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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 "common/endian.h"
#include "gob/gob.h"
#include "gob/dataio.h"
#include "gob/global.h"
#include "gob/util.h"
namespace Gob {
DataStream::DataStream(DataIO &io, int16 handle, uint32 dSize, bool dispose) {
_io = &io;
_handle = handle;
_size = dSize;
_dispose = dispose;
_data = 0;
_stream = 0;
}
DataStream::DataStream(byte *buf, uint32 dSize, bool dispose) {
_data = buf;
_size = dSize;
_stream = new Common::MemoryReadStream(_data, _size);
_dispose = dispose;
_io = 0;
_handle = -1;
}
DataStream::~DataStream() {
delete _stream;
if (_dispose) {
delete[] _data;
if ((_handle >= 0) && _io)
_io->closeData(_handle);
}
}
int32 DataStream::pos() const {
if (_stream)
return _stream->pos();
int32 resPos = _io->getChunkPos(_handle);
if (resPos != -1)
return resPos;
return _io->file_getHandle(_handle)->pos();
}
int32 DataStream::size() const {
if (_stream)
return _stream->size();
return _size;
}
bool DataStream::seek(int32 offset, int whence) {
if (_stream)
return _stream->seek(offset, whence);
else if ((_handle < 50) || (_handle >= 128))
return _io->file_getHandle(_handle)->seek(offset, whence);
else {
_io->seekChunk(_handle, offset, whence);
return true;
}
}
bool DataStream::eos() const {
if (_stream)
return _stream->eos();
return pos() >= size();
}
uint32 DataStream::read(void *dataPtr, uint32 dataSize) {
if (_stream)
return _stream->read(dataPtr, dataSize);
if ((_handle < 50) || (_handle >= 128))
return _io->file_getHandle(_handle)->read((byte *) dataPtr, dataSize);
byte *data = (byte *) dataPtr;
uint32 haveRead = 0;
while (dataSize > 0x3FFF) {
_io->readChunk(_handle, (byte *) data, 0x3FFF);
dataSize -= 0x3FFF;
data += 0x3FFF;
haveRead += 0x3FFF;
}
_io->readChunk(_handle, (byte *) data, dataSize);
return haveRead + dataSize;
}
DataIO::DataIO(GobEngine *vm) : _vm(vm) {
for (int i = 0; i < MAX_DATA_FILES; i++) {
_dataFiles[i] = 0;
_numDataChunks[i] = 0;
_dataFileHandles[i] = -1;
}
_packedSize = 0;
}
DataIO::~DataIO() {
for (int i = 0; i < MAX_DATA_FILES; i++) {
if (_dataFiles[i])
file_getHandle(_dataFileHandles[i])->close();
delete[] _dataFiles[i];
}
}
int32 DataIO::unpackData(byte *src, byte *dest) {
uint32 realSize;
uint32 counter;
uint16 cmd;
byte *tmpBuf;
int16 off;
byte len;
uint16 tmpIndex;
tmpBuf = new byte[4114];
assert(tmpBuf);
counter = realSize = READ_LE_UINT32(src);
for (int i = 0; i < 4078; i++)
tmpBuf[i] = 0x20;
tmpIndex = 4078;
src += 4;
cmd = 0;
while (1) {
cmd >>= 1;
if ((cmd & 0x0100) == 0) {
cmd = *src | 0xFF00;
src++;
}
if ((cmd & 1) != 0) { /* copy */
*dest++ = *src;
tmpBuf[tmpIndex] = *src;
src++;
tmpIndex++;
tmpIndex %= 4096;
counter--;
if (counter == 0)
break;
} else { /* copy string */
off = *src++;
off |= (*src & 0xF0) << 4;
len = (*src & 0x0F) + 3;
src++;
for (int i = 0; i < len; i++) {
*dest++ = tmpBuf[(off + i) % 4096];
counter--;
if (counter == 0) {
delete[] tmpBuf;
return realSize;
}
tmpBuf[tmpIndex] = tmpBuf[(off + i) % 4096];
tmpIndex++;
tmpIndex %= 4096;
}
}
}
delete[] tmpBuf;
return realSize;
}
Common::File *DataIO::file_getHandle(int16 handle) {
return &_filesHandles[handle];
}
const Common::File *DataIO::file_getHandle(int16 handle) const {
return &_filesHandles[handle];
}
int16 DataIO::file_open(const char *path) {
int16 i;
for (i = 0; i < MAX_FILES; i++) {
if (!file_getHandle(i)->isOpen())
break;
}
if (i == MAX_FILES)
return -1;
file_getHandle(i)->open(path);
if (file_getHandle(i)->isOpen())
return i;
return -1;
}
int16 DataIO::getChunk(const char *chunkName) {
int16 slot;
struct ChunkDesc *dataDesc;
for (int16 file = 0; file < MAX_DATA_FILES; file++) {
if (_dataFiles[file] == 0)
return -1;
for (slot = 0; slot < MAX_SLOT_COUNT; slot++)
