diff --git a/src/hb-array.hh b/src/hb-array.hh
index 09d10b4..d9adf2c 100644
--- a/src/hb-array.hh
+++ b/src/hb-array.hh
@@ -196,6 +196,15 @@
   const T *as () const
   { return length < hb_null_size (T) ? &Null (T) : reinterpret_cast<const T *> (arrayZ); }
 
+  template <typename T,
+	    unsigned P = sizeof (Type),
+	    hb_enable_if (P == 1)>
+  bool in_range (const T *p, unsigned int size = T::static_size) const
+  {
+    return ((const char *) p) >= arrayZ
+	&& ((const char *) p + size) <= arrayZ + length;
+  }
+
   /* Only call if you allocated the underlying array using malloc() or similar. */
   void free ()
   { ::free ((void *) arrayZ); arrayZ = nullptr; length = 0; }
diff --git a/src/hb-ot-glyf-table.hh b/src/hb-ot-glyf-table.hh
index 44f84ec..571e50e 100644
--- a/src/hb-ot-glyf-table.hh
+++ b/src/hb-ot-glyf-table.hh
@@ -360,9 +360,9 @@
   {
     typedef const CompositeGlyphChain *__item_t__;
     composite_iter_t (hb_bytes_t glyph_, __item_t__ current_) :
-      glyph (glyph_), current (current_), checker (range_checker_t (glyph.arrayZ, glyph.length))
+      glyph (glyph_), current (current_)
     { if (!in_range (current)) current = nullptr; }
-    composite_iter_t () : glyph (hb_bytes_t ()), current (nullptr), checker (range_checker_t (nullptr, 0)) {}
+    composite_iter_t () : glyph (hb_bytes_t ()), current (nullptr) {}
 
     const CompositeGlyphChain &__item__ () const { return *current; }
     bool __more__ () const { return current; }
@@ -380,14 +380,13 @@
 
     bool in_range (const CompositeGlyphChain *composite) const
     {
-      return checker.in_range (composite, CompositeGlyphChain::min_size)
-	  && checker.in_range (composite, composite->get_size ());
+      return glyph.in_range (composite, CompositeGlyphChain::min_size)
+	  && glyph.in_range (composite, composite->get_size ());
     }
 
     private:
     hb_bytes_t glyph;
     __item_t__ current;
-    range_checker_t checker;
   };
 
   struct Glyph
@@ -537,7 +536,7 @@
       template <typename T>
       static bool read_points (const HBUINT8 *&p /* IN/OUT */,
 			       contour_point_vector_t &points_ /* IN/OUT */,
-			       const range_checker_t &checker)
+			       const hb_bytes_t &bytes)
       {
 	T coord_setter;
 	float v = 0;
@@ -546,7 +545,7 @@
 	  uint8_t flag = points_[i].flag;
 	  if (coord_setter.is_short (flag))
 	  {
-	    if (unlikely (!checker.in_range (p))) return false;
+	    if (unlikely (!bytes.in_range (p))) return false;
 	    if (coord_setter.is_same (flag))
 	      v += *p++;
 	    else
@@ -556,7 +555,7 @@
 	  {
 	    if (!coord_setter.is_same (flag))
 	    {
-	      if (unlikely (!checker.in_range ((const HBUINT16 *) p))) return false;
+	      if (unlikely (!bytes.in_range ((const HBUINT16 *) p))) return false;
 	      v += *(const HBINT16 *) p;
 	      p += HBINT16::static_size;
 	    }
@@ -571,9 +570,8 @@
 			       const bool phantom_only=false) const
       {
 	const HBUINT16 *endPtsOfContours = &StructAfter<HBUINT16> (header);
-	range_checker_t checker (bytes.arrayZ, bytes.length);
 	int num_contours = header.numberOfContours;
-	if (unlikely (!checker.in_range (&endPtsOfContours[num_contours + 1]))) return false;
+	if (unlikely (!bytes.in_range (&endPtsOfContours[num_contours + 1]))) return false;
 	unsigned int num_points = endPtsOfContours[num_contours - 1] + 1;
 
