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237 lines
6.6 KiB
237 lines
6.6 KiB
//C- -------------------------------------------------------------------
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//C- DjVuLibre-3.5
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//C- Copyright (c) 2002 Leon Bottou and Yann Le Cun.
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//C- Copyright (c) 2001 AT&T
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//C-
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//C- This software is subject to, and may be distributed under, the
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//C- GNU General Public License, Version 2. The license should have
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//C- accompanied the software or you may obtain a copy of the license
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//C- from the Free Software Foundation at http://www.fsf.org .
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//C-
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//C- This program is distributed in the hope that it will be useful,
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//C- but WITHOUT ANY WARRANTY; without even the implied warranty of
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//C- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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//C- GNU General Public License for more details.
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//C-
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//C- DjVuLibre-3.5 is derived from the DjVu(r) Reference Library
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//C- distributed by Lizardtech Software. On July 19th 2002, Lizardtech
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//C- Software authorized us to replace the original DjVu(r) Reference
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//C- Library notice by the following text (see doc/lizard2002.djvu):
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//C-
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//C- ------------------------------------------------------------------
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//C- | DjVu (r) Reference Library (v. 3.5)
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//C- | Copyright (c) 1999-2001 LizardTech, Inc. All Rights Reserved.
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//C- | The DjVu Reference Library is protected by U.S. Pat. No.
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//C- | 6,058,214 and patents pending.
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//C- |
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//C- | This software is subject to, and may be distributed under, the
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//C- | GNU General Public License, Version 2. The license should have
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//C- | accompanied the software or you may obtain a copy of the license
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//C- | from the Free Software Foundation at http://www.fsf.org .
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//C- |
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//C- | The computer code originally released by LizardTech under this
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//C- | license and unmodified by other parties is deemed "the LIZARDTECH
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//C- | ORIGINAL CODE." Subject to any third party intellectual property
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//C- | claims, LizardTech grants recipient a worldwide, royalty-free,
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//C- | non-exclusive license to make, use, sell, or otherwise dispose of
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//C- | the LIZARDTECH ORIGINAL CODE or of programs derived from the
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//C- | LIZARDTECH ORIGINAL CODE in compliance with the terms of the GNU
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//C- | General Public License. This grant only confers the right to
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//C- | infringe patent claims underlying the LIZARDTECH ORIGINAL CODE to
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//C- | the extent such infringement is reasonably necessary to enable
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//C- | recipient to make, have made, practice, sell, or otherwise dispose
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//C- | of the LIZARDTECH ORIGINAL CODE (or portions thereof) and not to
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//C- | any greater extent that may be necessary to utilize further
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//C- | modifications or combinations.
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//C- |
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//C- | The LIZARDTECH ORIGINAL CODE is provided "AS IS" WITHOUT WARRANTY
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//C- | OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
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//C- | TO ANY WARRANTY OF NON-INFRINGEMENT, OR ANY IMPLIED WARRANTY OF
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//C- | MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
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//C- +------------------------------------------------------------------
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//
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// $Id: DjVuNavDir.cpp,v 1.8 2003/11/07 22:08:21 leonb Exp $
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// $Name: release_3_5_15 $
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#if NEED_GNUG_PRAGMAS
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# pragma implementation
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#endif
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#include "DjVuNavDir.h"
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#include "debug.h"
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#include "GException.h"
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#include "GOS.h"
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#include "ByteStream.h"
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#include "GURL.h"
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#include <ctype.h>
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#ifdef HAVE_NAMESPACES
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namespace DJVU {
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# ifdef NOT_DEFINED // Just to fool emacs c++ mode
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}
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#endif
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#endif
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DjVuNavDir::DjVuNavDir(const GURL &dirURL)
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{
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if (!dirURL) G_THROW( ERR_MSG("DjVuNavDir.zero_dir") );
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baseURL=dirURL.base();
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}
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DjVuNavDir::DjVuNavDir(ByteStream & str, const GURL &dirURL)
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{
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if (!dirURL) G_THROW( ERR_MSG("DjVuNavDir.zero_dir") );
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baseURL=GURL(dirURL).base();
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decode(str);
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}
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void
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DjVuNavDir::decode(ByteStream & str)
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{
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GCriticalSectionLock lk(&lock);
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GList<GUTF8String> tmp_page2name;
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int eof=0;
