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|
/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* 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 "mohawk/livingbooks.h"
#include "mohawk/resource.h"
namespace Mohawk {
bool LBValue::operator==(const LBValue &x) const {
if (type != x.type) {
if (isNumeric() && x.isNumeric())
return toDouble() == x.toDouble();
else
return false;
}
switch (type) {
case kLBValueString:
return string == x.string;
case kLBValueInteger:
return integer == x.integer;
case kLBValueReal:
return real == x.real;
case kLBValuePoint:
return point == x.point;
case kLBValueRect:
return rect == x.rect;
case kLBValueItemPtr:
return item == x.item;
default:
error("Unknown type when testing for equality");
}
}
bool LBValue::operator!=(const LBValue &x) const {
return !(*this == x);
}
bool LBValue::isNumeric() const {
if (type == kLBValueInteger || type == kLBValueReal)
return true;
// TODO: string checks
return false;
}
bool LBValue::isZero() const {
return toInt() == 0; // FIXME
}
int LBValue::toInt() const {
return integer; // FIXME
}
double LBValue::toDouble() const {
return real; // FIXME
}
LBCode::LBCode(MohawkEngine_LivingBooks *vm) : _vm(vm) {
Common::SeekableSubReadStreamEndian *bcodStream = _vm->wrapStreamEndian(ID_BCOD, 1000);
uint32 totalSize = bcodStream->readUint32();
if (totalSize != (uint32)bcodStream->size())
error("BCOD had size %d, but claimed to be of size %d", bcodStream->size(), totalSize);
_size = bcodStream->readUint32();
if (_size + 8 > totalSize)
error("BCOD code was of size %d, beyond size %d", _size, totalSize);
_data = new byte[_size];
bcodStream->read(_data, _size);
uint16 pos = 0;
while (bcodStream->pos() < bcodStream->size()) {
if (bcodStream->pos() + 1 == bcodStream->size()) {
warning("ran out of bytes while reading strings");
break;
}
uint16 unknown = bcodStream->readUint16();
if (unknown != 0) {
warning("unknown was %04x, not zero, while reading strings", unknown);
if (bcodStream->pos() != bcodStream->size())
error(".. and there was more data afterwards");
break;
}
Common::String string = _vm->readString(bcodStream);
_strings[pos] = string;
debug(2, "read '%s' from BCOD at 0x%04x", string.c_str(), pos);
pos += 2 + string.size() + 1;
}
}
LBCode::~LBCode() {
delete[] _data;
}
LBValue LBCode::runCode(LBItem *src, uint32 offset) {
// TODO: re-entrancy issues?
_currSource = src;
_currOffset = offset;
return runCode(kTokenEndOfFile);
}
void LBCode::nextToken() {
if (_currOffset + 1 >= _size) {
// TODO
warning("went off the end of code");
_currToken = kTokenEndOfFile;
_currValue = LBValue();
return;
}
_currToken = _data[_currOffset++];
// We slurp any value associated with the parameter here too, to simplify things.
switch (_currToken) {
case kTokenIdentifier:
{
uint16 offset = READ_BE_UINT16(_data + _currOffset);
// TODO: check string exists
_currValue = _strings[offset];
_currOffset += 2;
}
break;
case kTokenLiteral:
{
byte literalType = _data[_currOffset++];
switch (literalType) {
case kLBCodeLiteralInteger:
_currValue = READ_BE_UINT16(_data + _currOffset);
_currOffset += 2;
break;
default:
error("unknown kTokenLiteral type %02x", literalType);
}
}
break;
case kTokenConstMode:
case kTokenConstEventId:
case 0x5e: // TODO: ??
