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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 "teenagent/pack.h"
#include "common/util.h"
#include "common/debug.h"
namespace TeenAgent {
Pack::Pack() : count(0), offsets(0) {}
Pack::~Pack() {
close();
}
void Pack::close() {
delete[] offsets;
offsets = NULL;
file.close();
}
void Pack::open(const Common::String &filename) {
file.open(filename);
count = file.readUint32LE();
debug(0, "opened %s, found %u entries", filename.c_str(), count);
offsets = new uint32[count + 1];
for (uint32 i = 0; i <= count; ++i) {
offsets[i] = file.readUint32LE();
//debug(0, "%d: %06x", i, offsets[i]);
}
/* for (uint32 i = 0; i < count; ++i) {
debug(0, "%d: len = %d", i, offsets[i + 1] - offsets[i]);
}
*/
}
uint32 Pack::get_size(uint32 id) const {
if (id < 1 || id > count)
return 0;
return offsets[id] - offsets[id - 1];
}
uint32 Pack::read(uint32 id, byte *dst, uint32 size) const {
if (id < 1 || id > count)
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 *Pack::getStream(uint32 id) const {
if (id < 1 || id > count)
return 0;
//debug(0, "stream: %04x-%04x", offsets[id - 1], offsets[id]);
return new Common::SeekableSubReadStream(&file, offsets[id - 1], offsets[id], Common::DisposeAfterUse::NO);
}
} // End of namespace TeenAgent
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