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;
}
static void
otv_MathKern_validate( FT_Bytes table,
OTV_Validator valid )
{
FT_Bytes p = table;
FT_UInt i, cnt, table_size;
OTV_OPTIONAL_TABLE( DeviceTableOffset );
/* OTV_NAME_ENTER( "MathKern" );*/
OTV_LIMIT_CHECK( 2 );
cnt = FT_NEXT_USHORT( p );
OTV_LIMIT_CHECK( 4 * cnt + 2 );
table_size = 4 + 4 * cnt;
/* Heights */
for ( i = 0; i < cnt; ++i )
{
p += 2; /* Skip the value */
OTV_OPTIONAL_OFFSET( DeviceTableOffset );
OTV_SIZE_CHECK( DeviceTableOffset );
if ( DeviceTableOffset )
otv_Device_validate( table + DeviceTableOffset, valid );
}
/* One more Kerning value */
for ( i = 0; i < cnt + 1; ++i )
{
p += 2; /* Skip the value */
OTV_OPTIONAL_OFFSET( DeviceTableOffset );
OTV_SIZE_CHECK( DeviceTableOffset );
if ( DeviceTableOffset )
otv_Device_validate( table + DeviceTableOffset, valid );
}
OTV_EXIT;
}
static void
otv_CaretValue_validate( FT_Bytes table,
OTV_Validator valid )
{
FT_Bytes p = table;
FT_UInt CaretValueFormat;
OTV_ENTER;
OTV_LIMIT_CHECK( 4 );
CaretValueFormat = FT_NEXT_USHORT( p );
OTV_TRACE(( " (format = %d)\n", CaretValueFormat ));
switch ( CaretValueFormat )
{
case 1: /* CaretValueFormat1 */
/* skip Coordinate, no test */
break;
case 2: /* CaretValueFormat2 */
/* skip CaretValuePoint, no test */
break;
case 3: /* CaretValueFormat3 */
p += 2; /* skip Coordinate */
OTV_LIMIT_CHECK( 2 );
/* DeviceTable */
otv_Device_validate( table + FT_NEXT_USHORT( p ), valid );
break;
default:
FT_INVALID_FORMAT;
}
OTV_EXIT;
}
static void
otv_GlyphAssembly_validate( FT_Bytes table,
OTV_Validator valid )
{
FT_Bytes p = table;
FT_UInt pcnt, table_size;
FT_UInt i;
OTV_OPTIONAL_TABLE( DeviceTableOffset );
/* OTV_NAME_ENTER( "GlyphAssembly" ); */
OTV_LIMIT_CHECK( 6 );
p += 2; /* Skip the Italics Correction value */
OTV_OPTIONAL_OFFSET( DeviceTableOffset );
pcnt = FT_NEXT_USHORT( p );
OTV_LIMIT_CHECK( 8 * pcnt );
table_size = 6 + 8 * pcnt;
OTV_SIZE_CHECK( DeviceTableOffset );
if ( DeviceTableOffset )
otv_Device_validate( table + DeviceTableOffset, valid );
for ( i = 0; i < pcnt; ++i )
{
FT_UInt gid;
gid = FT_NEXT_USHORT( p );
if ( gid >= valid->glyph_count )
FT_INVALID_GLYPH_ID;
p += 2*4; /* skip the Start, End, Full, and Flags fields */
}
/* OTV_EXIT; */
}
static void
otv_MathItalicsCorrectionInfo_validate( FT_Bytes table,
OTV_Validator otvalid,
FT_Int isItalic )
{
FT_Bytes p = table;
FT_UInt i, cnt, table_size;
OTV_OPTIONAL_TABLE( Coverage );
OTV_OPTIONAL_TABLE( DeviceTableOffset );
FT_UNUSED( isItalic ); /* only used if tracing is active */
OTV_NAME_ENTER( isItalic ? "MathItalicsCorrectionInfo"
: "MathTopAccentAttachment" );
OTV_LIMIT_CHECK( 4 );
OTV_OPTIONAL_OFFSET( Coverage );
cnt = FT_NEXT_USHORT( p );
OTV_LIMIT_CHECK( 4 * cnt );
table_size = 4 + 4 * cnt;
OTV_SIZE_CHECK( Coverage );
otv_Coverage_validate( table + Coverage, otvalid, (FT_Int)cnt );
for ( i = 0; i < cnt; ++i )
{
p += 2; /* Skip the value */
OTV_OPTIONAL_OFFSET( DeviceTableOffset );
OTV_SIZE_CHECK( DeviceTableOffset );
if ( DeviceTableOffset )
otv_Device_validate( table + DeviceTableOffset, otvalid );
}
OTV_EXIT;
}
static void
otv_BaseCoord_validate( FT_Bytes table,
OTV_Validator otvalid )
{
FT_Bytes p = table;
FT_UInt BaseCoordFormat;
OTV_NAME_ENTER( "BaseCoord" );
OTV_LIMIT_CHECK( 4 );
BaseCoordFormat = FT_NEXT_USHORT( p );
p += 2; /* skip Coordinate */
OTV_TRACE(( " (format %d)\n", BaseCoordFormat ));
switch ( BaseCoordFormat )
{
case 1: /* BaseCoordFormat1 */
break;
case 2: /* BaseCoordFormat2 */
OTV_LIMIT_CHECK( 4 ); /* ReferenceGlyph, BaseCoordPoint */
break;
case 3: /* BaseCoordFormat3 */
OTV_LIMIT_CHECK( 2 );
/* DeviceTable */
otv_Device_validate( table + FT_NEXT_USHORT( p ), otvalid );
break;
default:
FT_INVALID_FORMAT;
}
OTV_EXIT;
}
