539 lines
17 KiB
C++
539 lines
17 KiB
C++
/*
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see copyright notice in squirrel.h
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*/
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#include "sqpcheader.h"
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#include "sqvm.h"
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#include "sqstring.h"
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#include "sqarray.h"
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#include "sqtable.h"
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#include "squserdata.h"
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#include "sqfuncproto.h"
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#include "sqclass.h"
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#include "sqclosure.h"
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SQString *SQString::Create(SQSharedState *ss,const SQChar *s,SQInteger len)
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{
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SQString *str=ADD_STRING(ss,s,len);
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str->_sharedstate=ss;
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return str;
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}
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void SQString::Release()
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{
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REMOVE_STRING(_sharedstate,this);
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}
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SQInteger SQString::Next(const SQObjectPtr &refpos, SQObjectPtr &outkey, SQObjectPtr &outval)
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{
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SQInteger idx = (SQInteger)TranslateIndex(refpos);
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while(idx < _len){
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outkey = (SQInteger)idx;
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outval = SQInteger(_val[idx]);
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//return idx for the next iteration
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return ++idx;
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}
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//nothing to iterate anymore
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return -1;
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}
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SQUnsignedInteger TranslateIndex(const SQObjectPtr &idx)
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{
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switch(type(idx)){
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case OT_NULL:
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return 0;
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case OT_INTEGER:
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return (SQUnsignedInteger)_integer(idx);
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default: assert(0); break;
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}
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return 0;
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}
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SQWeakRef *SQRefCounted::GetWeakRef(SQObjectType type)
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{
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if(!_weakref) {
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sq_new(_weakref,SQWeakRef);
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_weakref->_obj._type = type;
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_weakref->_obj._unVal.pRefCounted = this;
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}
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return _weakref;
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}
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SQRefCounted::~SQRefCounted()
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{
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if(_weakref) {
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_weakref->_obj._type = OT_NULL;
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_weakref->_obj._unVal.pRefCounted = NULL;
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}
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}
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void SQWeakRef::Release() {
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if(ISREFCOUNTED(_obj._type)) {
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_obj._unVal.pRefCounted->_weakref = NULL;
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}
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sq_delete(this,SQWeakRef);
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}
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bool SQDelegable::GetMetaMethod(SQVM *v,SQMetaMethod mm,SQObjectPtr &res) {
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if(_delegate) {
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return _delegate->Get((*_ss(v)->_metamethods)[mm],res);
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}
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return false;
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}
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bool SQDelegable::SetDelegate(SQTable *mt)
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{
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SQTable *temp = mt;
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while (temp) {
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if (temp->_delegate == this) return false; //cycle detected
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temp = temp->_delegate;
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}
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if (mt) __ObjAddRef(mt);
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__ObjRelease(_delegate);
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_delegate = mt;
