130 lines
3.7 KiB
C
130 lines
3.7 KiB
C
#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include "memory.h"
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#include "object.h"
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#include "value.h"
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#include "vm.h"
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#include "table.h"
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#define ALLOCATE_OBJECT(type, objectType) \
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(type*)allocateObject(sizeof(type), objectType)
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static KrkObj * allocateObject(size_t size, ObjType type) {
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KrkObj * object = (KrkObj*)krk_reallocate(NULL, 0, size);
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object->type = type;
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object->isMarked = 0;
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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 KrkString * allocateString(char * chars, size_t length, uint32_t hash) {
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KrkString * string = ALLOCATE_OBJECT(KrkString, 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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krk_push(OBJECT_VAL(string));
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krk_tableSet(&vm.strings, OBJECT_VAL(string), NONE_VAL());
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krk_pop();
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return string;
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}
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static uint32_t hashString(const char * key, size_t length) {
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uint32_t hash = 0;
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/* This is the so-called "sdbm" hash. It comes from a piece of
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* public domain code from a clone of ndbm. */
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for (size_t i = 0; i < length; ++i) {
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hash = (int)key[i] + (hash << 6) + (hash << 16) - hash;
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}
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return hash;
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}
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KrkString * krk_takeString(char * chars, size_t length) {
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uint32_t hash = hashString(chars, length);
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KrkString * interned = krk_tableFindString(&vm.strings, chars, length, hash);
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if (interned != NULL) {
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FREE_ARRAY(char, chars, length + 1);
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return interned;
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}
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return allocateString(chars, length, hash);
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}
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KrkString * krk_copyString(const char * chars, size_t length) {
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uint32_t hash = hashString(chars, length);
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KrkString * interned = krk_tableFindString(&vm.strings, chars, length, hash);
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if (interned) 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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KrkFunction * krk_newFunction() {
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KrkFunction * function = ALLOCATE_OBJECT(KrkFunction, OBJ_FUNCTION);
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function->requiredArgs = 0;
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function->keywordArgs = 0;
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function->upvalueCount = 0;
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function->name = NULL;
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function->docstring = NULL;
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function->collectsArguments = 0;
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function->collectsKeywords = 0;
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krk_initValueArray(&function->requiredArgNames);
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krk_initValueArray(&function->keywordArgNames);
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krk_initChunk(&function->chunk);
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return function;
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}
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KrkNative * krk_newNative(NativeFn function, const char * name, int type) {
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KrkNative * native = ALLOCATE_OBJECT(KrkNative, OBJ_NATIVE);
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native->function = function;
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native->isMethod = type;
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native->name = name;
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return native;
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}
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KrkClosure * krk_newClosure(KrkFunction * function) {
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KrkUpvalue ** upvalues = ALLOCATE(KrkUpvalue*, function->upvalueCount);
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for (size_t i = 0; i < function->upvalueCount; ++i) {
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upvalues[i] = NULL;
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}
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KrkClosure * closure = ALLOCATE_OBJECT(KrkClosure, OBJ_CLOSURE);
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closure->function = function;
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closure->upvalues = upvalues;
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closure->upvalueCount = function->upvalueCount;
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return closure;
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}
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KrkUpvalue * krk_newUpvalue(int slot) {
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KrkUpvalue * upvalue = ALLOCATE_OBJECT(KrkUpvalue, OBJ_UPVALUE);
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upvalue->location = slot;
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upvalue->next = NULL;
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upvalue->closed = NONE_VAL();
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return upvalue;
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}
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KrkClass * krk_newClass(KrkString * name) {
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KrkClass * _class = ALLOCATE_OBJECT(KrkClass, OBJ_CLASS);
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_class->name = name;
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_class->filename = NULL;
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_class->docstring = NULL;
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_class->base = NULL;
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krk_initTable(&_class->methods);
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return _class;
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}
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KrkInstance * krk_newInstance(KrkClass * _class) {
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KrkInstance * instance = ALLOCATE_OBJECT(KrkInstance, OBJ_INSTANCE);
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instance->_class = _class;
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krk_initTable(&instance->fields);
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return instance;
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}
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KrkBoundMethod * krk_newBoundMethod(KrkValue receiver, KrkObj * method) {
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KrkBoundMethod * bound = ALLOCATE_OBJECT(KrkBoundMethod, OBJ_BOUND_METHOD);
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bound->receiver = receiver;
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bound->method = method;
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return bound;
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}
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