/*
* TODO: length should be limit?
**/
static void
gxv_morx_subtable_type1_substitutionTable_validate( FT_Bytes table,
FT_Bytes limit,
GXV_Validator valid )
{
FT_Bytes p = table;
FT_UShort i;
GXV_morx_subtable_type1_StateOptRecData optdata =
(GXV_morx_subtable_type1_StateOptRecData)valid->xstatetable.optdata;
/* TODO: calculate offset/length for each lookupTables */
valid->lookupval_sign = GXV_LOOKUPVALUE_UNSIGNED;
valid->lookupval_func = gxv_morx_subtable_type1_LookupValue_validate;
valid->lookupfmt4_trans = gxv_morx_subtable_type1_LookupFmt4_transit;
for ( i = 0; i < optdata->substitutionTable_num_lookupTables; i++ )
{
FT_ULong offset;
GXV_LIMIT_CHECK( 4 );
offset = FT_NEXT_ULONG( p );
gxv_LookupTable_validate( table + offset, limit, valid );
}
/* TODO: overlapping of lookupTables in substitutionTable */
}
gxv_opbd_validate( FT_Bytes table,
FT_Face face,
FT_Validator ftvalid )
{
GXV_ValidatorRec gxvalidrec;
GXV_Validator gxvalid = &gxvalidrec;
GXV_opbd_DataRec opbdrec;
GXV_opbd_Data opbd = &opbdrec;
FT_Bytes p = table;
FT_Bytes limit = 0;
FT_ULong version;
gxvalid->root = ftvalid;
gxvalid->table_data = opbd;
gxvalid->face = face;
FT_TRACE3(( "validating `opbd' table\n" ));
GXV_INIT;
GXV_OPBD_DATA( valueOffset_min ) = 0xFFFFU;
GXV_LIMIT_CHECK( 4 + 2 );
version = FT_NEXT_ULONG( p );
GXV_OPBD_DATA( format ) = FT_NEXT_USHORT( p );
/* only 0x00010000 is defined (1996) */
GXV_TRACE(( "(version=0x%08x)\n", version ));
if ( 0x00010000UL != version )
FT_INVALID_FORMAT;
/* only values 0 and 1 are defined (1996) */
GXV_TRACE(( "(format=0x%04x)\n", GXV_OPBD_DATA( format ) ));
if ( 0x0001 < GXV_OPBD_DATA( format ) )
FT_INVALID_FORMAT;
gxvalid->lookupval_sign = GXV_LOOKUPVALUE_UNSIGNED;
gxvalid->lookupval_func = gxv_opbd_LookupValue_validate;
gxvalid->lookupfmt4_trans = gxv_opbd_LookupFmt4_transit;
gxv_LookupTable_validate( p, limit, gxvalid );
p += gxvalid->subtable_length;
if ( p > table + GXV_OPBD_DATA( valueOffset_min ) )
{
GXV_TRACE((
"found overlap between LookupTable and opbd_value array\n" ));
FT_INVALID_OFFSET;
}
FT_TRACE4(( "\n" ));
}
gxv_mort_subtable_type4_validate( FT_Bytes table,
FT_Bytes limit,
GXV_Validator gxvalid )
{
FT_Bytes p = table;
GXV_NAME_ENTER( "mort chain subtable type4 "
"(Non-Contextual Glyph Substitution)" );
gxvalid->lookupval_sign = GXV_LOOKUPVALUE_UNSIGNED;
gxvalid->lookupval_func = gxv_mort_subtable_type4_lookupval_validate;
gxvalid->lookupfmt4_trans = gxv_mort_subtable_type4_lookupfmt4_transit;
gxv_LookupTable_validate( p, limit, gxvalid );
GXV_EXIT;
}
static void
gxv_just_justData_lookuptable_validate( FT_Bytes table,
FT_Bytes limit,
GXV_Validator valid )
