mirror of
https://github.com/libretro/scummvm.git
synced 2024-12-14 21:59:17 +00:00
499 lines
11 KiB
C++
499 lines
11 KiB
C++
/* 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 "scumm/file.h"
|
|
|
|
#include "scumm/scumm.h"
|
|
|
|
using Common::File;
|
|
|
|
namespace Scumm {
|
|
|
|
#pragma mark -
|
|
#pragma mark --- ScummFile ---
|
|
#pragma mark -
|
|
|
|
ScummFile::ScummFile() : _encbyte(0), _subFileStart(0), _subFileLen(0) {
|
|
}
|
|
|
|
void ScummFile::setEnc(byte value) {
|
|
_encbyte = value;
|
|
}
|
|
|
|
void ScummFile::setSubfileRange(int32 start, int32 len) {
|
|
// TODO: Add sanity checks
|
|
const int32 fileSize = File::size();
|
|
assert(start <= fileSize);
|
|
assert(start + len <= fileSize);
|
|
_subFileStart = start;
|
|
_subFileLen = len;
|
|
seek(0, SEEK_SET);
|
|
}
|
|
|
|
void ScummFile::resetSubfile() {
|
|
_subFileStart = 0;
|
|
_subFileLen = 0;
|
|
seek(0, SEEK_SET);
|
|
}
|
|
|
|
bool ScummFile::open(const Common::String &filename) {
|
|
if (File::open(filename)) {
|
|
resetSubfile();
|
|
return true;
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
bool ScummFile::openSubFile(const Common::String &filename) {
|
|
assert(isOpen());
|
|
|
|
// Disable the XOR encryption and reset any current subfile range
|
|
setEnc(0);
|
|
resetSubfile();
|
|
|
|
// Read in the filename table and look for the specified file
|
|
|
|
unsigned long file_off, file_len;
|
|
char file_name[0x20+1];
|
|
unsigned long i;
|
|
|
|
// Get the length of the data file to use for consistency checks
|
|
const uint32 data_file_len = size();
|
|
|
|
// Read offset and length to the file records */
|
|
const uint32 file_record_off = readUint32BE();
|
|
const uint32 file_record_len = readUint32BE();
|
|
|
|
// Do a quick check to make sure the offset and length are good
|
|
if (file_record_off + file_record_len > data_file_len) {
|
|
return false;
|
|
}
|
|
|
|
// Do a little consistancy check on file_record_length
|
|
if (file_record_len % 0x28) {
|
|
return false;
|
|
}
|
|
|
|
// Scan through the files
|
|
for (i = 0; i < file_record_len; i += 0x28) {
|
|
// read a file record
|
|
seek(file_record_off + i, SEEK_SET);
|
|
file_off = readUint32BE();
|
|
file_len = readUint32BE();
|
|
read(file_name, 0x20);
|
|
file_name[0x20] = 0;
|
|
|
|
assert(file_name[0]);
|
|
//debug(7, " extracting \'%s\'", file_name);
|
|
|
|
// Consistency check. make sure the file data is in the file
|
|
if (file_off + file_len > data_file_len) {
|
|
return false;
|
|
}
|
|
|
|
if (scumm_stricmp(file_name, filename.c_str()) == 0) {
|
|
// We got a match!
|
|
setSubfileRange(file_off, file_len);
|
|
return true;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
|
|
bool ScummFile::eos() const {
|
|
return _subFileLen ? _myEos : File::eos();
|
|
}
|
|
|
|
int32 ScummFile::pos() const {
|
|
return File::pos() - _subFileStart;
|
|
}
|
|
|
|
int32 ScummFile::size() const {
|
|
return _subFileLen ? _subFileLen : File::size();
|
|
}
|
|
|
|
bool ScummFile::seek(int32 offs, int whence) {
|
|
if (_subFileLen) {
|
|
// Constrain the seek to the subfile
|
|
switch (whence) {
|
|
case SEEK_END:
|
|
offs = _subFileStart + _subFileLen + offs;
|
|
break;
|
|
case SEEK_SET:
|
|
offs += _subFileStart;
|
|
break;
|
|
case SEEK_CUR:
|
|
offs += File::pos();
|
|
break;
|
|
}
|
|
assert((int32)_subFileStart <= offs && offs <= (int32)(_subFileStart + _subFileLen));
|
|
whence = SEEK_SET;
|
|
}
|
|
bool ret = File::seek(offs, whence);
|
|
if (ret)
|
|
_myEos = false;
|
|
return ret;
|
|
}
|
|
|
|
uint32 ScummFile::read(void *dataPtr, uint32 dataSize) {
|
|
uint32 realLen;
|
|
|
|
if (_subFileLen) {
|
|
// Limit the amount we read by the subfile boundaries.
