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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 "teenagent/pack.h"
#include "common/util.h"
#include "common/debug.h"
#include "common/memstream.h"
#include "common/substream.h"
namespace TeenAgent {
FilePack::FilePack() : offsets(0) {}
FilePack::~FilePack() {
close();
}
void FilePack::close() {
delete[] offsets;
offsets = NULL;
file.close();
}
bool FilePack::open(const Common::String &filename) {
if (!file.exists(filename) || !file.open(filename))
return false;
_fileCount = file.readUint32LE();
debug(0, "opened %s, found %u entries", filename.c_str(), _fileCount);
offsets = new uint32[_fileCount + 1];
for (uint32 i = 0; i <= _fileCount; ++i) {
offsets[i] = file.readUint32LE();
}
return true;
}
uint32 FilePack::getSize(uint32 id) const {
if (id < 1 || id > _fileCount)
return 0;
return offsets[id] - offsets[id - 1];
}
uint32 FilePack::read(uint32 id, byte *dst, uint32 size) const {
if (id < 1 || id > _fileCount)
return 0;
file.seek(offsets[id - 1]);
uint32 rsize = offsets[id] - offsets[id - 1];
uint32 r = file.read(dst, MIN(rsize, size));
//debug(0, "read(%u, %u) = %u", id, size, r);
return r;
}
Common::SeekableReadStream *FilePack::getStream(uint32 id) const {
if (id < 1 || id > _fileCount)
return NULL;
//debug(0, "stream: %04x-%04x", offsets[id - 1], offsets[id]);
return new Common::SeekableSubReadStream(&file, offsets[id - 1], offsets[id]);
}
TransientFilePack::TransientFilePack() : offsets(0) {}
TransientFilePack::~TransientFilePack() {
close();
}
void TransientFilePack::close() {
delete[] offsets;
offsets = NULL;
_filename.clear();
}
bool TransientFilePack::open(const Common::String &filename) {
_filename = filename;
Common::File file;
if (!file.exists(filename) || !file.open(filename))
return false;
_fileCount = file.readUint32LE();
debug(0, "opened %s, found %u entries", filename.c_str(), _fileCount);
offsets = new uint32[_fileCount + 1];
for (uint32 i = 0; i <= _fileCount; ++i) {
offsets[i] = file.readUint32LE();
}
file.close();
return true;
}
uint32 TransientFilePack::getSize(uint32 id) const {
if (id < 1 || id > _fileCount)
return 0;
return offsets[id] - offsets[id - 1];
}
uint32 TransientFilePack::read(uint32 id, byte *dst, uint32 size) const {
if (id < 1 || id > _fileCount)
return 0;
Common::File file;
if (!file.open(_filename))
return 0;
file.seek(offsets[id - 1]);
uint32 rsize = offsets[id] - offsets[id - 1];
uint32 r = file.read(dst, MIN(rsize, size));
file.close();
//debug(0, "read(%u, %u) = %u", id, size, r);
return r;
}
Common::SeekableReadStream *TransientFilePack::getStream(uint32 id) const {
if (id < 1 || id > _fileCount)
return NULL;
//debug(0, "stream: %04x-%04x", offsets[id - 1], offsets[id]);
Common::File file;
if (!file.open(_filename))
return NULL;
file.seek(offsets[id - 1]);
uint32 size = offsets[id] - offsets[id - 1];
byte *ptr = (byte *)malloc(size);
if (ptr == NULL)
return NULL;
uint32 r = file.read(ptr, size);
file.close();
return new Common::MemoryReadStream(ptr, r, DisposeAfterUse::YES);
}
void MemoryPack::close() {
chunks.clear();
}
bool MemoryPack::open(const Common::String &filename) {
Common::File file;
if (!file.exists(filename) || !file.open(filename))
return false;
uint32 count = file.readUint32LE();
debug(0, "opened %s, found %u entries [memory]", filename.c_str(), count);
for (uint32 i = 0; i < count; ++i) {
uint32 offset = file.readUint32LE();
int32 pos = file.pos();
uint32 next_offset = file.readUint32LE();
uint32 size = next_offset - offset;
Chunk chunk;
if (size != 0) {
file.seek(offset);
chunk.data = new byte[size];
chunk.size = size;
file.read(chunk.data, size);
file.seek(pos);
}
chunks.push_back(chunk);
}
file.close();
return true;
}
uint32 MemoryPack::getSize(uint32 id) const {
--id;
return id < chunks.size() ? chunks[id].size : 0;
}
uint32 MemoryPack::read(uint32 id, byte *dst, uint32 size) const {
--id;
if (id >= chunks.size())
return 0;
const Chunk &c = chunks[id];
memcpy(dst, c.data, c.size);
return c.size;
}
Common::SeekableReadStream *MemoryPack::getStream(uint32 id) const {
--id;
if (id >= chunks.size())
return 0;
const Chunk &c = chunks[id];
return new Common::MemoryReadStream(c.data, c.size, DisposeAfterUse::NO);
}
} // End of namespace TeenAgent
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