208 lines
7.2 KiB
C++
208 lines
7.2 KiB
C++
// Filename: virtualFileMountSystem.cxx
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// Created by: drose (03Aug02)
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//
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////////////////////////////////////////////////////////////////////
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//
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// PANDA 3D SOFTWARE
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// Copyright (c) Carnegie Mellon University. All rights reserved.
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//
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// All use of this software is subject to the terms of the revised BSD
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// license. You should have received a copy of this license along
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// with this source code in a file named "LICENSE."
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//
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////////////////////////////////////////////////////////////////////
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#include "virtualFileMountSystem.h"
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TypeHandle VirtualFileMountSystem::_type_handle;
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////////////////////////////////////////////////////////////////////
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// Function: VirtualFileMountSystem::has_file
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// Access: Public, Virtual
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// Description: Returns true if the indicated file exists within the
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// mount system.
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////////////////////////////////////////////////////////////////////
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bool VirtualFileMountSystem::
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has_file(const Filename &file) const {
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Filename pathname(_physical_filename, file);
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#ifdef WIN32
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if (vfs_case_sensitive) {
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Filename case_pathname = pathname;
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if (!case_pathname.make_true_case()) {
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return false;
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}
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if (case_pathname != pathname) {
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express_cat.warning()
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<< "Filename is incorrect case: " << pathname
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<< " instead of " << case_pathname << "\n";
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return false;
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}
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}
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#endif // WIN32
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return pathname.exists();
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}
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////////////////////////////////////////////////////////////////////
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// Function: VirtualFileMountSystem::is_directory
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// Access: Public, Virtual
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// Description: Returns true if the indicated file exists within the
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// mount system and is a directory.
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////////////////////////////////////////////////////////////////////
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bool VirtualFileMountSystem::
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is_directory(const Filename &file) const {
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#ifdef WIN32
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// First ensure that the file exists to validate its case.
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if (vfs_case_sensitive) {
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if (!has_file(file)) {
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return false;
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}
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}
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#endif // WIN32
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Filename pathname(_physical_filename, file);
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return pathname.is_directory();
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}
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////////////////////////////////////////////////////////////////////
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// Function: VirtualFileMountSystem::is_regular_file
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// Access: Public, Virtual
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// Description: Returns true if the indicated file exists within the
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// mount system and is a regular file.
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////////////////////////////////////////////////////////////////////
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bool VirtualFileMountSystem::
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is_regular_file(const Filename &file) const {
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#ifdef WIN32
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// First ensure that the file exists to validate its case.
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if (vfs_case_sensitive) {
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if (!has_file(file)) {
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return false;
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}
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}
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#endif // WIN32
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Filename pathname(_physical_filename, file);
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return pathname.is_regular_file();
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}
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////////////////////////////////////////////////////////////////////
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// Function: VirtualFileMountSystem::open_read_file
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// Access: Public, Virtual
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// Description: Opens the file for reading, if it exists. Returns a
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// newly allocated istream on success (which you should
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// eventually delete when you are done reading).
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// Returns NULL on failure.
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////////////////////////////////////////////////////////////////////
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istream *VirtualFileMountSystem::
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open_read_file(const Filename &file) const {
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#ifdef WIN32
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// First ensure that the file exists to validate its case.
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if (vfs_case_sensitive) {
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if (!has_file(file)) {
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return NULL;
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}
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}
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#endif // WIN32
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Filename pathname(_physical_filename, file);
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if (file.is_text()) {
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pathname.set_text();
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} else {
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pathname.set_binary();
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}
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pifstream *stream = new pifstream;
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if (!pathname.open_read(*stream)) {
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// Couldn't open the file for some reason.
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close_read_file(stream);
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return NULL;
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}
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return stream;
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}
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////////////////////////////////////////////////////////////////////
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// Function: VirtualFileMountSystem::get_file_size
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// Access: Published, Virtual
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// Description: Returns the current size on disk (or wherever it is)
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// of the already-open file. Pass in the stream that
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// was returned by open_read_file(); some
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// implementations may require this stream to determine
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// the size.
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////////////////////////////////////////////////////////////////////
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off_t VirtualFileMountSystem::
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get_file_size(const Filename &, istream *stream) const {
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// First, save the original stream position.
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streampos orig = stream->tellg();
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// Seek to the end and get the stream position there.
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stream->seekg(0, ios::end);
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streampos size = stream->tellg();
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// Then return to the original point.
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stream->seekg(orig, ios::beg);
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return size;
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}
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////////////////////////////////////////////////////////////////////
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// Function: VirtualFileMountSystem::get_file_size
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// Access: Published, Virtual
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// Description: Returns the current size on disk (or wherever it is)
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// of the file before it has been opened.
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////////////////////////////////////////////////////////////////////
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off_t VirtualFileMountSystem::
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get_file_size(const Filename &file) const {
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Filename pathname(_physical_filename, file);
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return pathname.get_file_size();
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}
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////////////////////////////////////////////////////////////////////
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// Function: VirtualFileMountSystem::get_timestamp
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// Access: Published, Virtual
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// Description: Returns a time_t value that represents the time the
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// file was last modified, to within whatever precision
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// the operating system records this information (on a
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// Windows95 system, for instance, this may only be
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// accurate to within 2 seconds).
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//
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// If the timestamp cannot be determined, either because
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// it is not supported by the operating system or
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// because there is some error (such as file not found),
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// returns 0.
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////////////////////////////////////////////////////////////////////
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time_t VirtualFileMountSystem::
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get_timestamp(const Filename &file) const {
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Filename pathname(_physical_filename, file);
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return pathname.get_timestamp();
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}
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////////////////////////////////////////////////////////////////////
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// Function: VirtualFileMountSystem::scan_directory
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// Access: Public, Virtual
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// Description: Fills the given vector up with the list of filenames
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// that are local to this directory, if the filename is
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// a directory. Returns true if successful, or false if
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// the file is not a directory or cannot be read.
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////////////////////////////////////////////////////////////////////
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bool VirtualFileMountSystem::
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scan_directory(vector_string &contents, const Filename &dir) const {
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#ifdef WIN32
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// First ensure that the file exists to validate its case.
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if (vfs_case_sensitive) {
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if (!has_file(dir)) {
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return false;
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}
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}
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#endif // WIN32
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Filename pathname(_physical_filename, dir);
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return pathname.scan_directory(contents);
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}
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////////////////////////////////////////////////////////////////////
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// Function: VirtualFileMountSystem::output
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// Access: Public, Virtual
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// Description:
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////////////////////////////////////////////////////////////////////
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void VirtualFileMountSystem::
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output(ostream &out) const {
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out << get_physical_filename();
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}
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