C++ GXV_NAME_ENTER函数代码示例

  static void
  gxv_lcar_LookupValue_validate( FT_UShort            glyph,
                                 GXV_LookupValueDesc  value,
                                 GXV_Validator        valid )
  {
    FT_Bytes   p     = valid->root->base + value.u;
    FT_Bytes   limit = valid->root->limit;
    FT_UShort  count;
    FT_Short   partial;
    FT_UShort  i;


    GXV_NAME_ENTER( "element in lookupTable" );

    GXV_LIMIT_CHECK( 2 );
    count = FT_NEXT_USHORT( p );

    GXV_LIMIT_CHECK( 2 * count );
    for ( i = 0; i < count; i++ )
    {
      partial = FT_NEXT_SHORT( p );
      gxv_lcar_partial_validate( partial, glyph, valid );
    }

    GXV_EXIT;
  }

static void
gxv_mort_subtable_type1_substTable_validate( FT_Bytes       table,
        FT_Bytes       limit,
        GXV_Validator  valid )
{
    FT_Bytes   p = table;
    FT_UShort  num_gids = (FT_UShort)(
                              ((GXV_mort_subtable_type1_StateOptRec *)
                               (valid->statetable.optdata))->substitutionTable_length / 2 );
    FT_UShort  i;


    GXV_NAME_ENTER( "validating contents of substitutionTable" );
    for ( i = 0; i < num_gids ; i ++ )
    {
        FT_UShort  dst_gid;


        GXV_LIMIT_CHECK( 2 );
        dst_gid = FT_NEXT_USHORT( p );

        if ( dst_gid >= 0xFFFFU )
            continue;

        if ( dst_gid < valid->min_gid || valid->max_gid < dst_gid )
        {
            GXV_TRACE(( "substTable include a strange gid[%d]=%d >"
                        " out of define range (%d..%d)\n",
                        i, dst_gid, valid->min_gid, valid->max_gid ));
            GXV_SET_ERR_IF_PARANOID( FT_INVALID_GLYPH_ID );
        }
    }

    GXV_EXIT;
}

  gxv_mort_featurearray_validate( FT_Bytes       table,
                                  FT_Bytes       limit,
                                  FT_ULong       nFeatureFlags,
                                  GXV_Validator  valid )
  {
    FT_Bytes  p = table;
    FT_ULong  i;

    GXV_mort_featureRec  f = GXV_MORT_FEATURE_OFF;


    GXV_NAME_ENTER( "mort feature list" );
    for ( i = 0; i < nFeatureFlags; i++ )
    {
      GXV_LIMIT_CHECK( 2 + 2 + 4 + 4 );
      f.featureType    = FT_NEXT_USHORT( p );
      f.featureSetting = FT_NEXT_USHORT( p );
      f.enableFlags    = FT_NEXT_ULONG( p );
      f.disableFlags   = FT_NEXT_ULONG( p );

      gxv_mort_feature_validate( &f, valid );
    }

    if ( !IS_GXV_MORT_FEATURE_OFF( f ) )
      FT_INVALID_DATA;

    valid->subtable_length = p - table;
    GXV_EXIT;
  }

  static void
  gxv_just_justClassTable_validate ( FT_Bytes       table,
                                     FT_Bytes       limit,
                                     GXV_Validator  valid )
  {
    FT_Bytes   p = table;
    FT_UShort  length;
    FT_UShort  coverage;
    FT_ULong   subFeatureFlags;


    GXV_NAME_ENTER( "just justClassTable" );

    GXV_LIMIT_CHECK( 2 + 2 + 4 );
    length          = FT_NEXT_USHORT( p );
    coverage        = FT_NEXT_USHORT( p );
    subFeatureFlags = FT_NEXT_ULONG( p );

    GXV_TRACE(( "  justClassTable: coverage = 0x%04x (%s)",
                coverage,
                ( 0x4000 & coverage ) == 0 ? "ascending" : "descending" ));

    valid->statetable.optdata               = NULL;
    valid->statetable.optdata_load_func     = NULL;
    valid->statetable.subtable_setup_func   = NULL;
    valid->statetable.entry_glyphoffset_fmt = GXV_GLYPHOFFSET_NONE;
    valid->statetable.entry_validate_func   =
      gxv_just_classTable_entry_validate;

    gxv_StateTable_validate( p, table + length, valid );

