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tdegraphics/kviewshell/plugins/djvu/libdjvu/GIFFManager.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: GIFFManager.cpp,v 1.8 2003/11/07 22:08:21 leonb Exp $
// $Name: release_3_5_15 $
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#if NEED_GNUG_PRAGMAS
# pragma implementation
#endif
#include "GIFFManager.h"
#include "GException.h"
#include "debug.h"
#ifdef HAVE_NAMESPACES
namespace DJVU {
# ifdef NOT_DEFINED // Just to fool emacs c++ mode
}
#endif
#endif
GIFFChunk::~GIFFChunk(void) {}
GIFFManager::~GIFFManager(void) {}
GP<GIFFManager>
GIFFManager::create(void)
{
GIFFManager *iff=new GIFFManager();
GP<GIFFManager> retval=iff;
iff->init();
return retval;
}
GP<GIFFManager>
GIFFManager::create(const GUTF8String &name)
{
GIFFManager *iff=new GIFFManager();
GP<GIFFManager> retval=iff;
iff->init(name);
return retval;
}
void
GIFFChunk::set_name(GUTF8String name)
{
DEBUG_MSG("GIFFChunk::set_name(): name='" << name << "'\n");
DEBUG_MAKE_INDENT(3);
const int colon=name.search(':');
if(colon>=0)
{
type=name.substr(0,colon);
name=name.substr(colon+1,(unsigned int)-1);
if(name.search(':')>=0)
G_THROW( ERR_MSG("GIFFManager.one_colon") );
}
DEBUG_MSG("auto-setting type to '" << type << "'\n");
if (name.contains(".[]")>=0)
G_THROW( ERR_MSG("GIFFManager.bad_char") );
strncpy(GIFFChunk::name, (const char *)name, 4);
GIFFChunk::name[4]=0;
for(int i=strlen(GIFFChunk::name);i<4;i++)
GIFFChunk::name[i]=' ';
}
bool
GIFFChunk::check_name(GUTF8String name)
{
GUTF8String type;
const int colon=name.search(':');
if(colon>=0)
{
type=name.substr(0,colon);
name=name.substr(colon+1,(unsigned int)-1);
}
const GUTF8String sname=(name.substr(0,4)+" ").substr(0,4);
DEBUG_MSG("GIFFChunk::check_name(): type='" << type << "' name='" << sname << "'\n");
return (type==GIFFChunk::type || !type.length() && GIFFChunk::type=="FORM")
&& sname==GIFFChunk::name;
}
void
GIFFChunk::save(IFFByteStream & istr, bool use_trick)
{
DEBUG_MSG("GIFFChunk::save(): saving chunk '" << get_full_name() << "'\n");
DEBUG_MAKE_INDENT(3);
if (is_container())
{
istr.put_chunk(get_full_name(), use_trick);
if (chunks.size())
{
GPosition pos;
for(pos=chunks;pos;++pos)
if (chunks[pos]->get_type()=="PROP")
chunks[pos]->save(istr);
for(pos=chunks;pos;++pos)
if (chunks[pos]->get_type()!="PROP")
chunks[pos]->save(istr);
} else
{
DEBUG_MSG("but it's empty => saving empty container.\n");
}
istr.close_chunk();
} else
{
istr.put_chunk(get_name(), use_trick);
istr.get_bytestream()->writall((const char *) data, data.size());
istr.close_chunk();
}
}
void
GIFFChunk::add_chunk(const GP<GIFFChunk> & chunk, int position)
{
DEBUG_MSG("GIFFChunk::add_chunk(): Adding chunk to '" << get_name() <<
"' @ position=" << position << "\n");
DEBUG_MAKE_INDENT(3);
if (!type.length())
{
DEBUG_MSG("Converting the tqparent to FORM\n");
type="FORM";
}
if (chunk->get_type()=="PROP")
{
DEBUG_MSG("Converting the tqparent to LIST\n");
type="LIST";
}
GPosition pos;
if (position>=0 && chunks.nth(position, pos))
{
chunks.insert_before(pos, chunk);
}else
{
chunks.append(chunk);
}
}
GUTF8String
GIFFChunk::decode_name(const GUTF8String &name, int &number)
{
DEBUG_MSG("GIFFChunk::decode_name(): Checking brackets in name '" << name << "'\n");
DEBUG_MAKE_INDENT(3);
if (name.search('.')>=0)
G_THROW( ERR_MSG("GIFFManager.no_dots") );
number=0;
const int obracket=name.search('[');
GUTF8String short_name;
if (obracket >= 0)
{
const int cbracket=name.search(']',obracket+1);
if (cbracket < 0)
G_THROW( ERR_MSG("GIFFManager.unmatched") );
