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goldendict-ng/bgl_babylon.cc
Abs62 2763b74635 Use file names in UTF-8. Fix issue #30.
2011-09-09 16:05:28 +04:00

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/***************************************************************************
* Copyright (C) 2007 by Raul Fernandes and Karl Grill *
* rgbr@yahoo.com.br *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the *
* Free Software Foundation, Inc., *
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. *
***************************************************************************/
/* Various improvements were made by Konstantin Isakov for the GoldenDict
* program. */
#include "bgl_babylon.hh"
#include <algorithm>
#include<stdlib.h>
#include<string.h>
#include<stdio.h>
#include<iconv.h>
#include <QTextDocument>
#include "dprintf.hh"
#include "ufile.hh"
#ifdef _WIN32
#include <io.h>
#define DUP _dup
#else
#define DUP dup
#endif
using std::string;
Babylon::Babylon( std::string filename )
{
m_filename = filename;
file = NULL;
}
Babylon::~Babylon()
{
close();
}
bool Babylon::open()
{
FILE *f;
unsigned char buf[6];
int i;
f = gd_fopen( m_filename.c_str(), "rb" );
if( f == NULL )
return false;
i = fread( buf, 1, 6, f );
/* First four bytes: BGL signature 0x12340001 or 0x12340002 (big-endian) */
if( i < 6 || memcmp( buf, "\x12\x34\x00", 3 ) || buf[3] == 0 || buf[3] > 2 )
{
fclose( f );
return false;
}
/* Calculate position of gz header */
i = buf[4] << 8 | buf[5];
if( i < 6 )
{
fclose( f );
return false;
}
if( fseek( f, i, SEEK_SET ) ) /* can't seek - emulate */
for(int j=0;j < i - 6;j++) fgetc( f );
if( ferror( f ) || feof( f ) )
{
fclose( f );
return false;
}
/* we need to flush the file because otherwise some nfs mounts don't seem
* to properly update the file position for the following reopen */
fflush( f );
file = gzdopen( DUP( fileno( f ) ), "r" );
fclose( f );
if( file == NULL )
return false;
return true;
}
void Babylon::close()
{
if ( file )
{
gzclose( file );
file = 0;
}
}
bool Babylon::readBlock( bgl_block &block )
{
if( gzeof( file ) || file == NULL )
return false;
block.length = bgl_readnum( 1 );
block.type = block.length & 0xf;
if( block.type == 4 ) return false; // end of file marker
block.length >>= 4;
block.length = block.length < 4 ? bgl_readnum( block.length + 1 ) : block.length - 4 ;
if( block.length )
{
block.data = (char *)malloc( block.length );
gzread( file, block.data, block.length );
}
return true;
}
unsigned int Babylon::bgl_readnum( int bytes )
{
unsigned char buf[4];
unsigned val = 0;
if ( bytes < 1 || bytes > 4 ) return (0);
gzread( file, buf, bytes );
for(int i=0;i<bytes;i++) val= (val << 8) | buf[i];
return val;
}
bool Babylon::read(std::string &source_charset, std::string &target_charset)
{
if( file == NULL ) return false;
bgl_block block;
unsigned int pos;
unsigned int type;
std::string headword;
std::string definition;
bool isUtf8File = false;
m_sourceCharset = source_charset;
m_targetCharset = target_charset;
m_numEntries = 0;
while( readBlock( block ) )
{
headword.clear();
definition.clear();
switch( block.type )
{
case 0:
switch( block.data[0] )
{
case 8:
type = (unsigned int)block.data[2];
if( type > 64 ) type -= 65;
if ( type >= 14 )
type = 0;
m_defaultCharset = bgl_charset[type];
break;
default:
break;
}
break;
case 1:
case 10:
// Only count entries
m_numEntries++;
break;
case 3:
pos = 2;
switch( block.data[1] )
{
case 1:
headword.reserve( block.length - 2 );
for(unsigned int a=0;a<block.length-2;a++) headword += block.data[pos++];
m_title = headword;
break;
case 2:
headword.reserve( block.length - 2 );
for(unsigned int a=0;a<block.length-2;a++) headword += block.data[pos++];
m_author = headword;
break;
case 3:
headword.reserve( block.length - 2 );
for(unsigned int a=0;a<block.length-2;a++) headword += block.data[pos++];
m_email = headword;
break;
case 4:
headword.reserve( block.length - 2 );
for(unsigned int a=0;a<block.length-2;a++) headword += block.data[pos++];
m_copyright = headword;
break;
case 7:
headword = bgl_language[(unsigned char)(block.data[5])];
m_sourceLang = headword;
break;
case 8:
headword = bgl_language[(unsigned char)(block.data[5])];
m_targetLang = headword;
break;
case 9:
headword.reserve( block.length - 2 );
for(unsigned int a=0;a<block.length-2;a++) {
if (block.data[pos] == '\r') {
} else if (block.data[pos] == '\n') {
headword += "<br>";
} else {
headword += block.data[pos];
}
pos++;
}
m_description = headword;
break;
case 11:
icon.resize( block.length - 2 );
memcpy( &icon.front(), &(block.data[ 2 ]), icon.size() );
break;
case 17:
if ( block.length >= 5 && (unsigned char) block.data[ 4 ] == 0x80 )
isUtf8File = true;
break;
case 26:
type = (unsigned int)block.data[2];
if( type > 64 ) type -= 65;
if ( type >= 14 )
type = 0;
if (m_sourceCharset.empty())
m_sourceCharset = bgl_charset[type];
break;
case 27:
type = (unsigned int)block.data[2];
if( type > 64 ) type -= 65;
if ( type >= 14 )
type = 0;
if (m_targetCharset.empty())
m_targetCharset = bgl_charset[type];
break;
default:
break;
}
break;
default:
;
}
if( block.length ) free( block.data );
}
gzseek( file, 0, SEEK_SET );
if ( isUtf8File )
{
//FDPRINTF( stderr, "%s: utf8 file.\n", m_title.c_str() );
m_defaultCharset = "UTF-8";
m_sourceCharset = "UTF-8";
m_targetCharset = "UTF-8";
}
convertToUtf8( m_title, TARGET_CHARSET );
convertToUtf8( m_author, TARGET_CHARSET );
convertToUtf8( m_email, TARGET_CHARSET );
convertToUtf8( m_copyright, TARGET_CHARSET );
convertToUtf8( m_description, TARGET_CHARSET );
DPRINTF("Default charset: %s\nSource Charset: %s\nTargetCharset: %s\n", m_defaultCharset.c_str(), m_sourceCharset.c_str(), m_targetCharset.c_str());
return true;
}
bgl_entry Babylon::readEntry( ResourceHandler * resourceHandler )
{
bgl_entry entry;
if( file == NULL )
{
entry.headword = "";
return entry;
}
bgl_block block;
unsigned int len, pos;
std::string headword, displayedHeadword;
std::string definition;
std::string temp;
std::vector<std::string> alternates;
std::string alternate;
std::string root;
bool defBodyEnded = false;
while( readBlock( block ) )
{
switch( block.type )
{
case 2:
{
pos = 0;
len = (unsigned char)block.data[pos++];
std::string filename( block.data+pos, len );
//if (filename != "8EAF66FD.bmp" && filename != "C2EEF3F6.html") {
pos += len;
if ( resourceHandler )
resourceHandler->handleBabylonResource( filename,
block.data + pos,
block.length - pos );
#if 0
FILE *ifile = gd_fopen(filename.c_str(), "w");
fwrite(block.data + pos, 1, block.length -pos, ifile);
fclose(ifile);
#endif
break;
}
case 1:
case 10:
alternate.clear();
headword.clear();
displayedHeadword.clear();
root.clear();
definition.clear();
temp.clear();
pos = 0;
// Headword
len = 0;
len = (unsigned char)block.data[pos++];
headword.reserve( len );
for(unsigned int a=0;a<len;a++)
headword += block.data[pos++];
convertToUtf8( headword, SOURCE_CHARSET );
// Definition
len = 0;
len = (unsigned char)block.data[pos++] << 8;
len |= (unsigned char)block.data[pos++];
definition.reserve( len );
for(unsigned int a=0;a<len;a++)
{
if( (unsigned char)block.data[pos] == 0x0a )
{
definition += "<br>";
pos++;
}
else if ( (unsigned char)block.data[pos] == 6 )
{
// Something
pos += 2;
++a;
definition += " ";
}
else if ( (unsigned char)block.data[pos] >= 0x40 &&
len - a >= 2 &&
(unsigned char)block.data[pos + 1 ] == 0x18 )
{
// Hidden displayed headword (a displayed headword which
// contains some garbage and shouldn't probably be visible).
