scummvm/common/file.cpp

260 lines
5.8 KiB
C++

/* 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 "common/archive.h"
#include "common/file.h"
#include "common/fs.h"
#include "common/util.h"
#include "common/system.h"
namespace Common {
static Common::SearchSet *s_searchSet = 0;
void File::addDefaultDirectory(const String &directory) {
FilesystemNode dir(directory);
addDefaultDirectoryRecursive(dir, 1);
}
void File::addDefaultDirectoryRecursive(const String &directory, int level) {
FilesystemNode dir(directory);
addDefaultDirectoryRecursive(dir, level);
}
void File::addDefaultDirectory(const FilesystemNode &directory) {
addDefaultDirectoryRecursive(directory, 1);
}
void File::addDefaultDirectoryRecursive(const FilesystemNode &dir, int level) {
if (level <= 0 || !dir.exists() || !dir.isDirectory())
return;
if (!s_searchSet) {
s_searchSet = new Common::SearchSet();
g_system->addSysArchivesToSearchSet(*s_searchSet);
}
Common::ArchivePtr dataArchive(new Common::FSDirectory(dir, level));
s_searchSet->add(dir.getPath(), dataArchive, 1);
}
void File::resetDefaultDirectories() {
delete s_searchSet;
s_searchSet = 0;
}
File::File()
: _handle(0) {
}
File::~File() {
close();
}
bool File::open(const String &filename) {
assert(!filename.empty());
assert(!_handle);
_name.clear();
clearIOFailed();
if (s_searchSet && s_searchSet->hasFile(filename)) {
debug(3, "Opening hashed: %s", filename.c_str());
_handle = s_searchSet->openFile(filename);
} else if (s_searchSet && s_searchSet->hasFile(filename + ".")) {
// WORKAROUND: Bug #1458388: "SIMON1: Game Detection fails"
// sometimes instead of "GAMEPC" we get "GAMEPC." (note trailing dot)
debug(3, "Opening hashed: %s.", filename.c_str());
_handle = s_searchSet->openFile(filename);
} else {
// Last resort: try the current directory
FilesystemNode file(filename);
if (file.exists() && !file.isDirectory())
_handle = file.openForReading();
}
if (_handle == NULL)
debug(2, "File %s not opened", filename.c_str());
else
_name = filename;
return _handle != NULL;
}
bool File::open(const FilesystemNode &node) {
if (!node.exists()) {
warning("File::open: Trying to open a FilesystemNode which does not exist");
return false;
} else if (node.isDirectory()) {
warning("File::open: Trying to open a FilesystemNode which is a directory");
return false;
}
String filename(node.getName());
if (_handle) {
error("File::open: This file object already is opened (%s), won't open '%s'", _name.c_str(), filename.c_str());
}
clearIOFailed();
_name.clear();
_handle = node.openForReading();
if (_handle == NULL)
debug(2, "File %s not found", filename.c_str());
else
_name = filename;
return _handle != NULL;
}
bool File::exists(const String &filename) {
if (s_searchSet && s_searchSet->hasFile(filename)) {
return true;
} else if (s_searchSet && s_searchSet->hasFile(filename + ".")) {
// WORKAROUND: Bug #1458388: "SIMON1: Game Detection fails"
// sometimes instead of "GAMEPC" we get "GAMEPC." (note trailing dot)
return true;
} else {
// Last resort: try the current directory
FilesystemNode file(filename);
if (file.exists() && !file.isDirectory())
return true;
}
return false;
}
void File::close() {
delete _handle;
_handle = NULL;
}
bool File::isOpen() const {
return _handle != NULL;
}
bool File::ioFailed() const {
// TODO/FIXME: Just use ferror() here?
return !_handle || _handle->ioFailed();
}
void File::clearIOFailed() {
if (_handle)
_handle->clearIOFailed();
}
bool File::eos() const {
assert(_handle);
return _handle->eos();
}
int32 File::pos() const {
assert(_handle);
return _handle->pos();
}
int32 File::size() const {
assert(_handle);
return _handle->size();
}
bool File::seek(int32 offs, int whence) {
assert(_handle);
return _handle->seek(offs, whence);
}
uint32 File::read(void *ptr, uint32 len) {
assert(_handle);
return _handle->read(ptr, len);
}
DumpFile::DumpFile() : _handle(0) {
}
DumpFile::~DumpFile() {
close();
}
bool DumpFile::open(const String &filename) {
assert(!filename.empty());
assert(!_handle);
FilesystemNode node(filename);
return open(node);
}
bool DumpFile::open(const FilesystemNode &node) {
assert(!_handle);
if (node.isDirectory()) {
warning("File::open: Trying to open a FilesystemNode which is a directory");
return false;
}
_handle = node.openForWriting();
if (_handle == NULL)
debug(2, "File %s not found", node.getName().c_str());
return _handle != NULL;
}
void DumpFile::close() {
delete _handle;
_handle = NULL;
}
bool DumpFile::isOpen() const {
return _handle != NULL;
}
bool DumpFile::ioFailed() const {
assert(_handle);
return _handle->ioFailed();
}
void DumpFile::clearIOFailed() {
assert(_handle);
_handle->clearIOFailed();
}
uint32 DumpFile::write(const void *ptr, uint32 len) {
assert(_handle);
return _handle->write(ptr, len);
}
bool DumpFile::flush() {
assert(_handle);
return _handle->flush();
}
} // End of namespace Common