if (name.length() > (unsigned int)(cbracket+1))
G_THROW( ERR_MSG("GIFFManager.garbage") );
// number =atoi((const char *)name.substr(obracket+1,cbracket-obracket-1));
number= name.substr(obracket+1,cbracket-obracket-1).toInt();
short_name=name.substr(0,obracket);
}else
{
short_name=name;
}
const int colon=short_name.search(':');
if (colon>=0)
short_name=short_name.substr(colon+1,(unsigned int)-1);
for(int i=short_name.length();i<4;i++)
short_name.setat(i, ' ');
DEBUG_MSG("short_name='" << short_name << "'\n");
DEBUG_MSG("number=" << number << "\n");
return short_name;
}
void
GIFFChunk::del_chunk(const GUTF8String &name)
// The name may contain brackets to specify the chunk number
{
DEBUG_MSG("GIFFChunk::del_chunk(): Deleting chunk '" << name <<
"' from '" << get_name() << "'\n");
DEBUG_MAKE_INDENT(3);
int number;
const GUTF8String short_name=decode_name(name,number);
GPosition pos=chunks;
for(int num=0;pos;++pos)
{
if ((chunks[pos]->get_name()==short_name)&&(num++ == number))
{
chunks.del(pos);
break;
}
}
if(! pos)
{
G_THROW( ERR_MSG("GIFFManager.no_chunk") "\t"+short_name+"\t"+GUTF8String(number)+"\t"+get_name());
}
}
GP<GIFFChunk>
GIFFChunk::get_chunk(const GUTF8String &name, int * pos_ptr)
// The name may contain brackets to specify the chunk number
{
DEBUG_MSG("GIFFChunk::get_chunk(): Returning chunk '" << name <<
"' from '" << get_name() << "'\n");
DEBUG_MAKE_INDENT(3);
int number;
const GUTF8String short_name=decode_name(name,number);
int num=0;
int pos_num;
GP<GIFFChunk> retval;
GPosition pos;
for(pos=chunks, pos_num=0;pos;++pos, pos_num++)
{
if (chunks[pos]->get_name()==short_name && num++==number)
{
if (pos_ptr)
*pos_ptr=pos_num;
retval=chunks[pos];
break;
}
}
return retval;
}
int
GIFFChunk::get_chunks_number(void)
{
DEBUG_MSG("GIFFChunk::get_chunks_number(): Returning number of chunks '" << name <<
"' in '" << get_name() << "'\n");
DEBUG_MAKE_INDENT(3);
return chunks.size();
}
int
GIFFChunk::get_chunks_number(const GUTF8String &name)
{
DEBUG_MSG("GIFFChunk::get_chunks_number(): Returning number of chunks '" << name <<
"' in '" << get_name() << "'\n");
DEBUG_MAKE_INDENT(3);
if (name.contains("[]")>=0)
G_THROW( ERR_MSG("GIFFManager.no_brackets") );
int number;
GUTF8String short_name=decode_name(name,number);
int num=0;
for(GPosition pos=chunks;pos;++pos)
num+=(chunks[pos]->get_name()==short_name);
return num;
}
//************************************************************************
void
GIFFManager::add_chunk(GUTF8String parent_name, const GP<GIFFChunk> & chunk,
int pos)
// parent_name is the fully qualified name of the PARENT
// IT MAY BE EMPTY
// All the required chunks will be created
// pos=-1 means to append the chunk
{
DEBUG_MSG("GIFFManager::add_chunk(): Adding chunk to name='" << parent_name << "'\n");
DEBUG_MAKE_INDENT(3);
if (!top_level->get_name().length())
{
if ((!parent_name.length())||(parent_name[0]!='.'))
G_THROW( ERR_MSG("GIFFManager.no_top_name") );
if (parent_name.length() < 2)
{
// 'chunk' is actually the new top-level chunk
DEBUG_MSG("since parent_name=='.', making the chunk top-level\n");
if (!chunk->is_container())
G_THROW( ERR_MSG("GIFFManager.no_top_cont") );
top_level=chunk;
return;
}
DEBUG_MSG("Setting the name of the top-level chunk\n");
const int next_dot=parent_name.search('.',1);
if(next_dot>=0)
{
top_level->set_name(parent_name.substr(1,next_dot-1));
}else
{
top_level->set_name(parent_name.substr(1,(unsigned int)-1));
}
}
DEBUG_MSG("top level chunk name='" << top_level->get_name() << "'\n");
if (parent_name.length() && parent_name[0] == '.')
