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/**
STBytecodes.h
Copyright (c) 2002 Free Software Foundation
This file is part of the StepTalk project.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#import <Foundation/NSObject.h>
/* Bytecode table */
/*
#define STReceiverConstant 0x00
#define STTrueConstant 0x01
#define STFalseConstant 0x02
#define STNilConstant 0x03
*/
#define STPushReceiverBytecode 0x00 /* push self */
#define STPushNilBytecode 0x01
#define STPushTrueBytecode 0x02
#define STPushFalseBytecode 0x03
/* 0x00 - 0x07 receiver,true,false,nil,
-1,0,1,2 */
#define STPushRecVarBytecode 0x08 /* recvar index */
#define STPushExternBytecode 0x09 /* extern index */
#define STPushTemporaryBytecode 0x0a /* temp index */
#define STPushLiteralBytecode 0x0b /* lit index */
#define STPopAndStoreRecVarBytecode 0x0c /* recvar index */
#define STPopAndStoreExternBytecode 0x0d /* extern index */
#define STPopAndStoreTempBytecode 0x0e /* temp index */
/* 0x0f reserved */
#define STSendSelectorBytecode 0x10 /* lit index, arg count */
#define STSuperSendSelectorBytecode 0x11 /* lit index, arg count */
#define STBlockCopyBytecode 0x12
#define STLongJumpBytecode 0x13 /* byte 1, byte 2 */
#define STDupBytecode 0x14
#define STPopStackBytecode 0x15
#define STReturnBytecode 0x16
#define STReturnBlockBytecode 0x17
/* 0x18-0x27 reserved single bytecodes */
/* 0x27-0xfe reserved */
#define STBreakpointBytecode 0xff
/*
#define STLongJumpOffset(arg1, arg2) \
( (((arg1) & 0xff) << 8) | ((arg2) & 0xff) )
#define STLongJumpFirstByte(offset)\
( ((offset) >> 8) & 0xff )
#define STLongJumpSecondByte(offset)\
( (offset) & 0xff )
*/
#define STLongJumpBytecodeSize 3
@class NSArray;
@class NSString;
typedef struct
{
unsigned short code;
unsigned short arg1;
unsigned short arg2;
NSUInteger pointer;
} STBytecode;
extern NSArray *STBytecodeNames;
extern NSString *STBytecodeName(unsigned short code);
extern NSString *STDissasembleBytecode(STBytecode bytecode);
@interface STBytecodes:NSObject
{
NSData *bytes;
}
- (id) initWithData: (NSData *)data;
- (STBytecode)fetchNextBytecodeAtPointer:(NSUInteger *)pointer;
- (NSData *) data;
- (NSUInteger) length;
@end
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