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while(!eof)
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{
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char buffer[1024];
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char * ptr;
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for(ptr=buffer;ptr-buffer<1024;ptr++)
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if ((eof=!str.read(ptr, 1)) || *ptr=='\n') break;
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if (ptr-buffer==1024) G_THROW( ERR_MSG("DjVuNavDir.long_line") );
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*ptr=0;
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if (!strlen(buffer)) continue;
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if (!tmp_page2name.contains(buffer))
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tmp_page2name.append(buffer);
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};
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// Now copying lists to arrays for faster access later
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int pages=tmp_page2name.size();
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page2name.resize(pages-1);
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int cnt;
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GPosition pos;
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for(pos=tmp_page2name, cnt=0;pos;++pos, cnt++)
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page2name[cnt]=tmp_page2name[pos];
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// Now creating reverse mapping (strings => numbers)
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for(cnt=0;cnt<pages;cnt++)
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{
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name2page[page2name[cnt]]=cnt;
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url2page[GURL::UTF8(page2name[cnt],baseURL)]=cnt;
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}
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}
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#ifndef NEED_DECODER_ONLY
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void
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DjVuNavDir::encode(ByteStream & str)
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{
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GCriticalSectionLock lk(&lock);
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for(int i=0;i<page2name.size();i++)
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{
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GUTF8String & name=page2name[i];
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str.writall((const char*)name, name.length());
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str.writall("\n", 1);
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};
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}
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#endif //NEED_DECODER_ONLY
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int
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DjVuNavDir::get_pages_num(void) const
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{
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GCriticalSectionLock lk((GCriticalSection *)&lock);
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return page2name.size();
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}
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int
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DjVuNavDir::name_to_page(const char * name) const
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{
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GCriticalSectionLock lk((GCriticalSection *)&lock);
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if (!name2page.contains(name)) return -1;
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return name2page[name];
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}
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int
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DjVuNavDir::url_to_page(const GURL & url) const
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{
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GCriticalSectionLock lk((GCriticalSection *)&lock);
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if (!url2page.contains(url)) return -1;
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return url2page[url];
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}
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GUTF8String
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DjVuNavDir::page_to_name(int page) const
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{
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GCriticalSectionLock lk((GCriticalSection *)&lock);
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if (page<0)
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G_THROW( ERR_MSG("DjVuNavDir.neg_page") );
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if (page>=page2name.size())
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G_THROW( ERR_MSG("DjVuNavDir.large_page") );
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return page2name[page];
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}
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GURL
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DjVuNavDir::page_to_url(int page) const
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{
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GCriticalSectionLock lk((GCriticalSection *)&lock);
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return GURL::UTF8(page_to_name(page),baseURL);
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}
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void
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DjVuNavDir::insert_page(int where, const char * name)
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{
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GCriticalSectionLock lk((GCriticalSection *)&lock);
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int pages=page2name.size();
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if (where<0) where=pages;
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page2name.resize(pages);
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for(int i=pages;i>where;i--)
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page2name[i]=page2name[i-1];
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page2name[where]=name;
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name2page[name]=where;
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url2page[GURL::UTF8(name,baseURL)]=where;
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}
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#ifndef NEED_DECODER_ONLY
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void
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DjVuNavDir::delete_page(int page_num)
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{
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GCriticalSectionLock lk((GCriticalSection *)&lock);
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int pages=page2name.size();
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if (page_num<0 || page_num>=pages)
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G_THROW( ERR_MSG("DjVuNavDir.bad_page") );
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for(int i=page_num;i<pages-1;i++)
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page2name[i]=page2name[i+1];
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page2name.resize(--pages-1);
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}
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#endif
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#ifdef HAVE_NAMESPACES
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}
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# ifndef NOT_USING_DJVU_NAMESPACE
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using namespace DJVU;
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# endif
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#endif
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