"

static char	*ft_get_value(t_list **env, char *key)
{
	char	*value;

	value = get_value_by_key(key, env);
	if (value == NULL)
		value = "";
	return (value);
}

static char	*ft_get_key(char *str)
{
	char	*key;
	size_t	i;

	i = 1;
	if (ft_strncmp(str, "$$", 2) == 0)
	{
		key = ft_strdup("$");
		if (key == NULL)
			ft_eprintf("minishell: malloc failed\n");
		return (key);
	}
	if (str[i] == ' ' || str[i] == '\0')
	{
		key = ft_strdup("");
		if (key == NULL)
			ft_eprintf("minishell: malloc failed\n");
		return (key);
	}
	while (str[i] != '\0' && str[i] != '$' && str[i] != ' '
		&& str[i] != '"')
			i++;
	key = ft_strndup(str + 1, i - 1);
	if (key == NULL)
		ft_eprintf("minishell: malloc failed\n");
	return (key);
}

char	*ft_env_filler(t_list **env, const char *str)
{
	size_t	i;
	char	*key;
	char	*out;
	char	*temp;
	char	*value;

	out = ft_strdup(str);
	if (out == NULL)
	{
		ft_eprintf("minishell: malloc failed\n");
		return (NULL);
	}
	i = 0;
	while (out[i] != '\0')
	{
		while (ft_is_in_quote(out, i) == 1)
			i++;
		while (out[i] == '$')
		{
			key = ft_get_key(out + i);
			if (key == NULL)
			{
				free(out);
				return (NULL);
			}
			value = ft_get_value(env, key);
			if (value == NULL)
			{
				free(key);
				free(out);
				return (NULL);
			}
			temp = ft_strreplace(out, value, i, ft_strlen(key) + 1 + i);
			free(key);
			i = i + ft_strlen(value);
			free(out);
			if (temp == NULL)
			{
				ft_eprintf("minishell: malloc failed\n");
				return (NULL);
			}
			out = temp;
		}
		if (out[i] != '\0')
			i++;
	}
	return (out);
}