251 lines
7.3 KiB
C++
251 lines
7.3 KiB
C++
/*
|
|
AngelCode Scripting Library
|
|
Copyright (c) 2003-2018 Andreas Jonsson
|
|
|
|
This software is provided 'as-is', without any express or implied
|
|
warranty. In no event will the authors be held liable for any
|
|
damages arising from the use of this software.
|
|
|
|
Permission is granted to anyone to use this software for any
|
|
purpose, including commercial applications, and to alter it and
|
|
redistribute it freely, subject to the following restrictions:
|
|
|
|
1. The origin of this software must not be misrepresented; you
|
|
must not claim that you wrote the original software. If you use
|
|
this software in a product, an acknowledgment in the product
|
|
documentation would be appreciated but is not required.
|
|
|
|
2. Altered source versions must be plainly marked as such, and
|
|
must not be misrepresented as being the original software.
|
|
|
|
3. This notice may not be removed or altered from any source
|
|
distribution.
|
|
|
|
The original version of this library can be located at:
|
|
http://www.angelcode.com/angelscript/
|
|
|
|
Andreas Jonsson
|
|
andreas@angelcode.com
|
|
*/
|
|
|
|
|
|
//
|
|
// as_context.h
|
|
//
|
|
// This class handles the execution of the byte code
|
|
//
|
|
|
|
|
|
#ifndef AS_CONTEXT_H
|
|
#define AS_CONTEXT_H
|
|
|
|
#include "as_config.h"
|
|
#include "as_atomic.h"
|
|
#include "as_array.h"
|
|
#include "as_string.h"
|
|
#include "as_objecttype.h"
|
|
#include "as_callfunc.h"
|
|
|
|
BEGIN_AS_NAMESPACE
|
|
|
|
class asCScriptFunction;
|
|
class asCScriptEngine;
|
|
|
|
class asCContext : public asIScriptContext
|
|
{
|
|
public:
|
|
// Memory management
|
|
int AddRef() const;
|
|
int Release() const;
|
|
|
|
// Miscellaneous
|
|
asIScriptEngine *GetEngine() const;
|
|
|
|
// Execution
|
|
int Prepare(asIScriptFunction *func);
|
|
int Unprepare();
|
|
int Execute();
|
|
int Abort();
|
|
int Suspend();
|
|
asEContextState GetState() const;
|
|
int PushState();
|
|
int PopState();
|
|
bool IsNested(asUINT *nestCount = 0) const;
|
|
|
|
// Object pointer for calling class methods
|
|
int SetObject(void *obj);
|
|
|
|
// Arguments
|
|
int SetArgByte(asUINT arg, asBYTE value);
|
|
int SetArgWord(asUINT arg, asWORD value);
|
|
int SetArgDWord(asUINT arg, asDWORD value);
|
|
int SetArgQWord(asUINT arg, asQWORD value);
|
|
int SetArgFloat(asUINT arg, float value);
|
|
int SetArgDouble(asUINT arg, double value);
|
|
int SetArgAddress(asUINT arg, void *addr);
|
|
int SetArgObject(asUINT arg, void *obj);
|
|
int SetArgVarType(asUINT arg, void *ptr, int typeId);
|
|
void *GetAddressOfArg(asUINT arg);
|
|
|
|
// Return value
|
|
asBYTE GetReturnByte();
|
|
asWORD GetReturnWord();
|
|
asDWORD GetReturnDWord();
|
|
asQWORD GetReturnQWord();
|
|
float GetReturnFloat();
|
|
double GetReturnDouble();
|
|
void *GetReturnAddress();
|
|
void *GetReturnObject();
|
|
void *GetAddressOfReturnValue();
|
|
|
|
// Exception handling
|
|
int SetException(const char *descr, bool allowCatch = true);
|
|
int GetExceptionLineNumber(int *column, const char **sectionName);
|
|
asIScriptFunction *GetExceptionFunction();
|
|
const char * GetExceptionString();
|
|
bool WillExceptionBeCaught();
|
|
int SetExceptionCallback(asSFuncPtr callback, void *obj, int callConv);
|
|
void ClearExceptionCallback();
|
|
|
|
// Debugging
|
|
int SetLineCallback(asSFuncPtr callback, void *obj, int callConv);
|
|
void ClearLineCallback();
|
|
asUINT GetCallstackSize() const;
|
|
asIScriptFunction *GetFunction(asUINT stackLevel);
|
|
int GetLineNumber(asUINT stackLevel, int *column, const char **sectionName);
|
|
int GetVarCount(asUINT stackLevel);
|
|
const char *GetVarName(asUINT varIndex, asUINT stackLevel);
|
|
const char *GetVarDeclaration(asUINT varIndex, asUINT stackLevel, bool includeNamespace);
