Create object.c

Author: AzliRynz

object.c

@@ -0,0 +1,59 @@
+#include "object.h"
+#include "vm.h"
+#include "memory.h"
+#include <string.h>
+#include <stdio.h>
+
+static uint32_t hashString(const char* key, int length) {
+    uint32_t hash = 2166136261u;
+    for (int i = 0; i < length; i++) {
+        hash ^= (uint8_t)key[i];
+        hash *= 16777619;
+    }
+    return hash;
+}
+
+ObjString* takeString(VM* vm, char* chars, int length) {
+    uint32_t hash = hashString(chars, length);
+    
+    ObjString* string = ALLOCATE_OBJ(vm, ObjString, OBJ_STRING);
+    string->length = length;
+    string->chars = chars;
+    string->hash = hash;
+    
+    return string;
+}
+
+ObjString* copyString(VM* vm, const char* chars, int length) {
+    uint32_t hash = hashString(chars, length);
+    
+    char* heapChars = ALLOCATE(vm, char, length + 1);
+    memcpy(heapChars, chars, length);
+    heapChars[length] = '\0';
+    
+    ObjString* string = ALLOCATE_OBJ(vm, ObjString, OBJ_STRING);
+    string->length = length;
+    string->chars = heapChars;
+    string->hash = hash;
+    
+    return string;
+}
+
+void printObject(Value value) {
+    switch (OBJ_TYPE(value)) {
+        case OBJ_STRING:
+            printf("%s", AS_CSTRING(value));
+            break;
+    }
+}
+
+void freeObject(VM* vm, Obj* object) {
+    switch (object->type) {
+        case OBJ_STRING: {
+            ObjString* string = (ObjString*)object;
+            FREE_ARRAY(vm, char, string->chars, string->length + 1);
+            FREE(vm, ObjString, object);
+            break;
+        }
+    }
+}