    /* subtable_length is set by gxv_LookupTable_validate() */

    GXV_EXIT;
  }

  static void
  gxv_kern_subtable_fmt0_validate( FT_Bytes       table,
                                   FT_Bytes       limit,
                                   GXV_Validator  gxvalid )
  {
    FT_Bytes   p = table + GXV_KERN_SUBTABLE_HEADER_SIZE;

    FT_UShort  nPairs;
    FT_UShort  unitSize;


    GXV_NAME_ENTER( "kern subtable format 0" );

    unitSize = 2 + 2 + 2;
    nPairs   = 0;

    /* nPairs, searchRange, entrySelector, rangeShift */
    GXV_LIMIT_CHECK( 2 + 2 + 2 + 2 );
    gxv_BinSrchHeader_validate( p, limit, &unitSize, &nPairs, gxvalid );
    p += 2 + 2 + 2 + 2;

    gxv_kern_subtable_fmt0_pairs_validate( p, limit, nPairs, gxvalid );

    GXV_EXIT;
  }

  static void
  gxv_kern_subtable_fmt2_clstbl_validate( FT_Bytes            table,
                                          FT_Bytes            limit,
                                          GXV_kern_ClassSpec  spec,
                                          GXV_Validator       gxvalid )
  {
    const FT_String*  tag    = GXV_KERN_FMT2_DATA( class_tag[spec] );
    GXV_odtect_Range  odtect = GXV_KERN_FMT2_DATA( odtect );

    FT_Bytes   p = table;
    FT_UShort  firstGlyph;
    FT_UShort  nGlyphs;


    GXV_NAME_ENTER( "kern format 2 classTable" );

    GXV_LIMIT_CHECK( 2 + 2 );
    firstGlyph = FT_NEXT_USHORT( p );
    nGlyphs    = FT_NEXT_USHORT( p );
    GXV_TRACE(( " %s firstGlyph=%d, nGlyphs=%d\n",
                tag, firstGlyph, nGlyphs ));

    gxv_glyphid_validate( firstGlyph, gxvalid );
    gxv_glyphid_validate( (FT_UShort)( firstGlyph + nGlyphs - 1 ), gxvalid );

    gxv_array_getlimits_ushort( p, p + ( 2 * nGlyphs ),
                                &( GXV_KERN_FMT2_DATA( offset_min[spec] ) ),
                                &( GXV_KERN_FMT2_DATA( offset_max[spec] ) ),
                                gxvalid );

    gxv_odtect_add_range( table, 2 * nGlyphs, tag, odtect );

    GXV_EXIT;
  }

  gxv_mort_subtable_type2_validate(FT_Bytes       table,
                                    FT_Bytes       limit,
                                    GXV_Validator  gxvalid)
  {
    FT_Bytes  p = table;

    GXV_mort_subtable_type2_StateOptRec  lig_rec;


    GXV_NAME_ENTER("mort chain subtable type2 (Ligature Substitution)");

    GXV_LIMIT_CHECK(GXV_MORT_SUBTABLE_TYPE2_HEADER_SIZE);

    gxvalid->statetable.optdata =
      &lig_rec;
    gxvalid->statetable.optdata_load_func =
      gxv_mort_subtable_type2_opttable_load;
    gxvalid->statetable.subtable_setup_func =
      gxv_mort_subtable_type2_subtable_setup;
    gxvalid->statetable.entry_glyphoffset_fmt =
      GXV_GLYPHOFFSET_NONE;
    gxvalid->statetable.entry_validate_func =
      gxv_mort_subtable_type2_entry_validate;

    gxv_StateTable_validate(p, limit, gxvalid);

    p += gxvalid->subtable_length;
    gxv_mort_subtable_type2_ligatureTable_validate(table, gxvalid);

    gxvalid->subtable_length = (FT_ULong)(p - table);

