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kc3-lang/freetype/src/otvalid/otvjstf.c
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Author :
Werner Lemberg
Date : 2007-08-08 06:38:06
Hash : d76fe5a1
Message : * src/otvalid/otvbase.c, src/otvalid/otvcommn.c, src/otvalid/otvgdef.c, src/otvalid/otvgpos.c, src/otvalid/otvgsub.c, src/otvalid/otvjstf.c: s/FT_INVALID_DATA/FT_INVALID_FORMAT/ where appropriate. Reported by George. * include/freetype/internal/fttrace.h: Define `trace_otvmath'. * src/otvalid/rules.mk (OTV_DRV_SRC): Add otvmath.c. * docs/CHANGES: Updated. Add `MATH' validating support to otvalid module. * include/freetype/tttags.h (TTAG_MATH): New macro. * include/freetype/ftotval.h (FT_VALIDATE_MATH): New macro. (FT_VALIDATE_OT): Updated. * src/otvalid/otmath.c: New file. * src/otvalid/otvalid.c: Include otvmath.c. * src/otvalid/otvmod.c (otv_validate): Handle `MATH' table.
- src/otvalid/otvjstf.c
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/***************************************************************************/ /* */ /* 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 */