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return true;
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}
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bool SQGenerator::Yield(SQVM *v)
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{
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if(_state==eSuspended) { v->Raise_Error(_SC("internal vm error, yielding dead generator")); return false;}
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if(_state==eDead) { v->Raise_Error(_SC("internal vm error, yielding a dead generator")); return false; }
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SQInteger size = v->_top-v->_stackbase;
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_ci=*v->ci;
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_stack.resize(size);
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for(SQInteger n =0; n<size; n++) {
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_stack._vals[n] = v->_stack[v->_stackbase+n];
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v->_stack[v->_stackbase+n] = _null_;
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}
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SQInteger nvargs = v->ci->_vargs.size;
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SQInteger vargsbase = v->ci->_vargs.base;
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for(SQInteger j = nvargs - 1; j >= 0; j--) {
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_vargsstack.push_back(v->_vargsstack[vargsbase+j]);
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}
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_ci._generator=_null_;
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for(SQInteger i=0;i<_ci._etraps;i++) {
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_etraps.push_back(v->_etraps.top());
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v->_etraps.pop_back();
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}
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_state=eSuspended;
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return true;
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}
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bool SQGenerator::Resume(SQVM *v,SQInteger target)
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{
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SQInteger size=_stack.size();
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if(_state==eDead){ v->Raise_Error(_SC("resuming dead generator")); return false; }
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if(_state==eRunning){ v->Raise_Error(_SC("resuming active generator")); return false; }
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SQInteger prevtop=v->_top-v->_stackbase;
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PUSH_CALLINFO(v,_ci);
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SQInteger oldstackbase=v->_stackbase;
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v->_stackbase = v->_top;
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v->ci->_target = (SQInt32)target;
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v->ci->_generator = SQObjectPtr(this);
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v->ci->_vargs.size = (unsigned short)_vargsstack.size();
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for(SQInteger i=0;i<_ci._etraps;i++) {
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v->_etraps.push_back(_etraps.top());
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_etraps.pop_back();
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}
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for(SQInteger n =0; n<size; n++) {
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v->_stack[v->_stackbase+n] = _stack._vals[n];
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_stack._vals[0] = _null_;
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}
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while(_vargsstack.size()) {
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v->_vargsstack.push_back(_vargsstack.back());
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_vargsstack.pop_back();
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}
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v->ci->_vargs.base = (unsigned short)(v->_vargsstack.size() - v->ci->_vargs.size);
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v->_top=v->_stackbase+size;
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v->ci->_prevtop = (SQInt32)prevtop;
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v->ci->_prevstkbase = (SQInt32)(v->_stackbase - oldstackbase);
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_state=eRunning;
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return true;
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}
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void SQArray::Extend(const SQArray *a){
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SQInteger xlen;
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if((xlen=a->Size()))
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for(SQInteger i=0;i<xlen;i++)
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Append(a->_values[i]);
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}
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const SQChar* SQFunctionProto::GetLocal(SQVM *vm,SQUnsignedInteger stackbase,SQUnsignedInteger nseq,SQUnsignedInteger nop)
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{
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SQUnsignedInteger nvars=_nlocalvarinfos;
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const SQChar *res=NULL;
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if(nvars>=nseq){
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for(SQUnsignedInteger i=0;i<nvars;i++){
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if(_localvarinfos[i]._start_op<=nop && _localvarinfos[i]._end_op>=nop)
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{
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if(nseq==0){
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vm->Push(vm->_stack[stackbase+_localvarinfos[i]._pos]);
