Esempio n. 1
0
  otv_u_x_y_Ox_sy( FT_Bytes       table,
                   OTV_Validator  otvalid )
  {
    FT_Bytes  p = table;
    FT_UInt   GlyphCount, Count, count1;


    OTV_ENTER;

    p += 2;     /* skip Format */

    OTV_LIMIT_CHECK( 4 );
    GlyphCount = FT_NEXT_USHORT( p );
    Count      = FT_NEXT_USHORT( p );

    OTV_TRACE(( " (GlyphCount = %d)\n", GlyphCount ));
    OTV_TRACE(( " (Count = %d)\n",      Count      ));

    OTV_LIMIT_CHECK( GlyphCount * 2 + Count * 4 );

    for ( count1 = GlyphCount; count1 > 0; count1-- )
      otv_Coverage_validate( table + FT_NEXT_USHORT( p ), otvalid, -1 );

    for ( ; Count > 0; Count-- )
    {
      if ( FT_NEXT_USHORT( p ) >= GlyphCount )
        FT_INVALID_DATA;

      if ( FT_NEXT_USHORT( p ) >= otvalid->lookup_count )
        FT_INVALID_DATA;
    }

    OTV_EXIT;
  }
Esempio n. 2
0
  otv_x_y_ux_sy( FT_Bytes       table,
                 OTV_Validator  otvalid )
  {
    FT_Bytes  p = table;
    FT_UInt   Count1, Count2;


    OTV_ENTER;

    OTV_LIMIT_CHECK( 4 );
    Count1 = FT_NEXT_USHORT( p );
    Count2 = FT_NEXT_USHORT( p );

    OTV_TRACE(( " (Count1 = %d)\n", Count1 ));
    OTV_TRACE(( " (Count2 = %d)\n", Count2 ));

    if ( Count1 == 0 )
      FT_INVALID_DATA;

    OTV_LIMIT_CHECK( ( Count1 - 1 ) * 2 + Count2 * 4 );
    p += ( Count1 - 1 ) * 2;

    for ( ; Count2 > 0; Count2-- )
    {
      if ( FT_NEXT_USHORT( p ) >= Count1 )
        FT_INVALID_DATA;

      if ( FT_NEXT_USHORT( p ) >= otvalid->extra1 )
        FT_INVALID_DATA;
    }

    OTV_EXIT;
  }
Esempio n. 3
0
  static void
  otv_BaseValues_validate( FT_Bytes       table,
                           OTV_Validator  otvalid )
  {
    FT_Bytes  p = table;
    FT_UInt   BaseCoordCount;


    OTV_NAME_ENTER( "BaseValues" );

    OTV_LIMIT_CHECK( 4 );

    p             += 2;                     /* skip DefaultIndex */
    BaseCoordCount = FT_NEXT_USHORT( p );

    OTV_TRACE(( " (BaseCoordCount = %d)\n", BaseCoordCount ));

    OTV_LIMIT_CHECK( BaseCoordCount * 2 );

    /* BaseCoord */
    for ( ; BaseCoordCount > 0; BaseCoordCount-- )
      otv_BaseCoord_validate( table + FT_NEXT_USHORT( p ), otvalid );

    OTV_EXIT;
  }
Esempio n. 4
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  otv_u_C_x_Ox( FT_Bytes       table,
                OTV_Validator  otvalid )
  {
    FT_Bytes           p = table;
    FT_UInt            Count, Coverage;
    OTV_Validate_Func  func;


    OTV_ENTER;

    p += 2;     /* skip Format */

    OTV_LIMIT_CHECK( 4 );
    Coverage = FT_NEXT_USHORT( p );
    Count    = FT_NEXT_USHORT( p );

    OTV_TRACE(( " (Count = %d)\n", Count ));

    otv_Coverage_validate( table + Coverage, otvalid, (FT_Int)Count );

    OTV_LIMIT_CHECK( Count * 2 );

    otvalid->nesting_level++;
    func = otvalid->func[otvalid->nesting_level];

    for ( ; Count > 0; Count-- )
      func( table + FT_NEXT_USHORT( p ), otvalid );

    otvalid->nesting_level--;

    OTV_EXIT;
  }
Esempio n. 5
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  otv_x_ux( FT_Bytes       table,
            OTV_Validator  otvalid )
  {
    FT_Bytes  p = table;
    FT_UInt   Count;


    OTV_ENTER;

    OTV_LIMIT_CHECK( 2 );
    Count = FT_NEXT_USHORT( p );

    OTV_TRACE(( " (Count = %d)\n", Count ));

