Update freetype sources (2.6.2) in third party.

third_party/freetype2/src/src/sfnt/ttbdf.c

Index: third_party/freetype2/src/src/sfnt/ttbdf.c
diff --git a/third_party/freetype2/src/src/sfnt/ttbdf.c b/third_party/freetype2/src/src/sfnt/ttbdf.c
new file mode 100644
index 0000000000000000000000000000000000000000..098b781a146a51fa69e22f03958fee22212c0256
--- /dev/null
+++ b/third_party/freetype2/src/src/sfnt/ttbdf.c
@@ -0,0 +1,250 @@
+/***************************************************************************/
+/*                                                                         */
+/*  ttbdf.c                                                                */
+/*                                                                         */
+/*    TrueType and OpenType embedded BDF properties (body).                */
+/*                                                                         */
+/*  Copyright 2005-2015 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 <ft2build.h>
+#include FT_INTERNAL_DEBUG_H
+#include FT_INTERNAL_STREAM_H
+#include FT_TRUETYPE_TAGS_H
+#include "ttbdf.h"
+
+#include "sferrors.h"
+
+
+#ifdef TT_CONFIG_OPTION_BDF
+
+  /*************************************************************************/
+  /*                                                                       */
+  /* 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_ttbdf
+
+
+  FT_LOCAL_DEF( void )
+  tt_face_free_bdf_props( TT_Face  face )
+  {
+    TT_BDF  bdf = &face->bdf;
+
+
+    if ( bdf->loaded )
+    {
+      FT_Stream  stream = FT_FACE(face)->stream;
+
+
+      if ( bdf->table != NULL )
+        FT_FRAME_RELEASE( bdf->table );
+
+      bdf->table_end    = NULL;
+      bdf->strings      = NULL;
+      bdf->strings_size = 0;
+    }
+  }
+
+
+  static FT_Error
+  tt_face_load_bdf_props( TT_Face    face,
+                          FT_Stream  stream )
+  {
+    TT_BDF    bdf = &face->bdf;
+    FT_ULong  length;
+    FT_Error  error;
+
+
+    FT_ZERO( bdf );
+
+    error = tt_face_goto_table( face, TTAG_BDF, stream, &length );
+    if ( error                                  ||
+         length < 8                             ||
+         FT_FRAME_EXTRACT( length, bdf->table ) )
+    {
+      error = FT_THROW( Invalid_Table );
+      goto Exit;
+    }
+
+    bdf->table_end = bdf->table + length;
+
+    {
+      FT_Byte*   p           = bdf->table;
+      FT_UInt    version     = FT_NEXT_USHORT( p );
+      FT_UInt    num_strikes = FT_NEXT_USHORT( p );
+      FT_ULong   strings     = FT_NEXT_ULONG ( p );
+      FT_UInt    count;
+      FT_Byte*   strike;
+
+
+      if ( version != 0x0001                 ||
+           strings < 8                       ||
+           ( strings - 8 ) / 4 < num_strikes ||
+           strings + 1 > length              )
+      {
+        goto BadTable;
+      }
+
+      bdf->num_strikes  = num_strikes;
+      bdf->strings      = bdf->table + strings;
+      bdf->strings_size = length - strings;
+
+      count  = bdf->num_strikes;
+      p      = bdf->table + 8;
+      strike = p + count * 4;
+
+
+      for ( ; count > 0; count-- )
+      {
+        FT_UInt  num_items = FT_PEEK_USHORT( p + 2 );
+
+        /*
+         *  We don't need to check the value sets themselves, since this
+         *  is done later.
+         */
+        strike += 10 * num_items;
+
+        p += 4;
+      }
+
+      if ( strike > bdf->strings )
+        goto BadTable;
+    }
+
+    bdf->loaded = 1;
+
+  Exit:
+    return error;
+
+  BadTable:
+    FT_FRAME_RELEASE( bdf->table );
+    FT_ZERO( bdf );
+    error = FT_THROW( Invalid_Table );
+    goto Exit;
+  }
+
+
+  FT_LOCAL_DEF( FT_Error )
+  tt_face_find_bdf_prop( TT_Face           face,
+                         const char*       property_name,
+                         BDF_PropertyRec  *aprop )
+  {
+    TT_BDF     bdf   = &face->bdf;
+    FT_Size    size  = FT_FACE(face)->size;
+    FT_Error   error = FT_Err_Ok;
+    FT_Byte*   p;
+    FT_UInt    count;
+    FT_Byte*   strike;
+    FT_Offset  property_len;
+
+
+    aprop->type = BDF_PROPERTY_TYPE_NONE;
+
+    if ( bdf->loaded == 0 )
+    {
+      error = tt_face_load_bdf_props( face, FT_FACE( face )->stream );
+      if ( error )
+        goto Exit;
+    }
+
+    count  = bdf->num_strikes;
+    p      = bdf->table + 8;
+    strike = p + 4 * count;
+
+    error = FT_ERR( Invalid_Argument );
+
+    if ( size == NULL || property_name == NULL )
+      goto Exit;
+
+    property_len = ft_strlen( property_name );
+    if ( property_len == 0 )
+      goto Exit;
+
+    for ( ; count > 0; count-- )
+    {
+      FT_UInt  _ppem  = FT_NEXT_USHORT( p );
+      FT_UInt  _count = FT_NEXT_USHORT( p );
+
+      if ( _ppem == size->metrics.y_ppem )
+      {
+        count = _count;
+        goto FoundStrike;
+      }
+
+      strike += 10 * _count;
+    }
+    goto Exit;
+
+  FoundStrike:
+    p = strike;
+    for ( ; count > 0; count-- )
+    {
+      FT_UInt  type = FT_PEEK_USHORT( p + 4 );
+
+      if ( ( type & 0x10 ) != 0 )
+      {
+        FT_UInt32  name_offset = FT_PEEK_ULONG( p     );
+        FT_UInt32  value       = FT_PEEK_ULONG( p + 6 );
+
+        /* be a bit paranoid for invalid entries here */
+        if ( name_offset < bdf->strings_size                    &&
+             property_len < bdf->strings_size - name_offset     &&
+             ft_strncmp( property_name,
+                         (const char*)bdf->strings + name_offset,
+                         bdf->strings_size - name_offset ) == 0 )
+        {
+          switch ( type & 0x0F )
+          {
+          case 0x00:  /* string */
+          case 0x01:  /* atoms */
+            /* check that the content is really 0-terminated */
+            if ( value < bdf->strings_size &&
+                 ft_memchr( bdf->strings + value, 0, bdf->strings_size ) )
+            {
+              aprop->type   = BDF_PROPERTY_TYPE_ATOM;
+              aprop->u.atom = (const char*)bdf->strings + value;
+              error         = FT_Err_Ok;
+              goto Exit;
+            }
+            break;
+
+          case 0x02:
+            aprop->type      = BDF_PROPERTY_TYPE_INTEGER;
+            aprop->u.integer = (FT_Int32)value;
+            error            = FT_Err_Ok;
+            goto Exit;
+
+          case 0x03:
+            aprop->type       = BDF_PROPERTY_TYPE_CARDINAL;
+            aprop->u.cardinal = value;
+            error             = FT_Err_Ok;
+            goto Exit;
+
+          default:
+            ;
+          }
+        }
+      }
+      p += 10;
+    }
+
+  Exit:
+    return error;
+  }
+
+#endif /* TT_CONFIG_OPTION_BDF */
+
+
+/* END */