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+//C- -*- C++ -*-
+//C- -------------------------------------------------------------------
+//C- DjVuLibre-3.5
+//C- Copyright (c) 2002 Leon Bottou and Yann Le Cun.
+//C- Copyright (c) 2001 AT&T
+//C-
+//C- This software is subject to, and may be distributed under, the
+//C- GNU General Public License, Version 2. The license should have
+//C- accompanied the software or you may obtain a copy of the license
+//C- from the Free Software Foundation at http://www.fsf.org .
+//C-
+//C- This program is distributed in the hope that it will be useful,
+//C- but WITHOUT ANY WARRANTY; without even the implied warranty of
+//C- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+//C- GNU General Public License for more details.
+//C-
+//C- DjVuLibre-3.5 is derived from the DjVu(r) Reference Library
+//C- distributed by Lizardtech Software. On July 19th 2002, Lizardtech
+//C- Software authorized us to replace the original DjVu(r) Reference
+//C- Library notice by the following text (see doc/lizard2002.djvu):
+//C-
+//C- ------------------------------------------------------------------
+//C- | DjVu (r) Reference Library (v. 3.5)
+//C- | Copyright (c) 1999-2001 LizardTech, Inc. All Rights Reserved.
+//C- | The DjVu Reference Library is protected by U.S. Pat. No.
+//C- | 6,058,214 and patents pending.
+//C- |
+//C- | This software is subject to, and may be distributed under, the
+//C- | GNU General Public License, Version 2. The license should have
+//C- | accompanied the software or you may obtain a copy of the license
+//C- | from the Free Software Foundation at http://www.fsf.org .
+//C- |
+//C- | The computer code originally released by LizardTech under this
+//C- | license and unmodified by other parties is deemed "the LIZARDTECH
+//C- | ORIGINAL CODE." Subject to any third party intellectual property
+//C- | claims, LizardTech grants recipient a worldwide, royalty-free,
+//C- | non-exclusive license to make, use, sell, or otherwise dispose of
+//C- | the LIZARDTECH ORIGINAL CODE or of programs derived from the
+//C- | LIZARDTECH ORIGINAL CODE in compliance with the terms of the GNU
+//C- | General Public License. This grant only confers the right to
+//C- | infringe patent claims underlying the LIZARDTECH ORIGINAL CODE to
+//C- | the extent such infringement is reasonably necessary to enable
+//C- | recipient to make, have made, practice, sell, or otherwise dispose
+//C- | of the LIZARDTECH ORIGINAL CODE (or portions thereof) and not to
+//C- | any greater extent that may be necessary to utilize further
+//C- | modifications or combinations.
+//C- |
+//C- | The LIZARDTECH ORIGINAL CODE is provided "AS IS" WITHOUT WARRANTY
+//C- | OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
+//C- | TO ANY WARRANTY OF NON-INFRINGEMENT, OR ANY IMPLIED WARRANTY OF
+//C- | MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
+//C- +------------------------------------------------------------------
+//
+// $Id: GURL.h,v 1.9 2003/11/07 22:08:21 leonb Exp $
+// $Name: release_3_5_15 $
+
+#ifndef _GURL_H_
+#define _GURL_H_
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+#if NEED_GNUG_PRAGMAS
+# pragma interface
+#endif
+
+
+#include "GString.h"
+#include "Arrays.h"
+#include "GThreads.h"
+
+
+#ifdef HAVE_NAMESPACES
+namespace DJVU {
+# ifdef NOT_DEFINED // Just to fool emacs c++ mode
+}
+#endif
+#endif
+
+/** @name GURL.h
+ Files #"GURL.h"# and #"GURL.cpp"# contain the implementation of the
+ \Ref{GURL} class used to store URLs in a system independent format.
+ @memo System independent URL representation.
+ @author Andrei Erofeev <eaf@geocities.com>
+
+// From: Leon Bottou, 1/31/2002
+// This has been heavily changed by Lizardtech.
