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Diffstat (limited to 'kyra/script.cpp')
| -rw-r--r-- | kyra/script.cpp | 565 |
1 files changed, 0 insertions, 565 deletions
diff --git a/kyra/script.cpp b/kyra/script.cpp deleted file mode 100644 index b43766dba7..0000000000 --- a/kyra/script.cpp +++ /dev/null @@ -1,565 +0,0 @@ -/* ScummVM - Scumm Interpreter - * Copyright (C) 2004-2006 The ScummVM project - * - * This program 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 2 - * of the License, or (at your option) any later version. - - * This program 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 this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. - * - * $URL$ - * $Id$ - * - */ - -#include "common/stdafx.h" -#include "common/stream.h" -#include "common/util.h" -#include "common/system.h" -#include "kyra/kyra.h" -#include "kyra/resource.h" -#include "kyra/script.h" - -#define FORM_CHUNK 0x4D524F46 -#define TEXT_CHUNK 0x54584554 -#define DATA_CHUNK 0x41544144 -#define ORDR_CHUNK 0x5244524F - -namespace Kyra { -ScriptHelper::ScriptHelper(KyraEngine *vm) : _vm(vm) { -#define COMMAND(x) { &ScriptHelper::x, #x } - // now we create a list of all Command/Opcode procs and so - static CommandEntry commandProcs[] = { - // 0x00 - COMMAND(c1_jmpTo), - COMMAND(c1_setRetValue), - COMMAND(c1_pushRetOrPos), - COMMAND(c1_push), - // 0x04 - COMMAND(c1_push), - COMMAND(c1_pushVar), - COMMAND(c1_pushBPNeg), - COMMAND(c1_pushBPAdd), - // 0x08 - COMMAND(c1_popRetOrPos), - COMMAND(c1_popVar), - COMMAND(c1_popBPNeg), - COMMAND(c1_popBPAdd), - // 0x0C - COMMAND(c1_addSP), - COMMAND(c1_subSP), - COMMAND(c1_execOpcode), - COMMAND(c1_ifNotJmp), - // 0x10 - COMMAND(c1_negate), - COMMAND(c1_eval), - COMMAND(c1_setRetAndJmp) - }; - _commands = commandProcs; -#undef COMMAND -} - -ScriptHelper::~ScriptHelper() { -} - -bool ScriptHelper::loadScript(const char *filename, ScriptData *scriptData, KyraEngine::OpcodeProc *opcodes, int opcodeSize, byte *specialPtr) { - uint32 size = 0; - uint8 *data = _vm->resource()->fileData(filename, &size); - byte *curData = data; - - uint32 formBlockSize = getFORMBlockSize(curData); - if (formBlockSize == (uint32)-1) { - delete [] data; - error("No FORM chunk found in file: '%s'", filename); - return false; - } - - uint32 chunkSize = getIFFBlockSize(data, curData, size, TEXT_CHUNK); - if (chunkSize != (uint32)-1) { - if (specialPtr) { - scriptData->mustBeFreed = 0; - scriptData->text = specialPtr; - specialPtr += chunkSize; - } else { - scriptData->mustBeFreed = 1; - scriptData->text = new byte[chunkSize]; - } - if (!loadIFFBlock(data, curData, size, TEXT_CHUNK, scriptData->text, chunkSize)) { - delete [] data; - unloadScript(scriptData); - error("Couldn't load TEXT chunk from file: '%s'", filename); - return false; - } - } - - chunkSize = getIFFBlockSize(data, curData, size, ORDR_CHUNK); - if (chunkSize == (uint32)-1) { - delete [] data; - unloadScript(scriptData); - error("No ORDR chunk found in file: '%s'", filename); - return false; - } - if (specialPtr) { - scriptData->mustBeFreed = 0; - scriptData->ordr = specialPtr; - specialPtr += chunkSize; - } else { - scriptData->mustBeFreed = 1; - scriptData->ordr = new byte[chunkSize]; - } - if (!loadIFFBlock(data, curData, size, ORDR_CHUNK, scriptData->ordr, chunkSize)) { - delete [] data; - unloadScript(scriptData); - error("Couldn't load ORDR chunk from file: '%s'", filename); - return false; - } - chunkSize = chunkSize / 2; - while (chunkSize--) { - ((uint16*)scriptData->ordr)[chunkSize] = READ_BE_UINT16(&((uint16*)scriptData->ordr)[chunkSize]); - } - - chunkSize = getIFFBlockSize(data, curData, size, DATA_CHUNK); - if (chunkSize == (uint32)-1) { - delete [] data; - unloadScript(scriptData); - error("No DATA chunk found in file: '%s'", filename); - return false; - } - if (specialPtr) { - scriptData->mustBeFreed = 0; - scriptData->data = specialPtr; - specialPtr += chunkSize; - } else { - scriptData->mustBeFreed = 1; - scriptData->data = new byte[chunkSize]; - } - if (!loadIFFBlock(data, curData, size, DATA_CHUNK, scriptData->data, chunkSize)) { - delete [] data; - unloadScript(scriptData); - error("Couldn't load DATA chunk from file: '%s'", filename); - return