    OTV_LIMIT_CHECK( Count * 2 );

    if ( otvalid->extra1 )
    {
      for ( ; Count > 0; Count-- )
        if ( FT_NEXT_USHORT( p ) >= otvalid->extra1 )
          FT_INVALID_DATA;
    }

    OTV_EXIT;
  }
Esempio n. 6
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  otv_ScriptList_validate( FT_Bytes       table,
                           FT_Bytes       features,
                           OTV_Validator  otvalid )
  {
    FT_UInt   ScriptCount;
    FT_Bytes  p = table;


    OTV_NAME_ENTER( "ScriptList" );

    OTV_LIMIT_CHECK( 2 );
    ScriptCount = FT_NEXT_USHORT( p );

    OTV_TRACE(( " (ScriptCount = %d)\n", ScriptCount ));

    OTV_LIMIT_CHECK( ScriptCount * 6 );

    otvalid->extra1 = otv_Feature_get_count( features );

    /* ScriptRecord */
    for ( ; ScriptCount > 0; ScriptCount-- )
    {
      p += 4;       /* skip ScriptTag */

      otv_Script_validate( table + FT_NEXT_USHORT( p ), otvalid ); /* Script */
    }

    OTV_EXIT;
  }
Esempio n. 7
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  static void
  otv_Ligature_validate( FT_Bytes       table,
                         OTV_Validator  otvalid )
  {
    FT_Bytes  p = table;
    FT_UInt   LigatureGlyph, CompCount;


    OTV_ENTER;

    OTV_LIMIT_CHECK( 4 );
    LigatureGlyph = FT_NEXT_USHORT( p );
    if ( LigatureGlyph >= otvalid->glyph_count )
      FT_INVALID_DATA;

    CompCount = FT_NEXT_USHORT( p );

    OTV_TRACE(( " (CompCount = %d)\n", CompCount ));

    if ( CompCount == 0 )
      FT_INVALID_DATA;

    CompCount--;

    OTV_LIMIT_CHECK( CompCount * 2 );     /* Component */

    /* no need to check the Component glyph indices */

    OTV_EXIT;
  }
Esempio n. 8
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  otv_LangSys_validate( FT_Bytes       table,
                        OTV_Validator  otvalid )
  {
    FT_Bytes  p = table;
    FT_UInt   ReqFeatureIndex;
    FT_UInt   FeatureCount;


    OTV_NAME_ENTER( "LangSys" );

    OTV_LIMIT_CHECK( 6 );
    p              += 2;                    /* skip LookupOrder (unused) */
    ReqFeatureIndex = FT_NEXT_USHORT( p );
    FeatureCount    = FT_NEXT_USHORT( p );

    OTV_TRACE(( " (ReqFeatureIndex = %d)\n", ReqFeatureIndex ));
    OTV_TRACE(( " (FeatureCount = %d)\n",    FeatureCount    ));

    if ( ReqFeatureIndex != 0xFFFFU && ReqFeatureIndex >= otvalid->extra1 )
      FT_INVALID_DATA;

    OTV_LIMIT_CHECK( FeatureCount * 2 );

    /* FeatureIndex */
    for ( ; FeatureCount > 0; FeatureCount-- )
      if ( FT_NEXT_USHORT( p ) >= otvalid->extra1 )
        FT_INVALID_DATA;

    OTV_EXIT;
  }
Esempio n. 9
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  otv_Script_validate( FT_Bytes       table,
                       OTV_Validator  otvalid )
  {
    FT_UInt   DefaultLangSys, LangSysCount;
    FT_Bytes  p = table;


    OTV_NAME_ENTER( "Script" );

    OTV_LIMIT_CHECK( 4 );
    DefaultLangSys = FT_NEXT_USHORT( p );
    LangSysCount   = FT_NEXT_USHORT( p );

    OTV_TRACE(( " (LangSysCount = %d)\n", LangSysCount ));

    if ( DefaultLangSys != 0 )
      otv_LangSys_validate( table + DefaultLangSys, otvalid );

    OTV_LIMIT_CHECK( LangSysCount * 6 );

    /* LangSysRecord */
    for ( ; LangSysCount > 0; LangSysCount-- )
    {
      p += 4;       /* skip LangSysTag */

      /* LangSys */
      otv_LangSys_validate( table + FT_NEXT_USHORT( p ), otvalid );
    }

    OTV_EXIT;
  }
Esempio n. 10
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  otv_FeatureList_validate( FT_Bytes       table,
                            FT_Bytes       lookups,
                            OTV_Validator  otvalid )
  {
    FT_Bytes  p = table;
    FT_UInt   FeatureCount;