+// They decided to use URLs for everyting, including
+// the most basic file access. The URL class now is a unholy
+// mixture of code for syntactically parsing the urls (which is was)
+// and file status code (only for local file: urls).
+
+ @version #$Id: GURL.h,v 1.9 2003/11/07 22:08:21 leonb Exp $#
+*/
+
+//@{
+
+/** System independent URL representation.
+
+ This class is used in the library to store URLs in a system independent
+ format. The idea to use a general class to hold URL arose after we
+ realized, that DjVu had to be able to access files both from the WEB
+ and from the local disk. While it is strange to talk about system
+ independence of HTTP URLs, file names formats obviously differ from
+ platform to platform. They may contain forward slashes, backward slashes,
+ colons as separators, etc. There maybe more than one URL corresponding
+ to the same file name. Compare #file:/dir/file.djvu# and
+ #file://localhost/dir/file.djvu#.
+
+ To simplify a developer's life we have created this class, which contains
+ inside a canonical representation of URLs.
+
+ File URLs are converted to internal format with the help of \Ref{GOS} class.
+
+ All other URLs are modified to contain only forward slashes.
+*/
+
+class GURL
+{
+public:
+ class Filename;
+ class UTF8;
+ class Native;
+protected:
+ /** @name Constructors
+ Accept the string URL, check that it starts from #file:/#
+ or #http:/# and convert to internal system independent
+ representation.
+ */
+ //@{
+ ///
+ GURL(const char * url_string);
+ //@}
+
+public:
+ GURL(void);
+
+ GURL(const GUTF8String & url_string);
+
+ GURL(const GNativeString & url_string);
+
+ GURL(const GUTF8String &xurl, const GURL &codebase);
+
+ GURL(const GNativeString &xurl, const GURL &codebase);
+
+ /// Copy constructor
+ GURL(const GURL & gurl);
+
+ /// The destructor
+ virtual ~GURL(void) {}
+
+private:
+ // The 'class_lock' should be locked whenever you're accessing
+ // url, or cgi_name_arr, or cgi_value_arr.
+ GCriticalSection class_lock;
+protected:
+ GUTF8String url;
+ DArray<GUTF8String> cgi_name_arr, cgi_value_arr;
+ bool validurl;
+
+ void init(const bool nothrow=false);
+ void convert_slashes(void);
+ void beautify_path(void);
+ static GUTF8String beautify_path(GUTF8String url);
+
+ static GUTF8String protocol(const GUTF8String& url);
+ void parse_cgi_args(void);
+ void store_cgi_args(void);
+public:
+ /// Test if the URL is valid. If invalid, reinitialize.
+ bool is_valid(void) const; // const lies to the compiler because of dependency problems
+
+ /// Extracts the {\em protocol} part from the URL and returns it
+ GUTF8String protocol(void) const;
+
+ /** Returns string after the first '\#' with decoded
+ escape sequences. */
+ GUTF8String hash_argument(void) const;
+
+ /** Inserts the #arg# after a separating hash into the URL.
+ The function encodes any illegal character in #arg# using
+ \Ref{GOS::encode_reserved}(). */
+ void set_hash_argument(const GUTF8String &arg);
+
+ /** Returns the total number of CGI arguments in the URL.
+ CGI arguments follow '#?#' sign and are separated by '#&#' signs */
+ int cgi_arguments(void) const;
+
+ /** Returns the total number of DjVu-related CGI arguments (arguments
+ following #DJVUOPTS# in the URL). */
+ int djvu_cgi_arguments(void) const;
+
+ /** Returns that part of CGI argument number #num#, which is
+ before the equal sign. */
+ GUTF8String cgi_name(int num) const;
+
+ /** Returns that part of DjVu-related CGI argument number #num#,
+ which is before the equal sign. */
+ GUTF8String djvu_cgi_name(int num) const;
+
+ /** Returns that part of CGI argument number #num#, which is
+ after the equal sign. */
+ GUTF8String cgi_value(int num) const;
+
+ /** Returns that part of DjVu-related CGI argument number #num#,
+ which is after the equal sign. */
+ GUTF8String djvu_cgi_value(int num) const;
+
+ /** Returns array of all known CGI names (part of CGI argument before
+ the equal sign) */
+ DArray<GUTF8String>cgi_names(void) const;
+
+ /** Returns array of names of DjVu-related CGI arguments (arguments
+ following #DJVUOPTS# option. */
+ DArray<GUTF8String>djvu_cgi_names(void) const;
+
+ /** Returns array of all known CGI names (part of CGI argument before
+ the equal sign) */
+ DArray<GUTF8String>cgi_values(void) const;
+
+ /** Returns array of values of DjVu-related CGI arguments (arguments
+ following #DJVUOPTS# option. */
+ DArray<GUTF8String>djvu_cgi_values(void) const;
+
+ /// Erases everything after the first '\#' or '?'
