Update freetype sources (2.6.2) in third party.

third_party/freetype2/src/src/gxvalid/gxvopbd.c

Index: third_party/freetype2/src/src/gxvalid/gxvopbd.c
diff --git a/third_party/freetype2/src/src/gxvalid/gxvopbd.c b/third_party/freetype2/src/src/gxvalid/gxvopbd.c
new file mode 100644
index 0000000000000000000000000000000000000000..7cd5163b1795ec98c36e4b5b630509deec904775
--- /dev/null
+++ b/third_party/freetype2/src/src/gxvalid/gxvopbd.c
@@ -0,0 +1,218 @@
+/***************************************************************************/
+/*                                                                         */
+/*  gxvopbd.c                                                              */
+/*                                                                         */
+/*    TrueTypeGX/AAT opbd table validation (body).                         */
+/*                                                                         */
+/*  Copyright 2004-2015 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 "gxvalid.h"
+#include "gxvcommn.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_gxvopbd
+
+
+  /*************************************************************************/
+  /*************************************************************************/
+  /*****                                                               *****/
+  /*****                      Data and Types                           *****/
+  /*****                                                               *****/
+  /*************************************************************************/
+  /*************************************************************************/
+
+  typedef struct  GXV_opbd_DataRec_
+  {
+    FT_UShort  format;
+    FT_UShort  valueOffset_min;
+
+  } GXV_opbd_DataRec, *GXV_opbd_Data;
+
+
+#define GXV_OPBD_DATA( FIELD )  GXV_TABLE_DATA( opbd, FIELD )
+
+
+  /*************************************************************************/
+  /*************************************************************************/
+  /*****                                                               *****/
+  /*****                      UTILITY FUNCTIONS                        *****/
+  /*****                                                               *****/
+  /*************************************************************************/
+  /*************************************************************************/
+
+  static void
+  gxv_opbd_LookupValue_validate( FT_UShort            glyph,
+                                 GXV_LookupValueCPtr  value_p,
+                                 GXV_Validator        gxvalid )
+  {
+    /* offset in LookupTable is measured from the head of opbd table */
+    FT_Bytes   p     = gxvalid->root->base + value_p->u;
+    FT_Bytes   limit = gxvalid->root->limit;
+    FT_Short   delta_value;
+    int        i;
+
+
+    if ( value_p->u < GXV_OPBD_DATA( valueOffset_min ) )
+      GXV_OPBD_DATA( valueOffset_min ) = value_p->u;
+
+    for ( i = 0; i < 4; i++ )
+    {
+      GXV_LIMIT_CHECK( 2 );
+      delta_value = FT_NEXT_SHORT( p );
+
+      if ( GXV_OPBD_DATA( format ) )    /* format 1, value is ctrl pt. */
+      {
+        if ( delta_value == -1 )
+          continue;
+
+        gxv_ctlPoint_validate( glyph, (FT_UShort)delta_value, gxvalid );
+      }
+      else                              /* format 0, value is distance */
+        continue;
+    }
+  }
+
+
+  /*
+    opbd ---------------------+
+                              |
+    +===============+         |
+    | lookup header |         |
+    +===============+         |
+    | BinSrchHeader |         |
+    +===============+         |
+    | lastGlyph[0]  |         |
+    +---------------+         |
+    | firstGlyph[0] |         |  head of opbd sfnt table
+    +---------------+         |             +
+    | offset[0]     |    ->   |          offset            [byte]
+    +===============+         |             +
+    | lastGlyph[1]  |         | (glyphID - firstGlyph) * 4 * sizeof(FT_Short) [byte]
+    +---------------+         |
+    | firstGlyph[1] |         |
+    +---------------+         |
+    | offset[1]     |         |
+    +===============+         |
+                              |
+     ....                     |
+                              |
+    48bit value array         |
+    +===============+         |
+    |     value     | <-------+
+    |               |
+    |               |
+    |               |
+    +---------------+
+    .... */
+
+  static GXV_LookupValueDesc
+  gxv_opbd_LookupFmt4_transit( FT_UShort            relative_gindex,
+                               GXV_LookupValueCPtr  base_value_p,
+                               FT_Bytes             lookuptbl_limit,
+                               GXV_Validator        gxvalid )
+  {
+    GXV_LookupValueDesc  value;
+
+    FT_UNUSED( lookuptbl_limit );
+    FT_UNUSED( gxvalid );
+
+    /* XXX: check range? */
+    value.u = (FT_UShort)( base_value_p->u +
+                           relative_gindex * 4 * sizeof ( FT_Short ) );
+
+    return value;
+  }
+
+
+  /*************************************************************************/
+  /*************************************************************************/
+  /*****                                                               *****/
+  /*****                         opbd TABLE                            *****/
+  /*****                                                               *****/
+  /*************************************************************************/
+  /*************************************************************************/
+
+  FT_LOCAL_DEF( void )
+  gxv_opbd_validate( FT_Bytes      table,
+                     FT_Face       face,
+                     FT_Validator  ftvalid )
+  {
+    GXV_ValidatorRec  gxvalidrec;
+    GXV_Validator     gxvalid = &gxvalidrec;
+    GXV_opbd_DataRec  opbdrec;
+    GXV_opbd_Data     opbd  = &opbdrec;
+    FT_Bytes          p     = table;
+    FT_Bytes          limit = 0;
+
+    FT_ULong  version;
+
+
+    gxvalid->root       = ftvalid;
+    gxvalid->table_data = opbd;
+    gxvalid->face       = face;
+
+    FT_TRACE3(( "validating `opbd' table\n" ));
+    GXV_INIT;
+    GXV_OPBD_DATA( valueOffset_min ) = 0xFFFFU;
+
+
+    GXV_LIMIT_CHECK( 4 + 2 );
+    version                 = FT_NEXT_ULONG( p );
+    GXV_OPBD_DATA( format ) = FT_NEXT_USHORT( p );
+
+
+    /* only 0x00010000 is defined (1996) */
+    GXV_TRACE(( "(version=0x%08x)\n", version ));
+    if ( 0x00010000UL != version )
+      FT_INVALID_FORMAT;
+
+    /* only values 0 and 1 are defined (1996) */
+    GXV_TRACE(( "(format=0x%04x)\n", GXV_OPBD_DATA( format ) ));
+    if ( 0x0001 < GXV_OPBD_DATA( format ) )
+      FT_INVALID_FORMAT;
+
+    gxvalid->lookupval_sign   = GXV_LOOKUPVALUE_UNSIGNED;
+    gxvalid->lookupval_func   = gxv_opbd_LookupValue_validate;
+    gxvalid->lookupfmt4_trans = gxv_opbd_LookupFmt4_transit;
+
+    gxv_LookupTable_validate( p, limit, gxvalid );
+    p += gxvalid->subtable_length;
+
+    if ( p > table + GXV_OPBD_DATA( valueOffset_min ) )
+    {
+      GXV_TRACE((
+        "found overlap between LookupTable and opbd_value array\n" ));
+      FT_INVALID_OFFSET;
+    }
+
+    FT_TRACE4(( "\n" ));
+  }
+
+
+/* END */