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/* ScummVM - Scumm Interpreter
* Copyright (C) 2003 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* $Header$
*
*/
#include "queen/queen.h"
#include "queen/resource.h"
namespace Queen {
#define DEMO_JAS_VERSION_OFFSET 0x119A8
#define JAS_VERSION_OFFSET 0x12484
static const char *dataFilename = "queen.1";
static const char *tableFilename = "queen.tbl";
const GameVersion Resource::_gameVersions[] = {
{ "PEM10", true, false, 0x00000008 },
{ "CEM10", false, false, 0x0000584E },
{ "PFM10", true, false, 0x0002CD93 },
{ "CFM10", false, false, 0x00032585 },
{ "PGM10", true, false, 0x00059ACA },
{ "CGM10", false, false, 0x0005F2A7 },
{ "PIM10", true, false, 0x000866B1 },
{ "CIM10", false, false, 0x0008BEE2 },
{ "PE100", true, true, 0x000B343C },
{ "PE100", true, true, 0x000B40F5 }
};
Resource::Resource(const Common::String &datafilePath)
: _resourceEntries(0), _resourceTable(NULL), _datafilePath(datafilePath) {
_resourceFile = new File();
_resourceFile->open(dataFilename, _datafilePath);
if (_resourceFile->isOpen() == false)
error("Could not open resource file '%s%s'", _datafilePath.c_str(), dataFilename);
_gameVersion = detectGameVersion(_resourceFile->size());
if (!readTableFile()) {
//check if it is the english floppy version, for which we have a hardcoded version of the tables
if (!strcmp(_gameVersion->versionString, _gameVersions[VER_ENG_FLOPPY].versionString)) {
_gameVersion = &_gameVersions[VER_ENG_FLOPPY];
_resourceEntries = 1076;
_resourceTable = _resourceTablePEM10;
} else {
error("Couldn't find tablefile '%s%s'", _datafilePath.c_str(), tableFilename);
}
}
if (strcmp(_gameVersion->versionString, JASVersion()))
error("Verifying game version failed! (expected: '%s', found: '%s')", _gameVersion->versionString, JASVersion());
debug(5, "Detected game version: %s, which has %d resource entries", _gameVersion->versionString, _resourceEntries);
}
Resource::~Resource() {
_resourceFile->close();
if(_resourceTable != _resourceTablePEM10)
delete[] _resourceTable;
}
int32 Resource::resourceIndex(const char *filename) {
char entryName[14];
char *ptr = entryName;
assert(strlen(filename));
strcpy(entryName, filename);
do
*ptr = toupper(*ptr);
while (*ptr++);
uint32 low = 0;
uint32 high = _resourceEntries - 1;
if (!strcmp(entryName, _resourceTable[low].filename))
return low;
if (!strcmp(entryName, _resourceTable[high].filename))
return high;
//Use simple binary search to locate file
for(;;) {
uint32 cur = (low + high) / 2;
int32 diff = strcmp(entryName, _resourceTable[cur].filename);
if (!diff)
return cur;
if ((cur == low) || (cur == high))
break;
if (diff > 0)
low = cur;
else
high = cur;
}
error("Couldn't find file '%s'", entryName);
return -1;
}
uint32 Resource::fileSize(const char *filename) {
return _resourceTable[resourceIndex(filename)].size;
}
uint32 Resource::fileOffset(const char *filename) {
return _resourceTable[resourceIndex(filename)].offset;
}
uint8 *Resource::loadFile(const char *filename, uint32 skipBytes) {
uint32 size = fileSize(filename);
byte *mem = new byte[size];
// skip 'skipBytes' bytes (useful for headers)
_resourceFile->seek(fileOffset(filename) + skipBytes, SEEK_SET);
_resourceFile->read(mem, size - skipBytes);
return mem;
}
bool Resource::exists(const char *filename) {
return resourceIndex(filename) >= 0;
}
const char *Resource::JASVersion() {
static char versionStr[6];
if (_gameVersion->isDemo)
_resourceFile->seek(fileOffset("QUEEN.JAS") + DEMO_JAS_VERSION_OFFSET, SEEK_SET );
else
_resourceFile->seek(fileOffset("QUEEN.JAS") + JAS_VERSION_OFFSET, SEEK_SET);
_resourceFile->read(versionStr, 6);
return versionStr;
}
bool Resource::isDemo() {
return _gameVersion->isDemo;
}
const GameVersion *Resource::detectGameVersion(uint32 dataFilesize) {
const GameVersion *pgv = NULL;
//detect game version based on resource file size.
//we try to verify that it is indeed the version we think it is later on
switch(dataFilesize) {
case 3724538:
pgv = &_gameVersions[VER_DEMO_PCGAMES];
break;
case 3732177:
pgv = &_gameVersions[VER_DEMO];
break;
case 22677657:
pgv = &_gameVersions[VER_ENG_FLOPPY];
break;
case 190787021:
pgv = &_gameVersions[VER_ENG_TALKIE];
break;
case 22157304: // computed from FREH_FAT.H
pgv = &_gameVersions[VER_FRE_FLOPPY];
break;
case 186689095:
pgv = &_gameVersions[VER_FRE_TALKIE];
break;
case 22240013: // computed from GERH_FAT.H
pgv = &_gameVersions[VER_GER_FLOPPY];
break;
case 217648975: // computed from GERC_FAT.H
pgv = &_gameVersions[VER_GER_TALKIE];
break;
case 22461366: // computed from ITAH_FAT.H
pgv = &_gameVersions[VER_ITA_FLOPPY];
break;
case 190795582: // computed from ITAC_FAT.H
pgv = &_gameVersions[VER_ITA_TALKIE];
break;
default:
error("Unknown/unsupported FOTAQ version");
}
return pgv;
}
bool Resource::readTableFile() {
File tableFile;
tableFile.open(tableFilename, _datafilePath);
if (tableFile.isOpen() && tableFile.readUint32BE() == 'QTBL') {
tableFile.seek(_gameVersion->tableOffset);
_resourceEntries = tableFile.readUint16BE();
_resourceTable = new ResourceEntry[_resourceEntries];
ResourceEntry *pre = _resourceTable;
for (uint32 i = 0; i < _resourceEntries; ++i, ++pre) {
tableFile.read(pre->filename, 12);
pre->filename[12] = '\0';
pre->inBundle = tableFile.readByte();
pre->offset = tableFile.readUint32BE();
pre->size = tableFile.readUint32BE();
}
return true;
}
return false;
}
} // End of namespace Queen
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