Update freetype sources (2.6.2) in third party.

third_party/freetype2/src/src/otvalid/otvjstf.c

Index: third_party/freetype2/src/src/otvalid/otvjstf.c
diff --git a/third_party/freetype2/src/src/otvalid/otvjstf.c b/third_party/freetype2/src/src/otvalid/otvjstf.c
new file mode 100644
index 0000000000000000000000000000000000000000..fe68a60f609591c1ab6f0e2184820027558bf4b6
--- /dev/null
+++ b/third_party/freetype2/src/src/otvalid/otvjstf.c
@@ -0,0 +1,259 @@
+/***************************************************************************/
+/*                                                                         */
+/*  otvjstf.c                                                              */
+/*                                                                         */
+/*    OpenType JSTF 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"
+#include "otvgpos.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_otvjstf
+
+
+#define JstfPriorityFunc  otv_JstfPriority_validate
+#define JstfLookupFunc    otv_GPOS_subtable_validate
+
+  /* uses otvalid->extra1 (GSUB lookup count) */
+  /* uses otvalid->extra2 (GPOS lookup count) */
+  /* sets otvalid->extra1 (counter)           */
+
+  static void
+  otv_JstfPriority_validate( FT_Bytes       table,
+                             OTV_Validator  otvalid )
+  {
+    FT_Bytes  p = table;
+    FT_UInt   table_size;
+    FT_UInt   gsub_lookup_count, gpos_lookup_count;
+
+    OTV_OPTIONAL_TABLE( ShrinkageEnableGSUB  );
+    OTV_OPTIONAL_TABLE( ShrinkageDisableGSUB );
+    OTV_OPTIONAL_TABLE( ShrinkageEnableGPOS  );
+    OTV_OPTIONAL_TABLE( ShrinkageDisableGPOS );
+    OTV_OPTIONAL_TABLE( ExtensionEnableGSUB  );
+    OTV_OPTIONAL_TABLE( ExtensionDisableGSUB );
+    OTV_OPTIONAL_TABLE( ExtensionEnableGPOS  );
+    OTV_OPTIONAL_TABLE( ExtensionDisableGPOS );
+    OTV_OPTIONAL_TABLE( ShrinkageJstfMax );
+    OTV_OPTIONAL_TABLE( ExtensionJstfMax );
+
+
+    OTV_ENTER;
+    OTV_TRACE(( "JstfPriority table\n" ));
+
+    OTV_LIMIT_CHECK( 20 );
+
+    gsub_lookup_count = otvalid->extra1;
+    gpos_lookup_count = otvalid->extra2;
+
+    table_size = 20;
+
+    otvalid->extra1 = gsub_lookup_count;
+
+    OTV_OPTIONAL_OFFSET( ShrinkageEnableGSUB );
+    OTV_SIZE_CHECK( ShrinkageEnableGSUB );
+    if ( ShrinkageEnableGSUB )
+      otv_x_ux( table + ShrinkageEnableGSUB, otvalid );
+
+    OTV_OPTIONAL_OFFSET( ShrinkageDisableGSUB );
+    OTV_SIZE_CHECK( ShrinkageDisableGSUB );
+    if ( ShrinkageDisableGSUB )
+      otv_x_ux( table + ShrinkageDisableGSUB, otvalid );
+
+    otvalid->extra1 = gpos_lookup_count;
+
+    OTV_OPTIONAL_OFFSET( ShrinkageEnableGPOS );
+    OTV_SIZE_CHECK( ShrinkageEnableGPOS );
+    if ( ShrinkageEnableGPOS )
+      otv_x_ux( table + ShrinkageEnableGPOS, otvalid );
+
+    OTV_OPTIONAL_OFFSET( ShrinkageDisableGPOS );
+    OTV_SIZE_CHECK( ShrinkageDisableGPOS );
+    if ( ShrinkageDisableGPOS )
+      otv_x_ux( table + ShrinkageDisableGPOS, otvalid );
+
+    OTV_OPTIONAL_OFFSET( ShrinkageJstfMax );
+    OTV_SIZE_CHECK( ShrinkageJstfMax );
+    if ( ShrinkageJstfMax )
+    {
+      /* XXX: check lookup types? */
+      OTV_NEST2( JstfMax, JstfLookup );
+      OTV_RUN( table + ShrinkageJstfMax, otvalid );
+    }
+
+    otvalid->extra1 = gsub_lookup_count;
+
+    OTV_OPTIONAL_OFFSET( ExtensionEnableGSUB );
+    OTV_SIZE_CHECK( ExtensionEnableGSUB );
+    if ( ExtensionEnableGSUB )
+      otv_x_ux( table + ExtensionEnableGSUB, otvalid );
+
+    OTV_OPTIONAL_OFFSET( ExtensionDisableGSUB );
+    OTV_SIZE_CHECK( ExtensionDisableGSUB );