+ void clear_all_arguments(void);
+
+ /// Erases everything after the first '\#'
+ void clear_hash_argument(void);
+
+ /// Erases DjVu CGI arguments (following "#DJVUOPTS#")
+ void clear_djvu_cgi_arguments(void);
+
+ /// Erases all CGI arguments (following the first '?')
+ void clear_cgi_arguments(void);
+
+ /** Appends the specified CGI argument. Will insert "#DJVUOPTS#" if
+ necessary */
+ void add_djvu_cgi_argument(const GUTF8String &name, const char * value=0);
+
+ /** Returns the URL corresponding to the directory containing
+ the document with this URL. The function basically takes the
+ URL and clears everything after the last slash. */
+ GURL base(void) const;
+
+ /// Returns the aboslute URL without the host part.
+ GUTF8String pathname(void) const;
+
+ /** Returns the name part of this URL.
+ For example, if the URL is #http://www.lizardtech.com/file%201.djvu# then
+ this function will return #file%201.djvu#. \Ref{fname}() will
+ return #file 1.djvu# at the same time. */
+ GUTF8String name(void) const;
+
+ /** Returns the name part of this URL with escape sequences expanded.
+ For example, if the URL is #http://www.lizardtech.com/file%201.djvu# then
+ this function will return #file 1.djvu#. \Ref{name}() will
+ return #file%201.djvu# at the same time. */
+ GUTF8String fname(void) const;
+
+ /// Returns the extention part of name of document in this URL.
+ GUTF8String extension(void) const;
+
+ /// Checks if this is an empty URL
+ bool is_empty(void) const;
+
+ /// Checks if the URL is local (starts from #file:/#) or not
+ bool is_local_file_url(void) const;
+
+ /** @name Concatenation operators
+ Concatenate the GURL with the passed {\em name}. If the {\em name}
+ is absolute (has non empty protocol prefix), we just return
+ #GURL(name)#. Otherwise the #name# is appended to the GURL after a
+ separating slash.
+ */
+ //@{
+ ///
+// GURL operator+(const GUTF8String &name) const;
+ //@}
+
+ /// Returns TRUE if #gurl1# and #gurl2# are the same
+ bool operator==(const GURL & gurl2) const;
+
+ /// Returns TRUE if #gurl1# and #gurl2# are different
+ bool operator!=(const GURL & gurl2) const;
+
+ /// Assignment operator
+ GURL & operator=(const GURL & url);
+
+ /// Returns Internal URL representation
+ operator const char*(void) const { return url; };
+
+ /** Returns a string representing the URL. This function normally
+ returns a standard file URL as described in RFC 1738.
+ Some versions of MSIE do not support this standard syntax.
+ A brain damaged MSIE compatible syntax is generated
+ when the optional argument #useragent# contains string #"MSIE"# or
+ #"Microsoft"#. */
+ GUTF8String get_string(const GUTF8String &useragent) const;
+
+ GUTF8String get_string(const bool nothrow=false) const;
+
+ /// Escape special characters
+ static GUTF8String encode_reserved(const GUTF8String &gs);
+
+ /** Decodes reserved characters from the URL.