{
int next_dot=parent_name.search('.',1);
if(next_dot<0)
{
next_dot=parent_name.length();
}
GUTF8String top_name=parent_name.substr(1,next_dot-1);
if (!top_level->check_name(top_name))
G_THROW( ERR_MSG("GIFFManager.wrong_name") "\t"+top_name);
parent_name=parent_name.substr(next_dot,(unsigned int)-1);
}
GP<GIFFChunk> cur_sec=top_level;
const char * start, * end=(const char *)parent_name-1;
do
{
for(start=++end;*end&&(*end!='.');end++)
EMPTY_LOOP;
if (end>start)
{
GUTF8String name(start,end-start);
GUTF8String short_name;
int number=0;
const int obracket=name.search('[');
if (obracket >= 0)
{
const int cbracket=name.search(']',obracket+1);
if (cbracket < 0)
G_THROW( ERR_MSG("GIFFManager.unmatched") );
// number=atoi((const char *)name.substr(obracket+1,cbracket-obracket-1));
number = name.substr(obracket+1,cbracket-obracket-1).toInt();
short_name=name.substr(0,obracket);
}else
{
short_name=name;
}
for(int i=cur_sec->get_chunks_number(short_name);i<number+1;i++)
cur_sec->add_chunk(GIFFChunk::create(short_name));
cur_sec=cur_sec->get_chunk(name);
if (!cur_sec)
G_THROW( ERR_MSG("GIFFManager.unknown") "\t"+name);
}
} while(*end);
cur_sec->add_chunk(chunk, pos);
}
void
GIFFManager::add_chunk(GUTF8String name, const TArray<char> & data)
// name is fully qualified name of the chunk TO BE INSERTED.
// it may contain brackets at the end to set the position
// All the required chunks will be created
{
DEBUG_MSG("GIFFManager::add_chunk(): adding plain chunk with name='" << name << "'\n");
DEBUG_MAKE_INDENT(3);
GUTF8String chunk_name;
const int lastdot=name.rsearch('.');
if(lastdot < 0)
{
chunk_name=name;
name=name.substr(0,lastdot);
}else
{
chunk_name=name.substr(lastdot+1,(unsigned int)-1);
}
int pos=-1;
const int obracket=chunk_name.search('[');
if (obracket >= 0)
{
const int cbracket=chunk_name.search(']',obracket+1);
if (cbracket < 0)
G_THROW( ERR_MSG("GIFFManager.unmatched") );
if (name.length() > (unsigned int)(cbracket+1))
G_THROW( ERR_MSG("GIFFManager.garbage") );
// pos=atoi((const char *)chunk_name.substr(obracket+1,cbracket-obracket-1));
pos = chunk_name.substr(obracket+1,cbracket-obracket-1).toInt();
chunk_name=chunk_name.substr(0,obracket);
}
DEBUG_MSG("Creating new chunk with name " << chunk_name << "\n");
GP<GIFFChunk> chunk;
chunk=GIFFChunk::create(chunk_name, data);
add_chunk(name, chunk, pos);
}
void
GIFFManager::del_chunk(void)
{
DEBUG_MSG("GIFFManager::del_chunk(): Deleting chunk\n");
DEBUG_MAKE_INDENT(3);
G_THROW( ERR_MSG("GIFFManager.del_empty") );
}
void
GIFFManager::del_chunk(GUTF8String name)
// "name" should be fully qualified, that is contain dots.
// It may also end with [] to set the chunk order number
{
DEBUG_MSG("GIFFManager::del_chunk(): Deleting chunk '" << name << "'\n");
DEBUG_MAKE_INDENT(3);
if (!name.length())
G_THROW( ERR_MSG("GIFFManager.del_empty") );
if (name[0]=='.')
{
const int next_dot=name.search('.',1);
if (next_dot < 0)
{
if (top_level->check_name(name.substr(1,(unsigned int)-1)))
{
DEBUG_MSG("Removing top level chunk..\n");
top_level=GIFFChunk::create();
return;
}
G_THROW( ERR_MSG("GIFFManager.wrong_name2") "\t"+name.substr(1,(unsigned int)-1));
}
const GUTF8String top_name=name.substr(1,next_dot-1);
if (!top_level->check_name(top_name))
G_THROW( ERR_MSG("GIFFManager.wrong_name2") "\t"+top_name);
name=name.substr(next_dot+1,(unsigned int)-1);
}
GP<GIFFChunk> cur_sec=top_level;
const char * start, * end=(const char *)name-1;
do
{
for(start=++end;*end&&(*end!='.');end++)
EMPTY_LOOP;
if (end>start && *end=='.')
cur_sec=cur_sec->get_chunk(GUTF8String(start, end-start));
if (!cur_sec)
G_THROW( ERR_MSG("GIFFManager.cant_find") "\t"+GUTF8String(name));
} while(*end);
if (!start[0])
{
G_THROW(GUTF8String( ERR_MSG("GIFFManager.malformed") "\t")+name);
}
cur_sec->del_chunk(start);
}
GP<GIFFChunk>
GIFFManager::get_chunk(GUTF8String name, int * pos_num)
// "name" should be fully qualified, that is contain dots.
