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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-1-1-1/common/file.cpp $
 * $Id: file.cpp 44266 2009-09-23 00:15:00Z lordhoto $
 *
 */

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

namespace Common {

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

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

00043 bool File::open(const String &filename) {
      return open(filename, SearchMan);
}

00047 bool File::open(const String &filename, Archive &archive) {
      assert(!filename.empty());
      assert(!_handle);

      SeekableReadStream *stream = 0;

      if ((stream = archive.createReadStreamForMember(filename))) {
            debug(3, "Opening hashed: %s", filename.c_str());
      } else if ((stream = archive.createReadStreamForMember(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());
      }

      return open(stream, filename);
}

00064 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.createReadStream();
      return open(stream, node.getPath());
}

00079 bool File::open(SeekableReadStream *stream, const Common::String &name) {
      assert(!_handle);

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


00092 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;
}

00104 void File::close() {
      delete _handle;
      _handle = NULL;
}

00109 bool File::isOpen() const {
      return _handle != NULL;
}

00113 bool File::err() const {
      assert(_handle);
      return _handle->err();
}

00118 void File::clearErr() {
      assert(_handle);
      _handle->clearErr();
}

00123 bool File::eos() const {
      assert(_handle);
      return _handle->eos();
}

00128 int32 File::pos() const {
      assert(_handle);
      return _handle->pos();
}

00133 int32 File::size() const {
      assert(_handle);
      return _handle->size();
}

00138 bool File::seek(int32 offs, int whence) {
      assert(_handle);
      return _handle->seek(offs, whence);
}

00143 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.createWriteStream();

      if (_handle == NULL)
            debug(2, "File %s not found", node.getName().c_str());

      return _handle != NULL;
}

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

00185 bool DumpFile::isOpen() const {
      return _handle != NULL;
}

00189 bool DumpFile::err() const {
      assert(_handle);
      return _handle->err();
}

00194 void DumpFile::clearErr() {
      assert(_handle);
      _handle->clearErr();
}

00199 uint32 DumpFile::write(const void *ptr, uint32 len) {
      assert(_handle);
      return _handle->write(ptr, len);
}

00204 bool DumpFile::flush() {
      assert(_handle);
      return _handle->flush();
}

}     // End of namespace Common

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