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file.cpp

/* 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: https://scummvm.svn.sourceforge.net/svnroot/scummvm/scummvm/tags/release-0-13-1/common/file.cpp $
 * $Id: file.cpp 35481 2008-12-22 11:22:15Z jvprat $
 *
 */

#include "common/archive.h"
#include "common/file.h"
#include "common/fs.h"
#include "common/util.h"
#include "common/system.h"

namespace Common {

void File::addDefaultDirectory(const String &directory) {
      FSNode dir(directory);
      addDefaultDirectory(dir);
}

void File::addDefaultDirectory(const FSNode &dir) {
      if (dir.exists() && dir.isDirectory())
            SearchMan.addDirectory(dir.getPath(), dir);
}

File::File()
      : _handle(0) {
}

File::~File() {
      close();
}

00052 bool File::open(const String &filename) {
      return open(filename, SearchMan);
}

00056 bool File::open(const String &filename, Archive &archive) {
      assert(!filename.empty());
      assert(!_handle);

      clearIOFailed();

      SeekableReadStream *stream = 0;
      if (archive.hasFile(filename)) {
            debug(3, "Opening hashed: %s", filename.c_str());
            stream = archive.openFile(filename);
      } else if (archive.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());
            stream = archive.openFile(filename + ".");
      }

      return open(stream, filename);
}

00076 bool File::open(const FSNode &node) {
      assert(!_handle);

      if (!node.exists()) {
            warning("File::open: '%s' does not exist", node.getPath().c_str());
            return false;
      } else if (node.isDirectory()) {
            warning("File::open: '%s' is a directory", node.getPath().c_str());
            return false;
      }

      SeekableReadStream *stream = node.openForReading();
      return open(stream, node.getPath());
}

00091 bool File::open(SeekableReadStream *stream, const Common::String &name) {
      assert(!_handle);
      clearIOFailed();

      if (stream) {
            _handle = stream;
            _name = name;
      } else {
            debug(2, "File::open: opening '%s' failed", name.c_str());
      }
      return _handle != NULL;
}


00105 bool File::exists(const String &filename) {
      if (SearchMan.hasFile(filename)) {
            return true;
      } else if (SearchMan.hasFile(filename + ".")) {
            // WORKAROUND: Bug #1458388: "SIMON1: Game Detection fails"
            // sometimes instead of "GAMEPC" we get "GAMEPC." (note trailing dot)
            return true;
      }

      return false;
}

00117 void File::close() {
      delete _handle;
      _handle = NULL;
}

00122 bool File::isOpen() const {
      return _handle != NULL;
}

00126 bool File::ioFailed() const {
      // TODO/FIXME: Just use ferror() here?
      return !_handle || _handle->ioFailed();
}

00131 void File::clearIOFailed() {
      if (_handle)
            _handle->clearIOFailed();
}

00136 bool File::err() const {
      assert(_handle);
      return _handle->err();
}

00141 void File::clearErr() {
      assert(_handle);
      _handle->clearErr();
}

00146 bool File::eos() const {
      assert(_handle);
      return _handle->eos();
}

00151 int32 File::pos() const {
      assert(_handle);
      return _handle->pos();
}

00156 int32 File::size() const {
      assert(_handle);
      return _handle->size();
}

00161 bool File::seek(int32 offs, int whence) {
      assert(_handle);
      return _handle->seek(offs, whence);
}

00166 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);

      FSNode node(filename);
      return open(node);
}

bool DumpFile::open(const FSNode &node) {
      assert(!_handle);

      if (node.isDirectory()) {
            warning("DumpFile::open: FSNode 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;
}

00208 bool DumpFile::isOpen() const {
      return _handle != NULL;
}

00212 bool DumpFile::err() const {
      assert(_handle);
      return _handle->ioFailed();
}

00217 void DumpFile::clearErr() {
      assert(_handle);
      _handle->clearIOFailed();
}

00222 uint32 DumpFile::write(const void *ptr, uint32 len) {
      assert(_handle);
      return _handle->write(ptr, len);
}

00227 bool DumpFile::flush() {
      assert(_handle);
      return _handle->flush();
}

}     // End of namespace Common

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