|
|
const int32 curPos = pos();
|
|
assert(_subFileLen >= curPos);
|
|
int32 newPos = curPos + dataSize;
|
|
if (newPos > _subFileLen) {
|
|
dataSize = _subFileLen - curPos;
|
|
_myEos = true;
|
|
}
|
|
}
|
|
|
|
realLen = File::read(dataPtr, dataSize);
|
|
|
|
|
|
// If an encryption byte was specified, XOR the data we just read by it.
|
|
// This simple kind of "encryption" was used by some of the older SCUMM
|
|
// games.
|
|
if (_encbyte) {
|
|
byte *p = (byte *)dataPtr;
|
|
byte *end = p + realLen;
|
|
while (p < end)
|
|
*p++ ^= _encbyte;
|
|
}
|
|
|
|
return realLen;
|
|
}
|
|
|
|
#pragma mark -
|
|
#pragma mark --- ScummDiskImage ---
|
|
#pragma mark -
|
|
|
|
static const int maniacResourcesPerFile[55] = {
|
|
0, 11, 1, 3, 9, 12, 1, 13, 10, 6,
|
|
4, 1, 7, 1, 1, 2, 7, 8, 19, 9,
|
|
6, 9, 2, 6, 8, 4, 16, 8, 3, 3,
|
|
12, 12, 2, 8, 1, 1, 2, 1, 9, 1,
|
|
3, 7, 3, 3, 13, 5, 4, 3, 1, 1,
|
|
3, 10, 1, 0, 0
|
|
};
|
|
|
|
static const int zakResourcesPerFile[59] = {
|
|
0, 29, 12, 14, 13, 4, 4, 10, 7, 4,
|
|
14, 19, 5, 4, 7, 6, 11, 9, 4, 4,
|
|
1, 3, 3, 5, 1, 9, 4, 10, 13, 6,
|
|
7, 10, 2, 6, 1, 11, 2, 5, 7, 1,
|
|
7, 1, 4, 2, 8, 6, 6, 6, 4, 13,
|
|
3, 1, 2, 1, 2, 1, 10, 1, 1
|
|
};
|
|
|
|
|
|
static uint16 write_byte(Common::WriteStream *out, byte val) {
|
|
val ^= 0xFF;
|
|
if (out != 0)
|
|
out->writeByte(val);
|
|
return 1;
|
|
}
|
|
|
|
static uint16 write_word(Common::WriteStream *out, uint16 val) {
|
|
val ^= 0xFFFF;
|
|
if (out != 0)
|
|
out->writeUint16LE(val);
|
|
return 2;
|
|
}
|
|
|
|
ScummDiskImage::ScummDiskImage(const char *disk1, const char *disk2, GameSettings game)
|
|
: _stream(0), _buf(0), _game(game),
|
|
_disk1(disk1), _disk2(disk2), _openedDisk(0) {
|
|
|
|
if (_game.id == GID_MANIAC) {
|
|
_numGlobalObjects = 256;
|
|
_numRooms = 55;
|
|
_numCostumes = 25;
|
|
_numScripts = 160;
|
|
_numSounds = 70;
|
|
_resourcesPerFile = maniacResourcesPerFile;
|
|
} else {
|
|
_numGlobalObjects = 775;
|
|
_numRooms = 59;
|
|
_numCostumes = 38;
|
|
_numScripts = 155;
|
|
_numSounds = 127;
|
|
_resourcesPerFile = zakResourcesPerFile;
|
|
}
|
|
}
|
|
|
|
void ScummDiskImage::setEnc(byte enc) {
|
|
_stream->setEnc(enc);
|
|
}
|
|
|
|
byte ScummDiskImage::fileReadByte() {
|
|
byte b = 0;
|
|
File::read(&b, 1);
|
|
return b;
|
|
}
|
|
|
|
uint16 ScummDiskImage::fileReadUint16LE() {
|
|
uint16 a = fileReadByte();
|
|
uint16 b = fileReadByte();
|
|
return a | (b << 8);
|
|
}
|
|
|
|
bool ScummDiskImage::openDisk(char num) {
|
|
if (num == '1')
|
|
num = 1;
|
|
if (num == '2')
|
|
num = 2;
|
|
|
|
if (_openedDisk != num || !File::isOpen()) {
|
|
if (File::isOpen())
|
|
File::close();
|
|
|
|
if (num == 1)
|