case kTokenKeycode:
_currValue = READ_BE_UINT16(_data + _currOffset);
_currOffset += 2;
break;
case kTokenGeneralCommand:
case kTokenItemCommand:
case kTokenNotifyCommand:
case kTokenPropListCommand:
case kTokenRectCommand:
_currValue = _data[_currOffset++];
//_currValue = READ_BE_UINT16(_data + _currOffset);
//_currOffset += 2;
break;
case kTokenString:
{
uint16 offset = READ_BE_UINT16(_data + _currOffset);
// TODO: check string exists
_currValue = _strings[offset];
_currOffset += 2;
}
break;
default:
_currValue = LBValue();
break;
}
}
LBValue LBCode::runCode(byte terminator) {
LBValue result;
while (true) {
nextToken();
if (_currToken == kTokenEndOfFile)
break;
parseStatement();
if (_stack.size())
result = _stack.pop();
if (_currToken == terminator || _currToken == kTokenEndOfFile)
break;
if (_currToken != kTokenEndOfStatement && _currToken != kTokenEndOfFile)
error("missing EOS");
debugN("\n");
}
return result;
}
void LBCode::parseStatement() {
// FIXME: logical operators
parseComparisons();
}
void LBCode::parseComparisons() {
parseConcat();
if (_currToken != kTokenEquals && _currToken != kTokenLessThan && _currToken != kTokenGreaterThan &&
_currToken != kTokenLessThanEq && _currToken != kTokenGreaterThanEq && _currToken != kTokenNotEq)
return;
byte comparison = _currToken;
switch (comparison) {
case kTokenEquals:
debugN(" == ");
break;
case kTokenLessThan:
debugN(" < ");
break;
case kTokenGreaterThan:
debugN(" > ");
break;
case kTokenLessThanEq:
debugN(" <= ");
break;
case kTokenGreaterThanEq:
debugN(" >= ");
break;
case kTokenNotEq:
debugN(" != ");
break;
}
nextToken();
parseConcat();
if (_stack.size() < 2)
error("comparison didn't get enough values");
LBValue val2 = _stack.pop();
LBValue val1 = _stack.pop();
bool result;
// FIXME: should work for non-integers!!
switch (comparison) {
case kTokenEquals:
result = (val1 == val2);
break;
case kTokenLessThan:
result = (val1.integer < val2.integer);
break;
case kTokenGreaterThan:
result = (val1.integer > val2.integer);
break;
case kTokenLessThanEq:
result = (val1.integer <= val2.integer);
break;
case kTokenGreaterThanEq:
result = (val1.integer >= val2.integer);
break;
case kTokenNotEq:
result = (val1 != val2);
break;
}
debugN(" [--> %s]", result ? "true" : "false");
_stack.push(result ? 1 : 0);
}
void LBCode::parseConcat() {
parseArithmetic1();
// FIXME: string concat
}
void LBCode::parseArithmetic1() {
parseArithmetic2();
// FIXME: -/+ math operators
}
void LBCode::parseArithmetic2() {
// FIXME: other math operators
parseMain();
}
void LBCode::parseMain() {
byte prefix = 0;
if (_currToken == kTokenMinus || _currToken == kTokenPlus) {
debugN("%s", _currToken == kTokenMinus ? "-" : "+");
prefix = _currToken;
nextToken();
}
switch (_currToken) {
case kTokenIdentifier:
assert(_currValue.type == kLBValueString);
{
Common::String varname = _currValue.string;
debugN("%s", varname.c_str());
nextToken();
if (varname == "self") {
_stack.push(LBValue(_currSource));
if (_currToken == kTokenAssign)
error("attempted assignment to self");
} else if (_currToken == kTokenAssign) {
debugN(" = ");
nextToken();
parseStatement();
if (!_stack.size())
error("assignment failed");
LBValue *val = &_vm->_variables[varname];
*val = _stack.pop();
_stack.push(*val);
} else {
_stack.push(_vm->_variables[varname]);
}
// FIXME: pre/postincrement
}
break;
case kTokenLiteral:
case kTokenConstMode:
case kTokenConstEventId:
case 0x5e: // TODO: ??
