feat(vars): vars

src/utils/vars/vars.c

@@ -0,0 +1,32 @@
+#define _POSIX_C_SOURCE 200809L
+#include "vars.h"
+
+#include <stdbool.h>
+#include <stddef.h>
+#include <string.h>
+
+#include "../hash_map/hash_map.h"
+
+#define VARS_INITIAL_SIZE 16
+
+struct hash_map *vars_init(void)
+{
+    return hash_map_init(VARS_INITIAL_SIZE);
+}
+
+char *get_var(const struct hash_map *vars, const char *key)
+{
+    return (char *)hash_map_get(vars, key);
+}
+
+bool set_var(struct hash_map *vars, const char *key, const char *value)
+{
+    if (key == NULL || value == NULL)
+        return false;
+    return hash_map_insert(vars, key, (void *)value, NULL);
+}
+
+bool set_var_copy(struct hash_map *vars, const char *key, const char *value)
+{
+    return set_var(vars, strdup(key), strdup(value));
+}

src/utils/vars/vars.h

@@ -0,0 +1,31 @@
+#ifndef VARS_H
+#define VARS_H
+
+#include <stdbool.h>
+
+#include "../hash_map/hash_map.h"
+
+/**
+ * Initialize a new variables hash map.
+ */
+struct hash_map *vars_init(void);
+
+/**
+ * Get the value of a variable, NULL if not found.
+ */
+char *get_var(const struct hash_map *vars, const char *key);
+
+/**
+ * Set the value of a variable. Key and value ownership are transferred to
+ * the hash_map and need to be on the heap. Returns true on success, false on
+ * failure.
+ */
+bool set_var(struct hash_map *vars, const char *key, const char *value);
+
+/**
+ * Same as set_var, but makes copies of key and value so you don't have to worry
+ * about their memory management. Returns true on success, false on failure.
+ */
+bool set_var_copy(struct hash_map *vars, const char *key, const char *value);
+
+#endif /* ! VARS_H */