update: builtins hashmap initialized and moved env hashmap initialization to set_envp()

src/variables/environment.c

@@ -0,0 +1,179 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   environment.c                                      :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: sede-san <sede-san@student.42madrid.com    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2025/12/01 09:12:39 by sede-san          #+#    #+#             */
+/*   Updated: 2025/12/01 17:27:57 by sede-san         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "minishell.h"
+
+/**
+ * @brief Parses and stores environment variables from envp array into a hashmap
+ *
+ * This function iterates through the environment variables array (envp) and
+ * splits each variable string on the '=' delimiter to separate the variable
+ * name from its value. Each name-value pair is then stored in the minishell's
+ * environment hashmap for later retrieval.
+ *
+ * @param envp Array of environment variable strings in "NAME=value" format
+ * @param msh  Pointer to the minishell structure containing the environment
+ *             hashmap
+ *
+ * @note The function assumes envp strings are in the standard format
+ *       "NAME=value"
+ */
+void	set_envp(
+	char **envp,
+	t_minishell *msh
+) {
+	char	**splitted_env;
+
+	msh->variables.environment
+		= ft_hashmap_new(32, ft_hashmap_hashstr, ft_hashmap_strcmp);
+	if (msh == NULL)
+	{
+		ft_hashmap_clear(&msh->variables.environment, free);
+		return ;
+	}
+	while (*envp != NULL)
+	{
+		splitted_env = ft_split(*envp, '=');
+		if (splitted_env == NULL)
+		{
+			ft_hashmap_clear(&msh->variables.environment, free);
+			return ;
+		}
+		ft_hashmap_put(msh->variables.environment,
+			ft_strdup(splitted_env[0]), ft_strdup(splitted_env[1]));
+		ft_free_split(splitted_env);
+		envp++;
+	}
+}
+
+/**
+ * @brief Sets an environment variable in the minishell's environment hashmap.
+ *
+ * This function adds a new environment variable or updates an existing one
+ * in the minishell's environment hashmap. If the variable already exists,
+ * the old value is freed to prevent memory leaks. If the variable is new,
+ * a duplicate of the key name is created for storage.
+ *
+ * @param env_name  The name of the environment variable to set
+ * @param env_value The value to assign to the environment variable
+ * @param msh       Pointer to the minishell structure containing the
+ *                  environment hashmap
+ */
+void	set_env(
+	const char *env_name,
+	char *env_value,
+	t_minishell *msh
+) {
+	t_hashmap	*environment;
+	const char	*key;
+	char		*old_value;
+
+	environment = msh->variables.environment;
+	key = env_name;
+	if (!ft_hashmap_contains_key(environment, key))
+		key = ft_strdup(env_name);
+	old_value = ft_hashmap_put(environment, key, ft_strdup(env_value));
+	if (old_value != NULL)
+		free(old_value);
+}
+
+/**
+ * @brief Converts the environment variables hashmap to an envp array format.
+ *
+ * This function extracts all environment variables from the minishell's
+ * environment hashmap and converts them into a NULL-terminated array of
+ * strings in the format "KEY=VALUE".
+ *
+ * @param msh Pointer to the minishell structure containing the environment
+ *            variables hashmap.
+ *
+ * @return A dynamically allocated array of strings representing environment
+ *         variables in "KEY=VALUE" format, terminated by NULL. Returns NULL
+ *         if memory allocation fails. The caller is responsible for freeing
+ *         the returned array and its individual string elements using
+ *         the `free_envp()` function.
+ *
+ * @note The function allocates memory for both the array and individual
+ *       strings using malloc and ft_strnjoin respectively.
+ * @note The returned array size is environment->size + 1 to accommodate
+ *       the NULL terminator.
+ */
+char	**get_envp(
+	t_minishell *msh
+) {
+	char		**envp;
+	t_list		*env_list;
+	t_list		*env;
+	t_map_entry	*entry;
+	size_t		i;
+
+	env_list = ft_hashmap_entries(msh->variables.environment);
+	envp = (char **)malloc(
+		(msh->variables.environment->size + 1) * sizeof(char *));
+	if (envp != NULL)
+	{
+		i = 0;
+		env = env_list;
+		while (env != NULL)
+		{
+			entry = env->content;
+			envp[i++] = ft_strnjoin(3, entry->key, "=", entry->value);
+			env = env->next;
+		}
+		envp[i] = NULL;
+	}
+	ft_lstclear_nodes(&env_list);
+	return (envp);
+}
+
+/**
+ * @brief Frees a dynamically allocated environment variables array
+ *
+ * This function deallocates memory for an array of strings that was previously
+ * allocated by `get_envp()`. It iterates through each string in the array,
+ * frees the memory for individual strings, and then frees the array itself.
+ *
+ * @param envp Pointer to the array of environment variable strings to be freed.
+ *             Each string in the array should be dynamically allocated.
+ *             The array must be NULL-terminated.
+ */
+void	free_envp(
+	char **envp
+) {
+	size_t	i;
+
+	i = -1;
+	while (envp[++i] != NULL)
+		free(envp[i]);
+	free(envp);
+}
+
+/**
+ * @brief Retrieves the value of an environment variable from the shell's
+ *        environment hashmap.
+ *
+ * This function searches for the specified environment variable name in the
+ * minishell's environment variable hashmap and returns its associated value.
+ *
+ * @param env_name The name of the environment variable to retrieve (e.g.,
+ *                 "PATH", "HOME")
+ * @param msh      Pointer to the minishell structure containing the environment
+ *                 variables hashmap
+ *
+ * @return The value of the environment variable if found, NULL if not found
+ */
+char	*get_env(
+	const char *env_name,
+	t_minishell *msh
+) {
+	return (ft_hashmap_get(msh->variables.environment, env_name));
+}