case kTokenKeycode:
assert(_currValue.type == kLBValueInteger);
debugN("%d", _currValue.integer);
_stack.push(_currValue);
nextToken();
break;
case kTokenString:
assert(_currValue.type == kLBValueString);
debugN("\"%s\"", _currValue.string.c_str());
_stack.push(_currValue);
nextToken();
break;
case kTokenOpenBracket:
debugN("(");
nextToken();
parseStatement();
if (_currToken != kTokenCloseBracket)
error("no kTokenCloseBracket (%02x), multiple entries?", _currToken);
debugN(")");
nextToken();
break;
case kTokenNot:
debugN("!");
nextToken();
// not parseStatement, ! takes predecence over logical ops
parseComparisons();
if (!_stack.size())
error("not op failed");
_stack.push(_stack.pop().isZero() ? 1 : 0);
break;
case kTokenGeneralCommand:
runGeneralCommand();
break;
case kTokenItemCommand:
runItemCommand();
break;
case kTokenNotifyCommand:
runNotifyCommand();
break;
default:
error("unknown token %02x in code", _currToken);
}
if (prefix) {
if (!_stack.size())
error("+/- prefix failed");
LBValue val = _stack.pop();
assert(val.isNumeric());
// FIXME
if (prefix == kTokenMinus)
val.integer--;
else
val.integer++;
_stack.push(val);
}
}
Common::Array<LBValue> LBCode::readParams() {
Common::Array<LBValue> params;
if (_currOffset + 1 >= _size)
error("went off the end of code");
byte numParams = _data[_currOffset++];
if (!numParams) {
debugN("()\n");
nextToken();
return params;
}
nextToken();
if (_currToken != kTokenOpenBracket)
error("missing ( before code parameter list (got %02x)", _currToken);
nextToken();
debugN("(");
for (uint i = 0; i < numParams; i++) {
if (i != 0) {
if (_currToken != ',')
error("missing , between code parameters (got %02x)", _currToken);
debugN(", ");
nextToken();
}
parseStatement();
if (!_stack.size())
error("stack empty");
LBValue nextValue = _stack.pop();
params.push_back(nextValue);
}
if (_currToken != kTokenCloseBracket)
error("missing ) after code parameter list (got %02x)", _currToken);
nextToken();
debugN(")");
return params;
}
struct CodeCommandInfo {
const char *name;
typedef void (LBCode::*CommandFunc)(const Common::Array<LBValue> ¶ms);
CommandFunc func;
};
#define NUM_GENERAL_COMMANDS 129
CodeCommandInfo generalCommandInfo[NUM_GENERAL_COMMANDS] = {
{ "eval", 0 },
{ "random", 0 },
{ "stringLen", 0 },
{ "substring", 0 },
{ "max", 0 },
{ "min", 0 },
{ "abs", 0 },
{ "getRect", 0 }, // also "makeRect"
{ "makePt", 0 }, // also "makePair"
{ "topleft", 0 },
{ "bottomright", 0 },
{ "mousePos", 0 },
{ "top", 0 },
{ "left", 0 },
{ "bottom", 0 },
// 0x10
{ "right", 0 },
{ "xpos", 0 },
{ "ypos", 0 },
{ "playFrom", 0 },
{ "move", 0 },
{ 0, 0 },
{ 0, 0 },
{ "setDragParams", 0 },
{ "resetDragParams", 0 },
{ "enableRollover", &LBCode::cmdUnimplemented /* FIXME */ },
{ "setCursor", 0 },
{ "width", 0 },
{ "height", 0 },
{ "getFrameBounds", 0 }, // also "getFrameRect"
{ "traceRect", 0 },
{ "sqrt", 0 },
// 0x20
{ "deleteVar", 0 },
{ "saveVars", 0 },
{ "scriptLink", 0 },
{ "setViewOrigin", &LBCode::cmdUnimplemented },
{ "rectSect", 0 },
{ "getViewOrigin", 0 },
