init

The-Nook-GamesTM/Fundamentals/expansion_aux.c

@@ -0,0 +1,66 @@
+#include "expansion.h"
+
+#include <stdlib.h>
+#include <string.h>
+
+struct var *var_add(struct var *list, const char *key, const char *value) {
+    struct var *node = malloc(sizeof(struct var));
+    if (!node)
+        return NULL;
+    node->key = strdup(key);
+    node->value = strdup(value);
+    if (!node->key || !node->value) {
+        free(node->key);
+        free(node->value);
+        free(node);
+        return NULL;
+    }
+    node->next = list;
+    return node;
+}
+
+const char *var_get(struct var *list, const char *key) {
+    while (list)
+    {
+        if (strcmp(list->key, key) == 0)
+            return list->value;
+        list = list->next;
+    }
+    return NULL;
+}
+
+size_t var_size(struct var *list) {
+    size_t n = 0;
+    while (list)
+    {
+        n++;
+        list = list->next;
+    }
+    return n;
+}
+
+int var_update(struct var *list, const char *key, const char *value) {
+    while (list)
+    {
+        if (strcmp(list->key, key) == 0) {
+            char *new_val = strdup(value);
+            if (!new_val)
+                return -1;
+            free(list->value);
+            list->value = new_val;
+            return 0;
+        }
+        list = list->next;
+    }
+    return -1;
+}
+
+void var_free(struct var *list) {
+    while (list) {
+        struct var *next = list->next;
+        free(list->key);
+        free(list->value);
+        free(list);
+        list = next;
+    }
+}