    OTV_NAME_ENTER( "FeatureList" );

    OTV_LIMIT_CHECK( 2 );
    FeatureCount = FT_NEXT_USHORT( p );

    OTV_TRACE(( " (FeatureCount = %d)\n", FeatureCount ));

    OTV_LIMIT_CHECK( FeatureCount * 2 );

    otvalid->lookup_count = otv_LookupList_get_count( lookups );

    /* FeatureRecord */
    for ( ; FeatureCount > 0; FeatureCount-- )
    {
      p += 4;       /* skip FeatureTag */

      /* Feature */
      otv_Feature_validate( table + FT_NEXT_USHORT( p ), otvalid );
    }

    OTV_EXIT;
  }
Esempio n. 11
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  otv_Lookup_validate( FT_Bytes       table,
                       OTV_Validator  otvalid )
  {
    FT_Bytes           p = table;
    FT_UInt            LookupType, SubTableCount;
    OTV_Validate_Func  validate;


    OTV_NAME_ENTER( "Lookup" );

    OTV_LIMIT_CHECK( 6 );
    LookupType    = FT_NEXT_USHORT( p );
    p            += 2;                      /* skip LookupFlag */
    SubTableCount = FT_NEXT_USHORT( p );

    OTV_TRACE(( " (type %d)\n", LookupType ));

    if ( LookupType == 0 || LookupType > otvalid->type_count )
      FT_INVALID_DATA;

    validate = otvalid->type_funcs[LookupType - 1];

    OTV_TRACE(( " (SubTableCount = %d)\n", SubTableCount ));

    OTV_LIMIT_CHECK( SubTableCount * 2 );

    /* SubTable */
    for ( ; SubTableCount > 0; SubTableCount-- )
      validate( table + FT_NEXT_USHORT( p ), otvalid );

    OTV_EXIT;
  }
Esempio n. 12
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  otv_Device_validate( FT_Bytes       table,
                       OTV_Validator  otvalid )
  {
    FT_Bytes  p = table;
    FT_UInt   StartSize, EndSize, DeltaFormat, count;


    OTV_NAME_ENTER( "Device" );

    OTV_LIMIT_CHECK( 8 );
    StartSize   = FT_NEXT_USHORT( p );
    EndSize     = FT_NEXT_USHORT( p );
    DeltaFormat = FT_NEXT_USHORT( p );

    if ( DeltaFormat < 1 || DeltaFormat > 3 )
      FT_INVALID_FORMAT;

    if ( EndSize < StartSize )
      FT_INVALID_DATA;

    count = EndSize - StartSize + 1;
    OTV_LIMIT_CHECK( ( 1 << DeltaFormat ) * count / 8 );  /* DeltaValue */

    OTV_EXIT;
  }
Esempio n. 13
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  static void
  otv_BaseScriptList_validate( FT_Bytes       table,
                               OTV_Validator  otvalid )
  {
    FT_Bytes  p = table;
    FT_UInt   BaseScriptCount;


    OTV_NAME_ENTER( "BaseScriptList" );

    OTV_LIMIT_CHECK( 2 );
    BaseScriptCount = FT_NEXT_USHORT( p );

    OTV_TRACE(( " (BaseScriptCount = %d)\n", BaseScriptCount ));

    OTV_LIMIT_CHECK( BaseScriptCount * 6 );

    /* BaseScriptRecord */
    for ( ; BaseScriptCount > 0; BaseScriptCount-- )
    {
      p += 4;       /* skip BaseScriptTag */

      /* BaseScript */
      otv_BaseScript_validate( table + FT_NEXT_USHORT( p ), otvalid );
    }

    OTV_EXIT;
  }
Esempio n. 14
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  otv_x_Ox( FT_Bytes       table,
            OTV_Validator  otvalid )
  {
    FT_Bytes           p = table;
    FT_UInt            Count;
    OTV_Validate_Func  func;


    OTV_ENTER;

    OTV_LIMIT_CHECK( 2 );
    Count = FT_NEXT_USHORT( p );

    OTV_TRACE(( " (Count = %d)\n", Count ));

    OTV_LIMIT_CHECK( Count * 2 );

    otvalid->nesting_level++;
    func = otvalid->func[otvalid->nesting_level];

    for ( ; Count > 0; Count-- )
      func( table + FT_NEXT_USHORT( p ), otvalid );

    otvalid->nesting_level--;

