--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/misc/libfreetype/src/otvalid/otvjstf.c Mon Apr 25 01:46:54 2011 +0200
@@ -0,0 +1,258 @@
+/***************************************************************************/
+/* */
+/* otvjstf.c */
+/* */
+/* OpenType JSTF table validation (body). */
+/* */
+/* Copyright 2004, 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"
+#include "otvgpos.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_otvjstf
+
+
+#define JstfPriorityFunc otv_JstfPriority_validate
+#define JstfLookupFunc otv_GPOS_subtable_validate
+
+ /* uses valid->extra1 (GSUB lookup count) */
+ /* uses valid->extra2 (GPOS lookup count) */
+ /* sets valid->extra1 (counter) */
+
+ static void
+ otv_JstfPriority_validate( FT_Bytes table,
+ OTV_Validator valid )
+ {
+ FT_Bytes p = table;
+ FT_UInt table_size;
+ FT_UInt gsub_lookup_count, gpos_lookup_count;
+
+ OTV_OPTIONAL_TABLE( ShrinkageEnableGSUB );
+ OTV_OPTIONAL_TABLE( ShrinkageDisableGSUB );
+ OTV_OPTIONAL_TABLE( ShrinkageEnableGPOS );
+ OTV_OPTIONAL_TABLE( ShrinkageDisableGPOS );
+ OTV_OPTIONAL_TABLE( ExtensionEnableGSUB );
+ OTV_OPTIONAL_TABLE( ExtensionDisableGSUB );
+ OTV_OPTIONAL_TABLE( ExtensionEnableGPOS );
+ OTV_OPTIONAL_TABLE( ExtensionDisableGPOS );
+ OTV_OPTIONAL_TABLE( ShrinkageJstfMax );
+ OTV_OPTIONAL_TABLE( ExtensionJstfMax );
+
+
+ OTV_ENTER;
+ OTV_TRACE(( "JstfPriority table\n" ));
+
+ OTV_LIMIT_CHECK( 20 );
+
+ gsub_lookup_count = valid->extra1;
+ gpos_lookup_count = valid->extra2;
+
+ table_size = 20;
+
+ valid->extra1 = gsub_lookup_count;
+
+ OTV_OPTIONAL_OFFSET( ShrinkageEnableGSUB );
+ OTV_SIZE_CHECK( ShrinkageEnableGSUB );
+ if ( ShrinkageEnableGSUB )
+ otv_x_ux( table + ShrinkageEnableGSUB, valid );
+
+ OTV_OPTIONAL_OFFSET( ShrinkageDisableGSUB );
+ OTV_SIZE_CHECK( ShrinkageDisableGSUB );
+ if ( ShrinkageDisableGSUB )
+ otv_x_ux( table + ShrinkageDisableGSUB, valid );
+
+ valid->extra1 = gpos_lookup_count;
+
+ OTV_OPTIONAL_OFFSET( ShrinkageEnableGPOS );
+ OTV_SIZE_CHECK( ShrinkageEnableGPOS );
+ if ( ShrinkageEnableGPOS )
+ otv_x_ux( table + ShrinkageEnableGPOS, valid );
+
+ OTV_OPTIONAL_OFFSET( ShrinkageDisableGPOS );
+ OTV_SIZE_CHECK( ShrinkageDisableGPOS );
+ if ( ShrinkageDisableGPOS )
+ otv_x_ux( table + ShrinkageDisableGPOS, valid );
+
+ OTV_OPTIONAL_OFFSET( ShrinkageJstfMax );
+ OTV_SIZE_CHECK( ShrinkageJstfMax );
+ if ( ShrinkageJstfMax )
+ {
+ /* XXX: check lookup types? */
+ OTV_NEST2( JstfMax, JstfLookup );
+ OTV_RUN( table + ShrinkageJstfMax, valid );
+ }
+
+ valid->extra1 = gsub_lookup_count;
+
+ OTV_OPTIONAL_OFFSET( ExtensionEnableGSUB );
+ OTV_SIZE_CHECK( ExtensionEnableGSUB );
+ if ( ExtensionEnableGSUB )
+ otv_x_ux( table + ExtensionEnableGSUB, valid );
+
+ OTV_OPTIONAL_OFFSET( ExtensionDisableGSUB );
+ OTV_SIZE_CHECK( ExtensionDisableGSUB );
+ if ( ExtensionDisableGSUB )
+ otv_x_ux( table + ExtensionDisableGSUB, valid );
+
+ valid->extra1 = gpos_lookup_count;
+