|
|
int GetVarTypeId(asUINT varIndex, asUINT stackLevel);
|
|
void *GetAddressOfVar(asUINT varIndex, asUINT stackLevel);
|
|
bool IsVarInScope(asUINT varIndex, asUINT stackLevel);
|
|
int GetThisTypeId(asUINT stackLevel);
|
|
void *GetThisPointer(asUINT stackLevel);
|
|
asIScriptFunction *GetSystemFunction();
|
|
|
|
// User data
|
|
void *SetUserData(void *data, asPWORD type);
|
|
void *GetUserData(asPWORD type) const;
|
|
|
|
public:
|
|
// Internal public functions
|
|
asCContext(asCScriptEngine *engine, bool holdRef);
|
|
virtual ~asCContext();
|
|
|
|
//protected:
|
|
friend class asCScriptEngine;
|
|
|
|
void CallLineCallback();
|
|
void CallExceptionCallback();
|
|
|
|
int CallGeneric(asCScriptFunction *func);
|
|
#ifndef AS_NO_EXCEPTIONS
|
|
void HandleAppException();
|
|
#endif
|
|
void DetachEngine();
|
|
|
|
void ExecuteNext();
|
|
void CleanStack(bool catchException = false);
|
|
bool CleanStackFrame(bool catchException = false);
|
|
void CleanArgsOnStack();
|
|
void CleanReturnObject();
|
|
void DetermineLiveObjects(asCArray<int> &liveObjects, asUINT stackLevel);
|
|
|
|
int PushCallState();
|
|
void PopCallState();
|
|
void CallScriptFunction(asCScriptFunction *func);
|
|
void CallInterfaceMethod(asCScriptFunction *func);
|
|
void PrepareScriptFunction();
|
|
|
|
bool ReserveStackSpace(asUINT size);
|
|
|
|
void SetInternalException(const char *descr, bool allowCatch = true);
|
|
bool FindExceptionTryCatch();
|
|
|
|
// Must be protected for multiple accesses
|
|
mutable asCAtomic m_refCount;
|
|
|
|
bool m_holdEngineRef;
|
|
asCScriptEngine *m_engine;
|
|
|
|
asEContextState m_status;
|
|
bool m_doSuspend;
|
|
bool m_doAbort;
|
|
bool m_externalSuspendRequest;
|
|
|
|
asCScriptFunction *m_currentFunction;
|
|
asCScriptFunction *m_callingSystemFunction;
|
|
|
|
// The call stack holds program pointer, stack pointer, etc for caller functions
|
|
asCArray<size_t> m_callStack;
|
|
|
|
// Dynamically growing local stack
|
|
asCArray<asDWORD *> m_stackBlocks;
|
|
asUINT m_stackBlockSize;
|
|
asUINT m_stackIndex;
|
|
asDWORD *m_originalStackPointer;
|
|
|
|
// Exception handling
|
|
bool m_isStackMemoryNotAllocated;
|
|
bool m_needToCleanupArgs;
|
|
bool m_inExceptionHandler;
|
|
asCString m_exceptionString;
|
|
int m_exceptionFunction;
|
|
int m_exceptionSectionIdx;
|
|
int m_exceptionLine;
|
|
int m_exceptionColumn;
|
|
bool m_exceptionWillBeCaught;
|
|
|
|
// The last prepared function, and some cached values related to it
|
|
asCScriptFunction *m_initialFunction;
|
|
int m_returnValueSize;
|
|
int m_argumentsSize;
|
|
|
|
// callbacks
|
|
bool m_lineCallback;
|
|
asSSystemFunctionInterface m_lineCallbackFunc;
|
|
void * m_lineCallbackObj;
|
|
|
|
bool m_exceptionCallback;
|
|
asSSystemFunctionInterface m_exceptionCallbackFunc;
|
|
void * m_exceptionCallbackObj;
|
|
|
|
asCArray<asPWORD> m_userData;
|
|
|
|
// Registers available to JIT compiler functions
|
|
asSVMRegisters m_regs;
|
|
};
|
|
|
|
// TODO: Move these to as_utils.h
|
|
int as_powi(int base, int exponent, bool& isOverflow);
|
|
asDWORD as_powu(asDWORD base, asDWORD exponent, bool& isOverflow);
|
|
asINT64 as_powi64(asINT64 base, asINT64 exponent, bool& isOverflow);
|
|
asQWORD as_powu64(asQWORD base, asQWORD exponent, bool& isOverflow);
|
|
|
|
// Optional template version of powi if overflow detection is not used.
|
|
#if 0
|
|
template <class T>
|
|
T as_powi(T base, T exponent)
|
|
{
|
|
// Test for sign bit (huge number is OK)
|
|
if( exponent & (T(1)<<(sizeof(T)*8-1)) )
|
|
return 0;
|
|
else
|
|
{
|
|
int result = 1;
|
|
while( exponent )
|
|
{
|
|
if( exponent & 1 )
|
|
result *= base;
|
|
exponent >>= 1;
|
|
base *= base;
|
|
}
|
|
return result;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
END_AS_NAMESPACE
|
|
|
|
#endif
|