    OTV_EXIT;
  }
Esempio n. 15
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  static void
  otv_O_x_Ox( FT_Bytes       table,
              OTV_Validator  valid )
  {
    FT_Bytes           p = table;
    FT_Bytes           Coverage;
    FT_UInt            GlyphCount;
    OTV_Validate_Func  func;


    OTV_ENTER;

    OTV_LIMIT_CHECK( 4 );
    Coverage   = table + FT_NEXT_USHORT( p );
    GlyphCount = FT_NEXT_USHORT( p );

    OTV_TRACE(( " (GlyphCount = %d)\n", GlyphCount ));

    otv_Coverage_validate( Coverage, valid, GlyphCount );
    if ( GlyphCount != otv_Coverage_get_count( Coverage ) )
      FT_INVALID_DATA;

    OTV_LIMIT_CHECK( GlyphCount * 2 );

    valid->nesting_level++;
    func          = valid->func[valid->nesting_level];
    valid->extra1 = 0;

    for ( ; GlyphCount > 0; GlyphCount-- )
      func( table + FT_NEXT_USHORT( p ), valid );

    valid->nesting_level--;

    OTV_EXIT;
  }
Esempio n. 16
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  otv_u_x_Ox_y_Oy_z_Oz_p_sp( FT_Bytes       table,
                             OTV_Validator  otvalid )
  {
    FT_Bytes  p = table;
    FT_UInt   BacktrackGlyphCount, InputGlyphCount, LookaheadGlyphCount;
    FT_UInt   count1, count2;


    OTV_ENTER;

    p += 2;     /* skip Format */

    OTV_LIMIT_CHECK( 2 );
    BacktrackGlyphCount = FT_NEXT_USHORT( p );

    OTV_TRACE(( " (BacktrackGlyphCount = %d)\n", BacktrackGlyphCount ));

    OTV_LIMIT_CHECK( BacktrackGlyphCount * 2 + 2 );

    for ( ; BacktrackGlyphCount > 0; BacktrackGlyphCount-- )
      otv_Coverage_validate( table + FT_NEXT_USHORT( p ), otvalid, -1 );

    InputGlyphCount = FT_NEXT_USHORT( p );

    OTV_TRACE(( " (InputGlyphCount = %d)\n", InputGlyphCount ));

    OTV_LIMIT_CHECK( InputGlyphCount * 2 + 2 );

    for ( count1 = InputGlyphCount; count1 > 0; count1-- )
      otv_Coverage_validate( table + FT_NEXT_USHORT( p ), otvalid, -1 );

    LookaheadGlyphCount = FT_NEXT_USHORT( p );

    OTV_TRACE(( " (LookaheadGlyphCount = %d)\n", LookaheadGlyphCount ));

    OTV_LIMIT_CHECK( LookaheadGlyphCount * 2 + 2 );

    for ( ; LookaheadGlyphCount > 0; LookaheadGlyphCount-- )
      otv_Coverage_validate( table + FT_NEXT_USHORT( p ), otvalid, -1 );

    count2 = FT_NEXT_USHORT( p );

    OTV_TRACE(( " (Count = %d)\n", count2 ));

    OTV_LIMIT_CHECK( count2 * 4 );

    for ( ; count2 > 0; count2-- )
    {
      if ( FT_NEXT_USHORT( p ) >= InputGlyphCount )
        FT_INVALID_DATA;

      if ( FT_NEXT_USHORT( p ) >= otvalid->lookup_count )
        FT_INVALID_DATA;
    }

    OTV_EXIT;
  }
Esempio n. 17
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  static void
  otv_MinMax_validate( FT_Bytes       table,
                       OTV_Validator  otvalid )
  {
    FT_Bytes  p = table;
    FT_UInt   table_size;
    FT_UInt   FeatMinMaxCount;

    OTV_OPTIONAL_TABLE( MinCoord );
    OTV_OPTIONAL_TABLE( MaxCoord );


    OTV_NAME_ENTER( "MinMax" );

    OTV_LIMIT_CHECK( 6 );

    OTV_OPTIONAL_OFFSET( MinCoord );
    OTV_OPTIONAL_OFFSET( MaxCoord );
    FeatMinMaxCount = FT_NEXT_USHORT( p );

    OTV_TRACE(( " (FeatMinMaxCount = %d)\n", FeatMinMaxCount ));

    table_size = FeatMinMaxCount * 8 + 6;

    OTV_SIZE_CHECK( MinCoord );
    if ( MinCoord )
      otv_BaseCoord_validate( table + MinCoord, otvalid );