if (_chunkPos[file * MAX_SLOT_COUNT + slot] == -1)
break;
if (slot == MAX_SLOT_COUNT) {
warning("Chunk slots full");
return -1;
}
dataDesc = _dataFiles[file];
for (int16 chunk = 0; chunk < _numDataChunks[file]; chunk++, dataDesc++) {
if (scumm_stricmp(chunkName, dataDesc->chunkName) != 0)
continue;
_isCurrentSlot[file * MAX_SLOT_COUNT + slot] = false;
_chunkSize[file * MAX_SLOT_COUNT + slot] = dataDesc->size;
_chunkOffset[file * MAX_SLOT_COUNT + slot] = dataDesc->offset;
_chunkPos[file * MAX_SLOT_COUNT + slot] = 0;
return file * 10 + slot + 50;
}
}
return -1;
}
char DataIO::freeChunk(int16 handle) {
if ((handle >= 50) && (handle < 128)) {
handle -= 50;
_chunkPos[(handle / 10) * MAX_SLOT_COUNT + (handle % 10)] = -1;
return 0;
}
return 1;
}
int32 DataIO::readChunk(int16 handle, byte *buf, uint16 size) {
int16 file;
int16 slot;
int16 i;
int32 offset;
if ((handle < 50) || (handle >= 128))
return -2;
file = (handle - 50) / 10;
slot = (handle - 50) % 10;
int index = file * MAX_SLOT_COUNT + slot;
_chunkPos[index] = CLIP<int32>(_chunkPos[index], 0, _chunkSize[index]);
if (!_isCurrentSlot[index]) {
for (i = 0; i < MAX_SLOT_COUNT; i++)
_isCurrentSlot[file * MAX_SLOT_COUNT + i] = false;
offset = _chunkOffset[index] + _chunkPos[index];
debugC(7, kDebugFileIO, "seek: %d, %d", _chunkOffset[index], _chunkPos[index]);
file_getHandle(_dataFileHandles[file])->seek(offset, SEEK_SET);
}
_isCurrentSlot[index] = true;
if ((_chunkPos[index] + size) > (_chunkSize[index]))
size = _chunkSize[index] - _chunkPos[index];
file_getHandle(_dataFileHandles[file])->read(buf, size);
_chunkPos[index] += size;
return size;
}
int16 DataIO::seekChunk(int16 handle, int32 pos, int16 from) {
int16 file;
int16 slot;
if ((handle < 50) || (handle >= 128))
return -1;
file = (handle - 50) / 10;
slot = (handle - 50) % 10;
int index = file * MAX_SLOT_COUNT + slot;
_isCurrentSlot[index] = false;
if (from == SEEK_SET)
_chunkPos[index] = pos;
else
_chunkPos[index] += pos;
return _chunkPos[index];
}
uint32 DataIO::getChunkPos(int16 handle) const {
int16 file;
int16 slot;
if ((handle < 50) || (handle >= 128))
return 0xFFFFFFFF;
file = (handle - 50) / 10;
slot = (handle - 50) % 10;
return _chunkPos[file * MAX_SLOT_COUNT + slot];
}
int32 DataIO::getChunkSize(const char *chunkName) {
int16 file;
int16 chunk;
struct ChunkDesc *dataDesc;
int16 slot;
int32 realSize;
for (file = 0; file < MAX_DATA_FILES; file++) {
if (_dataFiles[file] == 0)
return -1;
dataDesc = _dataFiles[file];
for (chunk = 0; chunk < _numDataChunks[file]; chunk++, dataDesc++) {
if (scumm_stricmp(chunkName, dataDesc->chunkName) != 0)
continue;
if (dataDesc->packed == 0) {
_packedSize = -1;
return dataDesc->size;
}
for (slot = 0; slot < MAX_SLOT_COUNT; slot++)
_isCurrentSlot[slot] = false;
file_getHandle(_dataFileHandles[file])->seek(dataDesc->offset, SEEK_SET);
realSize = file_getHandle(_dataFileHandles[file])->readUint32LE();
_packedSize = dataDesc->size;
return realSize;
}
}
return -1;
}
void DataIO::openDataFile(const char *src, bool itk) {
ChunkDesc *dataDesc;
char path[128];
int16 file;
strncpy0(path, src, 127);
if (!strchr(path, '.')) {
path[123] = 0;
strcat(path, ".stk");
}
for (file = 0; file < MAX_DATA_FILES; file++)
if (_dataFiles[file] == 0)
break;
if (file == MAX_DATA_FILES)
error("DataIO::openDataFile(): Data file slots are full");
_dataFileHandles[file] = file_open(path);
if (_dataFileHandles[file] == -1)
error("DataIO::openDataFile(): Can't open data file \"%s\"", path);
_dataFileItk[file] = itk;
_numDataChunks[file] = file_getHandle(_dataFileHandles[file])->readUint16LE();
debugC(7, kDebugFileIO, "DataChunks: %d [for %s]", _numDataChunks[file], path);
dataDesc = new ChunkDesc[_numDataChunks[file]];
_dataFiles[file] = dataDesc;