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res=_stringval(_localvarinfos[i]._name);
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break;
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}
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nseq--;
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}
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}
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}
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return res;
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}
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SQInteger SQFunctionProto::GetLine(SQInstruction *curr)
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{
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SQInteger op = (SQInteger)(curr-_instructions);
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SQInteger line=_lineinfos[0]._line;
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for(SQInteger i=1;i<_nlineinfos;i++){
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if(_lineinfos[i]._op>=op)
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return line;
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line=_lineinfos[i]._line;
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}
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return line;
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}
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//#define _ERROR_TRAP() error_trap:
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#define _CHECK_IO(exp) { if(!exp)return false; }
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bool SafeWrite(HSQUIRRELVM v,SQWRITEFUNC write,SQUserPointer up,SQUserPointer dest,SQInteger size)
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{
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if(write(up,dest,size) != size) {
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v->Raise_Error(_SC("io error (write function failure)"));
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return false;
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}
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return true;
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}
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bool SafeRead(HSQUIRRELVM v,SQWRITEFUNC read,SQUserPointer up,SQUserPointer dest,SQInteger size)
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{
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if(size && read(up,dest,size) != size) {
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v->Raise_Error(_SC("io error, read function failure, the origin stream could be corrupted/trucated"));
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return false;
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}
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return true;
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}
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bool WriteTag(HSQUIRRELVM v,SQWRITEFUNC write,SQUserPointer up,SQInteger tag)
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{
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return SafeWrite(v,write,up,&tag,sizeof(tag));
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}
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bool CheckTag(HSQUIRRELVM v,SQWRITEFUNC read,SQUserPointer up,SQInteger tag)
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{
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SQInteger t;
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_CHECK_IO(SafeRead(v,read,up,&t,sizeof(t)));
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if(t != tag){
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v->Raise_Error(_SC("invalid or corrupted closure stream"));
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return false;
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}
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return true;
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}
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bool WriteObject(HSQUIRRELVM v,SQUserPointer up,SQWRITEFUNC write,SQObjectPtr &o)
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{
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_CHECK_IO(SafeWrite(v,write,up,&type(o),sizeof(SQObjectType)));
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switch(type(o)){
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case OT_STRING:
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_CHECK_IO(SafeWrite(v,write,up,&_string(o)->_len,sizeof(SQInteger)));
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_CHECK_IO(SafeWrite(v,write,up,_stringval(o),rsl(_string(o)->_len)));
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break;
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case OT_INTEGER:
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_CHECK_IO(SafeWrite(v,write,up,&_integer(o),sizeof(SQInteger)));break;
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case OT_FLOAT:
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_CHECK_IO(SafeWrite(v,write,up,&_float(o),sizeof(SQFloat)));break;
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case OT_NULL:
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break;
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default:
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v->Raise_Error(_SC("cannot serialize a %s"),GetTypeName(o));
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return false;
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}
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return true;
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}
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bool ReadObject(HSQUIRRELVM v,SQUserPointer up,SQREADFUNC read,SQObjectPtr &o)
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{
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SQObjectType t;
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_CHECK_IO(SafeRead(v,read,up,&t,sizeof(SQObjectType)));
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switch(t){
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case OT_STRING:{
