mirror of
https://github.com/libretro/scummvm.git
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149 lines
3.4 KiB
C++
149 lines
3.4 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* $URL$
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* $Id$
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*
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*/
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#ifndef GOB_PARSE_H
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#define GOB_PARSE_H
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namespace Gob {
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enum {
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OP_NEG = 1,
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OP_ADD = 2,
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OP_SUB = 3,
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OP_BITOR = 4,
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OP_MUL = 5,
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OP_DIV = 6,
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OP_MOD = 7,
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OP_BITAND = 8,
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OP_BEGIN_EXPR = 9,
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OP_END_EXPR = 10,
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OP_NOT = 11,
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OP_END_MARKER = 12, // Marks end of an array or string
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OP_ARRAY_UINT8 = 16,
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OP_LOAD_VAR_INT16 = 17,
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OP_LOAD_VAR_INT8 = 18,
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OP_LOAD_IMM_INT32 = 19,
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OP_LOAD_IMM_INT16 = 20,
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OP_LOAD_IMM_INT8 = 21,
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OP_LOAD_IMM_STR = 22,
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OP_LOAD_VAR_UINT32 = 23, // ???
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OP_LOAD_VAR_UINT32_AS_UINT16 = 24, // ???
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OP_LOAD_VAR_STR = 25,
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OP_ARRAY_UINT32 = 26,
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OP_ARRAY_UINT16 = 27,
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OP_ARRAY_STR = 28,
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OP_FUNC = 29,
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OP_OR = 30, // Logical OR
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OP_AND = 31, // Logical AND
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OP_LESS = 32,
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OP_LEQ = 33,
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OP_GREATER = 34,
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OP_GEQ = 35,
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OP_EQ = 36,
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OP_NEQ = 37
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};
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enum {
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FUNC_SQRT1 = 0,
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FUNC_SQRT2 = 1,
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FUNC_SQRT3 = 6,
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FUNC_SQR = 5,
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FUNC_ABS = 7,
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FUNC_RAND = 10
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};
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enum {
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// FIXME: The following two 'truth values' are stored inside the list
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// of "operators". So they somehow coincide with OP_LOAD_VAR_UINT32
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// and OP_LOAD_VAR_UINT32_AS_UINT16. I haven't yet quite understood
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// how, resp. what that means. You have been warned.
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GOB_TRUE = 24,
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GOB_FALSE = 23
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};
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class Parse {
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public:
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void skipExpr(char stopToken);
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void printExpr(char stopToken);
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void printVarIndex(void);
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virtual int16 parseVarIndex(uint16 *arg_0 = 0, uint16 *arg_4 = 0) = 0;
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virtual int16 parseValExpr(byte stopToken = 99) = 0;
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virtual int16 parseExpr(byte stopToken, byte *resultPtr) = 0;
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Parse(GobEngine *vm);
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virtual ~Parse() {}
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protected:
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enum PointerType {
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kExecPtr = 0,
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kInterVar = 1,
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kResStr = 2
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};
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GobEngine *_vm;
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int32 encodePtr(byte *ptr, int type);
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byte *decodePtr(int32 n);
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void printExpr_internal(char stopToken);
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int cmpHelper(byte *operPtr, int32 *valPtr);
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};
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class Parse_v1 : public Parse {
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public:
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Parse_v1(GobEngine *vm);
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virtual ~Parse_v1() {}
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virtual int16 parseVarIndex(uint16 *arg_0 = 0, uint16 *arg_4 = 0);
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virtual int16 parseValExpr(byte stopToken = 99);
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virtual int16 parseExpr(byte stopToken, byte *resultPtr);
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};
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class Parse_v2 : public Parse_v1 {
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public:
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Parse_v2(GobEngine *vm);
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virtual ~Parse_v2() {}
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virtual int16 getOffset(int16 arg_0, byte arg_2, uint32 arg_3, uint16 arg_7, uint16 arg_9);
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virtual int16 parseVarIndex(uint16 *arg_0 = 0, uint16 *arg_4 = 0);
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virtual int16 parseValExpr(byte stopToken = 99);
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virtual int16 parseExpr(byte stopToken, byte *resultPtr);
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};
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} // End of namespace Gob
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#endif // GOB_PARSE_H
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