{
FT_Bytes p = table;
GXV_JUST_DATA( wdc_offset_max ) = 0x0000;
GXV_JUST_DATA( wdc_offset_min ) = 0xFFFFU;
valid->lookupval_sign = GXV_LOOKUPVALUE_UNSIGNED;
valid->lookupval_func = gxv_just_wdcTable_LookupValue_validate;
gxv_LookupTable_validate( p, limit, valid );
/* subtable_length is set by gxv_LookupTable_validate() */
GXV_EXIT;
}
static void
gxv_just_pcLookupTable_validate( FT_Bytes table,
FT_Bytes limit,
GXV_Validator gxvalid )
{
FT_Bytes p = table;
GXV_NAME_ENTER( "just pcLookupTable" );
GXV_JUST_DATA( pc_offset_max ) = 0x0000;
GXV_JUST_DATA( pc_offset_min ) = 0xFFFFU;
gxvalid->lookupval_sign = GXV_LOOKUPVALUE_UNSIGNED;
gxvalid->lookupval_func = gxv_just_pcTable_LookupValue_entry_validate;
gxv_LookupTable_validate( p, limit, gxvalid );
/* subtable_length is set by gxv_LookupTable_validate() */
GXV_EXIT;
}
gxv_lcar_validate( FT_Bytes table,
FT_Face face,
FT_Validator ftvalid )
{
FT_Bytes p = table;
FT_Bytes limit = 0;
GXV_ValidatorRec validrec;
GXV_Validator valid = &validrec;
GXV_lcar_DataRec lcarrec;
GXV_lcar_Data lcar = &lcarrec;
FT_Fixed version;
valid->root = ftvalid;
valid->table_data = lcar;
valid->face = face;
FT_TRACE3(( "validating `lcar' table\n" ));
GXV_INIT;
GXV_LIMIT_CHECK( 4 + 2 );
version = FT_NEXT_ULONG( p );
GXV_LCAR_DATA( format ) = FT_NEXT_USHORT( p );
if ( version != 0x00010000UL)
FT_INVALID_FORMAT;
if ( GXV_LCAR_DATA( format ) > 1 )
FT_INVALID_FORMAT;
valid->lookupval_sign = GXV_LOOKUPVALUE_UNSIGNED;
valid->lookupval_func = gxv_lcar_LookupValue_validate;
valid->lookupfmt4_trans = gxv_lcar_LookupFmt4_transit;
gxv_LookupTable_validate( p, limit, valid );
FT_TRACE4(( "\n" ));
}
static void
gxv_bsln_parts_fmt3_validate( FT_Bytes tables,
FT_Bytes limit,
GXV_Validator valid)
{
FT_Bytes p = tables;
GXV_NAME_ENTER( "parts format 3" );
/* stdGlyph + ctlPoints */
gxv_bsln_parts_fmt2_validate( p, limit, valid );
/* mappingData */
valid->lookupval_sign = GXV_LOOKUPVALUE_UNSIGNED;
valid->lookupval_func = gxv_bsln_LookupValue_validate;
valid->lookupfmt4_trans = gxv_bsln_LookupFmt4_transit;
gxv_LookupTable_validate( p + ( 2 + 2 * GXV_BSLN_VALUE_COUNT ),
limit,
valid );
GXV_EXIT;
}
static void
gxv_bsln_parts_fmt1_validate( FT_Bytes tables,
FT_Bytes limit,
GXV_Validator gxvalid )
{
FT_Bytes p = tables;
GXV_NAME_ENTER( "parts format 1" );
/* deltas */
gxv_bsln_parts_fmt0_validate( p, limit, gxvalid );
/* mappingData */
gxvalid->lookupval_sign = GXV_LOOKUPVALUE_UNSIGNED;
gxvalid->lookupval_func = gxv_bsln_LookupValue_validate;
gxvalid->lookupfmt4_trans = gxv_bsln_LookupFmt4_transit;
gxv_LookupTable_validate( p + 2 * GXV_BSLN_VALUE_COUNT,
limit,
gxvalid );
GXV_EXIT;
}