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SQInteger len;
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_CHECK_IO(SafeRead(v,read,up,&len,sizeof(SQInteger)));
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_CHECK_IO(SafeRead(v,read,up,_ss(v)->GetScratchPad(rsl(len)),rsl(len)));
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o=SQString::Create(_ss(v),_ss(v)->GetScratchPad(-1),len);
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}
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break;
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case OT_INTEGER:{
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SQInteger i;
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_CHECK_IO(SafeRead(v,read,up,&i,sizeof(SQInteger))); o = i; break;
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}
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case OT_FLOAT:{
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SQFloat f;
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_CHECK_IO(SafeRead(v,read,up,&f,sizeof(SQFloat))); o = f; break;
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}
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case OT_NULL:
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o=_null_;
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break;
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default:
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v->Raise_Error(_SC("cannot serialize a %s"),IdType2Name(t));
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return false;
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}
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return true;
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}
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bool SQClosure::Save(SQVM *v,SQUserPointer up,SQWRITEFUNC write)
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{
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_CHECK_IO(WriteTag(v,write,up,SQ_CLOSURESTREAM_HEAD));
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_CHECK_IO(WriteTag(v,write,up,sizeof(SQChar)));
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_CHECK_IO(_funcproto(_function)->Save(v,up,write));
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_CHECK_IO(WriteTag(v,write,up,SQ_CLOSURESTREAM_TAIL));
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return true;
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}
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bool SQClosure::Load(SQVM *v,SQUserPointer up,SQREADFUNC read,SQObjectPtr &ret)
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{
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_CHECK_IO(CheckTag(v,read,up,SQ_CLOSURESTREAM_HEAD));
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_CHECK_IO(CheckTag(v,read,up,sizeof(SQChar)));
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//_CHECK_IO(_funcproto(_function)->Load(v,up,read));
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SQObjectPtr func;
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_CHECK_IO(SQFunctionProto::Load(v,up,read,func));
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_CHECK_IO(CheckTag(v,read,up,SQ_CLOSURESTREAM_TAIL));
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ret = SQClosure::Create(_ss(v),_funcproto(func));
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return true;
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}
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bool SQFunctionProto::Save(SQVM *v,SQUserPointer up,SQWRITEFUNC write)
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{
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SQInteger i,nliterals = _nliterals,nparameters = _nparameters;
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SQInteger noutervalues = _noutervalues,nlocalvarinfos = _nlocalvarinfos;
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SQInteger nlineinfos=_nlineinfos,ninstructions = _ninstructions,nfunctions=_nfunctions;
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_CHECK_IO(WriteTag(v,write,up,SQ_CLOSURESTREAM_PART));
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_CHECK_IO(WriteObject(v,up,write,_sourcename));
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_CHECK_IO(WriteObject(v,up,write,_name));
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_CHECK_IO(WriteTag(v,write,up,SQ_CLOSURESTREAM_PART));
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_CHECK_IO(SafeWrite(v,write,up,&nliterals,sizeof(nliterals)));
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_CHECK_IO(SafeWrite(v,write,up,&nparameters,sizeof(nparameters)));
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_CHECK_IO(SafeWrite(v,write,up,&noutervalues,sizeof(noutervalues)));
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_CHECK_IO(SafeWrite(v,write,up,&nlocalvarinfos,sizeof(nlocalvarinfos)));
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_CHECK_IO(SafeWrite(v,write,up,&nlineinfos,sizeof(nlineinfos)));
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_CHECK_IO(SafeWrite(v,write,up,&ninstructions,sizeof(ninstructions)));
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_CHECK_IO(SafeWrite(v,write,up,&nfunctions,sizeof(nfunctions)));
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_CHECK_IO(WriteTag(v,write,up,SQ_CLOSURESTREAM_PART));
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for(i=0;i<nliterals;i++){
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_CHECK_IO(WriteObject(v,up,write,_literals[i]));
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}
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_CHECK_IO(WriteTag(v,write,up,SQ_CLOSURESTREAM_PART));
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for(i=0;i<nparameters;i++){
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_CHECK_IO(WriteObject(v,up,write,_parameters[i]));
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}
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_CHECK_IO(WriteTag(v,write,up,SQ_CLOSURESTREAM_PART));
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for(i=0;i<noutervalues;i++){