    OTV_SIZE_CHECK( MaxCoord );
    if ( MaxCoord )
      otv_BaseCoord_validate( table + MaxCoord, otvalid );

    OTV_LIMIT_CHECK( FeatMinMaxCount * 8 );

    /* FeatMinMaxRecord */
    for ( ; FeatMinMaxCount > 0; FeatMinMaxCount-- )
    {
      p += 4;                           /* skip FeatureTableTag */

      OTV_OPTIONAL_OFFSET( MinCoord );
      OTV_OPTIONAL_OFFSET( MaxCoord );

      OTV_SIZE_CHECK( MinCoord );
      if ( MinCoord )
        otv_BaseCoord_validate( table + MinCoord, otvalid );

      OTV_SIZE_CHECK( MaxCoord );
      if ( MaxCoord )
        otv_BaseCoord_validate( table + MaxCoord, otvalid );
    }

    OTV_EXIT;
  }
Esempio n. 18
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  otv_JSTF_validate( FT_Bytes      table,
                     FT_Bytes      gsub,
                     FT_Bytes      gpos,
                     FT_UInt       glyph_count,
                     FT_Validator  ftvalid )
  {
    OTV_ValidatorRec  otvalidrec;
    OTV_Validator     otvalid = &otvalidrec;
    FT_Bytes          p     = table;
    FT_UInt           JstfScriptCount;


    otvalid->root = ftvalid;


    FT_TRACE3(( "validating JSTF table\n" ));
    OTV_INIT;

    OTV_LIMIT_CHECK( 6 );

    if ( FT_NEXT_ULONG( p ) != 0x10000UL )      /* Version */
      FT_INVALID_FORMAT;

    JstfScriptCount = FT_NEXT_USHORT( p );

    FT_TRACE3(( " (JstfScriptCount = %d)\n", JstfScriptCount ));

    OTV_LIMIT_CHECK( JstfScriptCount * 6 );

    if ( gsub )
      otvalid->extra1 = otv_GSUBGPOS_get_Lookup_count( gsub );
    else
      otvalid->extra1 = 0;

    if ( gpos )
      otvalid->extra2 = otv_GSUBGPOS_get_Lookup_count( gpos );
    else
      otvalid->extra2 = 0;

    otvalid->glyph_count = glyph_count;

    /* JstfScriptRecord */
    for ( ; JstfScriptCount > 0; JstfScriptCount-- )
    {
      p += 4;       /* skip JstfScriptTag */

      /* JstfScript */
      otv_JstfScript_validate( table + FT_NEXT_USHORT( p ), otvalid );
    }

    FT_TRACE4(( "\n" ));
  }
Esempio n. 19
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  otv_x_ux_y_uy_z_uz_p_sp( FT_Bytes       table,
                           OTV_Validator  otvalid )
  {
    FT_Bytes  p = table;
    FT_UInt   BacktrackCount, InputCount, LookaheadCount;
    FT_UInt   Count;


    OTV_ENTER;

    OTV_LIMIT_CHECK( 2 );
    BacktrackCount = FT_NEXT_USHORT( p );

    OTV_TRACE(( " (BacktrackCount = %d)\n", BacktrackCount ));

    OTV_LIMIT_CHECK( BacktrackCount * 2 + 2 );
    p += BacktrackCount * 2;

    InputCount = FT_NEXT_USHORT( p );
    if ( InputCount == 0 )
      FT_INVALID_DATA;

    OTV_TRACE(( " (InputCount = %d)\n", InputCount ));

    OTV_LIMIT_CHECK( InputCount * 2 );
    p += ( InputCount - 1 ) * 2;

    LookaheadCount = FT_NEXT_USHORT( p );

    OTV_TRACE(( " (LookaheadCount = %d)\n", LookaheadCount ));

    OTV_LIMIT_CHECK( LookaheadCount * 2 + 2 );
    p += LookaheadCount * 2;

    Count = FT_NEXT_USHORT( p );

    OTV_TRACE(( " (Count = %d)\n", Count ));

    OTV_LIMIT_CHECK( Count * 4 );

    for ( ; Count > 0; Count-- )
    {
      if ( FT_NEXT_USHORT( p ) >= InputCount )
        FT_INVALID_DATA;

      if ( FT_NEXT_USHORT( p ) >= otvalid->extra1 )
        FT_INVALID_DATA;
    }

    OTV_EXIT;
  }
Esempio n. 20
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static void
otv_JstfScript_validate( FT_Bytes       table,
                         OTV_Validator  valid )
{
    FT_Bytes  p = table;
    FT_UInt   table_size;
    FT_UInt   JstfLangSysCount;

