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.
/***************************************************************************/
/* */
/* gxvmort1.c */
/* */
/* TrueTypeGX/AAT mort table validation */
/* body for type1 (Contextual Substitution) subtable. */
/* */
/* Copyright 2005, 2007 by suzuki toshiya, Masatake YAMATO, Red Hat K.K., */
/* 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. */
/* */
/***************************************************************************/
/***************************************************************************/
/* */
/* gxvalid is derived from both gxlayout module and otvalid module. */
/* Development of gxlayout is supported by the Information-technology */
/* Promotion Agency(IPA), Japan. */
/* */
/***************************************************************************/
#include "gxvmort.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_gxvmort
typedef struct GXV_mort_subtable_type1_StateOptRec_
{
FT_UShort substitutionTable;
FT_UShort substitutionTable_length;
} GXV_mort_subtable_type1_StateOptRec,
*GXV_mort_subtable_type1_StateOptRecData;
#define GXV_MORT_SUBTABLE_TYPE1_HEADER_SIZE \
( GXV_STATETABLE_HEADER_SIZE + 2 )
static void
gxv_mort_subtable_type1_substitutionTable_load( FT_Bytes table,
FT_Bytes limit,
GXV_Validator valid )
{
FT_Bytes p = table;
GXV_mort_subtable_type1_StateOptRecData optdata =
(GXV_mort_subtable_type1_StateOptRecData)valid->statetable.optdata;
GXV_LIMIT_CHECK( 2 );
optdata->substitutionTable = FT_NEXT_USHORT( p );
}
static void
gxv_mort_subtable_type1_subtable_setup( FT_UShort table_size,
FT_UShort classTable,
FT_UShort stateArray,
FT_UShort entryTable,
FT_UShort* classTable_length_p,
FT_UShort* stateArray_length_p,
FT_UShort* entryTable_length_p,
GXV_Validator valid )
{
FT_UShort o[4];
FT_UShort *l[4];
FT_UShort buff[5];
GXV_mort_subtable_type1_StateOptRecData optdata =
(GXV_mort_subtable_type1_StateOptRecData)valid->statetable.optdata;
o[0] = classTable;
o[1] = stateArray;
o[2] = entryTable;
o[3] = optdata->substitutionTable;
l[0] = classTable_length_p;
l[1] = stateArray_length_p;
l[2] = entryTable_length_p;
l[3] = &( optdata->substitutionTable_length );
gxv_set_length_by_ushort_offset( o, l, buff, 4, table_size, valid );
}
static void
gxv_mort_subtable_type1_offset_to_subst_validate(
FT_Short wordOffset,
const FT_String* tag,
FT_Byte state,
GXV_Validator valid )
{
FT_UShort substTable;
FT_UShort substTable_limit;
FT_UShort min_gid;
FT_UShort max_gid;
FT_UNUSED( tag );
FT_UNUSED( state );
substTable =
((GXV_mort_subtable_type1_StateOptRec *)
(valid->statetable.optdata))->substitutionTable;
substTable_limit =
(FT_UShort)( substTable +
((GXV_mort_subtable_type1_StateOptRec *)
(valid->statetable.optdata))->substitutionTable_length );
min_gid = (FT_UShort)( ( substTable - wordOffset * 2 ) / 2 );
max_gid = (FT_UShort)( ( substTable_limit - wordOffset * 2 ) / 2 );
max_gid = (FT_UShort)( FT_MAX( max_gid, valid->face->num_glyphs ) );
/* XXX: check range? */
/* TODO: min_gid & max_gid comparison with ClassTable contents */
}
static void
gxv_mort_subtable_type1_entry_validate(
FT_Byte state,
FT_UShort flags,
GXV_StateTable_GlyphOffsetCPtr glyphOffset_p,
FT_Bytes table,
FT_Bytes limit,
GXV_Validator valid )
{
FT_UShort setMark;
FT_UShort dontAdvance;
FT_UShort reserved;
FT_Short markOffset;
FT_Short currentOffset;
FT_UNUSED( table );
FT_UNUSED( limit );
setMark = (FT_UShort)( flags >> 15 );
dontAdvance = (FT_UShort)( ( flags >> 14 ) & 1 );
reserved = (FT_Short)( flags & 0x3FFF );
markOffset = (FT_Short)( glyphOffset_p->ul >> 16 );
currentOffset = (FT_Short)( glyphOffset_p->ul );
if ( 0 < reserved )
{
GXV_TRACE(( " non-zero bits found in reserved range\n" ));
if ( valid->root->level >= FT_VALIDATE_PARANOID )
FT_INVALID_DATA;
}
gxv_mort_subtable_type1_offset_to_subst_validate( markOffset,
"markOffset",
state,
valid );
gxv_mort_subtable_type1_offset_to_subst_validate( currentOffset,
"currentOffset",
state,
valid );
}
static void
gxv_mort_subtable_type1_substTable_validate( FT_Bytes table,
FT_Bytes limit,
GXV_Validator valid )
{
FT_Bytes p = table;
FT_UShort num_gids = (FT_UShort)(
((GXV_mort_subtable_type1_StateOptRec *)
(valid->statetable.optdata))->substitutionTable_length / 2 );
FT_UShort i;
GXV_NAME_ENTER( "validating contents of substitutionTable" );
for ( i = 0; i < num_gids ; i ++ )
{
FT_UShort dst_gid;
GXV_LIMIT_CHECK( 2 );
dst_gid = FT_NEXT_USHORT( p );
if ( dst_gid >= 0xFFFFU )
continue;
if ( dst_gid > valid->face->num_glyphs )
{
GXV_TRACE(( "substTable include too large gid[%d]=%d >"
" max defined gid #%d\n",
i, dst_gid, valid->face->num_glyphs ));
if ( valid->root->level >= FT_VALIDATE_PARANOID )
FT_INVALID_GLYPH_ID;
}
}
GXV_EXIT;
}
/*
* subtable for Contextual glyph substitution is a modified StateTable.
* In addition to classTable, stateArray, and entryTable, the field
* `substitutionTable' is added.
*/
FT_LOCAL_DEF( void )
gxv_mort_subtable_type1_validate( FT_Bytes table,
FT_Bytes limit,
GXV_Validator valid )
{
FT_Bytes p = table;
GXV_mort_subtable_type1_StateOptRec st_rec;
GXV_NAME_ENTER( "mort chain subtable type1 (Contextual Glyph Subst)" );
GXV_LIMIT_CHECK( GXV_MORT_SUBTABLE_TYPE1_HEADER_SIZE );
valid->statetable.optdata =
&st_rec;
valid->statetable.optdata_load_func =
gxv_mort_subtable_type1_substitutionTable_load;
valid->statetable.subtable_setup_func =
gxv_mort_subtable_type1_subtable_setup;
valid->statetable.entry_glyphoffset_fmt =
GXV_GLYPHOFFSET_ULONG;
valid->statetable.entry_validate_func =
gxv_mort_subtable_type1_entry_validate;
gxv_StateTable_validate( p, limit, valid );
gxv_mort_subtable_type1_substTable_validate(
table + st_rec.substitutionTable,
table + st_rec.substitutionTable + st_rec.substitutionTable_length,
valid );
GXV_EXIT;
}
/* END */