String interning, forgot file

src/text_editor/intern_table.cpp

@@ -0,0 +1,23 @@
+struct InternTable {
+    Table<String> strings;
+    Arena        *arena;
+};
+
+String Intern(InternTable *table, String string) {
+    if (table->arena == NULL) {
+        table->arena             = AllocArena();
+        table->strings.allocator = *table->arena;
+    }
+    String *value = table->strings.get(string);
+    if (!value) {
+        String copy = Copy(*table->arena, string);
+        table->strings.put(copy, copy);
+        return copy;
+    }
+    return *value;
+}
+
+// We use the intern table to optimize for space, I don't want to worry about freeing
+// buffer names and event text data so let it all accumulate and interning will at least
+// optimize worst offenders (like event text)
+InternTable GlobalInternTable;