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_CHECK_IO(SafeWrite(v,write,up,&_outervalues[i]._type,sizeof(SQUnsignedInteger)));
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_CHECK_IO(WriteObject(v,up,write,_outervalues[i]._src));
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_CHECK_IO(WriteObject(v,up,write,_outervalues[i]._name));
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}
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_CHECK_IO(WriteTag(v,write,up,SQ_CLOSURESTREAM_PART));
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for(i=0;i<nlocalvarinfos;i++){
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SQLocalVarInfo &lvi=_localvarinfos[i];
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_CHECK_IO(WriteObject(v,up,write,lvi._name));
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_CHECK_IO(SafeWrite(v,write,up,&lvi._pos,sizeof(SQUnsignedInteger)));
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_CHECK_IO(SafeWrite(v,write,up,&lvi._start_op,sizeof(SQUnsignedInteger)));
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_CHECK_IO(SafeWrite(v,write,up,&lvi._end_op,sizeof(SQUnsignedInteger)));
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}
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_CHECK_IO(WriteTag(v,write,up,SQ_CLOSURESTREAM_PART));
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_CHECK_IO(SafeWrite(v,write,up,_lineinfos,sizeof(SQLineInfo)*nlineinfos));
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_CHECK_IO(WriteTag(v,write,up,SQ_CLOSURESTREAM_PART));
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_CHECK_IO(SafeWrite(v,write,up,_instructions,sizeof(SQInstruction)*ninstructions));
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_CHECK_IO(WriteTag(v,write,up,SQ_CLOSURESTREAM_PART));
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for(i=0;i<nfunctions;i++){
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_CHECK_IO(_funcproto(_functions[i])->Save(v,up,write));
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}
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_CHECK_IO(SafeWrite(v,write,up,&_stacksize,sizeof(_stacksize)));
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_CHECK_IO(SafeWrite(v,write,up,&_bgenerator,sizeof(_bgenerator)));
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_CHECK_IO(SafeWrite(v,write,up,&_varparams,sizeof(_varparams)));
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return true;
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}
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bool SQFunctionProto::Load(SQVM *v,SQUserPointer up,SQREADFUNC read,SQObjectPtr &ret)
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{
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SQInteger i, nliterals,nparameters;
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SQInteger noutervalues ,nlocalvarinfos ;
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SQInteger nlineinfos,ninstructions ,nfunctions ;
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SQObjectPtr sourcename, name;
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SQObjectPtr o;
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_CHECK_IO(CheckTag(v,read,up,SQ_CLOSURESTREAM_PART));
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_CHECK_IO(ReadObject(v, up, read, sourcename));
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_CHECK_IO(ReadObject(v, up, read, name));
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_CHECK_IO(CheckTag(v,read,up,SQ_CLOSURESTREAM_PART));
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_CHECK_IO(SafeRead(v,read,up, &nliterals, sizeof(nliterals)));
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_CHECK_IO(SafeRead(v,read,up, &nparameters, sizeof(nparameters)));
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_CHECK_IO(SafeRead(v,read,up, &noutervalues, sizeof(noutervalues)));
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_CHECK_IO(SafeRead(v,read,up, &nlocalvarinfos, sizeof(nlocalvarinfos)));
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_CHECK_IO(SafeRead(v,read,up, &nlineinfos, sizeof(nlineinfos)));
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_CHECK_IO(SafeRead(v,read,up, &ninstructions, sizeof(ninstructions)));
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_CHECK_IO(SafeRead(v,read,up, &nfunctions, sizeof(nfunctions)));
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SQFunctionProto *f = SQFunctionProto::Create(ninstructions,nliterals,nparameters,nfunctions,noutervalues,nlineinfos,nlocalvarinfos);
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SQObjectPtr proto = f; //gets a ref in case of failure
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f->_sourcename = sourcename;
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f->_name = name;
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_CHECK_IO(CheckTag(v,read,up,SQ_CLOSURESTREAM_PART));
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// f->_literals.reserve(nliterals);
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for(i = 0;i < nliterals; i++){
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_CHECK_IO(ReadObject(v, up, read, o));
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f->_literals[i] = o;
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}
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_CHECK_IO(CheckTag(v,read,up,SQ_CLOSURESTREAM_PART));
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// f->_parameters.reserve(nparameters);
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for(i = 0; i < nparameters; i++){
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_CHECK_IO(ReadObject(v, up, read, o));
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f->_parameters[i] = o;
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}
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_CHECK_IO(CheckTag(v,read,up,SQ_CLOSURESTREAM_PART));
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// f->_outervalues.reserve(noutervalues);
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for(i = 0; i < noutervalues; i++){
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SQUnsignedInteger type;
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SQObjectPtr name;
