1 /* see copyright notice in squirrel.h */
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5 #include "sqopcodes.h"
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6 #include "sqobject.h"
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7 #define MAX_NATIVE_CALLS 100
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8 #define MIN_STACK_OVERHEAD 10
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10 #define SQ_SUSPEND_FLAG -666
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12 void sq_base_register(HSQUIRRELVM v);
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14 struct SQExceptionTrap{
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15 SQExceptionTrap() {}
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16 SQExceptionTrap(SQInteger ss, SQInteger stackbase,SQInstruction *ip, SQInteger ex_target){ _stacksize = ss; _stackbase = stackbase; _ip = ip; _extarget = ex_target;}
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17 SQExceptionTrap(const SQExceptionTrap &et) { (*this) = et; }
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18 SQInteger _stackbase;
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19 SQInteger _stacksize;
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21 SQInteger _extarget;
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26 #define STK(a) _stack._vals[_stackbase+(a)]
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27 #define TARGET _stack._vals[_stackbase+arg0]
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29 typedef sqvector<SQExceptionTrap> ExceptionsTraps;
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31 struct SQVM : public CHAINABLE_OBJ
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34 VarArgs() { size = 0; base = 0; }
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35 unsigned short size;
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36 unsigned short base;
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40 //CallInfo() { _generator._type = OT_NULL;}
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42 SQObjectPtr *_literals;
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43 SQObjectPtr _closure;
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44 SQGenerator *_generator;
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46 SQInt32 _prevstkbase;
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54 typedef sqvector<CallInfo> CallInfoVec;
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56 enum ExecutionType { ET_CALL, ET_RESUME_GENERATOR, ET_RESUME_VM, ET_RESUME_THROW_VM };
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57 SQVM(SQSharedState *ss);
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59 bool Init(SQVM *friendvm, SQInteger stacksize);
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60 bool Execute(SQObjectPtr &func, SQInteger target, SQInteger nargs, SQInteger stackbase, SQObjectPtr &outres, SQBool raiseerror, ExecutionType et = ET_CALL);
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61 //starts a native call return when the NATIVE closure returns
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62 bool CallNative(SQNativeClosure *nclosure, SQInteger nargs, SQInteger stackbase, SQObjectPtr &retval,bool &suspend);
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63 //starts a SQUIRREL call in the same "Execution loop"
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64 bool StartCall(SQClosure *closure, SQInteger target, SQInteger nargs, SQInteger stackbase, bool tailcall);
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65 bool CreateClassInstance(SQClass *theclass, SQObjectPtr &inst, SQObjectPtr &constructor);
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66 //call a generic closure pure SQUIRREL or NATIVE
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67 bool Call(SQObjectPtr &closure, SQInteger nparams, SQInteger stackbase, SQObjectPtr &outres,SQBool raiseerror);
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70 void CallDebugHook(SQInteger type,SQInteger forcedline=0);
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71 void CallErrorHandler(SQObjectPtr &e);
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72 bool Get(const SQObjectPtr &self, const SQObjectPtr &key, SQObjectPtr &dest, bool raw, bool fetchroot);
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73 bool FallBackGet(const SQObjectPtr &self,const SQObjectPtr &key,SQObjectPtr &dest,bool raw);
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74 bool Set(const SQObjectPtr &self, const SQObjectPtr &key, const SQObjectPtr &val, bool fetchroot);
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75 bool NewSlot(const SQObjectPtr &self, const SQObjectPtr &key, const SQObjectPtr &val,bool bstatic);
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76 bool DeleteSlot(const SQObjectPtr &self, const SQObjectPtr &key, SQObjectPtr &res);
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77 bool Clone(const SQObjectPtr &self, SQObjectPtr &target);
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78 bool ObjCmp(const SQObjectPtr &o1, const SQObjectPtr &o2,SQInteger &res);
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79 bool StringCat(const SQObjectPtr &str, const SQObjectPtr &obj, SQObjectPtr &dest);
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80 bool IsEqual(SQObjectPtr &o1,SQObjectPtr &o2,bool &res);
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81 void ToString(const SQObjectPtr &o,SQObjectPtr &res);
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82 SQString *PrintObjVal(const SQObject &o);
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85 void Raise_Error(const SQChar *s, ...);
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86 void Raise_Error(SQObjectPtr &desc);
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87 void Raise_IdxError(SQObject &o);
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88 void Raise_CompareError(const SQObject &o1, const SQObject &o2);
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89 void Raise_ParamTypeError(SQInteger nparam,SQInteger typemask,SQInteger type);
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91 void TypeOf(const SQObjectPtr &obj1, SQObjectPtr &dest);
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92 bool CallMetaMethod(SQDelegable *del, SQMetaMethod mm, SQInteger nparams, SQObjectPtr &outres);
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93 bool ArithMetaMethod(SQInteger op, const SQObjectPtr &o1, const SQObjectPtr &o2, SQObjectPtr &dest);
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94 bool Return(SQInteger _arg0, SQInteger _arg1, SQObjectPtr &retval);
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96 _INLINE bool ARITH_OP(SQUnsignedInteger op,SQObjectPtr &trg,const SQObjectPtr &o1,const SQObjectPtr &o2);
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97 _INLINE bool BW_OP(SQUnsignedInteger op,SQObjectPtr &trg,const SQObjectPtr &o1,const SQObjectPtr &o2);
