--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/misc/libfreetype/src/otvalid/otvgdef.c Mon Apr 25 01:46:54 2011 +0200
@@ -0,0 +1,224 @@
+/***************************************************************************/
+/* */
+/* otvgdef.c */
+/* */
+/* OpenType GDEF table validation (body). */
+/* */
+/* Copyright 2004, 2005, 2007 by */
+/* David Turner, Robert Wilhelm, and Werner Lemberg. */
+/* */
+/* This file is part of the FreeType project, and may only be used, */
+/* modified, and distributed under the terms of the FreeType project */
+/* license, LICENSE.TXT. By continuing to use, modify, or distribute */
+/* this file you indicate that you have read the license and */
+/* understand and accept it fully. */
+/* */
+/***************************************************************************/
+
+
+#include "otvalid.h"
+#include "otvcommn.h"
+
+
+ /*************************************************************************/
+ /* */
+ /* The macro FT_COMPONENT is used in trace mode. It is an implicit */
+ /* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */
+ /* messages during execution. */
+ /* */
+#undef FT_COMPONENT
+#define FT_COMPONENT trace_otvgdef
+
+
+ /*************************************************************************/
+ /*************************************************************************/
+ /***** *****/
+ /***** UTILITY FUNCTIONS *****/
+ /***** *****/
+ /*************************************************************************/
+ /*************************************************************************/
+
+#define AttachListFunc otv_O_x_Ox
+#define LigCaretListFunc otv_O_x_Ox
+
+ /* sets valid->extra1 (0) */
+
+ static void
+ otv_O_x_Ox( FT_Bytes table,
+ OTV_Validator valid )
+ {
+ FT_Bytes p = table;
+ FT_Bytes Coverage;
+ FT_UInt GlyphCount;
+ OTV_Validate_Func func;
+
+
+ OTV_ENTER;
+
+ OTV_LIMIT_CHECK( 4 );
+ Coverage = table + FT_NEXT_USHORT( p );
+ GlyphCount = FT_NEXT_USHORT( p );
+
+ OTV_TRACE(( " (GlyphCount = %d)\n", GlyphCount ));
+
+ otv_Coverage_validate( Coverage, valid, GlyphCount );
+ if ( GlyphCount != otv_Coverage_get_count( Coverage ) )
+ FT_INVALID_DATA;
+
+ OTV_LIMIT_CHECK( GlyphCount * 2 );
+
+ valid->nesting_level++;
+ func = valid->func[valid->nesting_level];
+ valid->extra1 = 0;
+
+ for ( ; GlyphCount > 0; GlyphCount-- )
+ func( table + FT_NEXT_USHORT( p ), valid );
+
+ valid->nesting_level--;
+
+ OTV_EXIT;
+ }
+
+
+ /*************************************************************************/
+ /*************************************************************************/
+ /***** *****/
+ /***** LIGATURE CARETS *****/
+ /***** *****/
+ /*************************************************************************/
+ /*************************************************************************/
+
+#define CaretValueFunc otv_CaretValue_validate
+
+ 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;
+ }
+
+
+ /*************************************************************************/
+ /*************************************************************************/
+ /***** *****/
+ /***** GDEF TABLE *****/
+ /***** *****/
+ /*************************************************************************/
+ /*************************************************************************/
+
+ /* sets valid->glyph_count */
+
+ FT_LOCAL_DEF( void )
+ otv_GDEF_validate( FT_Bytes table,
+ FT_Bytes gsub,
+ FT_Bytes gpos,
+ FT_UInt glyph_count,
+ FT_Validator ftvalid )
+ {
+ OTV_ValidatorRec validrec;
+ OTV_Validator valid = &validrec;
+ FT_Bytes p = table;
+ FT_UInt table_size;
+ FT_Bool need_MarkAttachClassDef;
+
+ OTV_OPTIONAL_TABLE( GlyphClassDef );
+ OTV_OPTIONAL_TABLE( AttachListOffset );
+ OTV_OPTIONAL_TABLE( LigCaretListOffset );
+ OTV_OPTIONAL_TABLE( MarkAttachClassDef );
+
+
+ valid->root = ftvalid;
+
+ FT_TRACE3(( "validating GDEF table\n" ));
+ OTV_INIT;
+
+ OTV_LIMIT_CHECK( 12 );
+
+ if ( FT_NEXT_ULONG( p ) != 0x10000UL ) /* Version */
+ FT_INVALID_FORMAT;
+
+ /* MarkAttachClassDef has been added to the OpenType */
+ /* specification without increasing GDEF's version, */
+ /* so we use this ugly hack to find out whether the */
+ /* table is needed actually. */
+
+ need_MarkAttachClassDef = FT_BOOL(
+ otv_GSUBGPOS_have_MarkAttachmentType_flag( gsub ) ||
+ otv_GSUBGPOS_have_MarkAttachmentType_flag( gpos ) );
+
+ if ( need_MarkAttachClassDef )
+ table_size = 12; /* OpenType >= 1.2 */
+ else
+ table_size = 10; /* OpenType < 1.2 */
+
+ valid->glyph_count = glyph_count;
+
+ OTV_OPTIONAL_OFFSET( GlyphClassDef );
+ OTV_SIZE_CHECK( GlyphClassDef );
+ if ( GlyphClassDef )
+ otv_ClassDef_validate( table + GlyphClassDef, valid );
+
+ OTV_OPTIONAL_OFFSET( AttachListOffset );
+ OTV_SIZE_CHECK( AttachListOffset );
+ if ( AttachListOffset )
+ {
+ OTV_NEST2( AttachList, AttachPoint );
+ OTV_RUN( table + AttachListOffset, valid );
+ }
+
+ OTV_OPTIONAL_OFFSET( LigCaretListOffset );
+ OTV_SIZE_CHECK( LigCaretListOffset );
+ if ( LigCaretListOffset )
+ {
+ OTV_NEST3( LigCaretList, LigGlyph, CaretValue );
+ OTV_RUN( table + LigCaretListOffset, valid );
+ }
+
+ if ( need_MarkAttachClassDef )
+ {
+ OTV_OPTIONAL_OFFSET( MarkAttachClassDef );
+ OTV_SIZE_CHECK( MarkAttachClassDef );
+ if ( MarkAttachClassDef )
+ otv_ClassDef_validate( table + MarkAttachClassDef, valid );
+ }
+
+ FT_TRACE4(( "\n" ));
+ }
+
+
+/* END */