    GXV_EXIT;
  }

  static void
  gxv_kern_subtable_fmt1_validate( FT_Bytes       table,
                                   FT_Bytes       limit,
                                   GXV_Validator  gxvalid )
  {
    FT_Bytes                   p = table;
    GXV_kern_fmt1_StateOptRec  vt_rec;


    GXV_NAME_ENTER( "kern subtable format 1" );

    gxvalid->statetable.optdata =
      &vt_rec;
    gxvalid->statetable.optdata_load_func =
      gxv_kern_subtable_fmt1_valueTable_load;
    gxvalid->statetable.subtable_setup_func =
      gxv_kern_subtable_fmt1_subtable_setup;
    gxvalid->statetable.entry_glyphoffset_fmt =
      GXV_GLYPHOFFSET_NONE;
    gxvalid->statetable.entry_validate_func =
      gxv_kern_subtable_fmt1_entry_validate;

    gxv_StateTable_validate( p, limit, gxvalid );

    GXV_EXIT;
  }

  static void
  gxv_feat_setting_validate( FT_Bytes       table,
                             FT_Bytes       limit,
                             FT_Bool        exclusive,
                             GXV_Validator  gxvalid )
  {
    FT_Bytes   p = table;
    FT_UShort  setting;


    GXV_NAME_ENTER( "setting" );

    GXV_LIMIT_CHECK( 2 );

    setting = FT_NEXT_USHORT( p );

    /* If we have exclusive setting, the setting should be odd. */
    if ( exclusive && ( setting & 1 ) == 0 )
      FT_INVALID_DATA;

    gxv_feat_name_index_validate( p, limit, gxvalid );

    GXV_FEAT_DATA( setting ) = setting;

    GXV_EXIT;
  }

  static void
  gxv_mort_chain_validate( FT_Bytes       table,
                           FT_Bytes       limit,
                           GXV_Validator  valid )
  {
    FT_Bytes   p = table;
    FT_ULong   defaultFlags;
    FT_ULong   chainLength;
    FT_UShort  nFeatureFlags;
    FT_UShort  nSubtables;


    GXV_NAME_ENTER( "mort chain header" );

    GXV_LIMIT_CHECK( 4 + 4 + 2 + 2 );
    defaultFlags  = FT_NEXT_ULONG( p );
    chainLength   = FT_NEXT_ULONG( p );
    nFeatureFlags = FT_NEXT_USHORT( p );
    nSubtables    = FT_NEXT_USHORT( p );

    gxv_mort_featurearray_validate( p, table + chainLength,
                                    nFeatureFlags, valid );
    p += valid->subtable_length;
    gxv_mort_subtables_validate( p, table + chainLength, nSubtables, valid );
    valid->subtable_length = chainLength;

    GXV_EXIT;
  }

  static void
  gxv_mort_subtable_type2_ligatureTable_validate(FT_Bytes       table,
                                                  GXV_Validator  gxvalid)
  {
    GXV_mort_subtable_type2_StateOptRecData  optdata =
      (GXV_mort_subtable_type2_StateOptRecData)gxvalid->statetable.optdata;

    FT_Bytes p     = table + optdata->ligatureTable;
    FT_Bytes limit = table + optdata->ligatureTable
                           + optdata->ligatureTable_length;


    GXV_NAME_ENTER("mort chain subtable type2 - substitutionTable");
    if (0 != optdata->ligatureTable)
    {
      /* Apple does not give specification of ligatureTable format */
      while (p < limit)
      {
        FT_UShort  lig_gid;


        GXV_LIMIT_CHECK(2);
        lig_gid = FT_NEXT_USHORT(p);

        if (gxvalid->face->num_glyphs < lig_gid)
          GXV_SET_ERR_IF_PARANOID(FT_INVALID_GLYPH_ID);
      }
    }
    GXV_EXIT;
  }

  gxv_morx_subtable_type1_validate( FT_Bytes       table,
                                    FT_Bytes       limit,
                                    GXV_Validator  valid )
  {
    FT_Bytes  p = table;

    GXV_morx_subtable_type1_StateOptRec  st_rec;


