/*
===========================================================================

Wolfenstein: Enemy Territory GPL Source Code
Copyright (C) 1999-2010 id Software LLC, a ZeniMax Media company. 

This file is part of the Wolfenstein: Enemy Territory GPL Source Code (Wolf ET Source Code).  

Wolf ET Source Code is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

Wolf ET Source Code is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with Wolf ET Source Code.  If not, see <http://www.gnu.org/licenses/>.

In addition, the Wolf: ET Source Code is also subject to certain additional terms. You should have received a copy of these additional terms immediately following the terms and conditions of the GNU General Public License which accompanied the Wolf ET Source Code.  If not, please request a copy in writing from id Software at the address below.

If you have questions concerning this license or the applicable additional terms, you may contact in writing id Software LLC, c/o ZeniMax Media Inc., Suite 120, Rockville, Maryland 20850 USA.

===========================================================================
*/

#include "../game/q_shared.h"
#include "qcommon.h"

typedef enum {
	OP_UNDEF,

	OP_IGNORE,

	OP_BREAK,

	OP_ENTER,
	OP_LEAVE,
	OP_CALL,
	OP_PUSH,
	OP_POP,

	OP_CONST,
	OP_LOCAL,

	OP_JUMP,

	//-------------------

	OP_EQ,
	OP_NE,

	OP_LTI,
	OP_LEI,
	OP_GTI,
	OP_GEI,

	OP_LTU,
	OP_LEU,
	OP_GTU,
	OP_GEU,

	OP_EQF,
	OP_NEF,

	OP_LTF,
	OP_LEF,
	OP_GTF,
	OP_GEF,

	//-------------------

	OP_LOAD1,
	OP_LOAD2,
	OP_LOAD4,
	OP_STORE1,
	OP_STORE2,
	OP_STORE4,              // *(stack[top-1]) = stack[top]
	OP_ARG,

	OP_BLOCK_COPY,

	//-------------------

	OP_SEX8,
	OP_SEX16,

	OP_NEGI,
	OP_ADD,
	OP_SUB,
	OP_DIVI,
	OP_DIVU,
	OP_MODI,
	OP_MODU,
	OP_MULI,
	OP_MULU,

	OP_BAND,
	OP_BOR,
	OP_BXOR,
	OP_BCOM,

	OP_LSH,
	OP_RSHI,
	OP_RSHU,

	OP_NEGF,
	OP_ADDF,
	OP_SUBF,
	OP_DIVF,
	OP_MULF,

	OP_CVIF,
	OP_CVFI
} opcode_t;



typedef int vmptr_t;

typedef struct vmSymbol_s {
	struct vmSymbol_s   *next;
	int symValue;
	int profileCount;
	char symName[1];        // variable sized
} vmSymbol_t;

#define VM_OFFSET_PROGRAM_STACK     0
#define VM_OFFSET_SYSTEM_CALL       4

struct vm_s {
	// DO NOT MOVE OR CHANGE THESE WITHOUT CHANGING THE VM_OFFSET_* DEFINES
	// USED BY THE ASM CODE
	int programStack;               // the vm may be recursively entered
	int ( *systemCall )( int *parms );

	//------------------------------------

	char name[MAX_QPATH];

// fqpath member added 2/15/02 by T.Ray
	char fqpath[MAX_QPATH + 1] ;

	// for dynamic linked modules
	void        *dllHandle;
	int ( QDECL *entryPoint )( int callNum, ... );

	// for interpreted modules
	qboolean currentlyInterpreting;

	qboolean compiled;
	byte        *codeBase;
	int codeLength;

	int         *instructionPointers;
	int instructionPointersLength;

	byte        *dataBase;
	int dataMask;

	int stackBottom;                // if programStack < stackBottom, error

	int numSymbols;
	struct vmSymbol_s   *symbols;

	int callLevel;                  // for debug indenting
	int breakFunction;              // increment breakCount on function entry to this
	int breakCount;
};


extern vm_t    *currentVM;
extern int vm_debugLevel;

void VM_Compile( vm_t *vm, vmHeader_t *header );
int VM_CallCompiled( vm_t *vm, int *args );

void VM_PrepareInterpreter( vm_t *vm, vmHeader_t *header );
int VM_CallInterpreted( vm_t *vm, int *args );

vmSymbol_t *VM_ValueToFunctionSymbol( vm_t *vm, int value );
int VM_SymbolToValue( vm_t *vm, const char *symbol );
const char *VM_ValueToSymbol( vm_t *vm, int value );
void VM_LogSyscalls( int *args );