|
File::open(_disk1);
|
|
else if (num == 2)
|
|
File::open(_disk2);
|
|
else {
|
|
error("ScummDiskImage::open(): wrong disk (%c)", num);
|
|
return false;
|
|
}
|
|
|
|
_openedDisk = num;
|
|
|
|
if (!File::isOpen()) {
|
|
error("ScummDiskImage::open(): cannot open disk (%d)", num);
|
|
return false;
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
bool ScummDiskImage::open(const Common::String &filename) {
|
|
uint16 signature;
|
|
|
|
// check signature
|
|
openDisk(1);
|
|
|
|
if (_game.platform == Common::kPlatformApple2GS) {
|
|
File::seek(142080);
|
|
} else {
|
|
File::seek(0);
|
|
}
|
|
|
|
signature = fileReadUint16LE();
|
|
if (signature != 0x0A31) {
|
|
error("ScummDiskImage::open(): signature not found in disk 1");
|
|
return false;
|
|
}
|
|
|
|
extractIndex(0); // Fill in resource arrays
|
|
|
|
openDisk(2);
|
|
|
|
if (_game.platform == Common::kPlatformApple2GS) {
|
|
File::seek(143104);
|
|
signature = fileReadUint16LE();
|
|
if (signature != 0x0032)
|
|
error("Error: signature not found in disk 2");
|
|
} else {
|
|
File::seek(0);
|
|
signature = fileReadUint16LE();
|
|
if (signature != 0x0132)
|
|
error("Error: signature not found in disk 2");
|
|
}
|
|
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
uint16 ScummDiskImage::extractIndex(Common::WriteStream *out) {
|
|
int i;
|
|
uint16 reslen = 0;
|
|
|
|
openDisk(1);
|
|
|
|
if (_game.platform == Common::kPlatformApple2GS) {
|
|
File::seek(142080);
|
|
} else {
|
|
File::seek(0);
|
|
}
|
|
|
|
// skip signature
|
|
fileReadUint16LE();
|
|
|
|
// write expected signature
|
|
if (_game.platform == Common::kPlatformApple2GS) {
|
|
reslen += write_word(out, 0x0032);
|
|
} else {
|
|
reslen += write_word(out, 0x0132);
|
|
}
|
|
|
|
// copy object flags
|
|
for (i = 0; i < _numGlobalObjects; i++)
|
|
reslen += write_byte(out, fileReadByte());
|
|
|
|
// copy room offsets
|
|
for (i = 0; i < _numRooms; i++) {
|
|
_roomDisks[i] = fileReadByte();
|
|
reslen += write_byte(out, _roomDisks[i]);
|
|
}
|
|
for (i = 0; i < _numRooms; i++) {
|
|
_roomSectors[i] = fileReadByte();
|
|
reslen += write_byte(out, _roomSectors[i]);
|
|
_roomTracks[i] = fileReadByte();
|
|
reslen += write_byte(out, _roomTracks[i]);
|
|
}
|
|
for (i = 0; i < _numCostumes; i++)
|
|
reslen += write_byte(out, fileReadByte());
|
|
for (i = 0; i < _numCostumes; i++)
|
|
reslen += write_word(out, fileReadUint16LE());
|
|
|
|
for (i = 0; i < _numScripts; i++)
|
|
reslen += write_byte(out, fileReadByte());
|
|
for (i = 0; i < _numScripts; i++)
|
|
reslen += write_word(out, fileReadUint16LE());
|
|
|
|
for (i = 0; i < _numSounds; i++)
|
|
reslen += write_byte(out, fileReadByte());
