diff options
Diffstat (limited to 'engines/wintermute/base/file/base_disk_file.cpp')
| -rw-r--r-- | engines/wintermute/base/file/base_disk_file.cpp | 196 |
1 files changed, 196 insertions, 0 deletions
diff --git a/engines/wintermute/base/file/base_disk_file.cpp b/engines/wintermute/base/file/base_disk_file.cpp new file mode 100644 index 0000000000..2d3951b026 --- /dev/null +++ b/engines/wintermute/base/file/base_disk_file.cpp @@ -0,0 +1,196 @@ +/* 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 file is based on WME Lite. + * http://dead-code.org/redir.php?target=wmelite + * Copyright (c) 2011 Jan Nedoma + */ + +#include "engines/wintermute/dcgf.h" +#include "engines/wintermute/base/file/base_disk_file.h" +#include "engines/wintermute/base/base_file_manager.h" +#include "common/stream.h" +#include "common/memstream.h" +#include "common/file.h" +#include "common/zlib.h" +#include "common/archive.h" +#include "common/tokenizer.h" +#include "common/config-manager.h" + +namespace Wintermute { + +void correctSlashes(char *fileName) { + for (size_t i = 0; i < strlen(fileName); i++) { + if (fileName[i] == '\\') { + fileName[i] = '/'; + } + } +} + +// Parse a relative path in the game-folder, and if it exists, return a FSNode to it. +static Common::FSNode getNodeForRelativePath(const Common::String &filename) { + // The filename can be an explicit path, thus we need to chop it up, expecting the path the game + // specifies to follow the Windows-convention of folder\subfolder\file (absolute paths should not happen) + + // Absolute path: These should have been handled in openDiskFile. + if (filename.contains(':')) { + // So just return an invalid node. + return Common::FSNode(); + } + + // Relative path: + if (filename.contains('\\')) { + Common::StringTokenizer path(filename, "\\"); + + // Start traversing relative to the game-data-dir + const Common::FSNode gameDataDir(ConfMan.get("path")); + Common::FSNode curNode = gameDataDir; + + // Parse all path-elements + while (!path.empty()) { + // Get the next path-component by slicing on '\\' + Common::String pathPart = path.nextToken(); + // Get the next FSNode in the chain, if it exists as a child from the previous. + curNode = curNode.getChild(pathPart); + if (!curNode.isReadable()) { + // Return an invalid FSNode. + return Common::FSNode(); + } + // Following the comments in common/fs.h, anything not a directory is a file. + if (!curNode.isDirectory()) { + if (!path.empty()) { + error("Relative path %s reached a file before the end of the path", filename.c_str()); + } + return curNode; + } + } + } + // Return an invalid FSNode to mark that we didn't find the requested file. + return Common::FSNode(); +} + +bool diskFileExists(const Common::String &filename) { + // Try directly from SearchMan first + Common::ArchiveMemberList files; + SearchMan.listMatchingMembers(files, filename); + + for (Common::ArchiveMemberList::iterator it = files.begin(); it != files.end(); ++it) { + if ((*it)->getName() == filename) { + return true; + } + } + // File wasn't found in SearchMan, try to parse the path as a relative path. + Common::FSNode searchNode = getNodeForRelativePath(filename); + if (searchNode.exists() && !searchNode.isDirectory() && searchNode.isReadable()) { + return true; + } + return false; +} + +Common::SeekableReadStream *openDiskFile(const Common::String &filename) { + uint32 prefixSize = 0; + Common::SeekableReadStream *file = NULL; + Common::String fixedFilename = filename; + + // Absolute path: TODO: Add specific fallbacks here. + if (filename.contains(':')) { + if (filename.hasPrefix("c:\\windows\\fonts\\")) { // East Side Story refers to "c:\windows\fonts\framd.ttf" + fixedFilename = filename.c_str() + 17; + } else { + error("openDiskFile::Absolute path or invalid filename used in %s", filename.c_str()); + } + } + // Try directly from SearchMan first + Common::ArchiveMemberList files; + SearchMan.listMatchingMembers(files, fixedFilename); + + for (Common::ArchiveMemberList::iterator it = files.begin(); it != files.end(); ++it) { + if ((*it)->getName() == filename) { + file = (*it)->createReadStream(); + break; + } + } + // File wasn't found in SearchMan, try to parse the path as a relative path. + if (!file) { + Common::FSNode searchNode = getNodeForRelativePath(filename); + if (searchNode.exists() && !searchNode.isDirectory() && searchNode.isReadable()) { + file = searchNode.createReadStream(); + } + } + if (file) { + uint32 magic1, magic2; + magic1 = file->readUint32LE(); + magic2 = file->readUint32LE(); + + bool compressed = false; + if (magic1 == DCGF_MAGIC && magic2 == COMPRESSED_FILE_MAGIC) { + compressed = true; + } + + if (compressed) { + uint32 dataOffset, compSize, uncompSize; + dataOffset = file->readUint32LE(); + compSize = file->readUint32LE(); + uncompSize = file->readUint32LE(); + + byte *compBuffer = new byte[compSize]; + if (!compBuffer) { + error("Error allocating memory for compressed file '%s'", filename.c_str()); + delete file; + return NULL; + } + + byte *data = new byte[uncompSize]; + if (!data) { + error("Error allocating buffer for file '%s'", filename.c_str()); + delete[] compBuffer; + delete file; + return NULL; + } + file->seek(dataOffset + prefixSize, SEEK_SET); + file->read(compBuffer, compSize); + + if (Common::uncompress(data, (unsigned long *)&uncompSize, compBuffer, compSize) != true) { + error("Error uncompressing file '%s'", filename.c_str()); + delete[] compBuffer; + delete file; + return NULL; + } + + delete[] compBuffer; + + return new Common::MemoryReadStream(data, uncompSize, DisposeAfterUse::YES); + delete file; + file = NULL; + } else { + file->seek(0, SEEK_SET); + return file; + } + + return file; + + } + return NULL; +} + +} // end of namespace Wintermute |