1 files changed, 74 insertions, 0 deletions
diff --git a/hashmap.c b/hashmap.c
new file mode 100644
index 0000000..3d9edd0
--- /dev/null
+++ b/hashmap.c
@@ -0,0 +1,74 @@
+#include <string.h>
+#include <stdlib.h>
+#include <err.h>
+#include "hashmap.h"
+
+struct node {
+    char *key;
+    void *value;
+    struct node *next;
+};
+
+struct hashmap *hashmap_new() {
+    struct hashmap *hm = malloc(sizeof *hm);
+    if (!hm) err(EXIT_FAILURE, "out of memory");
+    for (int i=0; i < 26; i++) {
+        hm->buckets[i] = NULL;
+    }
+
+    return hm;
+}
+
+void hashmap_insert(struct hashmap *hm, char *key, void *value) {
+    int pos = (key[0] - 'a') % 26;
+    struct node *head = hm->buckets[pos];
+    struct node *node = head;
+
+    while (node) {
+        if (strcmp(node->key, key) == 0) {
+            node->value = value;
+            return;
+        }
+        node = node->next;
+    }
+    
+    node = malloc(sizeof *node);
+    node->key = key;
+    node->value = value;
+    node->next = head;
+    hm->buckets[pos] = node;
+}
+
+void *hashmap_get(struct hashmap *hm, char *key) {
+    int pos = (key[0] - 'a') % 26;
+    struct node *node = hm->buckets[pos];
+    while (node) {
+        if (strcmp(node->key, key) == 0) {
+            return node->value;
+        }
+
+        node = node->next;
+    }
+
+    return NULL;
+}
+
+void hashmap_remove(char *key) {
+
+}
+
+void hashmap_free(struct hashmap *hm) {
+    struct node *node;
+    struct node *next;
+
+    for (int i=0; i < 26; i++) {
+        node = hm->buckets[i];
+        while (node) {
+            next = node->next;
+            free(node);            
+            node = next;
+        }
+    }
+
+    free(hm);
+}
+\ No newline at end of file