    OTV_OPTIONAL_TABLE( ExtGlyph );
    OTV_OPTIONAL_TABLE( DefJstfLangSys );


    OTV_NAME_ENTER( "JstfScript" );

    OTV_LIMIT_CHECK( 6 );
    OTV_OPTIONAL_OFFSET( ExtGlyph );
    OTV_OPTIONAL_OFFSET( DefJstfLangSys );
    JstfLangSysCount = FT_NEXT_USHORT( p );

    OTV_TRACE(( " (JstfLangSysCount = %d)\n", JstfLangSysCount ));

    table_size = JstfLangSysCount * 6 + 6;

    OTV_SIZE_CHECK( ExtGlyph );
    if ( ExtGlyph )
    {
        valid->extra1 = valid->glyph_count;
        OTV_NEST1( ExtenderGlyph );
        OTV_RUN( table + ExtGlyph, valid );
    }

    OTV_SIZE_CHECK( DefJstfLangSys );
    if ( DefJstfLangSys )
    {
        OTV_NEST2( JstfLangSys, JstfPriority );
        OTV_RUN( table + DefJstfLangSys, valid );
    }

    OTV_LIMIT_CHECK( 6 * JstfLangSysCount );

    /* JstfLangSysRecord */
    OTV_NEST2( JstfLangSys, JstfPriority );
    for ( ; JstfLangSysCount > 0; JstfLangSysCount-- )
    {
        p += 4;       /* skip JstfLangSysTag */

        OTV_RUN( table + FT_NEXT_USHORT( p ), valid );
    }

    OTV_EXIT;
}
Esempio n. 21
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  static void
  otv_MathVariants_validate( FT_Bytes       table,
                             OTV_Validator  valid )
  {
    FT_Bytes  p = table;
    FT_UInt   vcnt, hcnt, i, table_size;

    OTV_OPTIONAL_TABLE( VCoverage );
    OTV_OPTIONAL_TABLE( HCoverage );
    OTV_OPTIONAL_TABLE( Offset );


    OTV_NAME_ENTER( "MathVariants" );

    OTV_LIMIT_CHECK( 10 );

    p += 2;                       /* Skip the MinConnectorOverlap constant */
    OTV_OPTIONAL_OFFSET( VCoverage );
    OTV_OPTIONAL_OFFSET( HCoverage );
    vcnt = FT_NEXT_USHORT( p );
    hcnt = FT_NEXT_USHORT( p );

    OTV_LIMIT_CHECK( 2 * vcnt + 2 * hcnt );
    table_size = 10 + 2 * vcnt + 2 * hcnt;

    OTV_SIZE_CHECK( VCoverage );
    if ( VCoverage )
      otv_Coverage_validate( table + VCoverage, valid, vcnt );

    OTV_SIZE_CHECK( HCoverage );
    if ( HCoverage )
      otv_Coverage_validate( table + HCoverage, valid, hcnt );

    for ( i = 0; i < vcnt; ++i )
    {
      OTV_OPTIONAL_OFFSET( Offset );
      OTV_SIZE_CHECK( Offset );
      otv_MathGlyphConstruction_validate( table + Offset, valid );
    }

    for ( i = 0; i < hcnt; ++i )
    {
      OTV_OPTIONAL_OFFSET( Offset );
      OTV_SIZE_CHECK( Offset );
      otv_MathGlyphConstruction_validate( table + Offset, valid );
    }

    OTV_EXIT;
  }
Esempio n. 22
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  otv_u_O_O_O_O_x_Onx( FT_Bytes       table,
                       OTV_Validator  otvalid )
  {
    FT_Bytes           p = table;
    FT_UInt            Coverage;
    FT_UInt            BacktrackClassDef, InputClassDef, LookaheadClassDef;
    FT_UInt            ChainClassSetCount;
    OTV_Validate_Func  func;


    OTV_ENTER;

    p += 2;     /* skip Format */

    OTV_LIMIT_CHECK( 10 );
    Coverage           = FT_NEXT_USHORT( p );
    BacktrackClassDef  = FT_NEXT_USHORT( p );
    InputClassDef      = FT_NEXT_USHORT( p );
    LookaheadClassDef  = FT_NEXT_USHORT( p );
    ChainClassSetCount = FT_NEXT_USHORT( p );

