diff options
Diffstat (limited to 'lure/disk.cpp')
| -rw-r--r-- | lure/disk.cpp | 174 |
1 files changed, 0 insertions, 174 deletions
diff --git a/lure/disk.cpp b/lure/disk.cpp deleted file mode 100644 index e996ff6ecc..0000000000 --- a/lure/disk.cpp +++ /dev/null @@ -1,174 +0,0 @@ -/* ScummVM - Scumm Interpreter - * Copyright (C) 2005-2006 The ScummVM project - * - * 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 "common/stdafx.h" -#include "common/file.h" -#include "common/util.h" -#include "common/scummsys.h" - -#include "lure/disk.h" -#include "lure/luredefs.h" - -namespace Lure { - -static Disk *int_disk = NULL; - -Disk &Disk::getReference() { - return *int_disk; -} - -Disk::Disk(const Common::String &gameDataPath) { - _gameDataPath = gameDataPath; - _fileNum = 0xff; - _fileHandle = NULL; - int_disk = this; -} - -Disk::~Disk() { - if (_fileHandle) delete _fileHandle; - int_disk = NULL; -} - -uint8 Disk::indexOf(uint16 id, bool suppressError) { - // Make sure the correct file is open - the upper two bits of the Id give the file number. Note - // that an extra check is done for the upper byte of the Id being 0x3f, which is the Id range - // I use for lure.dat resources, which are resources extracted from the lure.exe executable - uint8 entryFileNum = ((id>>8) == 0x3f) ? 0 : ((id >> 14) & 3) + 1; - openFile(entryFileNum); - - // Find the correct entry in the list based on the Id - for (int entryIndex=0; entryIndex<NUM_ENTRIES_IN_HEADER; ++entryIndex) { - if (_entries[entryIndex].id == HEADER_ENTRY_UNUSED_ID) break; - else if (_entries[entryIndex].id == id) return entryIndex; - } - - if (suppressError) return 0xff; - error("Could not find entry Id #%d in file %sdisk%d.vga", id, _gameDataPath.c_str(), _fileNum); -} - -void Disk::openFile(uint8 fileNum) { - // Validate that the file number is correct - if (fileNum > 4) - error("Invalid file number specified - %d", fileNum); - - // Only load up the new file if the current file number has changed - if (fileNum == _fileNum) return; - - // Delete any existing open file handle - if (_fileNum != 0xff) delete _fileHandle; - _fileNum = fileNum; - - // Open up the the new file - _fileHandle = new Common::File(); - - char sFilename[10]; - if (_fileNum == 0) - strcpy(sFilename, SUPPORT_FILENAME); - else - sprintf(sFilename, "disk%d.vga", _fileNum); - - _fileHandle->open(sFilename); - if (!_fileHandle->isOpen()) - error("Could not open %s%s", _gameDataPath.c_str(), sFilename); - - // Validate the header - char buffer[7]; - uint32 bytesRead; - - bytesRead = _fileHandle->read(buffer, 6); - buffer[6] = '\0'; - if (strcmp(buffer, HEADER_IDENT_STRING) != 0) - error("The file %s%s was not a valid VGA file", _gameDataPath.c_str(), sFilename); - - uint16 fileFileNum = _fileHandle->readUint16BE(); - if (fileFileNum != _fileNum) - error("The file %s%s was not the correct file number", _gameDataPath.c_str(), sFilename); - - // Read in the header entries - uint32 headerSize = sizeof(FileEntry) * NUM_ENTRIES_IN_HEADER; - if (_fileHandle->read(_entries, headerSize) != headerSize) - error("The file %s%s had a corrupted header", _gameDataPath.c_str(), sFilename); - -#ifdef SCUMM_BIG_ENDIAN - // Process the read in header list to convert to big endian - for (int i = 0; i < NUM_ENTRIES_IN_HEADER; ++i) { - _entries[i].id = FROM_LE_16(_entries[i].id); - _entries[i].size = FROM_LE_16(_entries[i].size); - _entries[i].offset = FROM_LE_16(_entries[i].offset); - } -#endif -} - -uint32 Disk::getEntrySize(uint16 id) { - // Get the index of the resource, if necessary opening the correct file - uint8 index = indexOf(id); - - // Calculate the offset and size of the entry - uint32 size = (uint32) _entries[index].size; - if (_entries[index].sizeExtension) size += 0x10000; - - return size; -} - -MemoryBlock *Disk::getEntry(uint16 id) -{ - // Get the index of the resource, if necessary opening the correct file - uint8 index = indexOf(id); - - // Calculate the offset and size of the entry - uint32 size = (uint32) _entries[index].size; - if (_entries[index].sizeExtension) size += 0x10000; - uint32 offset = (uint32) _entries[index].offset * 0x20; - - MemoryBlock *result = Memory::allocate(size); - _fileHandle->seek(offset, SEEK_SET); - _fileHandle->read(result->data(), size); - return result; -} - -bool Disk::exists(uint16 id) { - // Get the index of the resource, if necessary opening the correct file - uint8 index = indexOf(id, true); - return (index != 0xff); -} - -uint8 Disk::numEntries() { - if (_fileNum == 0) - error("No file is currently open"); - - // Figure out how many entries there are by count until an unused entry is found - for (byte entryIndex = 0; entryIndex < NUM_ENTRIES_IN_HEADER; ++entryIndex) - if (_entries[entryIndex].id == HEADER_ENTRY_UNUSED_ID) return entryIndex; - - return NUM_ENTRIES_IN_HEADER; -} - -FileEntry *Disk::getIndex(uint8 entryIndex) { - if (_fileNum == 0) - error("No file is currently open"); - if ((entryIndex >= NUM_ENTRIES_IN_HEADER) || (_entries[entryIndex].id == HEADER_ENTRY_UNUSED_ID)) - error("There is no entry at the specified index"); - - return &_entries[entryIndex]; -} - -} // end of namespace Lure |