Update freetype sources (2.6.2) in third party.

third_party/freetype2/src/src/gxvalid/gxvmort4.c

Index: third_party/freetype2/src/src/gxvalid/gxvmort4.c
diff --git a/third_party/freetype2/src/src/gxvalid/gxvmort4.c b/third_party/freetype2/src/src/gxvalid/gxvmort4.c
new file mode 100644
index 0000000000000000000000000000000000000000..535f37716de83b8cacfe13c956257a436ca261c2
--- /dev/null
+++ b/third_party/freetype2/src/src/gxvalid/gxvmort4.c
@@ -0,0 +1,126 @@
+/***************************************************************************/
+/*                                                                         */
+/*  gxvmort4.c                                                             */
+/*                                                                         */
+/*    TrueTypeGX/AAT mort table validation                                 */
+/*    body for type4 (Non-Contextual Glyph 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 "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
+
+
+  static void
+  gxv_mort_subtable_type4_lookupval_validate( FT_UShort            glyph,
+                                              GXV_LookupValueCPtr  value_p,
+                                              GXV_Validator        gxvalid )
+  {
+    FT_UNUSED( glyph );
+
+    gxv_glyphid_validate( value_p->u, gxvalid );
+  }
+
+  /*
+    +===============+ --------+
+    | lookup header |         |
+    +===============+         |
+    | BinSrchHeader |         |
+    +===============+         |
+    | lastGlyph[0]  |         |
+    +---------------+         |
+    | firstGlyph[0] |         |    head of lookup table
+    +---------------+         |             +
+    | offset[0]     |    ->   |          offset            [byte]
+    +===============+         |             +
+    | lastGlyph[1]  |         | (glyphID - firstGlyph) * 2 [byte]
+    +---------------+         |
+    | firstGlyph[1] |         |
+    +---------------+         |
+    | offset[1]     |         |
+    +===============+         |
+                              |
+     ....                     |
+                              |
+    16bit value array         |
+    +===============+         |
+    |     value     | <-------+
+     ....
+  */
+
+  static GXV_LookupValueDesc
+  gxv_mort_subtable_type4_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;
+  }
+
+
+  FT_LOCAL_DEF( void )
+  gxv_mort_subtable_type4_validate( FT_Bytes       table,
+                                    FT_Bytes       limit,
+                                    GXV_Validator  gxvalid )
+  {
+    FT_Bytes  p = table;
+
+
+    GXV_NAME_ENTER( "mort chain subtable type4 "
+                    "(Non-Contextual Glyph Substitution)" );
+
+    gxvalid->lookupval_sign   = GXV_LOOKUPVALUE_UNSIGNED;
+    gxvalid->lookupval_func   = gxv_mort_subtable_type4_lookupval_validate;
+    gxvalid->lookupfmt4_trans = gxv_mort_subtable_type4_lookupfmt4_transit;
+
+    gxv_LookupTable_validate( p, limit, gxvalid );
+
+    GXV_EXIT;
+  }
+
+
+/* END */