95 lines
2.1 KiB
C
95 lines
2.1 KiB
C
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#include <stdio.h>
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#include <string.h>
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#include "memory.h"
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#include "object.h"
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#include "table.h"
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#include "value.h"
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#include "vm.h"
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#define ALLOCATE_OBJ(type, objectType) \
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(type*)allocateObject(sizeof(type), objectType)
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static Obj* allocateObject(size_t size, ObjType type) {
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Obj* object = (Obj*) reallocate(NULL, 0, size);
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object->type = type;
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object->next = vm.objects;
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vm.objects = object;
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return object;
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}
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static ObjString* allocateString(char* chars, int length, uint32_t hash) {
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ObjString* string = ALLOCATE_OBJ(ObjString, OBJ_STRING);
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string->length = length;
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string->chars = chars;
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string->hash = hash;
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tableSet(&vm.strings, OBJ_VAL(string), NIL_VAL);
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return string;
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}
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static uint32_t hashString(const char* key, int length) {
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uint32_t hash = 2166136261u;
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for (int i = 0; i < length; i++) {
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hash ^= key[i];
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hash *= 16777619;
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}
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return hash;
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}
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ObjArray* takeArray(ValueArray* valArray) {
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ObjArray* array = ALLOCATE_OBJ(ObjArray, OBJ_ARRAY);
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array->array = valArray;
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return array;
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}
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ObjHash* takeHash(Table* hashTable) {
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ObjHash* hash = ALLOCATE_OBJ(ObjHash, OBJ_HASH);
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hash->hashTable = hashTable;
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return hash;
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}
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ObjString* takeString(char* chars, int length) {
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uint32_t hash = hashString(chars, length);
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return allocateString(chars, length, hash);
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}
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ObjString* copyString(const char* chars, int length) {
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uint32_t hash = hashString(chars, length);
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ObjString* interned = tableFindString(&vm.strings, chars, length, hash);
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if (interned != NULL) return interned;
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char* heapChars = ALLOCATE(char, length + 1);
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memcpy(heapChars, chars, length);
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heapChars[length] = '\0';
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return allocateString(heapChars, length, hash);
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}
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void printObject(Value value) {
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switch (OBJ_TYPE(value)) {
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case OBJ_STRING:
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printf("%s", AS_CSTRING(value));
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break;
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case OBJ_ARRAY:
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printf("[");
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ValueArray* array=AS_VARRAY(value);
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for (int i=0;i<array->count;i++) {
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printValue(array->values[i]);
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if (i<(array->count-1)) {
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printf(", ");
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}
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}
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printf("]");
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break;
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case OBJ_HASH:
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printf("hash");
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break;
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}
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}
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