// It may also end with [] to set the chunk order number
{
DEBUG_MSG("GIFFManager::get_chunk(): Returning chunk '" << name << "'\n");
DEBUG_MAKE_INDENT(3);
if (!name.length())
G_THROW( ERR_MSG("GIFFManager.get_empty") );
if (name[0]=='.')
{
const int next_dot=name.search('.',1);
if (next_dot < 0)
{
if (top_level->check_name(name.substr(1,(unsigned int)-1)))
{
DEBUG_MSG("Removing top level chunk..\n");
return top_level;
}
G_THROW( ERR_MSG("GIFFManager.wrong_name2") "\t"+name.substr(1,(unsigned int)-1));
}
const GUTF8String top_name=name.substr(1,next_dot-1);
if (!top_level->check_name(top_name))
G_THROW( ERR_MSG("GIFFManager.wrong_name2") "\t"+top_name);
name=name.substr(next_dot+1,(unsigned int)-1);
}
GP<GIFFChunk> cur_sec=top_level;
const char * start, * end=(const char *) name-1;
do
{
for(start=++end;*end&&(*end!='.');end++)
EMPTY_LOOP;
if (end>start)
cur_sec=cur_sec->get_chunk(GUTF8String(start, end-start), pos_num);
if (!cur_sec)
break;
} while(*end);
return cur_sec;
}
int
GIFFManager::get_chunks_number(void)
{
DEBUG_MSG("GIFFManager::get_chunks_number()\n");
DEBUG_MAKE_INDENT(3);
return top_level->get_chunks_number();
}
int
GIFFManager::get_chunks_number(const GUTF8String &name)
// Returns the number of chunks with given fully qualified name
{
DEBUG_MSG("GIFFManager::get_chunks_number(): name='" << name << "'\n");
DEBUG_MAKE_INDENT(3);
int retval;
const int last_dot=name.rsearch('.');
if (last_dot<0)
{
retval=top_level->get_chunks_number(name);
}else if(!last_dot)
{
retval=(top_level->get_name()==name.substr(1,(unsigned int)-1))?1:0;
}else
{
GP<GIFFChunk> chunk=get_chunk(name.substr(0,last_dot));
retval=( chunk
?(chunk->get_chunks_number(name.substr(last_dot+1,(unsigned int)-1)))
:0 );
}
return retval;
}
void
GIFFManager::load_chunk(IFFByteStream & istr, GP<GIFFChunk> chunk)
{
DEBUG_MSG("GIFFManager::load_chunk(): loading contents of chunk '" <<
chunk->get_name() << "'\n");
DEBUG_MAKE_INDENT(3);
int chunk_size;
GUTF8String chunk_id;
while ((chunk_size=istr.get_chunk(chunk_id)))
{
if (istr.check_id(chunk_id))
{
GP<GIFFChunk> ch=GIFFChunk::create(chunk_id);
load_chunk(istr, ch);
chunk->add_chunk(ch);
} else
{
TArray<char> data(chunk_size-1);
istr.get_bytestream()->readall( (char*)data, data.size());
GP<GIFFChunk> ch=GIFFChunk::create(chunk_id, data);
chunk->add_chunk(ch);
}
istr.close_chunk();
}
}
void
GIFFManager::load_file(const TArray<char> & data)
{
GP<ByteStream> str=ByteStream::create((const char *)data, data.size());
load_file(str);
}
void
GIFFManager::load_file(GP<ByteStream> str)
{
DEBUG_MSG("GIFFManager::load_file(): Loading IFF file.\n");
DEBUG_MAKE_INDENT(3);
GP<IFFByteStream> gistr=IFFByteStream::create(str);
IFFByteStream &istr=*gistr;
GUTF8String chunk_id;
if (istr.get_chunk(chunk_id))
{
if (chunk_id.substr(0,5) != "FORM:")
G_THROW( ERR_MSG("GIFFManager.cant_find2") );
set_name(chunk_id);
load_chunk(istr, top_level);
istr.close_chunk();
}
}
void
GIFFManager::save_file(TArray<char> & data)
{
GP<ByteStream> gstr=ByteStream::create();
save_file(gstr);
data=gstr->get_data();
}
void
GIFFManager::save_file(GP<ByteStream> str)
{
GP<IFFByteStream> istr=IFFByteStream::create(str);
top_level->save(*istr, 1);
}
#ifdef HAVE_NAMESPACES
}
# ifndef NOT_USING_DJVU_NAMESPACE
using namespace DJVU;
# endif
#endif
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