false; - } - scriptData->dataSize = chunkSize / 2; - scriptData->opcodes = opcodes; - scriptData->opcodeSize = opcodeSize; - - delete [] data; - return true; -} - -void ScriptHelper::unloadScript(ScriptData *data) { - if (data->mustBeFreed) { - delete [] data->text; - delete [] data->ordr; - delete [] data->data; - } - - data->mustBeFreed = 0; - data->text = data->ordr = data->data = 0; -} - -void ScriptHelper::initScript(ScriptState *scriptStat, ScriptData *data) { - scriptStat->dataPtr = data; - scriptStat->ip = 0; - scriptStat->stack[60] = 0; - scriptStat->bp = 62; - scriptStat->sp = 60; -} - -bool ScriptHelper::startScript(ScriptState *script, int function) { - if (!script->dataPtr) { - return false; - } - uint16 functionOffset = ((uint16*)script->dataPtr->ordr)[function]; - if (functionOffset == (uint16)-1) { - return false; - } - script->ip = &script->dataPtr->data[functionOffset*2]; - return true; -} - -bool ScriptHelper::validScript(ScriptState *script) { - if (!script->ip || !script->dataPtr) - return false; - return true; -} - -bool ScriptHelper::runScript(ScriptState *script) { - _parameter = 0; - _continue = true; - - if (!script->ip) { - return false; - } - - int16 code = READ_BE_UINT16(script->ip); script->ip += 2; - int16 opcode = (code >> 8) & 0x1F; - - if (code & 0x8000) { - opcode = 0; - _parameter = code & 0x7FFF; - } else if (code & 0x4000) { - _parameter = (int8)(code); - } else if (code & 0x2000) { - _parameter = READ_BE_UINT16(script->ip); script->ip += 2; - } else { - _parameter = 0; - } - - if (opcode > 18) { - error("Script unknown command: %d", opcode); - } else { - debug(5, "%s(%d)", _commands[opcode].desc, _parameter); - (this->*(_commands[opcode].proc))(script); - } - - return _continue; -} - -uint32 ScriptHelper::getFORMBlockSize(byte *&data) const { - static const uint32 chunkName = FORM_CHUNK; - if (READ_LE_UINT32(data) != chunkName) { - return (uint32)-1; - } - data += 4; - uint32 retValue = READ_BE_UINT32(data); data += 4; - return retValue; -} - -uint32 ScriptHelper::getIFFBlockSize(byte *start, byte *&data, uint32 maxSize, const uint32 chunkName) const { - uint32 size = (uint32)-1; - bool special = false; - - if (data == (start + maxSize)) { - data = start + 0x0C; - } - while (data < (start + maxSize)) { - uint32 chunk = READ_LE_UINT32(data); data += 4; - uint32 size_temp = READ_BE_UINT32(data); data += 4; - if (chunk != chunkName) { - if (special) { - data += (size_temp + 1) & 0xFFFFFFFE; - } else { - data = start + 0x0C; - special = true; - } - } else { - // kill our data - data = start; - size = size_temp; - break; - } - } - return size; -} - -bool ScriptHelper::loadIFFBlock(byte *start, byte *&data, uint32 maxSize, const uint32 chunkName, byte *loadTo, uint32 ptrSize) const { - bool special = false; - - if (data == (start + maxSize)) { - data = start + 0x0C; - } - while (data < (start + maxSize)) { - uint32 chunk = READ_LE_UINT32(data); data += 4; - uint32 chunkSize = READ_BE_UINT32(data); data += 4; - if (chunk != chunkName) { - if (special) { - data += (chunkSize + 1) & 0xFFFFFFFE; - } else { - data = start + 0x0C; - special = true; - } - } else { - uint32 loadSize = 0; - if (chunkSize < ptrSize) - loadSize = chunkSize; - else - loadSize = ptrSize; - memcpy(loadTo, data, loadSize); - chunkSize = (chunkSize + 1) & 0xFFFFFFFE; - if (chunkSize > loadSize) { - data += (chunkSize - loadSize); - } - return true; - } - } - return false; -} - -#pragma mark - -#pragma mark - Command implementations -#pragma mark - - -void ScriptHelper::c1_jmpTo(ScriptState* script) { - script->ip = script->dataPtr->data + (_parameter << 1); -} - -void ScriptHelper::c1_setRetValue(ScriptState* script) { - script->retValue = _parameter; -} - -void ScriptHelper::c1_pushRetOrPos(ScriptState* script) { - switch (_parameter) { - case 0: - script->stack[--script->sp] = script->retValue; - break; - - case 1: - script->stack[--script->sp] = (script->ip - script->dataPtr->data) / 2 + 1; - script->stack[--script->sp] = script->bp; - script->bp = script->sp + 2; - break; - - default: - _continue = false; - script->ip = 0; - break; - } -} - -void ScriptHelper::c1_push(ScriptState* script) { - script->stack[--script->sp] = _parameter; -} - -void