    OTV_TRACE(( " (ChainClassSetCount = %d)\n", ChainClassSetCount ));

    otv_Coverage_validate( table + Coverage, otvalid, -1 );

    otv_ClassDef_validate( table + BacktrackClassDef,  otvalid );
    otv_ClassDef_validate( table + InputClassDef, otvalid );
    otv_ClassDef_validate( table + LookaheadClassDef, otvalid );

    OTV_LIMIT_CHECK( ChainClassSetCount * 2 );

    otvalid->nesting_level++;
    func          = otvalid->func[otvalid->nesting_level];
    otvalid->extra1 = otvalid->lookup_count;

    for ( ; ChainClassSetCount > 0; ChainClassSetCount-- )
    {
      FT_UInt  offset = FT_NEXT_USHORT( p );


      if ( offset )
        func( table + offset, otvalid );
    }

    otvalid->nesting_level--;

    OTV_EXIT;
  }
Esempio n. 23
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  static void
  otv_MathConstants_validate( FT_Bytes       table,
                              OTV_Validator  valid )
  {
    FT_Bytes  p = table;
    FT_UInt   i;
    FT_UInt   table_size;

    OTV_OPTIONAL_TABLE( DeviceTableOffset );


    OTV_NAME_ENTER( "MathConstants" );

    /* 56 constants, 51 have device tables */
    OTV_LIMIT_CHECK( 2 * ( 56 + 51 ) );
    table_size = 2 * ( 56 + 51 );

    p += 4 * 2;                 /* First 4 constants have no device tables */
    for ( i = 0; i < 51; ++i )
    {
      p += 2;                                            /* skip the value */
      OTV_OPTIONAL_OFFSET( DeviceTableOffset );
      OTV_SIZE_CHECK( DeviceTableOffset );
      if ( DeviceTableOffset )
        otv_Device_validate( table + DeviceTableOffset, valid );
    }

    OTV_EXIT;
  }
Esempio n. 24
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  otv_MATH_validate( FT_Bytes      table,
                     FT_UInt       glyph_count,
                     FT_Validator  ftvalid )
  {
    OTV_ValidatorRec  validrec;
    OTV_Validator     valid = &validrec;
    FT_Bytes          p     = table;
    FT_UInt           MathConstants, MathGlyphInfo, MathVariants;


    valid->root = ftvalid;

    FT_TRACE3(( "validating MATH table\n" ));
    OTV_INIT;

    OTV_LIMIT_CHECK( 10 );

    if ( FT_NEXT_ULONG( p ) != 0x10000UL )      /* Version */
      FT_INVALID_FORMAT;

    MathConstants = FT_NEXT_USHORT( p );
    MathGlyphInfo = FT_NEXT_USHORT( p );
    MathVariants  = FT_NEXT_USHORT( p );

    valid->glyph_count = glyph_count;

    otv_MathConstants_validate( table + MathConstants,
                                valid );
    otv_MathGlyphInfo_validate( table + MathGlyphInfo,
                                valid );
    otv_MathVariants_validate ( table + MathVariants,
                                valid );

    FT_TRACE4(( "\n" ));
  }
Esempio n. 25
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  static void
  otv_Axis_validate( FT_Bytes       table,
                     OTV_Validator  otvalid )
  {
    FT_Bytes  p = table;
    FT_UInt   table_size;

    OTV_OPTIONAL_TABLE( BaseTagList );


    OTV_NAME_ENTER( "Axis" );

    OTV_LIMIT_CHECK( 4 );
    OTV_OPTIONAL_OFFSET( BaseTagList );

    table_size = 4;

    OTV_SIZE_CHECK( BaseTagList );
    if ( BaseTagList )
      otv_BaseTagList_validate( table + BaseTagList, otvalid );

    /* BaseScriptList */
    otv_BaseScriptList_validate( table + FT_NEXT_USHORT( p ), otvalid );

    OTV_EXIT;
  }
Esempio n. 26
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  static void
  otv_MultipleSubst_validate( FT_Bytes       table,
                              OTV_Validator  valid )
  {
    FT_Bytes  p = table;
    FT_UInt   SubstFormat;


    OTV_NAME_ENTER( "MultipleSubst" );

    OTV_LIMIT_CHECK( 2 );
    SubstFormat = FT_NEXT_USHORT( p );

    OTV_TRACE(( " (format %d)\n", SubstFormat ));

    switch ( SubstFormat )
    {
    case 1:
      valid->extra1 = valid->glyph_count;
      OTV_NEST2( MultipleSubstFormat1, Sequence );
      OTV_RUN( table, valid );
      break;

    default:
      FT_INVALID_DATA;
    }

    OTV_EXIT;
  }
Esempio n. 27
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  static void
  otv_LigatureSubst_validate( FT_Bytes       table,
                              OTV_Validator  otvalid )
  {
    FT_Bytes  p = table;
    FT_UInt   SubstFormat;