{ "getViewRect", 0 },
{ "getPage", 0 },
{ "getWorldRect", 0 },
{ "isWorldWrap", 0 },
{ "newList", 0 },
{ "deleteList", 0 },
{ "add", 0 },
{ 0, 0 },
{ "addAt", 0 },
{ "getAt", 0 },
// 0x30
{ 0, 0 },
{ "getIndex", 0 },
{ "setAt", 0 },
{ "listLen", 0 },
{ "deleteAt", 0 },
{ "clearList", 0 },
{ "setWorld", 0 },
{ "setProperty", 0 },
{ "getProperty", 0 },
{ "copyList", 0 },
{ "invoke", 0 },
{ "exec", 0 },
{ "return", 0 },
{ "sendSync", 0 },
{ "moveViewOrigin", 0 },
{ "addToGroup", 0 },
// 0x40
{ "removeFromGroup", 0 },
{ "clearGroup", 0 },
{ "setPlayParams", &LBCode::cmdSetPlayParams },
{ "autoEvent", 0 },
{ 0, 0 },
{ 0, 0 },
{ "getID", 0 },
{ "setCursorPosition", 0 },
{ "getTime", 0 },
{ "logWriteLn", 0 },
{ "logWrite", 0 },
{ "getLanguage", 0 },
{ "setLanguage", 0 },
{ "getSequence", 0 },
{ "setSequence", 0 },
{ "getFileSpec", 0 },
// 0x50
{ "setKeyEvent", &LBCode::cmdSetKeyEvent },
{ "setHitTest", &LBCode::cmdSetHitTest },
{ "key", &LBCode::cmdKey },
{ "deleteKeyEvent", 0 },
{ "setDisplay", &LBCode::cmdUnimplemented },
{ "getDisplay", 0 },
{ 0, 0 },
{ "lbxCreate", 0 },
{ "lbxFunc", 0 },
{ "waitCursor", 0 },
{ "debugBreak", 0 },
{ "menuItemEnable", 0 },
{ "showChannel", 0 },
{ "hideChannel", 0 },
{ "setPageFade", 0 },
{ "normalize", 0 },
// 0x60 (v5+)
{ "addEvent", 0 },
{ "setCueEvent", 0 },
{ 0, 0 },
{ 0, 0 },
{ "getName", 0 },
{ "getProperties", 0 },
{ "createItem", 0 },
{ "setProperties", 0 },
{ "alert", 0 },
{ "getUniqueID", 0 },
{ "isNumeric", 0 },
{ "setKeyFocus", 0 },
{ "getKeyFocus", 0 },
{ "isItem", 0 },
{ "itemHit", 0 },
{ "getItem ", 0 },
// 0x70
{ 0, 0 },
{ "setCascade", 0 },
{ "getCascade", 0 },
{ "getRes", 0 },
{ "setRes", 0 },
{ "getFilename", 0 },
{ "resEnumNames", 0 },
{ "isList", 0 },
{ "resetRect", 0 },
{ "setVolume", 0 },
{ "getVolume", 0 },
{ "pause", 0 },
{ "getTextWidth", 0 },
{ "setItemVolume", 0 },
{ "setSoundLoop", 0 },
// 0x80
{ "setClipboard", 0 },
{ "getResDuration", 0 }
};
void LBCode::runGeneralCommand() {
byte commandType = _currValue.integer;
if (commandType == 0 || commandType > NUM_GENERAL_COMMANDS)
error("bad command type 0x%02x in runGeneralCommand", commandType);
CodeCommandInfo &info = generalCommandInfo[commandType - 1];
debugN("%s", info.name);
Common::Array<LBValue> params = readParams();
if (!info.func)
error("general command '%s' (0x%02x) unimplemented", info.name, commandType);
(this->*(info.func))(params);
}
void LBCode::cmdUnimplemented(const Common::Array<LBValue> ¶ms) {
warning("unimplemented command called");
}
void LBCode::cmdSetPlayParams(const Common::Array<LBValue> ¶ms) {
if (params.size() > 8)
error("too many parameters (%d) to setPlayParams", params.size());
if (!params.size())
error("no target for setPlayParams");
if (params[0].type != kLBValueItemPtr)
error("first param to setPlayParams wasn't item");
LBItem *target = params[0].item;
// TODO: type-checking
switch (params.size()) {
case 8:
target->_soundMode = params[7].integer;
case 7:
target->_controlMode = params[6].integer;
case 6:
// TODO: _relocPoint?