unsigned length = (unsigned char)block.data[ pos ] - 0x3F;
if ( length > len - a - 2 )
{
FDPRINTF( stderr, "Hidden displayed headword is too large %s\n", headword.c_str() );
pos += len - a;
break;
}
pos += length + 2;
a += length + 1;
}
else if ( (unsigned char)block.data[pos] == 0x18 )
{
// Displayed headword
unsigned length = (unsigned char)block.data[ pos + 1 ];
if ( length > len - a - 2 )
{
FDPRINTF( stderr, "Displayed headword's length is too large for headword %s\n", headword.c_str() );
pos += len - a;
break;
}
displayedHeadword = std::string( block.data + pos + 2, length );
pos += length + 2;
a += length + 1;
}
else
if ( block.data[ pos ] == 0x28 && defBodyEnded &&
len - a >= 3 )
{
// 2-byte sized displayed headword
unsigned length = (unsigned char)block.data[ pos + 1 ];
length <<= 8;
length += (unsigned char)block.data[ pos + 2 ];
if ( length > len - a - 3 )
{
FDPRINTF( stderr, "2-byte sized displayed headword for %s is too large\n", headword.c_str() );
pos += len - a;
break;
}
displayedHeadword = std::string( block.data + pos + 3, length );
pos += length + 3;
a += length + 2;
}
else if ( (unsigned char)block.data[pos] == 0x50 && len - a - 1 >= 2 &&
(unsigned char)block.data[pos + 1 ] == 0x1B )
{
// 1-byte-sized transcription
unsigned length = (unsigned char)block.data[pos + 2 ];
if ( length > len - a - 3 )
{
FDPRINTF( stderr, "1-byte-sized transcription's length is too large for headword %s\n", headword.c_str() );
pos += len - a;
break;
}
std::string transcription( block.data + pos + 3, length );
definition = std::string( "<span class=\"bgltrn\">" ) + transcription + "</span>" + definition;
pos += length + 3;
a += length + 2;
}
else if ( (unsigned char)block.data[pos] == 0x60 && len - a - 1 >= 3 &&
(unsigned char)block.data[pos + 1 ] == 0x1B )
{
// 2-byte-sized transcription
unsigned length = (unsigned char)block.data[pos + 2 ];
length <<= 8;
length += (unsigned char)block.data[pos + 3 ];
if ( length > len - a - 4)
{
FDPRINTF( stderr, "2-byte-sized transcription's length is too large for headword %s\n", headword.c_str() );
pos += len - a;
break;
}
std::string transcription( block.data + pos + 4, length );
definition = std::string( "<span class=\"bgltrn\">" ) + transcription + "</span>" + definition;
pos += length + 4;
a += length + 3;
}
else if ( (unsigned char)block.data[pos] >= 0x40 &&
len - a >= 2 &&
(unsigned char)block.data[pos + 1 ] == 0x1B )
{
// Hidden transcription (a transcription which is usually the same
// as the headword and shouldn't probably be visible).
unsigned length = (unsigned char)block.data[ pos ] - 0x3F;
if ( length > len - a - 2 )
{
FDPRINTF( stderr, "Hidden transcription is too large %s\n", headword.c_str() );
pos += len - a;
break;
}
pos += length + 2;
a += length + 1;
}
else if ( (unsigned char)block.data[pos] == 0x1E )
{
// Resource reference begin marker
definition += m_resourcePrefix;
++pos;
}
else if ( (unsigned char)block.data[pos] == 0x1F )
{
// Resource reference end marker
++pos;
}
else if( (unsigned char)block.data[pos] < 0x20 )
{
if( a <= len - 3 && block.data[pos] == 0x14 && block.data[pos+1] == 0x02 ) {
int index = (unsigned char)block.data[pos+2] - 0x30;
if (index >= 0 && index <= 10) {
definition = "<span class=\"bglpos\">" + partOfSpeech[index] + "</span> " + definition;
}
pos += 3;
a += 2;
//pos += len - a;
//break;
}
else
if (block.data[pos] == 0x14) {
defBodyEnded = true; // Presumably
pos++;
} else if ((unsigned char)block.data[pos] == 0x1A){
unsigned length = (unsigned char)block.data[ pos + 1 ];
if (length <= 10){// 0x1A identifies two different data types.
