Update freetype sources (2.6.2) in third party.

third_party/freetype2/src/src/otvalid/otvgdef.c

Index: third_party/freetype2/src/src/otvalid/otvgdef.c
diff --git a/third_party/freetype2/src/src/otvalid/otvgdef.c b/third_party/freetype2/src/src/otvalid/otvgdef.c
new file mode 100644
index 0000000000000000000000000000000000000000..8269d2f5b8611ca81640a66e5ce8a846f2385f5c
--- /dev/null
+++ b/third_party/freetype2/src/src/otvalid/otvgdef.c
@@ -0,0 +1,224 @@
+/***************************************************************************/
+/*                                                                         */
+/*  otvgdef.c                                                              */
+/*                                                                         */
+/*    OpenType GDEF table validation (body).                               */
+/*                                                                         */
+/*  Copyright 2004-2015 by                                                 */
+/*  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.                                        */
+/*                                                                         */
+/***************************************************************************/
+
+
+#include "otvalid.h"
+#include "otvcommn.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_otvgdef
+
+
+  /*************************************************************************/
+  /*************************************************************************/
+  /*****                                                               *****/
+  /*****                      UTILITY FUNCTIONS                        *****/
+  /*****                                                               *****/
+  /*************************************************************************/
+  /*************************************************************************/
+
+#define AttachListFunc    otv_O_x_Ox
+#define LigCaretListFunc  otv_O_x_Ox
+
+  /* sets valid->extra1 (0)           */
+
+  static void
+  otv_O_x_Ox( FT_Bytes       table,
+              OTV_Validator  otvalid )
+  {
+    FT_Bytes           p = table;
+    FT_Bytes           Coverage;
+    FT_UInt            GlyphCount;
+    OTV_Validate_Func  func;
+
+
+    OTV_ENTER;
+
+    OTV_LIMIT_CHECK( 4 );
+    Coverage   = table + FT_NEXT_USHORT( p );
+    GlyphCount = FT_NEXT_USHORT( p );
+
+    OTV_TRACE(( " (GlyphCount = %d)\n", GlyphCount ));
+
+    otv_Coverage_validate( Coverage, otvalid, (FT_Int)GlyphCount );
+    if ( GlyphCount != otv_Coverage_get_count( Coverage ) )
+      FT_INVALID_DATA;
+
+    OTV_LIMIT_CHECK( GlyphCount * 2 );
+
+    otvalid->nesting_level++;
+    func          = otvalid->func[otvalid->nesting_level];
+    otvalid->extra1 = 0;
+
+    for ( ; GlyphCount > 0; GlyphCount-- )
+      func( table + FT_NEXT_USHORT( p ), otvalid );
+
+    otvalid->nesting_level--;
+
+    OTV_EXIT;
+  }
+
+
+  /*************************************************************************/
+  /*************************************************************************/
+  /*****                                                               *****/
+  /*****                       LIGATURE CARETS                         *****/
+  /*****                                                               *****/
+  /*************************************************************************/
+  /*************************************************************************/
+
+#define CaretValueFunc  otv_CaretValue_validate
+
+  static void
+  otv_CaretValue_validate( FT_Bytes       table,
+                           OTV_Validator  otvalid )
+  {
+    FT_Bytes  p = table;