+ OTV_OPTIONAL_OFFSET( ExtensionEnableGPOS );
+ OTV_SIZE_CHECK( ExtensionEnableGPOS );
+ if ( ExtensionEnableGPOS )
+ otv_x_ux( table + ExtensionEnableGPOS, valid );
+
+ OTV_OPTIONAL_OFFSET( ExtensionDisableGPOS );
+ OTV_SIZE_CHECK( ExtensionDisableGPOS );
+ if ( ExtensionDisableGPOS )
+ otv_x_ux( table + ExtensionDisableGPOS, valid );
+
+ OTV_OPTIONAL_OFFSET( ExtensionJstfMax );
+ OTV_SIZE_CHECK( ExtensionJstfMax );
+ if ( ExtensionJstfMax )
+ {
+ /* XXX: check lookup types? */
+ OTV_NEST2( JstfMax, JstfLookup );
+ OTV_RUN( table + ExtensionJstfMax, valid );
+ }
+
+ valid->extra1 = gsub_lookup_count;
+ valid->extra2 = gpos_lookup_count;
+
+ OTV_EXIT;
+ }
+
+
+ /* sets valid->extra (glyph count) */
+ /* sets valid->func1 (otv_JstfPriority_validate) */
+
+ static void
+ otv_JstfScript_validate( FT_Bytes table,
+ OTV_Validator valid )
+ {
+ FT_Bytes p = table;
+ FT_UInt table_size;
+ FT_UInt JstfLangSysCount;
+
+ OTV_OPTIONAL_TABLE( ExtGlyph );
+ OTV_OPTIONAL_TABLE( DefJstfLangSys );
+
+
+ OTV_NAME_ENTER( "JstfScript" );
+
+ OTV_LIMIT_CHECK( 6 );
+ OTV_OPTIONAL_OFFSET( ExtGlyph );
+ OTV_OPTIONAL_OFFSET( DefJstfLangSys );
+ JstfLangSysCount = FT_NEXT_USHORT( p );
+
+ OTV_TRACE(( " (JstfLangSysCount = %d)\n", JstfLangSysCount ));
+
+ table_size = JstfLangSysCount * 6 + 6;
+
+ OTV_SIZE_CHECK( ExtGlyph );
+ if ( ExtGlyph )
+ {
+ valid->extra1 = valid->glyph_count;
+ OTV_NEST1( ExtenderGlyph );
+ OTV_RUN( table + ExtGlyph, valid );
+ }
+
+ OTV_SIZE_CHECK( DefJstfLangSys );
+ if ( DefJstfLangSys )
+ {
+ OTV_NEST2( JstfLangSys, JstfPriority );
+ OTV_RUN( table + DefJstfLangSys, valid );
+ }
+
+ OTV_LIMIT_CHECK( 6 * JstfLangSysCount );
+
+ /* JstfLangSysRecord */
+ OTV_NEST2( JstfLangSys, JstfPriority );
+ for ( ; JstfLangSysCount > 0; JstfLangSysCount-- )
+ {
+ p += 4; /* skip JstfLangSysTag */
+
+ OTV_RUN( table + FT_NEXT_USHORT( p ), valid );
+ }
+
+ OTV_EXIT;
+ }
+
+
+ /* sets valid->extra1 (GSUB lookup count) */
+ /* sets valid->extra2 (GPOS lookup count) */
+ /* sets valid->glyph_count */
+
+ FT_LOCAL_DEF( void )
+ otv_JSTF_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 JstfScriptCount;
+
+
+ valid->root = ftvalid;
+
+ FT_TRACE3(( "validating JSTF table\n" ));
+ OTV_INIT;
+
+ OTV_LIMIT_CHECK( 6 );
+
+ if ( FT_NEXT_ULONG( p ) != 0x10000UL ) /* Version */
+ FT_INVALID_FORMAT;
+
+ JstfScriptCount = FT_NEXT_USHORT( p );
+
+ FT_TRACE3(( " (JstfScriptCount = %d)\n", JstfScriptCount ));
+
+ OTV_LIMIT_CHECK( JstfScriptCount * 6 );
+
+ if ( gsub )
+ valid->extra1 = otv_GSUBGPOS_get_Lookup_count( gsub );
+ else
+ valid->extra1 = 0;
+
+ if ( gpos )
+ valid->extra2 = otv_GSUBGPOS_get_Lookup_count( gpos );
+ else
+ valid->extra2 = 0;
+
+ valid->glyph_count = glyph_count;
+
+ /* JstfScriptRecord */
+ for ( ; JstfScriptCount > 0; JstfScriptCount-- )
+ {
+ p += 4; /* skip JstfScriptTag */
+
+ /* JstfScript */
+ otv_JstfScript_validate( table + FT_NEXT_USHORT( p ), valid );
+ }
+
+ FT_TRACE4(( "\n" ));
+ }
+
+
+/* END */