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98 _INLINE bool NEG_OP(SQObjectPtr &trg,const SQObjectPtr &o1);
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99 _INLINE bool CMP_OP(CmpOP op, const SQObjectPtr &o1,const SQObjectPtr &o2,SQObjectPtr &res);
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100 bool CLOSURE_OP(SQObjectPtr &target, SQFunctionProto *func);
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101 bool GETVARGV_OP(SQObjectPtr &target,SQObjectPtr &idx,CallInfo *ci);
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102 bool CLASS_OP(SQObjectPtr &target,SQInteger base,SQInteger attrs);
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103 bool GETPARENT_OP(SQObjectPtr &o,SQObjectPtr &target);
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104 //return true if the loop is finished
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105 bool FOREACH_OP(SQObjectPtr &o1,SQObjectPtr &o2,SQObjectPtr &o3,SQObjectPtr &o4,SQInteger arg_2,int exitpos,int &jump);
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106 bool DELEGATE_OP(SQObjectPtr &trg,SQObjectPtr &o1,SQObjectPtr &o2);
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107 _INLINE bool LOCAL_INC(SQInteger op,SQObjectPtr &target, SQObjectPtr &a, SQObjectPtr &incr);
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108 _INLINE bool PLOCAL_INC(SQInteger op,SQObjectPtr &target, SQObjectPtr &a, SQObjectPtr &incr);
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109 _INLINE bool DerefInc(SQInteger op,SQObjectPtr &target, SQObjectPtr &self, SQObjectPtr &key, SQObjectPtr &incr, bool postfix);
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110 void PopVarArgs(VarArgs &vargs);
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111 void ClearStack(SQInteger last_top);
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113 void dumpstack(SQInteger stackbase=-1, bool dumpall = false);
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116 #ifndef NO_GARBAGE_COLLECTOR
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117 void Mark(SQCollectable **chain);
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120 void GrowCallStack() {
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121 SQInteger newsize = _alloccallsstacksize*2;
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122 _callstackdata.resize(newsize);
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123 _callsstack = &_callstackdata[0];
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124 _alloccallsstacksize = newsize;
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126 void Release(){ sq_delete(this,SQVM); } //does nothing
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127 ////////////////////////////////////////////////////////////////////////////
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128 //stack functions for the api
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129 void Remove(SQInteger n);
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131 bool IsFalse(SQObjectPtr &o);
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134 void Pop(SQInteger n);
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135 void Push(const SQObjectPtr &o);
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136 SQObjectPtr &Top();
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137 SQObjectPtr &PopGet();
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138 SQObjectPtr &GetUp(SQInteger n);
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139 SQObjectPtr &GetAt(SQInteger n);
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141 SQObjectPtrVec _stack;
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142 SQObjectPtrVec _vargsstack;
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144 SQInteger _stackbase;
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145 SQObjectPtr _roottable;
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146 SQObjectPtr _lasterror;
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147 SQObjectPtr _errorhandler;
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148 SQObjectPtr _debughook;
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150 SQObjectPtr temp_reg;
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153 CallInfo* _callsstack;
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154 SQInteger _callsstacksize;
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155 SQInteger _alloccallsstacksize;
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156 sqvector<CallInfo> _callstackdata;
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158 ExceptionsTraps _etraps;
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161 //VMs sharing the same state
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162 SQSharedState *_sharedstate;
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163 SQInteger _nnativecalls;
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166 SQBool _suspended_root;
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167 SQInteger _suspended_target;
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168 SQInteger _suspended_traps;
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169 VarArgs _suspend_varargs;
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173 AutoDec(SQInteger *n) { _n = n; }
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174 ~AutoDec() { (*_n)--; }
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178 inline SQObjectPtr &stack_get(HSQUIRRELVM v,SQInteger idx){return ((idx>=0)?(v->GetAt(idx+v->_stackbase-1)):(v->GetUp(idx)));}
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180 #define _ss(_vm_) (_vm_)->_sharedstate
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182 #ifndef NO_GARBAGE_COLLECTOR
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183 #define _opt_ss(_vm_) (_vm_)->_sharedstate
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185 #define _opt_ss(_vm_) NULL
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188 #define PUSH_CALLINFO(v,nci){ \
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189 if(v->_callsstacksize == v->_alloccallsstacksize) { \
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190 v->GrowCallStack(); \
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192 v->ci = &v->_callsstack[v->_callsstacksize]; \
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194 v->_callsstacksize++; \
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197 #define POP_CALLINFO(v){ \
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198 v->_callsstacksize--; \
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199 v->ci->_closure.Null(); \
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200 if(v->_callsstacksize) \
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201 v->ci = &v->_callsstack[v->_callsstacksize-1] ; \
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