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tdegraphics/kviewshell/plugins/djvu/libdjvu/XMLTags.cpp

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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: XMLTags.cpp,v 1.12 2003/11/07 22:08:22 leonb Exp $
// $Name: release_3_5_15 $
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#if NEED_GNUG_PRAGMAS
# pragma implementation
#endif
// From: Leon Bottou, 1/31/2002
// This is purely Lizardtech stuff.
#include "XMLTags.h"
#include "UnicodeByteStream.h"
#include <ctype.h>
#if HAS_WCTYPE
#include <wctype.h>
#endif
#ifdef HAVE_NAMESPACES
namespace DJVU {
# ifdef NOT_DEFINED // Just to fool emacs c++ mode
}
#endif
#endif
lt_XMLContents::lt_XMLContents(void) {}
lt_XMLContents::lt_XMLContents(GP<lt_XMLTags> t)
{
tag=t;
}
static GUTF8String
getargn(char const tag[], char const *&t)
{
char const *s;
for(s=tag;isspace(*s);s++);
for(t=s;(*t)&&((*t)!='/')&&((*t)!='>')&&((*t)!='=')&&!isspace(*t);++t);
return GUTF8String(s,t-s);
}
static GUTF8String
getargv(char const tag[], char const *&t)
{
GUTF8String retval;
if(tag && tag[0] == '=')
{
char const *s=t=tag+1;
if((*t == '"')||(*t == '\47'))
{
char const q=*(t++);
for(s++;(*t)&&((*t)!=q)&&((*t)!='>');++t);
retval=GUTF8String(s,t-s);
if (t[0] == q)
{
++t;
}
}else
{
for(t=s;(*t)&&((*t)!='/')&&((*t)!='>')&&!isspace(*t);++t);
retval=GUTF8String(s,t-s);
}
}else
{
t=tag;
}
return retval;
}
static GUTF8String
tagtoname(char const tag[],char const *&t)
{
char const *s;
for(s=tag;isspace(*s);s++);
for(t=s;(*t)&&((*t)!='>')&&((*t)!='/')&&!isspace(*t);++t);
return GUTF8String(s,t-s);
}
static inline GUTF8String
tagtoname(char const tag[])
{
char const *t;
return tagtoname(tag,t);
}
static inline bool
isspaces(const GUTF8String &raw)
{
return (raw.nextNonSpace() == (int)raw.length());
}
void
lt_XMLTags::ParseValues(char const *t, GMap<GUTF8String,GUTF8String> &args,bool downcase)
{
GUTF8String argn;
char const *tt;
while((argn=getargn(t,tt)).length())
{
if(downcase)
argn=argn.downcase();
args[argn]=getargv(tt,t).fromEscaped();
}
}
lt_XMLTags::~lt_XMLTags() {}
lt_XMLTags::lt_XMLTags(void) : startline(0) {}
lt_XMLTags::lt_XMLTags(const char n[]) : startline(0)
{
char const *t;
name=tagtoname(n,t);
ParseValues(t,args);
}
void
lt_XMLTags::init(const GP<ByteStream> &bs)
{
GP<XMLByteStream> gxmlbs=XMLByteStream::create(bs);
init(*gxmlbs);
}
void
lt_XMLTags::init(const GURL &url)
{
const GP<ByteStream> bs=ByteStream::create(url,"rb");
init(bs);
}
void
lt_XMLTags::init(XMLByteStream &xmlbs)
{
if(!get_count())
{
G_THROW( ERR_MSG("XMLTags.no_GP") );
}
GPList<lt_XMLTags> level;
GUTF8String tag,raw(xmlbs.gets(0,'<',false));
int linesread=xmlbs.get_lines_read();
if(!isspaces(raw))
{
G_THROW( (ERR_MSG("XMLTags.raw_string") "\t")+raw);
}
GUTF8String encoding;
for(int len;(len=(tag=xmlbs.gets(0,'>',true)).length());)
{
if(tag[len-1] != '>')
{
G_THROW((ERR_MSG("XMLTags.bad_tag") "\t")+tag);
}
switch(tag[1])
{
case '?':
{
while(len < 4 || tag.substr(len-2,len) != "?>")
{
GUTF8String cont(xmlbs.gets(0,'>',true));
if(!cont.length())
{
G_THROW( (ERR_MSG("XMLTags.bad_PI") "\t")+tag);
}
len=((tag+=cont).length());
}
char const *n;
GUTF8String xtag = tag.substr(2,-1);
