Update freetype sources (2.6.2) in third party.

third_party/freetype2/src/src/gxvalid/gxvmorx1.c

Index: third_party/freetype2/src/src/gxvalid/gxvmorx1.c
diff --git a/third_party/freetype2/src/src/gxvalid/gxvmorx1.c b/third_party/freetype2/src/src/gxvalid/gxvmorx1.c
new file mode 100644
index 0000000000000000000000000000000000000000..7ba290914d21e59a2fa2b48b456369c3220a32b4
--- /dev/null
+++ b/third_party/freetype2/src/src/gxvalid/gxvmorx1.c
@@ -0,0 +1,278 @@
+/***************************************************************************/
+/*                                                                         */
+/*  gxvmorx1.c                                                             */
+/*                                                                         */
+/*    TrueTypeGX/AAT morx table validation                                 */
+/*    body for type1 (Contextual Substitution) subtable.                   */
+/*                                                                         */
+/*  Copyright 2005-2015 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 "gxvmorx.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_gxvmorx
+
+
+  typedef struct  GXV_morx_subtable_type1_StateOptRec_
+  {
+    FT_ULong   substitutionTable;
+    FT_ULong   substitutionTable_length;
+    FT_UShort  substitutionTable_num_lookupTables;
+
+  }  GXV_morx_subtable_type1_StateOptRec,
+    *GXV_morx_subtable_type1_StateOptRecData;
+
+
+#define GXV_MORX_SUBTABLE_TYPE1_HEADER_SIZE \
+          ( GXV_STATETABLE_HEADER_SIZE + 2 )
+
+
+  static void
+  gxv_morx_subtable_type1_substitutionTable_load( FT_Bytes       table,
+                                                  FT_Bytes       limit,
+                                                  GXV_Validator  gxvalid )
+  {
+    FT_Bytes  p = table;
+
+    GXV_morx_subtable_type1_StateOptRecData  optdata =
+      (GXV_morx_subtable_type1_StateOptRecData)gxvalid->xstatetable.optdata;
+
+
+    GXV_LIMIT_CHECK( 2 );
+    optdata->substitutionTable = FT_NEXT_USHORT( p );
+  }
+
+
+  static void
+  gxv_morx_subtable_type1_subtable_setup( FT_ULong       table_size,
+                                          FT_ULong       classTable,
+                                          FT_ULong       stateArray,
+                                          FT_ULong       entryTable,
+                                          FT_ULong*      classTable_length_p,
+                                          FT_ULong*      stateArray_length_p,
+                                          FT_ULong*      entryTable_length_p,
+                                          GXV_Validator  gxvalid )
+  {
+    FT_ULong  o[4];
+    FT_ULong  *l[4];
+    FT_ULong  buff[5];
+
+    GXV_morx_subtable_type1_StateOptRecData  optdata =
+      (GXV_morx_subtable_type1_StateOptRecData)gxvalid->xstatetable.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_ulong_offset( o, l, buff, 4, table_size, gxvalid );
+  }
+
+
+  static void
+  gxv_morx_subtable_type1_entry_validate(
+    FT_UShort                       state,
+    FT_UShort                       flags,
+    GXV_StateTable_GlyphOffsetCPtr  glyphOffset_p,
+    FT_Bytes                        table,
+    FT_Bytes                        limit,
+    GXV_Validator                   gxvalid )
+  {
+#ifdef GXV_LOAD_TRACE_VARS
+    FT_UShort  setMark;
+    FT_UShort  dontAdvance;
+#endif
+    FT_UShort  reserved;
+    FT_Short   markIndex;
+    FT_Short   currentIndex;
+
+    GXV_morx_subtable_type1_StateOptRecData  optdata =
+      (GXV_morx_subtable_type1_StateOptRecData)gxvalid->xstatetable.optdata;
+
+    FT_UNUSED( state );
+    FT_UNUSED( table );
+    FT_UNUSED( limit );
+
+
+#ifdef GXV_LOAD_TRACE_VARS
+    setMark      = (FT_UShort)( ( flags >> 15 ) & 1 );
+    dontAdvance  = (FT_UShort)( ( flags >> 14 ) & 1 );
+#endif
+
+    reserved = (FT_UShort)( flags & 0x3FFF );
+
+    markIndex    = (FT_Short)( glyphOffset_p->ul >> 16 );
+    currentIndex = (FT_Short)( glyphOffset_p->ul       );
+
+    GXV_TRACE(( " setMark=%01d dontAdvance=%01d\n",
+                setMark, dontAdvance ));
+
+    if ( 0 < reserved )
+    {
+      GXV_TRACE(( " non-zero bits found in reserved range\n" ));
