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/*
see copyright notice in squirrel.h
*/
#include "sqpcheader.h"
#include "sqvm.h"
#include "sqtable.h"
#include "sqclass.h"
#include "sqfuncproto.h"
#include "sqclosure.h"
SQClass::SQClass(SQSharedState *ss,SQClass *base)
{
_base = base;
_typetag = 0;
_hook = NULL;
_udsize = 0;
_locked = false;
_constructoridx = -1;
if(_base) {
_constructoridx = _base->_constructoridx;
_udsize = _base->_udsize;
_defaultvalues.copy(base->_defaultvalues);
_methods.copy(base->_methods);
_COPY_VECTOR(_metamethods,base->_metamethods,MT_LAST);
__ObjAddRef(_base);
}
_members = base?base->_members->Clone() : SQTable::Create(ss,0);
__ObjAddRef(_members);
INIT_CHAIN();
ADD_TO_CHAIN(&_sharedstate->_gc_chain, this);
}
void SQClass::Finalize() {
_attributes.Null();
_defaultvalues.resize(0);
_methods.resize(0);
_NULL_SQOBJECT_VECTOR(_metamethods,MT_LAST);
__ObjRelease(_members);
if(_base) {
__ObjRelease(_base);
}
}
SQClass::~SQClass()
{
REMOVE_FROM_CHAIN(&_sharedstate->_gc_chain, this);
Finalize();
}
bool SQClass::NewSlot(SQSharedState *ss,const SQObjectPtr &key,const SQObjectPtr &val,bool bstatic)
{
SQObjectPtr temp;
bool belongs_to_static_table = type(val) == OT_CLOSURE || type(val) == OT_NATIVECLOSURE || bstatic;
if(_locked && !belongs_to_static_table)
return false; //the class already has an instance so cannot be modified
if(_members->Get(key,temp) && _isfield(temp)) //overrides the default value
{
_defaultvalues[_member_idx(temp)].val = val;
return true;
}
if(belongs_to_static_table) {
SQInteger mmidx;
if((type(val) == OT_CLOSURE || type(val) == OT_NATIVECLOSURE) &&
(mmidx = ss->GetMetaMethodIdxByName(key)) != -1) {
_metamethods[mmidx] = val;
}
else {
SQObjectPtr theval = val;
if(_base && type(val) == OT_CLOSURE) {
theval = _closure(val)->Clone();
_closure(theval)->_base = _base;
__ObjAddRef(_base); //ref for the closure
}
if(type(temp) == OT_NULL) {
bool isconstructor;
SQVM::IsEqual(ss->_constructoridx, key, isconstructor);
if(isconstructor) {
_constructoridx = (SQInteger)_methods.size();
}
SQClassMember m;
m.val = theval;
_members->NewSlot(key,SQObjectPtr(_make_method_idx(_methods.size())));
_methods.push_back(m);
}
else {
_methods[_member_idx(temp)].val = theval;
}
}
return true;
}
SQClassMember m;
m.val = val;
_members->NewSlot(key,SQObjectPtr(_make_field_idx(_defaultvalues.size())));
_defaultvalues.push_back(m);
return true;
}
SQInstance *SQClass::CreateInstance()
{
if(!_locked) Lock();
return SQInstance::Create(_opt_ss(this),this);
}
SQInteger SQClass::Next(const SQObjectPtr &refpos, SQObjectPtr &outkey, SQObjectPtr &outval)
{
SQObjectPtr oval;
SQInteger idx = _members->Next(false,refpos,outkey,oval);
if(idx != -1) {
if(_ismethod(oval)) {
outval = _methods[_member_idx(oval)].val;
}
else {
SQObjectPtr &o = _defaultvalues[_member_idx(oval)].val;
outval = _realval(o);
}
}
return idx;
}
bool SQClass::SetAttributes(const SQObjectPtr &key,const SQObjectPtr &val)
{
SQObjectPtr idx;
if(_members->Get(key,idx)) {
if(_isfield(idx))
_defaultvalues[_member_idx(idx)].attrs = val;
else
_methods[_member_idx(idx)].attrs = val;
return true;
}
return false;
}
bool SQClass::GetAttributes(const SQObjectPtr &key,SQObjectPtr &outval)
{
SQObjectPtr idx;
if(_members->Get(key,idx)) {
outval = (_isfield(idx)?_defaultvalues[_member_idx(idx)].attrs:_methods[_member_idx(idx)].attrs);
return true;
}
return false;
}
///////////////////////////////////////////////////////////////////////
void SQInstance::Init(SQSharedState *ss)
{
_userpointer = NULL;
_hook = NULL;
__ObjAddRef(_class);
_delegate = _class->_members;
INIT_CHAIN();
ADD_TO_CHAIN(&_sharedstate->_gc_chain, this);
}
SQInstance::SQInstance(SQSharedState *ss, SQClass *c, SQInteger memsize)
{
_memsize = memsize;
_class = c;
SQUnsignedInteger nvalues = _class->_defaultvalues.size();
for(SQUnsignedInteger n = 0; n < nvalues; n++) {
new (&_values[n]) SQObjectPtr(_class->_defaultvalues[n].val);
}
Init(ss);
}
SQInstance::SQInstance(SQSharedState *ss, SQInstance *i, SQInteger memsize)
{
_memsize = memsize;
_class = i->_class;
SQUnsignedInteger nvalues = _class->_defaultvalues.size();
for(SQUnsignedInteger n = 0; n < nvalues; n++) {
new (&_values[n]) SQObjectPtr(i->_values[n]);
}
Init(ss);
}
void SQInstance::Finalize()
{
SQUnsignedInteger nvalues = _class->_defaultvalues.size();
__ObjRelease(_class);
_NULL_SQOBJECT_VECTOR(_values,nvalues);
//for(SQUnsignedInteger i = 0; i < nvalues; i++) {
// _values[i].Null();
// }
}
SQInstance::~SQInstance()
{
REMOVE_FROM_CHAIN(&_sharedstate->_gc_chain, this);
if(_class){ Finalize(); } //if _class is null it was already finalized by the GC
}
bool SQInstance::GetMetaMethod(SQVM *v,SQMetaMethod mm,SQObjectPtr &res)
{
if(type(_class->_metamethods[mm]) != OT_NULL) {
res = _class->_metamethods[mm];
return true;
}
return false;
}
bool SQInstance::InstanceOf(SQClass *trg)
{
SQClass *parent = _class;
while(parent != NULL) {
if(parent == trg)
return true;
parent = parent->_base;
}
return false;
}
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