pandaIOSystem.cxx

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/**
 * PANDA 3D SOFTWARE
 * Copyright (c) Carnegie Mellon University.  All rights reserved.
 *
 * All use of this software is subject to the terms of the revised BSD
 * license.  You should have received a copy of this license along
 * with this source code in a file named "LICENSE."
 *
 * @file pandaIOSystem.cxx
 * @author rdb
 * @date 2011-03-29
 */

#include "pandaIOSystem.h"
#include "pandaIOStream.h"

/**
 * Initializes the object with the given VFS, or the global one if none was
 * specified.
 */
PandaIOSystem::
PandaIOSystem(VirtualFileSystem *vfs) : _vfs(vfs) {
}

/**
 * Returns true if the file exists, duh.
 */
bool PandaIOSystem::
Exists(const char *file) const {
  Filename fn = Filename::from_os_specific(file);
  return _vfs->exists(fn);
}

/**
 * Closes the indicated file stream.
 */
void PandaIOSystem::
Close(Assimp::IOStream *file) {
  PandaIOStream *pstr = (PandaIOStream*) file;
  _vfs->close_read_file(&pstr->_istream);
}

/**
 * Returns true if the two paths point to the same file, false if not.
 */
bool PandaIOSystem::
ComparePaths(const char *p1, const char *p2) const {
  Filename fn1 = Filename::from_os_specific(p1);
  Filename fn2 = Filename::from_os_specific(p2);
  fn1.make_canonical();
  fn2.make_canonical();
  return fn1 == fn2;
}

/**
 * Returns the path separator for this operating system.
 */
char PandaIOSystem::
getOsSeparator() const {
#ifdef _WIN32
  return '\\';
#else
  return '/';
#endif
}

/**
 * Opens the indicated file.
 */
Assimp::IOStream *PandaIOSystem::
Open(const char *file, const char *mode) {
  Filename fn = Filename::from_os_specific(file);

  if (mode[0] == 'r') {
    std::istream *stream = _vfs->open_read_file(file, true);
    if (stream == nullptr) {
      return nullptr;
    }
    return new PandaIOStream(*stream);

  } else {
    nassert_raise("write mode not implemented");
    return nullptr;
  }
}