mirror of
https://github.com/libretro/scummvm.git
synced 2024-12-14 21:59:17 +00:00
4ae8f43be3
svn-id: r43946
85 lines
2.3 KiB
C++
85 lines
2.3 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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Pack::Pack() : count(0), offsets(0) {}
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Pack::~Pack() {
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close();
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}
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void Pack::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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void Pack::open(const Common::String &filename) {
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file.open(filename);
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count = file.readUint32LE();
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debug(0, "opened %s, found %u entries", filename.c_str(), count);
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offsets = new uint32[count + 1];
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for (uint32 i = 0; i <= 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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}
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uint32 Pack::get_size(uint32 id) const {
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if (id < 1 || id > 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 Pack::read(uint32 id, byte *dst, uint32 size) const {
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if (id < 1 || id > 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 * Pack::getStream(uint32 id) const {
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if (id < 1 || id > 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], false);
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}
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} // End of namespace TeenAgent
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