+    if ( ExtensionDisableGSUB )
+      otv_x_ux( table + ExtensionDisableGSUB, otvalid );
+
+    otvalid->extra1 = gpos_lookup_count;
+
+    OTV_OPTIONAL_OFFSET( ExtensionEnableGPOS );
+    OTV_SIZE_CHECK( ExtensionEnableGPOS );
+    if ( ExtensionEnableGPOS )
+      otv_x_ux( table + ExtensionEnableGPOS, otvalid );
+
+    OTV_OPTIONAL_OFFSET( ExtensionDisableGPOS );
+    OTV_SIZE_CHECK( ExtensionDisableGPOS );
+    if ( ExtensionDisableGPOS )
+      otv_x_ux( table + ExtensionDisableGPOS, otvalid );
+
+    OTV_OPTIONAL_OFFSET( ExtensionJstfMax );
+    OTV_SIZE_CHECK( ExtensionJstfMax );
+    if ( ExtensionJstfMax )
+    {
+      /* XXX: check lookup types? */
+      OTV_NEST2( JstfMax, JstfLookup );
+      OTV_RUN( table + ExtensionJstfMax, otvalid );
+    }
+
+    otvalid->extra1 = gsub_lookup_count;
+    otvalid->extra2 = gpos_lookup_count;
+
+    OTV_EXIT;
+  }
+
+
+  /* sets otvalid->extra (glyph count)               */
+  /* sets otvalid->func1 (otv_JstfPriority_validate) */
+
+  static void
+  otv_JstfScript_validate( FT_Bytes       table,
+                           OTV_Validator  otvalid )
+  {
+    FT_Bytes  p = table;
+    FT_UInt   table_size;
+    FT_UInt   JstfLangSysCount;
+
+    OTV_OPTIONAL_TABLE( ExtGlyph );
+    OTV_OPTIONAL_TABLE( DefJstfLangSys );
+
+
+    OTV_NAME_ENTER( "JstfScript" );
+
+    OTV_LIMIT_CHECK( 6 );
+    OTV_OPTIONAL_OFFSET( ExtGlyph );
+    OTV_OPTIONAL_OFFSET( DefJstfLangSys );
+    JstfLangSysCount = FT_NEXT_USHORT( p );
+
+    OTV_TRACE(( " (JstfLangSysCount = %d)\n", JstfLangSysCount ));
+
+    table_size = JstfLangSysCount * 6 + 6;
+
+    OTV_SIZE_CHECK( ExtGlyph );
+    if ( ExtGlyph )
+    {
+      otvalid->extra1 = otvalid->glyph_count;
+      OTV_NEST1( ExtenderGlyph );
+      OTV_RUN( table + ExtGlyph, otvalid );
+    }
+
+    OTV_SIZE_CHECK( DefJstfLangSys );
+    if ( DefJstfLangSys )
+    {
+      OTV_NEST2( JstfLangSys, JstfPriority );
+      OTV_RUN( table + DefJstfLangSys, otvalid );
+    }
+
+    OTV_LIMIT_CHECK( 6 * JstfLangSysCount );
+
+    /* JstfLangSysRecord */
+    OTV_NEST2( JstfLangSys, JstfPriority );
+    for ( ; JstfLangSysCount > 0; JstfLangSysCount-- )
+    {
+      p += 4;       /* skip JstfLangSysTag */
+
+      OTV_RUN( table + FT_NEXT_USHORT( p ), otvalid );
+    }
+
+    OTV_EXIT;
+  }
+
+
+  /* sets otvalid->extra1 (GSUB lookup count) */
+  /* sets otvalid->extra2 (GPOS lookup count) */
+  /* sets otvalid->glyph_count                */
+
+  FT_LOCAL_DEF( void )
+  otv_JSTF_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           JstfScriptCount;
+
+
+    otvalid->root = ftvalid;
+
+
+    FT_TRACE3(( "validating JSTF table\n" ));
+    OTV_INIT;
+
+    OTV_LIMIT_CHECK( 6 );
+
+    if ( FT_NEXT_ULONG( p ) != 0x10000UL )      /* Version */
+      FT_INVALID_FORMAT;
+
+    JstfScriptCount = FT_NEXT_USHORT( p );
+
+    FT_TRACE3(( " (JstfScriptCount = %d)\n", JstfScriptCount ));
+
+    OTV_LIMIT_CHECK( JstfScriptCount * 6 );
+
+    if ( gsub )
+      otvalid->extra1 = otv_GSUBGPOS_get_Lookup_count( gsub );
+    else
+      otvalid->extra1 = 0;
+
+    if ( gpos )
+      otvalid->extra2 = otv_GSUBGPOS_get_Lookup_count( gpos );
+    else
+      otvalid->extra2 = 0;
+
+    otvalid->glyph_count = glyph_count;
+
+    /* JstfScriptRecord */
+    for ( ; JstfScriptCount > 0; JstfScriptCount-- )
+    {
+      p += 4;       /* skip JstfScriptTag */
+
+      /* JstfScript */
+      otv_JstfScript_validate( table + FT_NEXT_USHORT( p ), otvalid );
+    }
+
+    FT_TRACE4(( "\n" ));
+  }
+
+
+/* END */