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#include "otlgdef.h"
#include "otlcommn.h"
/************************************************************************/
/************************************************************************/
/***** *****/
/***** ATTACHMENTS LIST *****/
/***** *****/
/************************************************************************/
/************************************************************************/
static void
otl_attach_point_validate( OTL_Bytes table,
OTL_Validator valid )
{
OTL_Bytes p = table;
OTL_UInt count;
if ( p + 2 > valid->limit )
OTL_INVALID_TOO_SHORT;
count = OTL_NEXT_USHORT( p );
if ( table + count*2 > valid->limit )
OTL_INVALID_TOO_SHORT;
}
static void
otl_attach_list_validate( OTL_Bytes table,
OTL_Validator valid )
{
OTL_Bytes p = table;
OTL_Bytes coverage;
OTL_UInt count;
if ( p + 4 > valid->limit )
OTL_INVALID_TOO_SHORT;
coverage = table + OTL_NEXT_USHORT( p );
count = OTL_NEXT_USHORT( p );
otl_coverage_validate( coverage, valid );
if ( count != otl_coverage_get_count( coverage ) )
OTL_INVALID_DATA;
if ( p + count*2 > valid->limit )
OTL_INVALID_TOO_SHORT;
for ( ; count > 0; count-- )
otl_attach_point_validate( table + OTL_NEXT_USHORT( p ) );
}
/************************************************************************/
/************************************************************************/
/***** *****/
/***** LIGATURE CARETS *****/
/***** *****/
/************************************************************************/
/************************************************************************/
static void
otl_caret_value_validate( OTL_Bytes table,
OTL_Validator valid )
{
OTL_Bytes p = table;
if ( p + 4 > valid->limit )
OTL_INVALID_TOO_SHORT;
format = OTL_NEXT_USHORT( p );
switch ( format )
{
case 1:
case 2:
break;
case 3:
{
OTL_Bytes device;
p += 2;
if ( p + 2 > valid->limit )
OTL_INVALID_TOO_SHORT;
otl_device_table_validate( table + OTL_PEEK_USHORT( p ) );
}
break;
default:
OTL_INVALID_DATA;
}
}
static void
otl_ligature_glyph_validate( OTL_Bytes table,
OTL_Validator valid )
{
OTL_Bytes p = table;
OTL_UInt count;
if ( p + 2 > valid->limit )
OTL_INVALID_TOO_SHORT;
count = OTL_NEXT_USHORT( p );
if ( p + count*2 > valid->limit )
OTL_INVALID_TOO_SHORT;
for ( ; count > 0; count-- )
otl_caret_value_validate( table + OTL_NEXT_USHORT( p ) );
}
static void
otl_ligature_caret_list_validate( OTL_Bytes table,
OTL_Validator valid )
{
OTL_Bytes p = table;
OTL_Bytes coverage;
OTL_UInt count;
if ( p + 4 > valid->limit )
OTL_INVALID_TOO_SHORT;
coverage = table + OTL_NEXT_USHORT( p );
count = OTL_NEXT_USHORT( p );
otl_coverage_validate( coverage, valid );
if ( count != otl_coverage_get_count( coverage ) )
OTL_INVALID_DATA;
if ( p + count*2 > valid->limit )
OTL_INVALID_TOO_SHORT;
for ( ; count > 0; count-- )
otl_ligature_glyph_validate( table + OTL_NEXT_USHORT( p ) );
}
/************************************************************************/
/************************************************************************/
/***** *****/
/***** GDEF TABLE *****/
/***** *****/
/************************************************************************/
/************************************************************************/
OTL_APIDEF( void )
otl_gdef_validate( OTL_Bytes table,
OTL_Validator valid )
{
OTL_Bytes p = table;
if ( p + 12 > valid->limit )
OTL_INVALID_TOO_SHORT;
/* check format */
if ( OTL_NEXT_ULONG( p ) != 0x00010000UL )
OTL_INVALID_FORMAT;
/* validate class definition table */
otl_class_definition_validate( table + OTL_NEXT_USHORT( p ) );
/* validate attachment point list */
otl_attach_list_validate( table + OTL_NEXT_USHORT( p ) );
/* validate ligature caret list */
otl_ligature_caret_list_validate( table + OTL_NEXT_USHORT( p ) );
/* validate mark attach class */
otl_class_definition_validate( table + OTL_NEXT_USHORT( p ) );
}
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