    OTV_NAME_ENTER( "LigatureSubst" );

    OTV_LIMIT_CHECK( 2 );
    SubstFormat = FT_NEXT_USHORT( p );

    OTV_TRACE(( " (format %d)\n", SubstFormat ));

    switch ( SubstFormat )
    {
    case 1:
      OTV_NEST3( LigatureSubstFormat1, LigatureSet, Ligature );
      OTV_RUN( table, otvalid );
      break;

    default:
      FT_INVALID_FORMAT;
    }

    OTV_EXIT;
  }
Esempio n. 28
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  static void
  otv_AlternateSubst_validate( FT_Bytes       table,
                               OTV_Validator  otvalid )
  {
    FT_Bytes  p = table;
    FT_UInt   SubstFormat;


    OTV_NAME_ENTER( "AlternateSubst" );

    OTV_LIMIT_CHECK( 2 );
    SubstFormat = FT_NEXT_USHORT( p );

    OTV_TRACE(( " (format %d)\n", SubstFormat ));

    switch ( SubstFormat )
    {
    case 1:
      otvalid->extra1 = otvalid->glyph_count;
      OTV_NEST2( AlternateSubstFormat1, AlternateSet );
      OTV_RUN( table, otvalid );
      break;

    default:
      FT_INVALID_FORMAT;
    }

    OTV_EXIT;
  }
Esempio n. 29
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  static void
  otv_ExtensionSubst_validate( FT_Bytes       table,
                               OTV_Validator  otvalid )
  {
    FT_Bytes  p = table;
    FT_UInt   SubstFormat;


    OTV_NAME_ENTER( "ExtensionSubst" );

    OTV_LIMIT_CHECK( 2 );
    SubstFormat = FT_NEXT_USHORT( p );

    OTV_TRACE(( " (format %d)\n", SubstFormat ));

    switch ( SubstFormat )
    {
    case 1:     /* ExtensionSubstFormat1 */
      {
        FT_UInt            ExtensionLookupType;
        FT_ULong           ExtensionOffset;
        OTV_Validate_Func  validate;


        OTV_LIMIT_CHECK( 6 );
        ExtensionLookupType = FT_NEXT_USHORT( p );
        ExtensionOffset     = FT_NEXT_ULONG( p );

        if ( ExtensionLookupType == 0 ||
             ExtensionLookupType == 7 ||
             ExtensionLookupType > 8  )
          FT_INVALID_DATA;

        validate = otvalid->type_funcs[ExtensionLookupType - 1];
        validate( table + ExtensionOffset, otvalid );
      }
      break;

    default:
      FT_INVALID_FORMAT;
    }

    OTV_EXIT;
  }
Esempio n. 30
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  static void
  otv_BaseScript_validate( FT_Bytes       table,
                           OTV_Validator  otvalid )
  {
    FT_Bytes  p = table;
    FT_UInt   table_size;
    FT_UInt   BaseLangSysCount;

    OTV_OPTIONAL_TABLE( BaseValues    );
    OTV_OPTIONAL_TABLE( DefaultMinMax );


    OTV_NAME_ENTER( "BaseScript" );

    OTV_LIMIT_CHECK( 6 );
    OTV_OPTIONAL_OFFSET( BaseValues    );
    OTV_OPTIONAL_OFFSET( DefaultMinMax );
    BaseLangSysCount = FT_NEXT_USHORT( p );

    OTV_TRACE(( " (BaseLangSysCount = %d)\n", BaseLangSysCount ));

    table_size = BaseLangSysCount * 6 + 6;

    OTV_SIZE_CHECK( BaseValues );
    if ( BaseValues )
      otv_BaseValues_validate( table + BaseValues, otvalid );

    OTV_SIZE_CHECK( DefaultMinMax );
    if ( DefaultMinMax )
      otv_MinMax_validate( table + DefaultMinMax, otvalid );

    OTV_LIMIT_CHECK( BaseLangSysCount * 6 );

    /* BaseLangSysRecord */
    for ( ; BaseLangSysCount > 0; BaseLangSysCount-- )
    {
      p += 4;       /* skip BaseLangSysTag */

      otv_MinMax_validate( table + FT_NEXT_USHORT( p ), otvalid );
    }

    OTV_EXIT;
  }