for (int i = 0; i < _numDataChunks[file]; i++) {
file_getHandle(_dataFileHandles[file])->read(dataDesc[i].chunkName, 13);
dataDesc[i].size = file_getHandle(_dataFileHandles[file])->readUint32LE();
dataDesc[i].offset = file_getHandle(_dataFileHandles[file])->readUint32LE();
dataDesc[i].packed = file_getHandle(_dataFileHandles[file])->readByte();
// Replacing cyrillic characters
Util::replaceChar(dataDesc[i].chunkName, (char) 0x85, 'E');
Util::replaceChar(dataDesc[i].chunkName, (char) 0x8A, 'K');
Util::replaceChar(dataDesc[i].chunkName, (char) 0x8E, 'O');
Util::replaceChar(dataDesc[i].chunkName, (char) 0x91, 'C');
Util::replaceChar(dataDesc[i].chunkName, (char) 0x92, 'T');
}
for (int i = 0; i < _numDataChunks[file]; i++)
debugC(7, kDebugFileIO, "%d: %s %d", i, dataDesc[i].chunkName, dataDesc[i].size);
for (int i = 0; i < MAX_SLOT_COUNT; i++)
_chunkPos[file * MAX_SLOT_COUNT + i] = -1;
}
void DataIO::closeDataFile(bool itk) {
for (int file = MAX_DATA_FILES - 1; file >= 0; file--) {
if (_dataFiles[file] && (_dataFileItk[file] == itk)) {
delete[] _dataFiles[file];
_dataFiles[file] = 0;
file_getHandle(_dataFileHandles[file])->close();
return;
}
}
}
byte *DataIO::getUnpackedData(const char *name) {
int32 realSize;
int16 chunk;
byte *unpackBuf;
byte *packBuf;
byte *ptr;
int32 sizeLeft;
realSize = getChunkSize(name);
if ((_packedSize == -1) || (realSize == -1))
return 0;
chunk = getChunk(name);
if (chunk == -1)
return 0;
unpackBuf = new byte[realSize];
assert(unpackBuf);
packBuf = new byte[_packedSize];
assert(packBuf);
sizeLeft = _packedSize;
ptr = packBuf;
while (sizeLeft > 0x4000) {
readChunk(chunk, ptr, 0x4000);
sizeLeft -= 0x4000;
ptr += 0x4000;
}
readChunk(chunk, ptr, sizeLeft);
freeChunk(chunk);
unpackData(packBuf, unpackBuf);
delete[] packBuf;
return unpackBuf;
}
void DataIO::closeData(int16 handle) {
if (freeChunk(handle) != 0)
file_getHandle(handle)->close();
}
int16 DataIO::openData(const char *path) {
int16 handle;
handle = getChunk(path);
if (handle >= 0)
return handle;
return file_open(path);
}
DataStream *DataIO::openAsStream(int16 handle, bool dispose) {
uint32 curPos = getPos(handle);
seekData(handle, 0, SEEK_END);
uint32 size = getPos(handle);
seekData(handle, curPos, SEEK_SET);
return new DataStream(*this, handle, size, dispose);
}
uint32 DataIO::getPos(int16 handle) {
uint32 resPos;
resPos = getChunkPos(handle);
if (resPos != 0xFFFFFFFF)
return resPos;
return file_getHandle(handle)->pos();
}
void DataIO::seekData(int16 handle, int32 pos, int16 from) {
int32 resPos;
resPos = seekChunk(handle, pos, from);
if (resPos != -1)
return;
file_getHandle(handle)->seek(pos, from);
}
int32 DataIO::readData(int16 handle, byte *buf, uint16 size) {
int32 res;
res = readChunk(handle, buf, size);
if (res >= 0)
return res;
return file_getHandle(handle)->read(buf, size);
}
int32 DataIO::getDataSize(const char *name) {
char buf[128];
int32 chunkSz;
Common::File file;
strncpy0(buf, name, 127);
chunkSz = getChunkSize(buf);
if (chunkSz >= 0)
return chunkSz;
if (!file.open(buf))
error("DataIO::getDataSize(): Can't find data \"%s\"", name);
chunkSz = file.size();
file.close();
return chunkSz;
}
byte *DataIO::getData(const char *path) {
byte *data;
byte *ptr;
int32 size;
int16 handle;
data = getUnpackedData(path);
if (data)
return data;
size = getDataSize(path);
data = new byte[size];
assert(data);
handle = openData(path);
ptr = data;
while (size > 0x4000) {
readData(handle, ptr, 0x4000);
size -= 0x4000;
ptr += 0x4000;
}
readData(handle, ptr, size);
closeData(handle);
return data;
}
DataStream *DataIO::getDataStream(const char *path) {
uint32 size = getDataSize(path);
byte *data = getData(path);
return new DataStream(data, size);
}
} // End of namespace Gob
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