    GXV_NAME_ENTER( "morx chain subtable type1 (Contextual Glyph Subst)" );

    GXV_LIMIT_CHECK( GXV_MORX_SUBTABLE_TYPE1_HEADER_SIZE );

    st_rec.substitutionTable_num_lookupTables = 0;

    valid->xstatetable.optdata =
      &st_rec;
    valid->xstatetable.optdata_load_func =
      gxv_morx_subtable_type1_substitutionTable_load;
    valid->xstatetable.subtable_setup_func =
      gxv_morx_subtable_type1_subtable_setup;
    valid->xstatetable.entry_glyphoffset_fmt =
      GXV_GLYPHOFFSET_ULONG;
    valid->xstatetable.entry_validate_func =
      gxv_morx_subtable_type1_entry_validate;

    gxv_XStateTable_validate( p, limit, valid );

    gxv_morx_subtable_type1_substitutionTable_validate(
      table + st_rec.substitutionTable,
      table + st_rec.substitutionTable + st_rec.substitutionTable_length,
      valid );

    GXV_EXIT;
  }

  static void
  gxv_just_widthDeltaClusters_validate( FT_Bytes       table,
                                        FT_Bytes       limit,
                                        GXV_Validator  valid )
  {
    FT_Bytes  p         = table ;
    FT_Bytes  wdc_end   = table + GXV_JUST_DATA( wdc_offset_max );
    FT_UInt   i;


    GXV_NAME_ENTER( "just justDeltaClusters" );

    if ( limit <= wdc_end )
      FT_INVALID_OFFSET;

    for ( i = 0; p <= wdc_end; i++ )
    {
      gxv_just_wdc_entry_validate( p, limit, valid );
      p += valid->subtable_length;
    }

    valid->subtable_length = p - table;

    GXV_EXIT;
  }

  gxv_mort_subtable_type5_validate( FT_Bytes       table,
                                    FT_Bytes       limit,
                                    GXV_Validator  gxvalid )
  {
    FT_Bytes  p = table;

    GXV_mort_subtable_type5_StateOptRec      et_rec;
    GXV_mort_subtable_type5_StateOptRecData  et = &et_rec;


    GXV_NAME_ENTER( "mort chain subtable type5 (Glyph Insertion)" );

    GXV_LIMIT_CHECK( GXV_MORT_SUBTABLE_TYPE5_HEADER_SIZE );

    gxvalid->statetable.optdata =
      et;
    gxvalid->statetable.optdata_load_func =
      NULL;
    gxvalid->statetable.subtable_setup_func =
      gxv_mort_subtable_type5_subtable_setup;
    gxvalid->statetable.entry_glyphoffset_fmt =
      GXV_GLYPHOFFSET_ULONG;
    gxvalid->statetable.entry_validate_func =
      gxv_mort_subtable_type5_entry_validate;

    gxv_StateTable_validate( p, limit, gxvalid );

    GXV_EXIT;
  }

  static void
  gxv_morx_chain_validate( FT_Bytes       table,
                           FT_Bytes       limit,
                           GXV_Validator  valid )
  {
    FT_Bytes  p = table;
    FT_ULong  defaultFlags;
    FT_ULong  chainLength;
    FT_ULong  nFeatureFlags;
    FT_ULong  nSubtables;


    GXV_NAME_ENTER( "morx chain header" );

    GXV_LIMIT_CHECK( 4 + 4 + 4 + 4 );
    defaultFlags  = FT_NEXT_ULONG( p );
    chainLength   = FT_NEXT_ULONG( p );
    nFeatureFlags = FT_NEXT_ULONG( p );
    nSubtables    = FT_NEXT_ULONG( p );

    /* feature-array of morx is same with that of mort */
    gxv_mort_featurearray_validate( p, limit, nFeatureFlags, valid );
    p += valid->subtable_length;

    if ( nSubtables >= 0x10000L )
      FT_INVALID_DATA;

    gxv_morx_subtables_validate( p, table + chainLength,
                                 (FT_UShort)nSubtables, valid );

    valid->subtable_length = chainLength;

    GXV_EXIT;
  }