Add hb-ot-shape-complex-arabic-private.hh

src/Makefile.am

diff --git a/src/Makefile.am b/src/Makefile.am
index 6258dd7..a528c9d 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -93,6 +93,7 @@
 	hb-ot-shape.cc \
 	hb-ot-shape-complex-arabic.cc \
 	hb-ot-shape-complex-arabic-fallback.hh \
+	hb-ot-shape-complex-arabic-private.hh \
 	hb-ot-shape-complex-arabic-table.hh \
 	hb-ot-shape-complex-arabic-win1256.hh \
 	hb-ot-shape-complex-default.cc \

src/hb-ot-shape-complex-arabic-private.hh

diff --git a/src/hb-ot-shape-complex-arabic-private.hh b/src/hb-ot-shape-complex-arabic-private.hh
new file mode 100644
index 0000000..fcedc7d
--- /dev/null
+++ b/src/hb-ot-shape-complex-arabic-private.hh
@@ -0,0 +1,50 @@
+/*
+ * Copyright © 2015  Mozilla Foundation.
+ * Copyright © 2015  Google, Inc.
+ *
+ *  This is part of HarfBuzz, a text shaping library.
+ *
+ * Permission is hereby granted, without written agreement and without
+ * license or royalty fees, to use, copy, modify, and distribute this
+ * software and its documentation for any purpose, provided that the
+ * above copyright notice and the following two paragraphs appear in
+ * all copies of this software.
+ *
+ * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
+ * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
+ * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
+ * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
+ * DAMAGE.
+ *
+ * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
+ * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
+ * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
+ * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
+ *
+ * Mozilla Author(s): Jonathan Kew
+ * Google Author(s): Behdad Esfahbod
+ */
+
+#ifndef HB_OT_SHAPE_COMPLEX_ARABIC_PRIVATE_HH
+#define HB_OT_SHAPE_COMPLEX_ARABIC_PRIVATE_HH
+
+#include "hb-private.hh"
+
+#include "hb-ot-shape-complex-private.hh"
+
+
+struct arabic_shape_plan_t;
+
+HB_INTERNAL void *
+data_create_arabic (const hb_ot_shape_plan_t *plan);
+
+HB_INTERNAL void
+data_destroy_arabic (void *data);
+
+HB_INTERNAL void
+setup_masks_arabic_plan (const arabic_shape_plan_t *arabic_plan,
+			 hb_buffer_t               *buffer,
+			 hb_script_t                script);
+
+#endif /* HB_OT_SHAPE_COMPLEX_ARABIC_PRIVATE_HH */

src/hb-ot-shape-complex-arabic.cc

diff --git a/src/hb-ot-shape-complex-arabic.cc b/src/hb-ot-shape-complex-arabic.cc
index fc82581..cde02e0 100644
--- a/src/hb-ot-shape-complex-arabic.cc
+++ b/src/hb-ot-shape-complex-arabic.cc
@@ -24,7 +24,7 @@
  * Google Author(s): Behdad Esfahbod
  */
 
-#include "hb-ot-shape-complex-private.hh"
+#include "hb-ot-shape-complex-arabic-private.hh"
 #include "hb-ot-shape-private.hh"
 
 
@@ -33,9 +33,13 @@
 
 
 /*
+ * Joining types:
+ */
+
+/*
  * Bits used in the joining tables
  */
-enum {
+enum hb_arabic_joining_type_t {
   JOINING_TYPE_U		= 0,
   JOINING_TYPE_L		= 1,
   JOINING_TYPE_R		= 2,
@@ -49,10 +53,6 @@
   JOINING_TYPE_X = 8  /* means: use general-category to choose between U or T. */
 };
 
-/*
- * Joining types:
- */
-
 #include "hb-ot-shape-complex-arabic-table.hh"
 
 static unsigned int get_joining_type (hb_codepoint_t u, hb_unicode_general_category_t gen_cat)
@@ -212,7 +212,7 @@
   arabic_fallback_plan_t *fallback_plan;
 };
 
-static void *
+void *
 data_create_arabic (const hb_ot_shape_plan_t *plan)
 {
   arabic_shape_plan_t *arabic_plan = (arabic_shape_plan_t *) calloc (1, sizeof (arabic_shape_plan_t));
@@ -230,7 +230,7 @@
   return arabic_plan;
 }
 
-static void
+void
 data_destroy_arabic (void *data)
 {
   arabic_shape_plan_t *arabic_plan = (arabic_shape_plan_t *) data;
@@ -305,17 +305,15 @@
       info[i].arabic_shaping_action() = info[i - 1].arabic_shaping_action();
 }
 
-static void
-setup_masks_arabic (const hb_ot_shape_plan_t *plan,
-		    hb_buffer_t              *buffer,
-		    hb_font_t                *font HB_UNUSED)
+void
+setup_masks_arabic_plan (const arabic_shape_plan_t *arabic_plan,
+			 hb_buffer_t               *buffer,
+			 hb_script_t                script)
 {
   HB_BUFFER_ALLOCATE_VAR (buffer, arabic_shaping_action);
 
-  const arabic_shape_plan_t *arabic_plan = (const arabic_shape_plan_t *) plan->data;
-
   arabic_joining (buffer);
-  if (plan->props.script == HB_SCRIPT_MONGOLIAN)
+  if (script == HB_SCRIPT_MONGOLIAN)
     mongolian_variation_selectors (buffer);
 
   unsigned int count = buffer->len;
@@ -326,6 +324,15 @@
   HB_BUFFER_DEALLOCATE_VAR (buffer, arabic_shaping_action);
 }
 
+static void
+setup_masks_arabic (const hb_ot_shape_plan_t *plan,
+		    hb_buffer_t              *buffer,
+		    hb_font_t                *font HB_UNUSED)
+{
+  const arabic_shape_plan_t *arabic_plan = (const arabic_shape_plan_t *) plan->data;
+  setup_masks_arabic_plan (arabic_plan, buffer, plan->props.script);
+}
+
 
 static void
 nuke_joiners (const hb_ot_shape_plan_t *plan HB_UNUSED,