case 5:
// TODO: _periodMin/Max
case 4:
target->_timingMode = params[3].integer;
case 3:
// TODO: _delayMin/Max
case 2:
target->_loopMode = params[1].integer;
}
}
void LBCode::cmdSetKeyEvent(const Common::Array<LBValue> ¶ms) {
if (params.size() != 2)
error("incorrect number of parameters (%d) to setKeyEvent", params.size());
// FIXME: params[0] is key, params[1] is opcode id
warning("ignoring setKeyEvent");
}
void LBCode::cmdSetHitTest(const Common::Array<LBValue> ¶ms) {
if (params.size() > 2)
error("incorrect number of parameters (%d) to setHitTest", params.size());
warning("ignoring setHitTest");
}
void LBCode::cmdKey(const Common::Array<LBValue> ¶ms) {
_stack.push(0); // FIXME
warning("ignoring Key");
}
#define NUM_ITEM_COMMANDS 34
CodeCommandInfo itemCommandInfo[NUM_ITEM_COMMANDS] = {
{ "clone", 0 },
{ "destroy", 0 },
{ "dragBeginFrom", 0 },
{ "dragEnd", 0 },
{ "enableLocal", 0 },
{ "enable", 0 },
{ "showLocal", 0 },
{ "show", 0 },
{ "getFrame", 0 },
{ "getParent", 0 },
{ "getPosition" , 0 },
{ "getText", 0 },
{ "getZNext", 0 },
{ "getZPrev", 0 },
{ "hitTest", 0 },
// 0x10
{ "isAmbient", 0 },
{ "isEnabled", 0 },
{ "isMuted", 0 },
{ "isPlaying", &LBCode::itemIsPlaying },
{ "isVisible", 0 },
{ "isLoaded", 0 },
{ "isDragging", 0 },
{ "load", 0 },
{ "moveTo", 0 },
{ "mute", 0 },
{ "play", 0 },
{ "seek", 0 },
{ "seekToFrame", 0 },
{ "setParent", &LBCode::itemSetParent },
{ "setZOrder", 0 },
{ "setText", 0 },
// 0x20
{ "stop", 0 },
{ "unload", 0 },
{ "unloadSync", 0}
};
void LBCode::runItemCommand() {
byte commandType = _currValue.integer;
if (commandType == 0 || commandType > NUM_ITEM_COMMANDS)
error("bad command type 0x%02x in runItemCommand", commandType);
CodeCommandInfo &info = itemCommandInfo[commandType - 1];
debugN("%s", info.name);
Common::Array<LBValue> params = readParams();
if (!info.func)
error("item command '%s' (0x%02x) unimplemented", info.name, commandType);
(this->*(info.func))(params);
}
void LBCode::itemIsPlaying(const Common::Array<LBValue> ¶ms) {
// TODO
warning("ignoring isPlaying");
_stack.push(0);
}
void LBCode::itemSetParent(const Common::Array<LBValue> ¶ms) {
if (params.size() > 2)
error("incorrect number of parameters (%d) to setParent", params.size());
// TODO
warning("ignoring setParent");
}
void LBCode::runNotifyCommand() {
byte commandType = _currValue.integer;
switch (commandType) {
case kLBNotifyChangePage:
{
debugN("goto");
Common::Array<LBValue> params = readParams();
// TODO: type-checking
NotifyEvent notifyEvent(kLBNotifyChangePage, 0);
switch (params.size()) {
case 4:
notifyEvent.type = kLBNotifyChangeMode; // FIXME: type 8?
notifyEvent.newUnknown = params[0].integer; // FIXME: this is newLanguage
notifyEvent.newMode = params[1].integer;
notifyEvent.newPage = params[2].integer;
notifyEvent.newSubpage = params[3].integer;
break;
case 2:
notifyEvent.type = kLBNotifyChangeMode;
// FIXME: newPage and newSubpage?
error("can't handle goto with 2 params");
break;
case 1:
notifyEvent.param = params[0].integer;
break;
case 0:
// FIXME: use cur page?
error("can't handle goto with 0 params");
break;
default:
error("incorrect number of parameters (%d) to goto", params.size());
}
_vm->addNotifyEvent(notifyEvent);
}
break;
case kLBNotifyGoToControls:
case kLBNotifyGotoQuit:
{
debugN(commandType == kLBNotifyGoToControls ? "gotocontrol" : "gotoquit");
Common::Array<LBValue> params = readParams();
if (params.size() != 0)
error("incorrect number of parameters (%d) to notify", params.size());
_vm->addNotifyEvent(NotifyEvent(commandType, 0));
}
break;
case kLBNotifyIntroDone:
{
debugN("startphasemain");
Common::Array<LBValue> params = readParams();
if (params.size() != 0)
error("incorrect number of parameters (%d) to startphasemain", params.size());
_vm->addNotifyEvent(NotifyEvent(kLBNotifyIntroDone, 1));
}
break;
case kLBNotifyQuit:
{
debugN("quit");
Common::Array<LBValue> params = readParams();
if (params.size() != 0)
error("incorrect number of parameters (%d) to quit", params.size());
_vm->addNotifyEvent(NotifyEvent(kLBNotifyQuit, 0));
}
break;
default:
error("unknown notify command %02x in code", commandType);
}
}
} // End of namespace Mohawk
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