diff options
Diffstat (limited to 'nx-X11/extras/freetype2/src/otlayout/otlgdef.c')
| -rw-r--r-- | nx-X11/extras/freetype2/src/otlayout/otlgdef.c | 175 |
1 files changed, 175 insertions, 0 deletions
diff --git a/nx-X11/extras/freetype2/src/otlayout/otlgdef.c b/nx-X11/extras/freetype2/src/otlayout/otlgdef.c new file mode 100644 index 000000000..ff1c2a1e8 --- /dev/null +++ b/nx-X11/extras/freetype2/src/otlayout/otlgdef.c @@ -0,0 +1,175 @@ +#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 ) ); + } + |