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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.
*
*/
#include "common/file.h"
#include "common/memstream.h"
#include "common/str.h"
#include "common/winexe.h"
#include "common/winexe_ne.h"
#include "common/winexe_pe.h"
namespace Common {
WinResourceID &WinResourceID::operator=(const String &x) {
_name = x;
_idType = kIDTypeString;
return *this;
}
WinResourceID &WinResourceID::operator=(uint32 x) {
_id = x;
_idType = kIDTypeNumerical;
return *this;
}
bool WinResourceID::operator==(const String &x) const {
return _idType == kIDTypeString && _name.equalsIgnoreCase(x);
}
bool WinResourceID::operator==(const uint32 &x) const {
return _idType == kIDTypeNumerical && _id == x;
}
bool WinResourceID::operator==(const WinResourceID &x) const {
if (_idType != x._idType)
return false;
if (_idType == kIDTypeString)
return _name.equalsIgnoreCase(x._name);
if (_idType == kIDTypeNumerical)
return _id == x._id;
return true;
}
String WinResourceID::getString() const {
if (_idType != kIDTypeString)
return "";
return _name;
}
uint32 WinResourceID::getID() const {
if (_idType != kIDTypeNumerical)
return 0xffffffff;
return _id;
}
String WinResourceID::toString() const {
if (_idType == kIDTypeString)
return _name;
else if (_idType == kIDTypeNumerical)
return String::format("0x%08x", _id);
return "";
}
bool WinResources::loadFromEXE(const String &fileName) {
if (fileName.empty())
return false;
File *file = new File();
if (!file->open(fileName)) {
delete file;
return false;
}
return loadFromEXE(file);
}
bool WinResources::loadFromCompressedEXE(const String &fileName) {
// Based on http://www.cabextract.org.uk/libmspack/doc/szdd_kwaj_format.html
// TODO: Merge this with with loadFromEXE() so the handling of the compressed
// EXE's is transparent
File file;
if (!file.open(fileName))
return false;
// First part of the signature
if (file.readUint32BE() != MKTAG('S','Z','D','D'))
return false;
// Second part of the signature
if (file.readUint32BE() != 0x88F02733)
return false;
// Compression mode must be 'A'
if (file.readByte() != 'A')
return false;
file.readByte(); // file name character change
uint32 unpackedLength = file.readUint32LE();
byte *window = new byte[0x1000];
int pos = 0x1000 - 16;
memset(window, 0x20, 0x1000); // Initialize to all spaces
byte *unpackedData = (byte *)malloc(unpackedLength);
assert(unpackedData);
byte *dataPos = unpackedData;
// Apply simple LZSS decompression
for (;;) {
byte controlByte = file.readByte();
if (file.eos())
break;
for (byte i = 0; i < 8; i++) {
if (controlByte & (1 << i)) {
*dataPos++ = window[pos++] = file.readByte();
pos &= 0xFFF;
} else {
int matchPos = file.readByte();
int matchLen = file.readByte();
matchPos |= (matchLen & 0xF0) << 4;
matchLen = (matchLen & 0xF) + 3;
while (matchLen--) {
*dataPos++ = window[pos++] = window[matchPos++];
pos &= 0xFFF;
matchPos &= 0xFFF;
}
}
}
}
delete[] window;
SeekableReadStream *stream = new MemoryReadStream(unpackedData, unpackedLength);
return loadFromEXE(stream);
}
WinResources *WinResources::createFromEXE(const String &fileName) {
WinResources *exe;
// First try loading via the NE code
exe = new Common::NEResources();
if (exe->loadFromEXE(fileName)) {
return exe;
}
delete exe;
// Then try loading via the PE code
exe = new Common::PEResources();
if (exe->loadFromEXE(fileName)) {
return exe;
}
delete exe;
return nullptr;
}
} // End of namespace Common
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