|
|
for (i = 0; i < _numSounds; i++)
|
|
reslen += write_word(out, fileReadUint16LE());
|
|
|
|
return reslen;
|
|
}
|
|
|
|
bool ScummDiskImage::generateIndex() {
|
|
int bufsize;
|
|
|
|
bufsize = extractIndex(0);
|
|
|
|
free(_buf);
|
|
_buf = (byte *)calloc(1, bufsize);
|
|
|
|
Common::MemoryWriteStream out(_buf, bufsize);
|
|
|
|
extractIndex(&out);
|
|
|
|
delete _stream;
|
|
_stream = new Common::MemoryReadStream(_buf, bufsize);
|
|
|
|
return true;
|
|
}
|
|
|
|
uint16 ScummDiskImage::extractResource(Common::WriteStream *out, int res) {
|
|
const int AppleSectorOffset[36] = {
|
|
0, 16, 32, 48, 64, 80, 96, 112, 128, 144, 160, 176, 192, 208, 224, 240, 256,
|
|
272, 288, 304, 320, 336, 352, 368,
|
|
384, 400, 416, 432, 448, 464,
|
|
480, 496, 512, 528, 544, 560
|
|
};
|
|
const int C64SectorOffset[36] = {
|
|
0,
|
|
0, 21, 42, 63, 84, 105, 126, 147, 168, 189, 210, 231, 252, 273, 294, 315, 336,
|
|
357, 376, 395, 414, 433, 452, 471,
|
|
490, 508, 526, 544, 562, 580,
|
|
598, 615, 632, 649, 666
|
|
};
|
|
int i;
|
|
uint16 reslen = 0;
|
|
|
|
openDisk(_roomDisks[res]);
|
|
|
|
if (_game.platform == Common::kPlatformApple2GS) {
|
|
File::seek((AppleSectorOffset[_roomTracks[res]] + _roomSectors[res]) * 256);
|
|
} else {
|
|
File::seek((C64SectorOffset[_roomTracks[res]] + _roomSectors[res]) * 256);
|
|
}
|
|
|
|
for (i = 0; i < _resourcesPerFile[res]; i++) {
|
|
uint16 len = fileReadUint16LE();
|
|
reslen += write_word(out, len);
|
|
|
|
for (len -= 2; len > 0; len--)
|
|
reslen += write_byte(out, fileReadByte());
|
|
}
|
|
|
|
return reslen;
|
|
}
|
|
|
|
bool ScummDiskImage::generateResource(int res) {
|
|
int bufsize;
|
|
|
|
if (res >= _numRooms)
|
|
return false;
|
|
|
|
bufsize = extractResource(0, res);
|
|
|
|
free(_buf);
|
|
_buf = (byte *)calloc(1, bufsize);
|
|
|
|
Common::MemoryWriteStream out(_buf, bufsize);
|
|
|
|
extractResource(&out, res);
|
|
|
|
delete _stream;
|
|
_stream = new Common::MemoryReadStream(_buf, bufsize);
|
|
|
|
return true;
|
|
}
|
|
|
|
void ScummDiskImage::close() {
|
|
delete _stream;
|
|
_stream = 0;
|
|
|
|
free(_buf);
|
|
_buf = 0;
|
|
|
|
File::close();
|
|
}
|
|
|
|
bool ScummDiskImage::openSubFile(const Common::String &filename) {
|
|
assert(isOpen());
|
|
|
|
const char *ext = strrchr(filename.c_str(), '.');
|
|
char resNum[3];
|
|
int res;
|
|
|
|
// We always have file name in form of XX.lfl
|
|
resNum[0] = ext[-2];
|
|
resNum[1] = ext[-1];
|
|
resNum[2] = 0;
|
|
|
|
res = atoi(resNum);
|
|
|
|
if (res == 0) {
|
|
return generateIndex();
|
|
} else {
|
|
return generateResource(res);
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
} // End of namespace Scumm
|