GUTF8String xname = tagtoname(xtag,n);
if(xname.downcase() == "xml")
{
ParseValues(n,args);
for(GPosition pos=args;pos;++pos)
{
if(args.key(pos) == "encoding")
{
const GUTF8String e=args[pos].upcase();
if(e != encoding)
{
xmlbs.set_encoding((encoding=e));
}
}
}
}
break;
}
case '!':
{
if(tag[2] == '-' && tag[3] == '-')
{
while((len < 7) ||
(tag.substr(len-3,-1) != "-->"))
{
GUTF8String cont(xmlbs.gets(0,'>',true));
if(!cont.length())
{
GUTF8String mesg;
mesg.format( ERR_MSG("XMLTags.bad_comment") "\t%s",(const char *)tag);
G_THROW(mesg);
}
len=((tag+=cont).length());
}
}
break;
}
case '/':
{
GUTF8String xname=tagtoname(tag.substr(2,-1));
GPosition last=level.lastpos();
if(last)
{
if(level[last]->name != xname)
{
G_THROW( (ERR_MSG("XMLTags.unmatched_end") "\t")
+level[last]->name+("\t"+GUTF8String(level[last]->get_Line()))
+("\t"+xname)+("\t"+GUTF8String(linesread+1)));
}
level.del(last);
}else
{
G_THROW( ERR_MSG("XMLTags.bad_form") );
}
break;
}
default:
{
GPosition last=level.lastpos();
GP<lt_XMLTags> t;
if(last)
{
t=new lt_XMLTags(tag.substr(1,len-1));
level[last]->addtag(t);
if(tag[len-2] != '/')
{
level.append(t);
}
}else if(tag[len-2] != '/')
{
char const *n;
GUTF8String xtag = tag.substr(1,-1);
name=tagtoname(xtag, n);
ParseValues(n,args);
t=this;
level.append(t);
}else
{
G_THROW( ERR_MSG("XMLTags.no_body") );
}
t->set_Line(linesread+1);
break;
}
}
if((raw=xmlbs.gets(0,'<',false))[0])
{
linesread=xmlbs.get_lines_read();
GPosition last=level.lastpos();
if(last)
{
level[last]->addraw(raw);
}else if(!isspaces(raw))
{
G_THROW(( ERR_MSG("XMLTags.raw_string") "\t")+raw);
}
}
}
}
GPList<lt_XMLTags>
lt_XMLTags::get_Tags(char const tagname[]) const
{
GPosition pos=allTags.contains(tagname);
GPList<lt_XMLTags> retval;
return (pos?allTags[pos]:retval);
}
void
lt_XMLTags::get_Maps(char const tagname[],
char const argn[],
GPList<lt_XMLTags> list,
GMap<GUTF8String, GP<lt_XMLTags> > &map)
{
for(GPosition pos=list;pos;++pos)
{
GP<lt_XMLTags> &tag=list[pos];
if(tag)
{
GPosition loc;
if((loc=tag->contains(tagname)))
{
GPList<lt_XMLTags> maps=(GPList<lt_XMLTags> &)((*tag)[loc]);
for(GPosition mloc=maps;mloc;++mloc)
{
GP<lt_XMLTags> gtag=maps[mloc];
if(gtag)
{
GMap<GUTF8String,GUTF8String> &args=gtag->args;
GPosition gpos;
if((gpos=args.contains(argn)))
{
map[args[gpos]]=gtag;
}
}
}
}
}
}
}
void
lt_XMLTags::write(ByteStream &bs,bool const top) const
{
if(name.length())
{
GUTF8String tag="<"+name;
for(GPosition pos=args;pos;++pos)
{
tag+=GUTF8String(' ')+args.key(pos)+GUTF8String("=\42")+args[pos].toEscaped()+GUTF8String("\42");
}
GPosition tags=content;
if(tags||raw.length())
{
tag+=">";
bs.writall((const char *)tag,tag.length());
tag="</"+name+">";
if(raw.length())
{
bs.writestring(raw);
}
for(;tags;++tags)
{
content[tags].write(bs);
}
}else if(!raw.length())
{
tag+="/>";
}
bs.writall((const char *)tag,tag.length());
}
if(top)
{
bs.writall("\n",1);
}
}
void
lt_XMLContents::write(ByteStream &bs) const
{
if(tag)
{
tag->write(bs,false);
}
if(raw.length())
{
bs.writestring(raw);
}
}
#ifdef HAVE_NAMESPACES
}
# ifndef NOT_USING_DJVU_NAMESPACE
using namespace DJVU;
# endif
#endif
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