+      GXV_SET_ERR_IF_PARANOID( FT_INVALID_DATA );
+    }
+
+    GXV_TRACE(( "markIndex = %d, currentIndex = %d\n",
+                markIndex, currentIndex ));
+
+    if ( optdata->substitutionTable_num_lookupTables < markIndex + 1 )
+      optdata->substitutionTable_num_lookupTables =
+        (FT_UShort)( markIndex + 1 );
+
+    if ( optdata->substitutionTable_num_lookupTables < currentIndex + 1 )
+      optdata->substitutionTable_num_lookupTables =
+        (FT_UShort)( currentIndex + 1 );
+  }
+
+
+  static void
+  gxv_morx_subtable_type1_LookupValue_validate( FT_UShort            glyph,
+                                                GXV_LookupValueCPtr  value_p,
+                                                GXV_Validator        gxvalid )
+  {
+    FT_UNUSED( glyph ); /* for the non-debugging case */
+
+    GXV_TRACE(( "morx subtable type1 subst.: %d -> %d\n", glyph, value_p->u ));
+
+    if ( value_p->u > gxvalid->face->num_glyphs )
+      FT_INVALID_GLYPH_ID;
+  }
+
+
+  static GXV_LookupValueDesc
+  gxv_morx_subtable_type1_LookupFmt4_transit(
+    FT_UShort            relative_gindex,
+    GXV_LookupValueCPtr  base_value_p,
+    FT_Bytes             lookuptbl_limit,
+    GXV_Validator        gxvalid )
+  {
+    FT_Bytes             p;
+    FT_Bytes             limit;
+    FT_UShort            offset;
+    GXV_LookupValueDesc  value;
+
+    /* XXX: check range? */
+    offset = (FT_UShort)( base_value_p->u +
+                          relative_gindex * sizeof ( FT_UShort ) );
+
+    p     = gxvalid->lookuptbl_head + offset;
+    limit = lookuptbl_limit;
+
+    GXV_LIMIT_CHECK ( 2 );
+    value.u = FT_NEXT_USHORT( p );
+
+    return value;
+  }
+
+
+  /*
+   * TODO: length should be limit?
+   **/
+  static void
+  gxv_morx_subtable_type1_substitutionTable_validate( FT_Bytes       table,
+                                                      FT_Bytes       limit,
+                                                      GXV_Validator  gxvalid )
+  {
+    FT_Bytes   p = table;
+    FT_UShort  i;
+
+    GXV_morx_subtable_type1_StateOptRecData  optdata =
+      (GXV_morx_subtable_type1_StateOptRecData)gxvalid->xstatetable.optdata;
+
+
+    /* TODO: calculate offset/length for each lookupTables */
+    gxvalid->lookupval_sign   = GXV_LOOKUPVALUE_UNSIGNED;
+    gxvalid->lookupval_func   = gxv_morx_subtable_type1_LookupValue_validate;
+    gxvalid->lookupfmt4_trans = gxv_morx_subtable_type1_LookupFmt4_transit;
+
+    for ( i = 0; i < optdata->substitutionTable_num_lookupTables; i++ )
+    {
+      FT_ULong  offset;
+
+
+      GXV_LIMIT_CHECK( 4 );
+      offset = FT_NEXT_ULONG( p );
+
+      gxv_LookupTable_validate( table + offset, limit, gxvalid );
+    }
+
+    /* TODO: overlapping of lookupTables in substitutionTable */
+  }
+
+
+  /*
+   * subtable for Contextual glyph substitution is a modified StateTable.
+   * In addition to classTable, stateArray, entryTable, the field
+   * `substitutionTable' is added.
+   */
+  FT_LOCAL_DEF( void )
+  gxv_morx_subtable_type1_validate( FT_Bytes       table,
+                                    FT_Bytes       limit,
+                                    GXV_Validator  gxvalid )
+  {
+    FT_Bytes  p = table;
+
+    GXV_morx_subtable_type1_StateOptRec  st_rec;
+
+
+    GXV_NAME_ENTER( "morx chain subtable type1 (Contextual Glyph Subst)" );
+
+    GXV_LIMIT_CHECK( GXV_MORX_SUBTABLE_TYPE1_HEADER_SIZE );
+
+    st_rec.substitutionTable_num_lookupTables = 0;
+
+    gxvalid->xstatetable.optdata =
+      &st_rec;
+    gxvalid->xstatetable.optdata_load_func =
+      gxv_morx_subtable_type1_substitutionTable_load;
+    gxvalid->xstatetable.subtable_setup_func =
+      gxv_morx_subtable_type1_subtable_setup;
+    gxvalid->xstatetable.entry_glyphoffset_fmt =
+      GXV_GLYPHOFFSET_ULONG;
+    gxvalid->xstatetable.entry_validate_func =
+      gxv_morx_subtable_type1_entry_validate;
+
+    gxv_XStateTable_validate( p, limit, gxvalid );
+
+    gxv_morx_subtable_type1_substitutionTable_validate(
+      table + st_rec.substitutionTable,
+      table + st_rec.substitutionTable + st_rec.substitutionTable_length,
+      gxvalid );
+
+    GXV_EXIT;
+  }
+
+
+/* END */