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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.
*
*/
/*
* This code is based on original Soltys source code
* Copyright (c) 1994-1995 Janus B. Wisniewski and L.K. Avalon
*/
#include "cge/vol.h"
#include "common/system.h"
#include "common/str.h"
namespace CGE {
Dat *VFile::_dat = NULL;
BtFile *VFile::_cat = NULL;
VFile *VFile::_recent = NULL;
/*-----------------------------------------------------------------------*/
Dat::Dat():
#ifdef VOL_UPD
_file(DAT_NAME, UPD, CRP)
#else
_file(DAT_NAME, REA, CRP)
#endif
{
}
/*-----------------------------------------------------------------------*/
void VFile::init() {
_dat = new Dat();
#ifdef VOL_UPD
_cat = new BtFile(CAT_NAME, UPD, CRP);
#else
_cat = new BtFile(CAT_NAME, REA, CRP);
#endif
_recent = NULL;
}
void VFile::deinit() {
delete _dat;
delete _cat;
}
VFile::VFile(const char *name, IOMODE mode)
: IoBuf(mode) {
if (mode == REA) {
if (_dat->_file._error || _cat->_error)
error("Bad volume data");
BtKeypack *kp = _cat->find(name);
if (scumm_stricmp(kp->_key, name) != 0)
_error = 1;
_endMark = (_bufMark = _begMark = kp->_mark) + kp->_size;
}
#ifdef VOL_UPD
else
Make(name);
#endif
}
VFile::~VFile() {
if (_recent == this)
_recent = NULL;
}
bool VFile::exist(const char *name) {
return scumm_stricmp(_cat->find(name)->_key, name) == 0;
}
void VFile::readBuff() {
if (_recent != this) {
_dat->_file.seek(_bufMark + _lim);
_recent = this;
}
_bufMark = _dat->_file.mark();
long n = _endMark - _bufMark;
if (n > IOBUF_SIZE)
n = IOBUF_SIZE;
_lim = _dat->_file.read(_buff, (uint16) n);
_ptr = 0;
}
long VFile::mark() {
return (_bufMark + _ptr) - _begMark;
}
long VFile::size() {
return _endMark - _begMark;
}
long VFile::seek(long pos) {
_recent = NULL;
_lim = 0;
return (_bufMark = _begMark + pos);
}
} // End of namespace CGE
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