mirror of
https://github.com/libretro/scummvm.git
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139 lines
3.6 KiB
C++
139 lines
3.6 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* $URL$
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* $Id$
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*/
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#include "teenagent/pack.h"
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#include "common/util.h"
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#include "common/debug.h"
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namespace TeenAgent {
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FilePack::FilePack() : offsets(0) {}
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FilePack::~FilePack() {
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close();
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}
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void FilePack::close() {
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delete[] offsets;
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offsets = NULL;
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file.close();
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}
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bool FilePack::open(const Common::String &filename) {
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if (!file.open(filename))
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return false;
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_files_count = file.readUint32LE();
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debug(0, "opened %s, found %u entries", filename.c_str(), _files_count);
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offsets = new uint32[_files_count + 1];
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for (uint32 i = 0; i <= _files_count; ++i) {
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offsets[i] = file.readUint32LE();
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//debug(0, "%d: %06x", i, offsets[i]);
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}
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/* for (uint32 i = 0; i < count; ++i) {
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debug(0, "%d: len = %d", i, offsets[i + 1] - offsets[i]);
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}
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*/
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return true;
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}
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uint32 FilePack::get_size(uint32 id) const {
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if (id < 1 || id > _files_count)
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return 0;
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return offsets[id] - offsets[id - 1];
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}
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uint32 FilePack::read(uint32 id, byte *dst, uint32 size) const {
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if (id < 1 || id > _files_count)
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return 0;
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file.seek(offsets[id - 1]);
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uint32 rsize = offsets[id] - offsets[id - 1];
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uint32 r = file.read(dst, MIN(rsize, size));
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//debug(0, "read(%u, %u) = %u", id, size, r);
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return r;
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}
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Common::SeekableReadStream *FilePack::getStream(uint32 id) const {
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if (id < 1 || id > _files_count)
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return 0;
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//debug(0, "stream: %04x-%04x", offsets[id - 1], offsets[id]);
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return new Common::SeekableSubReadStream(&file, offsets[id - 1], offsets[id], DisposeAfterUse::NO);
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}
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void MemoryPack::close() {
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chunks.clear();
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}
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bool MemoryPack::open(const Common::String &filename) {
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Common::File file;
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if (!file.open(filename))
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return false;
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uint32 count = file.readUint32LE();
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debug(0, "opened %s, found %u entries [memory]", filename.c_str(), count);
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for (uint32 i = 0; i <= count; ++i) {
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uint32 offset = file.readUint32LE();
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int32 pos = file.pos();
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uint32 next_offset = file.readUint32LE();
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uint32 size = next_offset - offset;
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Chunk chunk;
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if (size != 0) {
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file.seek(offset);
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chunk.data = new byte[size];
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chunk.size = size;
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file.read(chunk.data, size);
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file.seek(pos);
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}
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chunks.push_back(chunk);
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}
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file.close();
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return true;
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}
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uint32 MemoryPack::get_size(uint32 id) const {
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--id;
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return id < chunks.size()? chunks[id].size: 0;
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}
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uint32 MemoryPack::read(uint32 id, byte *dst, uint32 size) const {
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--id;
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if (id >= chunks.size())
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return 0;
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const Chunk &c = chunks[id];
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memcpy(dst, c.data, c.size);
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return c.size;
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}
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Common::SeekableReadStream *MemoryPack::getStream(uint32 id) const {
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--id;
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if (id >= chunks.size())
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return 0;
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const Chunk &c = chunks[id];
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return new Common::MemoryReadStream(c.data, c.size, DisposeAfterUse::NO);
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}
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} // End of namespace TeenAgent
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