 	points_.resize (num_points + PHANTOM_COUNT);
@@ -593,12 +591,12 @@
 	/* Read flags */
 	for (unsigned int i = 0; i < num_points; i++)
 	{
-	  if (unlikely (!checker.in_range (p))) return false;
+	  if (unlikely (!bytes.in_range (p))) return false;
 	  uint8_t flag = *p++;
 	  points_[i].flag = flag;
 	  if (flag & FLAG_REPEAT)
 	  {
-	    if (unlikely (!checker.in_range (p))) return false;
+	    if (unlikely (!bytes.in_range (p))) return false;
 	    unsigned int repeat_count = *p++;
 	    while ((repeat_count-- > 0) && (++i < num_points))
 	      points_[i].flag = flag;
@@ -606,8 +604,8 @@
 	}
 
 	/* Read x & y coordinates */
-	return (read_points<x_setter_t> (p, points_, checker) &&
-		read_points<y_setter_t> (p, points_, checker));
+	return (read_points<x_setter_t> (p, points_, bytes) &&
+		read_points<y_setter_t> (p, points_, bytes));
       }
     };
 
@@ -949,7 +947,7 @@
 
     bool get_extents_var (hb_font_t *font, hb_codepoint_t gid,
 			  hb_glyph_extents_t *extents) const
-    { return get_var_extents_and_phantoms (font, gid,  extents); }
+    { return get_var_extents_and_phantoms (font, gid, extents); }
 #endif
 
     public:
diff --git a/src/hb-ot-var-gvar-table.hh b/src/hb-ot-var-gvar-table.hh
index 666b308..a76121d 100644
--- a/src/hb-ot-var-gvar-table.hh
+++ b/src/hb-ot-var-gvar-table.hh
@@ -78,23 +78,6 @@
   }
 };
 
-struct range_checker_t
-{
-  range_checker_t (const void *data_, unsigned int length_)
-    : data ((const char *) data_), length (length_) {}
-
-  template <typename T>
-  bool in_range (const T *p, unsigned int size = T::static_size) const
-  {
-    return ((const char *) p) >= data
-	&& ((const char *) p + size) <= data + length;
-  }
-
-  protected:
-  const char *data;
-  const unsigned int length;
-};
-
 struct Tuple : UnsizedArrayOf<F2DOT14> {};
 
 struct TuppleIndex : HBUINT16
@@ -233,10 +216,10 @@
     {
       if (var_data->has_shared_point_numbers ())
       {
-	range_checker_t checker (var_data, length);
+	hb_bytes_t bytes ((const char *) var_data, length);
 	const HBUINT8 *base = &(var_data+var_data->data);
 	const HBUINT8 *p = base;
-	if (!unpack_points (p, shared_indices, checker)) return false;
+	if (!unpack_points (p, shared_indices, bytes)) return false;
 	data_offset = p - base;
       }
       return true;
@@ -292,7 +275,7 @@
 
   static bool unpack_points (const HBUINT8 *&p /* IN/OUT */,
 			     hb_vector_t<unsigned int> &points /* OUT */,
-			     const range_checker_t &check)
+			     const hb_bytes_t &bytes)
   {
     enum packed_point_flag_t
     {
@@ -300,12 +283,12 @@
       POINT_RUN_COUNT_MASK = 0x7F
     };
 
