Add script and language to buffer

TODO

-- cmap14 support in get_glyph callback
 - Use size_t in sanitize?
 - Buffer error handling?
 - Better define HB_INTERNAL

src/hb-buffer-private.h

@@ -71,10 +71,10 @@ struct _hb_buffer_t {
   hb_reference_count_t ref_count;
 
   /* Information about how the text in the buffer should be treated */
-
   hb_unicode_funcs_t *unicode;
-  hb_direction_t       direction;
-
+  hb_direction_t      direction;
+  hb_script_t         script;
+  hb_language_t       language;
 
   /* Buffer contents */
 

src/hb-buffer.c

@@ -146,6 +146,32 @@ hb_buffer_get_direction (hb_buffer_t    *buffer)
   return buffer->direction;
 }
 
+void
+hb_buffer_set_script (hb_buffer_t *buffer,
+		      hb_script_t  script)
+{
+  buffer->script = script;
+}
+
+hb_script_t
+hb_buffer_get_script (hb_buffer_t *buffer)
+{
+  return buffer->script;
+}
+
+void
+hb_buffer_set_language (hb_buffer_t   *buffer,
+			hb_language_t  language)
+{
+  buffer->language = language;
+}
+
+hb_language_t
+hb_buffer_get_language (hb_buffer_t *buffer)
+{
+  return buffer->language;
+}
+
 
 void
 hb_buffer_clear (hb_buffer_t *buffer)

src/hb-buffer.h

@@ -30,6 +30,7 @@
 
 #include "hb-common.h"
 #include "hb-unicode.h"
+#include "hb-language.h"
 
 HB_BEGIN_DECLS
 
@@ -88,7 +89,6 @@ hb_buffer_set_unicode_funcs (hb_buffer_t        *buffer,
 hb_unicode_funcs_t *
 hb_buffer_get_unicode_funcs (hb_buffer_t        *buffer);
 
-
 void
 hb_buffer_set_direction (hb_buffer_t    *buffer,
 			 hb_direction_t  direction);
@@ -96,6 +96,19 @@ hb_buffer_set_direction (hb_buffer_t    *buffer,
 hb_direction_t
 hb_buffer_get_direction (hb_buffer_t *buffer);
 
+void
+hb_buffer_set_script (hb_buffer_t *buffer,
+		      hb_script_t  script);
+
+hb_script_t
+hb_buffer_get_script (hb_buffer_t *buffer);
+
+void
+hb_buffer_set_language (hb_buffer_t   *buffer,
+			hb_language_t  language);
+
+hb_language_t
+hb_buffer_get_language (hb_buffer_t *buffer);
 
 
 void