Added a new function: AddNewEvent, which only adds an event to the list if it doesn't already exist. Kept the old one as it might me useful to be able to add an event more than once.
/***************************************************************************/
/* */
/* 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 */