-    if (unlikely (!check.in_range (p))) return false;
+    if (unlikely (!bytes.in_range (p))) return false;
 
     uint16_t count = *p++;
     if (count & POINTS_ARE_WORDS)
     {
-      if (unlikely (!check.in_range (p))) return false;
+      if (unlikely (!bytes.in_range (p))) return false;
       count = ((count & POINT_RUN_COUNT_MASK) << 8) | *p++;
     }
     points.resize (count);
@@ -314,7 +297,7 @@
     uint16_t i = 0;
     while (i < count)
     {
-      if (unlikely (!check.in_range (p))) return false;
+      if (unlikely (!bytes.in_range (p))) return false;
       uint16_t j;
       uint8_t control = *p++;
       uint16_t run_count = (control & POINT_RUN_COUNT_MASK) + 1;
@@ -322,7 +305,7 @@
       {
 	for (j = 0; j < run_count && i < count; j++, i++)
 	{
-	  if (unlikely (!check.in_range ((const HBUINT16 *) p)))
+	  if (unlikely (!bytes.in_range ((const HBUINT16 *) p)))
 	    return false;
 	  n += *(const HBUINT16 *)p;
 	  points[i] = n;
@@ -333,7 +316,7 @@
       {
 	for (j = 0; j < run_count && i < count; j++, i++)
 	{
-	  if (unlikely (!check.in_range (p))) return false;
+	  if (unlikely (!bytes.in_range (p))) return false;
 	  n += *p++;
 	  points[i] = n;
 	}
@@ -345,7 +328,7 @@
 
   static bool unpack_deltas (const HBUINT8 *&p /* IN/OUT */,
 			     hb_vector_t<int> &deltas /* IN/OUT */,
-			     const range_checker_t &check)
+			     const hb_bytes_t &bytes)
   {
     enum packed_delta_flag_t
     {
@@ -358,7 +341,7 @@
     unsigned int count = deltas.length;
     while (i < count)
     {
-      if (unlikely (!check.in_range (p))) return false;
+      if (unlikely (!bytes.in_range (p))) return false;
       uint8_t control = *p++;
       unsigned int run_count = (control & DELTA_RUN_COUNT_MASK) + 1;
       unsigned int j;
@@ -368,7 +351,7 @@
       else if (control & DELTAS_ARE_WORDS)
 	for (j = 0; j < run_count && i < count; j++, i++)
 	{
-	  if (unlikely (!check.in_range ((const HBUINT16 *) p)))
+	  if (unlikely (!bytes.in_range ((const HBUINT16 *) p)))
 	    return false;
 	  deltas[i] = *(const HBINT16 *) p;
 	  p += HBUINT16::static_size;
@@ -376,7 +359,7 @@
       else
 	for (j = 0; j < run_count && i < count; j++, i++)
 	{
-	  if (unlikely (!check.in_range (p)))
+	  if (unlikely (!bytes.in_range (p)))
 	    return false;
 	  deltas[i] = *(const HBINT8 *) p++;
 	}
@@ -611,10 +594,10 @@
 	if (unlikely (!iterator.in_range (p, length)))
 	  return false;
 
-	range_checker_t checker (p, length);
+	hb_bytes_t bytes ((const char *) p, length);
 	hb_vector_t<unsigned int> private_indices;
 	if (iterator.current_tuple->has_private_points () &&
-	    !GlyphVarData::unpack_points (p, private_indices, checker))
+	    !GlyphVarData::unpack_points (p, private_indices, bytes))
 	  return false;
 	const hb_array_t<unsigned int> &indices = private_indices.length ? private_indices : shared_indices;
 
@@ -622,11 +605,11 @@
 	unsigned int num_deltas = apply_to_all ? points.length : indices.length;
 	hb_vector_t<int> x_deltas;
 	x_deltas.resize (num_deltas);
-	if (!GlyphVarData::unpack_deltas (p, x_deltas, checker))
+	if (!GlyphVarData::unpack_deltas (p, x_deltas, bytes))
 	  return false;
 	hb_vector_t<int> y_deltas;
 	y_deltas.resize (num_deltas);
-	if (!GlyphVarData::unpack_deltas (p, y_deltas, checker))
+	if (!GlyphVarData::unpack_deltas (p, y_deltas, bytes))
 	  return false;
 
 	for (unsigned int i = 0; i < deltas.length; i++)