C++ (Cpp) LVStreamRef::Seek Examples

Example #1

File: hyphman.cpp Project: CrazyCoder/crengine

bool TexHyph::load( LVStreamRef stream )
{
    int w = isCorrectHyphFile(stream.get());
    int patternCount = 0;
    if (w) {
        _hash = stream->crc32();
        int        i;
        lvsize_t   dw;

        lvByteOrderConv cnv;

        int hyph_count = w;
        thyph hyph;

        lvpos_t p = 78 + (hyph_count * 8 + 2);
        stream->SetPos(p);
        if ( stream->SetPos(p)!=p )
            return false;
        lChar16 charMap[256];
        unsigned char buf[0x10000];
        memset( charMap, 0, sizeof( charMap ) );
        // make char map table
        for (i=0; i<hyph_count; i++)
        {
            if ( stream->Read( &hyph, 522, &dw )!=LVERR_OK || dw!=522 ) 
                return false;
            cnv.msf( &hyph.len ); //rword(_main_hyph[i].len);
            lvpos_t newPos;
            if ( stream->Seek( hyph.len, LVSEEK_CUR, &newPos )!=LVERR_OK )
                return false;

            cnv.msf( hyph.wl );
            cnv.msf( hyph.wu );
            charMap[ (unsigned char)hyph.al ] = hyph.wl;
            charMap[ (unsigned char)hyph.au ] = hyph.wu;
//            lChar16 ch = hyph.wl;
//            CRLog::debug("wl=%s mask=%c%c", LCSTR(lString16(&ch, 1)), hyph.mask0[0], hyph.mask0[1]);
            if (hyph.mask0[0]!='0'||hyph.mask0[1]!='0') {
                unsigned char pat[4];
                pat[0] = hyph.al;
                pat[1] = hyph.mask0[0];
                pat[2] = hyph.mask0[1];
                pat[3] = 0;
                TexPattern * pattern = new TexPattern(pat, 1, charMap);
#if DUMP_PATTERNS==1
                CRLog::debug("Pattern: '%s' - %s", LCSTR(lString16(pattern->word)), pattern->attr );
#endif
                addPattern( pattern );
                patternCount++;
            }
        }

        if ( stream->SetPos(p)!=p )
            return false;

        for (i=0; i<hyph_count; i++)
        {
            stream->Read( &hyph, 522, &dw );
            if (dw!=522) 
                return false;
            cnv.msf( &hyph.len );

            stream->Read(buf, hyph.len, &dw); 
            if (dw!=hyph.len)
                return false;

            unsigned char * p = buf;
            unsigned char * end_p = p + hyph.len;
            while ( p < end_p ) {
                lUInt8 sz = *p++;
                if ( p + sz > end_p )
                    break;
                TexPattern * pattern = new TexPattern( p, sz, charMap );
#if DUMP_PATTERNS==1
                CRLog::debug("Pattern: '%s' - %s", LCSTR(lString16(pattern->word)), pattern->attr);
#endif
                addPattern( pattern );
                patternCount++;
                p += sz + sz + 1;
            }
        }

        return patternCount>0;
    } else {
        // tex xml format as for FBReader
        lString16Collection data;
        HyphPatternReader reader( data );
        LVXMLParser parser( stream, &reader );
        if ( !parser.CheckFormat() )
            return false;
        if ( !parser.Parse() )
            return false;
        if ( !data.length() )
            return false;
        for ( int i=0; i<(int)data.length(); i++ ) {
            data[i].lowercase();
            TexPattern * pattern = new TexPattern( data[i] );
#if DUMP_PATTERNS==1
            CRLog::debug("Pattern: (%s) '%s' - %s", LCSTR(data[i]), LCSTR(lString16(pattern->word)), pattern->attr);
#endif
            addPattern( pattern );
            patternCount++;
        }
        return patternCount>0;
    }
}