+ See also: \Ref{encode_reserved}(). */
+ static GUTF8String decode_reserved(const GUTF8String &url);
+
+ /// Test if this url is an existing file, directory, or device.
+ bool is_local_path(void) const;
+
+ /// Test if this url is an existing file.
+ bool is_file(void) const;
+
+ /// Test if this url is an existing directory.
+ bool is_dir(void) const;
+
+ /// Follows symbolic links.
+ GURL follow_symlinks(void) const;
+
+ /// Creates the specified directory.
+ int mkdir(void) const;
+
+ /** Deletes file or directory.
+ Directories are not deleted unless the directory is empty.
+ Returns a negative number if an error occurs. */
+ int deletefile(void) const;
+
+ /** Recursively erases contents of directory. The directory
+ itself will not be removed. */
+ int cleardir(const int timeout=0) const;
+
+ /// Rename a file or directory.
+ int renameto(const GURL &newurl) const;
+
+ /// List the contents of a directory.
+ GList<GURL> listdir(void) const;
+
+ /** Returns a filename for a URL. Argument #url# must be a legal file URL.
+ This function applies heuristic rules to convert the URL into a valid
+ file name. It is guaranteed that this function can properly parse all
+ URLs generated by #filename_to_url#. The heuristics also work better when
+ the file actually exists. The empty string is returned when this
+ function cannot parse the URL or when the URL is not a file URL.
+ URL formats are as described in RFC 1738 plus the following alternative
+ formats for files on the local host:
+
+ file://<letter>:/<path>
+ file://<letter>|/<path>
+ file:/<path>
+
+ which are accepted because various browsers recognize them.*/
+ GUTF8String UTF8Filename(void) const;
+ /// Same but returns a native string.
+ GNativeString NativeFilename(void) const;
+
+ /** Hashing function.
+ @return hash suitable for usage in \Ref{GMap} */
+ friend unsigned int hash(const GURL & gurl);
+
+ /** Returns fully qualified file names. This functions constructs the fully
+ qualified name of file or directory #filename#. When provided, the
+ optional argument #fromdirname# is used as the current directory when
+ interpreting relative specifications in #filename#. Function
+ #expand_name# is very useful for logically concatenating file names. It
+ knows which separators should be used for each operating system and it
+ knows which syntactical rules apply. */
+ static GUTF8String expand_name(const GUTF8String &filename, const char *fromdirname=0);
+};
+
+class GURL::UTF8 : public GURL
+{
+public:
+ UTF8(const GUTF8String &xurl);
+ UTF8(const GUTF8String &xurl, const GURL &codebase);
+};
+
+class GURL::Native : public GURL
+{
+public:
+ Native(const GNativeString &xurl);
+ Native(const GNativeString &xurl, const GURL &codebase);
+};
+
+class GURL::Filename : public GURL
+{
+public:
+ Filename(const GUTF8String &filename);
+ Filename(const GNativeString &filename);
+ class UTF8;
+ class Native;
+};
+
+class GURL::Filename::UTF8 : public GURL::Filename
+{
+public:
+ UTF8(const GUTF8String &filename);
+};
+
+class GURL::Filename::Native : public GURL::Filename
+{
+public:
+ Native(const GNativeString &filename);
+};
+
+
+inline bool
+GURL::operator!=(const GURL & gurl2) const
+{
+ return !(*this == gurl2);
+}
+
+inline GUTF8String
+GURL::protocol(void) const
+{
+ return protocol(get_string());
+}
+
+inline bool
+GURL::is_empty(void) const
+{
+ return !url.length()||!get_string().length();
+}
+
+// Test if the URL is valid.
+// If invalid, reinitialize and return the result.
+inline bool
+GURL::is_valid(void) const
+{
+ if(!validurl)
+ const_cast<GURL *>(this)->init(true);
+ return validurl;
+}
+
+
+
+//@}
+
+
+#ifdef HAVE_NAMESPACES
+}
+# ifndef NOT_USING_DJVU_NAMESPACE
+using namespace DJVU;
+# endif
+#endif
+#endif