add: env management

src/env/env.c

@@ -0,0 +1,121 @@
+#include "env.h"
+#include "../../lib/bozolib/bozolib.h"
+#include <stddef.h>
+#include <stdlib.h>
+#include <string.h>
+
+void env_del(void *ptr)
+{
+	env* content;
+
+	content = ptr;
+	free(content->key);
+	free(content->value);
+	free(content);
+}
+
+static env* create_env_content(const char *key, const char *value)
+{
+	env* out;
+	char *key_dup;
+	char *value_dup;
+
+	out = malloc(sizeof(env));
+	if (out == NULL)
+		return (NULL);
+	key_dup = strdup(key);
+	if (key_dup == NULL)
+	{
+		free(out);
+		return (NULL);
+	}
+	value_dup = strdup(value);
+	if (value_dup == NULL)
+	{
+		free(key_dup);
+		free(out);
+		return (NULL);
+	}
+	out->key = key_dup;
+	out->value = value_dup;
+	return (out);
+}
+
+static lst* create_env(const char* key, const char* value)
+{
+	lst* out = malloc(sizeof(lst));
+	if (out == NULL)
+		return (NULL);
+	out->content = create_env_content(key, value);
+	if (out->content == NULL)
+	{
+		free(out);
+		return (NULL);
+	}
+	out->next = NULL;
+	return (out);
+}
+
+int add_env_variable(lst** root, const char* key, const char *value)
+{
+	lst* element;
+
+	element = create_env(key, value);
+	if (element == NULL)
+		return 1;
+	lst_addback(root, element);
+	return 0;
+}
+
+lst** env_init(const char** env)
+{
+	lst** root;
+	char* equal;
+	char* key;
+	char* value;
+
+	root = malloc(sizeof(lst*));
+	if (root == NULL)
+		return (NULL);
+	*root = NULL;
+	for (size_t i = 0; env[i] != NULL; i++)
+	{
+		equal = strchr(env[i], '=');
+		key = strndup(env[i], equal - env[i]);
+		if (key == NULL)
+		{
+			lst_clear(root, &env_del);
+			return (NULL);
+		}
+		value = strdup(env[i] + (equal - env[i]) + 1);
+		if (value == NULL)
+		{
+			lst_clear(root, &env_del);
+			free(key);
+			return (NULL);
+		}
+		if (add_env_variable(root, key, value))
+		{
+			lst_clear(root, &env_del);
+			free(value);
+			free(key);
+			return (NULL);
+		}
+	}
+	return (root);
+}
+
+char *get_env_variable(lst** root, char* key)
+{
+	lst* current = *root;
+	env *content;
+
+	while (current != NULL)
+	{
+		content = current->content;
+		if (strcmp(content->key, key) == 0)
+			return (content->value);
+		current = current->next;
+	}
+	return (NULL);
+}

src/env/env.h

@@ -1,7 +1,12 @@
 #pragma once
+#include "../../lib/bozolib/bozolib.h"
 
 typedef struct s_env
 {
 	char *key;
 	char *value;
 } env;
+
+int add_env_variable(lst** root, const char *key, const char *value);
+lst** env_init(const char **env);
+void env_del(void *ptr);