ScriptHelper::c1_pushVar(ScriptState* script) { - script->stack[--script->sp] = script->variables[_parameter]; -} - -void ScriptHelper::c1_pushBPNeg(ScriptState* script) { - script->stack[--script->sp] = script->stack[(-(int32)(_parameter + 2)) + script->bp]; -} - -void ScriptHelper::c1_pushBPAdd(ScriptState* script) { - script->stack[--script->sp] = script->stack[(_parameter - 1) + script->bp]; -} - -void ScriptHelper::c1_popRetOrPos(ScriptState* script) { - switch (_parameter) { - case 0: - script->retValue = script->stack[script->sp++]; - break; - - case 1: - if (script->sp >= 60) { - _continue = false; - script->ip = 0; - } else { - script->bp = script->stack[script->sp++]; - script->ip = script->dataPtr->data + (script->stack[script->sp++] << 1); - } - break; - - default: - _continue = false; - script->ip = 0; - break; - } -} - -void ScriptHelper::c1_popVar(ScriptState* script) { - script->variables[_parameter] = script->stack[script->sp++]; -} - -void ScriptHelper::c1_popBPNeg(ScriptState* script) { - script->stack[(-(int32)(_parameter + 2)) + script->bp] = script->stack[script->sp++]; -} - -void ScriptHelper::c1_popBPAdd(ScriptState* script) { - script->stack[(_parameter - 1) + script->bp] = script->stack[script->sp++]; -} - -void ScriptHelper::c1_addSP(ScriptState* script) { - script->sp += _parameter; -} - -void ScriptHelper::c1_subSP(ScriptState* script) { - script->sp -= _parameter; -} - -void ScriptHelper::c1_execOpcode(ScriptState* script) { - assert((uint8)_parameter < script->dataPtr->opcodeSize); - if (script->dataPtr->opcodes[(uint8)_parameter] == &KyraEngine::cmd_dummy) - debug("calling unimplemented opcode(0x%.02X)", (uint8)_parameter); - int val = (_vm->*script->dataPtr->opcodes[(uint8)_parameter])(script); - assert(script); - script->retValue = val; -} - -void ScriptHelper::c1_ifNotJmp(ScriptState* script) { - if (!script->stack[script->sp++]) { - _parameter &= 0x7FFF; - script->ip = script->dataPtr->data + (_parameter << 1); - } -} - -void ScriptHelper::c1_negate(ScriptState* script) { - int16 value = script->stack[script->sp]; - switch (_parameter) { - case 0: - if (!value) { - script->stack[script->sp] = 1; - } else { - script->stack[script->sp] = 0; - } - break; - - case 1: - script->stack[script->sp] = -value; - break; - - case 2: - script->stack[script->sp] = ~value; - break; - - default: - _continue = false; - break; - } -} - -void ScriptHelper::c1_eval(ScriptState* script) { - int16 ret = 0; - bool error = false; - - int16 val1 = script->stack[script->sp++]; - int16 val2 = script->stack[script->sp++]; - - switch (_parameter) { - case 0: - if (!val2 || !val1) { - ret = 0; - } else { - ret = 1; - } - break; - - case 1: - if (val2 || val1) { - ret = 1; - } else { - ret = 0; - } - break; - - case 2: - if (val1 == val2) { - ret = 1; - } else { - ret = 0; - } - break; - - case 3: - if (val1 != val2) { - ret = 1; - } else { - ret = 0; - } - break; - - case 4: - if (val1 > val2) { - ret = 1; - } else { - ret = 0; - } - break; - - case 5: - if (val1 >= val2) { - ret = 1; - } else { - ret = 0; - } - break; - - case 6: - if (val1 < val2) { - ret = 1; - } else { - ret = 0; - } - break; - - case 7: - if (val1 <= val2) { - ret = 1; - } else { - ret = 0; - } - break; - - case 8: - ret = val1 + val2; - break; - - case 9: - ret = val2 - val1; - break; - - case 10: - ret = val1 * val2; - break; - - case 11: - ret = val2 / val1; - break; - - case 12: - ret = val2 >> val1; - break; - - case 13: - ret = val2 << val1; - break; - - case 14: - ret = val1 & val2; - break; - - case 15: - ret = val1 | val2; - break; - - case 16: - ret = val2 % val1; - break; - - case 17: - ret = val1 ^ val2; - break; - - default: - warning("Unknown evaluate func: %d", _parameter); - error = true; - break; - } - - if (error) { - script->ip = 0; - _continue = false; - } else { - script->stack[--script->sp] = ret; - } -} - -void ScriptHelper::c1_setRetAndJmp(ScriptState* script) { - if (script->sp >= 60) { - _continue = false; - script->ip = 0; - } else { - script->retValue = script->stack[script->sp++]; - uint16 temp = script->stack[script->sp++]; - script->stack[60] = 0; - script->ip = &script->dataPtr->data[temp*2]; - } -} -} // end of namespace Kyra |