Update freetype sources (2.6.2) in third party.

third_party/freetype2/src/src/gxvalid/gxvmort0.c

Index: third_party/freetype2/src/src/gxvalid/gxvmort0.c
diff --git a/third_party/freetype2/src/src/gxvalid/gxvmort0.c b/third_party/freetype2/src/src/gxvalid/gxvmort0.c
new file mode 100644
index 0000000000000000000000000000000000000000..0cace35ae24a07fc6563b8dce3f6f5fe3b559c4f
--- /dev/null
+++ b/third_party/freetype2/src/src/gxvalid/gxvmort0.c
@@ -0,0 +1,152 @@
+/***************************************************************************/
+/*                                                                         */
+/*  gxvmort0.c                                                             */
+/*                                                                         */
+/*    TrueTypeGX/AAT mort table validation                                 */
+/*    body for type0 (Indic Script Rearrangement) 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 const char* GXV_Mort_IndicScript_Msg[] =
+  {
+    "no change",
+    "Ax => xA",
+    "xD => Dx",
+    "AxD => DxA",
+    "ABx => xAB",
+    "ABx => xBA",
+    "xCD => CDx",
+    "xCD => DCx",
+    "AxCD => CDxA",
+    "AxCD => DCxA",
+    "ABxD => DxAB",
+    "ABxD => DxBA",
+    "ABxCD => CDxAB",
+    "ABxCD => CDxBA",
+    "ABxCD => DCxAB",
+    "ABxCD => DCxBA",
+
+  };
+
+
+  static void
+  gxv_mort_subtable_type0_entry_validate(
+    FT_Byte                         state,
+    FT_UShort                       flags,
+    GXV_StateTable_GlyphOffsetCPtr  glyphOffset_p,
+    FT_Bytes                        table,
+    FT_Bytes                        limit,
+    GXV_Validator                   gxvalid )
+  {
+    FT_UShort  markFirst;
+    FT_UShort  dontAdvance;
+    FT_UShort  markLast;
+    FT_UShort  reserved;
+    FT_UShort  verb = 0;
+
+    FT_UNUSED( state );
+    FT_UNUSED( table );
+    FT_UNUSED( limit );
+
+    FT_UNUSED( GXV_Mort_IndicScript_Msg[verb] ); /* for the non-debugging */
+    FT_UNUSED( glyphOffset_p );                  /* case                  */
+
+
+    markFirst   = (FT_UShort)( ( flags >> 15 ) & 1 );
+    dontAdvance = (FT_UShort)( ( flags >> 14 ) & 1 );
+    markLast    = (FT_UShort)( ( flags >> 13 ) & 1 );
+
+    reserved = (FT_UShort)( flags & 0x1FF0 );
+    verb     = (FT_UShort)( flags & 0x000F );
+
+    GXV_TRACE(( "  IndicScript MorphRule for glyphOffset 0x%04x",
+                glyphOffset_p->u ));
+    GXV_TRACE(( " markFirst=%01d", markFirst ));
+    GXV_TRACE(( " dontAdvance=%01d", dontAdvance ));
+    GXV_TRACE(( " markLast=%01d", markLast ));
+    GXV_TRACE(( " %02d", verb ));
+    GXV_TRACE(( " %s\n", GXV_Mort_IndicScript_Msg[verb] ));
+
+    if ( markFirst > 0 && markLast > 0 )
+    {
+      GXV_TRACE(( "  [odd] a glyph is marked as the first and last"
+                  "  in Indic rearrangement\n" ));
+      GXV_SET_ERR_IF_PARANOID( FT_INVALID_DATA );
+    }
+
+    if ( markFirst > 0 && dontAdvance > 0 )
+    {
+      GXV_TRACE(( "  [odd] the first glyph is marked as dontAdvance"
+                  " in Indic rearrangement\n" ));
+      GXV_SET_ERR_IF_PARANOID( FT_INVALID_DATA );
+    }
+
+    if ( 0 < reserved )
+    {
+      GXV_TRACE(( " non-zero bits found in reserved range\n" ));
+      GXV_SET_ERR_IF_PARANOID( FT_INVALID_DATA );
+    }
+    else
+      GXV_TRACE(( "\n" ));
+  }
+
+
+  FT_LOCAL_DEF( void )
+  gxv_mort_subtable_type0_validate( FT_Bytes       table,
+                                    FT_Bytes       limit,
+                                    GXV_Validator  gxvalid )
+  {
+    FT_Bytes  p = table;
+
+
+    GXV_NAME_ENTER(
+      "mort chain subtable type0 (Indic-Script Rearrangement)" );
+
+    GXV_LIMIT_CHECK( GXV_STATETABLE_HEADER_SIZE );
+
+    gxvalid->statetable.optdata               = NULL;
+    gxvalid->statetable.optdata_load_func     = NULL;
+    gxvalid->statetable.subtable_setup_func   = NULL;
+    gxvalid->statetable.entry_glyphoffset_fmt = GXV_GLYPHOFFSET_NONE;
+    gxvalid->statetable.entry_validate_func =
+      gxv_mort_subtable_type0_entry_validate;
+
+    gxv_StateTable_validate( p, limit, gxvalid );
+
+    GXV_EXIT;
+  }
+
+
+/* END */