+    FT_UInt   CaretValueFormat;
+
+
+    OTV_ENTER;
+
+    OTV_LIMIT_CHECK( 4 );
+
+    CaretValueFormat = FT_NEXT_USHORT( p );
+
+    OTV_TRACE(( " (format = %d)\n", CaretValueFormat ));
+
+    switch ( CaretValueFormat )
+    {
+    case 1:     /* CaretValueFormat1 */
+      /* skip Coordinate, no test */
+      break;
+
+    case 2:     /* CaretValueFormat2 */
+      /* skip CaretValuePoint, no test */
+      break;
+
+    case 3:     /* CaretValueFormat3 */
+      p += 2;   /* skip Coordinate */
+
+      OTV_LIMIT_CHECK( 2 );
+
+      /* DeviceTable */
+      otv_Device_validate( table + FT_NEXT_USHORT( p ), otvalid );
+      break;
+
+    default:
+      FT_INVALID_FORMAT;
+    }
+
+    OTV_EXIT;
+  }
+
+
+  /*************************************************************************/
+  /*************************************************************************/
+  /*****                                                               *****/
+  /*****                         GDEF TABLE                            *****/
+  /*****                                                               *****/
+  /*************************************************************************/
+  /*************************************************************************/
+
+  /* sets otvalid->glyph_count */
+
+  FT_LOCAL_DEF( void )
+  otv_GDEF_validate( FT_Bytes      table,
+                     FT_Bytes      gsub,
+                     FT_Bytes      gpos,
+                     FT_UInt       glyph_count,
+                     FT_Validator  ftvalid )
+  {
+    OTV_ValidatorRec  otvalidrec;
+    OTV_Validator     otvalid = &otvalidrec;
+    FT_Bytes          p     = table;
+    FT_UInt           table_size;
+    FT_Bool           need_MarkAttachClassDef;
+
+    OTV_OPTIONAL_TABLE( GlyphClassDef );
+    OTV_OPTIONAL_TABLE( AttachListOffset );
+    OTV_OPTIONAL_TABLE( LigCaretListOffset );
+    OTV_OPTIONAL_TABLE( MarkAttachClassDef );
+
+
+    otvalid->root = ftvalid;
+
+    FT_TRACE3(( "validating GDEF table\n" ));
+    OTV_INIT;
+
+    OTV_LIMIT_CHECK( 12 );
+
+    if ( FT_NEXT_ULONG( p ) != 0x10000UL )          /* Version */
+      FT_INVALID_FORMAT;
+
+    /* MarkAttachClassDef has been added to the OpenType */
+    /* specification without increasing GDEF's version,  */
+    /* so we use this ugly hack to find out whether the  */
+    /* table is needed actually.                         */
+
+    need_MarkAttachClassDef = FT_BOOL(
+      otv_GSUBGPOS_have_MarkAttachmentType_flag( gsub ) ||
+      otv_GSUBGPOS_have_MarkAttachmentType_flag( gpos ) );
+
+    if ( need_MarkAttachClassDef )
+      table_size = 12;              /* OpenType >= 1.2 */
+    else
+      table_size = 10;              /* OpenType < 1.2  */
+
+    otvalid->glyph_count = glyph_count;
+
+    OTV_OPTIONAL_OFFSET( GlyphClassDef );
+    OTV_SIZE_CHECK( GlyphClassDef );
+    if ( GlyphClassDef )
+      otv_ClassDef_validate( table + GlyphClassDef, otvalid );
+
+    OTV_OPTIONAL_OFFSET( AttachListOffset );
+    OTV_SIZE_CHECK( AttachListOffset );
+    if ( AttachListOffset )
+    {
+      OTV_NEST2( AttachList, AttachPoint );
+      OTV_RUN( table + AttachListOffset, otvalid );
+    }
+
+    OTV_OPTIONAL_OFFSET( LigCaretListOffset );
+    OTV_SIZE_CHECK( LigCaretListOffset );
+    if ( LigCaretListOffset )
+    {
+      OTV_NEST3( LigCaretList, LigGlyph, CaretValue );
+      OTV_RUN( table + LigCaretListOffset, otvalid );
+    }
+
+    if ( need_MarkAttachClassDef )
+    {
+      OTV_OPTIONAL_OFFSET( MarkAttachClassDef );
+      OTV_SIZE_CHECK( MarkAttachClassDef );
+      if ( MarkAttachClassDef )
+        otv_ClassDef_validate( table + MarkAttachClassDef, otvalid );
+    }
+
+    FT_TRACE4(( "\n" ));
+  }
+
+
+/* END */