mirror of
https://github.com/libretro/scummvm.git
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141 lines
3.2 KiB
C++
141 lines
3.2 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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* 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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* 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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*/
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/*
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* This code is based on original Soltys source code
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* Copyright (c) 1994-1995 Janus B. Wisniewski and L.K. Avalon
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*/
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#include "cge/vol.h"
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#include "common/system.h"
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#include "common/str.h"
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#include "cge/cge.h"
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#include "common/debug.h"
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#include "common/debug-channels.h"
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namespace CGE {
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Dat *VFile::_dat = NULL;
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BtFile *VFile::_cat = NULL;
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VFile *VFile::_recent = NULL;
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/*-----------------------------------------------------------------------*/
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Dat::Dat():
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#ifdef VOL_UPD
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_file(DAT_NAME, UPD, CRP)
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#else
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_file(DAT_NAME, kModeRead, CRP)
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#endif
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{
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debugC(1, kCGEDebugFile, "Dat::Dat()");
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}
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/*-----------------------------------------------------------------------*/
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void VFile::init() {
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debugC(1, kCGEDebugFile, "VFile::init()");
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_dat = new Dat();
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#ifdef VOL_UPD
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_cat = new BtFile(CAT_NAME, UPD, CRP);
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#else
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_cat = new BtFile(CAT_NAME, kModeRead, CRP);
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#endif
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_recent = NULL;
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}
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void VFile::deinit() {
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delete _dat;
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delete _cat;
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}
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VFile::VFile(const char *name, IOMode mode)
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: IoBuf(mode, NULL) {
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debugC(3, kCGEDebugFile, "VFile::VFile(%s, %d)", name, mode);
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if (mode == kModeRead) {
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if (_dat->_file._error || _cat->_error)
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error("Bad volume data");
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BtKeypack *kp = _cat->find(name);
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if (scumm_stricmp(kp->_key, name) != 0)
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_error = 1;
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_endMark = (_bufMark = _begMark = kp->_mark) + kp->_size;
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}
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#ifdef VOL_UPD
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else
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Make(name);
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#endif
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}
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VFile::~VFile() {
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if (_recent == this)
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_recent = NULL;
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}
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bool VFile::exist(const char *name) {
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debugC(1, kCGEDebugFile, "VFile::exist(%s)", name);
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return scumm_stricmp(_cat->find(name)->_key, name) == 0;
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}
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void VFile::readBuf() {
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debugC(3, kCGEDebugFile, "VFile::readBuf()");
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if (_recent != this) {
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_dat->_file.seek(_bufMark + _lim);
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_recent = this;
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}
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_bufMark = _dat->_file.mark();
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long n = _endMark - _bufMark;
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if (n > kBufferSize)
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n = kBufferSize;
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_lim = _dat->_file.read(_buff, (uint16) n);
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_ptr = 0;
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}
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long VFile::mark() {
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debugC(5, kCGEDebugFile, "VFile::mark()");
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return (_bufMark + _ptr) - _begMark;
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}
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long VFile::size() {
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debugC(1, kCGEDebugFile, "VFile::size()");
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return _endMark - _begMark;
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}
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long VFile::seek(long pos) {
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debugC(1, kCGEDebugFile, "VFile::seel(%ld)", pos);
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_recent = NULL;
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_lim = 0;
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return (_bufMark = _begMark + pos);
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}
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} // End of namespace CGE
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