// data about the Hebrew root should be shorter then
// 10 bytes, and in the other data type the byte
// after 0x1A is > 10 (at least it is in Bybylon's
// Hebrew dictionaries).
root = std::string( block.data + pos + 2, length );
std::reverse(root.begin(),root.end());
definition += " (" + root + ")";
pos += length + 2;
a += length + 1;
}
else
pos++;
} else {
definition += block.data[pos++];
}
}else definition += block.data[pos++];
}
convertToUtf8( definition, TARGET_CHARSET );
if ( displayedHeadword.size() )
convertToUtf8( displayedHeadword, TARGET_CHARSET );
// Alternate forms
while( pos != block.length )
{
len = (unsigned char)block.data[pos++];
alternate.reserve( len );
for(unsigned int a=0;a<len;a++) alternate += block.data[pos++];
convertToUtf8( alternate, SOURCE_CHARSET );
alternates.push_back( alternate );
alternate.clear();
}
// Try adding displayed headword to the list of alts
if ( headword != displayedHeadword )
{
// Only add displayed headword if the normal one has two or more digits.
// This would indicate some irregularity in it (like e.g. if it serves
// as some kind of an identifier instead of being an actual headword)
int totalDigits = 0;
for( char const * p = headword.c_str(); *p; ++p )
if ( *p >= '0' && *p <= '9' )
{
if ( ++totalDigits > 1 )
break;
}
if ( totalDigits > 1 )
{
// Ok, let's add it.
// Does it contain HTML? If it does, we need to strip it
if ( displayedHeadword.find( '<' ) != string::npos ||
displayedHeadword.find( '&' ) != string::npos )
{
QTextDocument d;
d.setHtml( QString::fromUtf8( displayedHeadword.data(), displayedHeadword.size() ) );
string result = d.toPlainText().toUtf8().data();
if ( result != headword )
alternates.push_back( result );
}
else
alternates.push_back(displayedHeadword);
}
}
entry.headword = headword;
entry.displayedHeadword = displayedHeadword;
entry.definition = definition;
entry.alternates = alternates;
if( block.length ) free( block.data );
// Some dictionaries can in fact have an empty headword, so we
// make it non-empty here to differentiate between the end of entries.
if ( entry.headword.empty() )
entry.headword += ' ';
return entry;
break;
default:
;
}
if( block.length ) free( block.data );
}
entry.headword = "";
return entry;
}
void Babylon::convertToUtf8( std::string &s, unsigned int type )
{
if( s.size() < 1 ) return;
if( type > 2 ) return;
std::string charset;
switch( type )
{
case DEFAULT_CHARSET:
if(!m_defaultCharset.empty()) charset = m_defaultCharset;
else charset = m_sourceCharset;
break;
case SOURCE_CHARSET:
if(!m_sourceCharset.empty()) charset = m_sourceCharset;
else charset = m_defaultCharset;
break;
case TARGET_CHARSET:
if(!m_targetCharset.empty()) charset = m_targetCharset;
else charset = m_defaultCharset;
break;
default:
;
}
iconv_t cd = iconv_open( "UTF-8", charset.c_str() );
if( cd == (iconv_t)(-1) )
{
DPRINTF( "Error openning iconv library\n" );
exit(1);
}
char *outbuf, *defbuf;
size_t inbufbytes, outbufbytes;
inbufbytes = s.size();
outbufbytes = s.size() * 6;
//#ifdef _WIN32
// const char *inbuf;
// inbuf = s.data();
//#else
char *inbuf;
inbuf = (char *)s.data();
//#endif
outbuf = (char*)malloc( outbufbytes + 1 );
memset( outbuf, '\0', outbufbytes + 1 );
defbuf = outbuf;
while (inbufbytes) {
if (iconv(cd, &inbuf, &inbufbytes, &outbuf, &outbufbytes) == (size_t)-1) {
DPRINTF( "\n%s\n", inbuf );
DPRINTF( "Error in iconv conversion\n" );
inbuf++;
inbufbytes--;
}
}
// Flush the state. This fixes CP1255 problems.
iconv( cd, 0, 0, &outbuf, &outbufbytes );
s = std::string( defbuf );
free( defbuf );
iconv_close( cd );
}
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