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_CHECK_IO(SafeRead(v,read,up, &type, sizeof(SQUnsignedInteger)));
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_CHECK_IO(ReadObject(v, up, read, o));
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_CHECK_IO(ReadObject(v, up, read, name));
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f->_outervalues[i] = SQOuterVar(name,o, (SQOuterType)type);
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}
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_CHECK_IO(CheckTag(v,read,up,SQ_CLOSURESTREAM_PART));
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// f->_localvarinfos.reserve(nlocalvarinfos);
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for(i = 0; i < nlocalvarinfos; i++){
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SQLocalVarInfo lvi;
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_CHECK_IO(ReadObject(v, up, read, lvi._name));
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_CHECK_IO(SafeRead(v,read,up, &lvi._pos, sizeof(SQUnsignedInteger)));
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_CHECK_IO(SafeRead(v,read,up, &lvi._start_op, sizeof(SQUnsignedInteger)));
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_CHECK_IO(SafeRead(v,read,up, &lvi._end_op, sizeof(SQUnsignedInteger)));
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f->_localvarinfos[i] = lvi;
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}
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_CHECK_IO(CheckTag(v,read,up,SQ_CLOSURESTREAM_PART));
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//f->_lineinfos.resize(nlineinfos);
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_CHECK_IO(SafeRead(v,read,up, f->_lineinfos, sizeof(SQLineInfo)*nlineinfos));
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_CHECK_IO(CheckTag(v,read,up,SQ_CLOSURESTREAM_PART));
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_CHECK_IO(SafeRead(v,read,up, f->_instructions, sizeof(SQInstruction)*ninstructions));
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_CHECK_IO(CheckTag(v,read,up,SQ_CLOSURESTREAM_PART));
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// f->_functions.reserve(nfunctions);
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for(i = 0; i < nfunctions; i++){
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_CHECK_IO(_funcproto(o)->Load(v, up, read, o));
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f->_functions[i] = o;
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}
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_CHECK_IO(SafeRead(v,read,up, &f->_stacksize, sizeof(f->_stacksize)));
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_CHECK_IO(SafeRead(v,read,up, &f->_bgenerator, sizeof(f->_bgenerator)));
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|
_CHECK_IO(SafeRead(v,read,up, &f->_varparams, sizeof(f->_varparams)));
|
|
ret = f;
|
|
return true;
|
|
}
|
|
|
|
#ifndef NO_GARBAGE_COLLECTOR
|
|
|
|
#define START_MARK() if(!(_uiRef&MARK_FLAG)){ \
|
|
_uiRef|=MARK_FLAG;
|
|
|
|
#define END_MARK() RemoveFromChain(&_sharedstate->_gc_chain, this); \
|
|
AddToChain(chain, this); }
|
|
|
|
void SQVM::Mark(SQCollectable **chain)
|
|
{
|
|
START_MARK()
|
|
SQSharedState::MarkObject(_lasterror,chain);
|
|
SQSharedState::MarkObject(_errorhandler,chain);
|
|
SQSharedState::MarkObject(_debughook,chain);
|
|
SQSharedState::MarkObject(_roottable, chain);
|
|
SQSharedState::MarkObject(temp_reg, chain);
|
|
for(SQUnsignedInteger i = 0; i < _stack.size(); i++) SQSharedState::MarkObject(_stack[i], chain);
|
|
for(SQUnsignedInteger j = 0; j < _vargsstack.size(); j++) SQSharedState::MarkObject(_vargsstack[j], chain);
|
|
END_MARK()
|
|
}
|
|
|
|
void SQArray::Mark(SQCollectable **chain)
|
|
{
|
|
START_MARK()
|
|
SQInteger len = _values.size();
|
|
for(SQInteger i = 0;i < len; i++) SQSharedState::MarkObject(_values[i], chain);
|
|
END_MARK()
|
|
}
|
|
void SQTable::Mark(SQCollectable **chain)
|
|
{
|
|
START_MARK()
|
|
if(_delegate) _delegate->Mark(chain);
|
|
SQInteger len = _numofnodes;
|
|
for(SQInteger i = 0; i < len; i++){
|
|
SQSharedState::MarkObject(_nodes[i].key, chain);
|
|
SQSharedState::MarkObject(_nodes[i].val, chain);
|
|
}
|
|
END_MARK()
|
|
}
|
|
|
|
void SQClass::Mark(SQCollectable **chain)
|
|
{
|
|
START_MARK()
|
|
_members->Mark(chain);
|
|
if(_base) _base->Mark(chain);
|
|
SQSharedState::MarkObject(_attributes, chain);
|
|
for(SQUnsignedInteger i =0; i< _defaultvalues.size(); i++) {
|
|
SQSharedState::MarkObject(_defaultvalues[i].val, chain);
|
|
SQSharedState::MarkObject(_defaultvalues[i].attrs, chain);
|
|
}
|
|
for(SQUnsignedInteger j =0; j< _methods.size(); j++) {
|
|
SQSharedState::MarkObject(_methods[j].val, chain);
|
|
SQSharedState::MarkObject(_methods[j].attrs, chain);
|
|
}
|
|
for(SQUnsignedInteger k =0; k< _metamethods.size(); k++) {
|
|
SQSharedState::MarkObject(_metamethods[k], chain);
|
|
}
|
|
END_MARK()
|
|
}
|
|
|
|
void SQInstance::Mark(SQCollectable **chain)
|
|
{
|
|
START_MARK()
|
|
_class->Mark(chain);
|
|
for(SQUnsignedInteger i =0; i< _nvalues; i++) {
|
|
SQSharedState::MarkObject(_values[i], chain);
|
|
}
|
|
END_MARK()
|
|
}
|
|
|
|
void SQGenerator::Mark(SQCollectable **chain)
|
|
{
|
|
START_MARK()
|
|
for(SQUnsignedInteger i = 0; i < _stack.size(); i++) SQSharedState::MarkObject(_stack[i], chain);
|
|
for(SQUnsignedInteger j = 0; j < _vargsstack.size(); j++) SQSharedState::MarkObject(_vargsstack[j], chain);
|
|
SQSharedState::MarkObject(_closure, chain);
|
|
END_MARK()
|
|
}
|
|
|
|
void SQClosure::Mark(SQCollectable **chain)
|
|
{
|
|
START_MARK()
|
|
for(SQUnsignedInteger i = 0; i < _outervalues.size(); i++) SQSharedState::MarkObject(_outervalues[i], chain);
|
|
END_MARK()
|
|
}
|
|
|
|
void SQNativeClosure::Mark(SQCollectable **chain)
|
|
{
|
|
START_MARK()
|
|
for(SQUnsignedInteger i = 0; i < _outervalues.size(); i++) SQSharedState::MarkObject(_outervalues[i], chain);
|
|
END_MARK()
|
|
}
|
|
|
|
void SQUserData::Mark(SQCollectable **chain){
|
|
START_MARK()
|
|
if(_delegate) _delegate->Mark(chain);
|
|
END_MARK()
|
|
}
|
|
|
|
void SQCollectable::UnMark() { _uiRef&=~MARK_FLAG; }
|
|
|
|
#endif
|
|
|