Roll HarfBuzz to 1.1.3

third_party/harfbuzz-ng/src/hb-common.h

 /*
  * Copyright © 2007,2008,2009  Red Hat, Inc.
  * Copyright © 2011,2012  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
@@ skipping 80 matching lines @@
 typedef uint32_t hb_tag_t;
 
 #define HB_TAG(c1,c2,c3,c4) ((hb_tag_t)((((uint8_t)(c1))<<24)|(((uint8_t)(c2))<<16)|(((uint8_t)(c3))<<8)|((uint8_t)(c4))))
 #define HB_UNTAG(tag)   ((uint8_t)((tag)>>24)), ((uint8_t)((tag)>>16)), ((uint8_t)((tag)>>8)), ((uint8_t)(tag))
 
 #define HB_TAG_NONE HB_TAG(0,0,0,0)
 #define HB_TAG_MAX HB_TAG(0xff,0xff,0xff,0xff)
 #define HB_TAG_MAX_SIGNED HB_TAG(0x7f,0xff,0xff,0xff)
 
 /* len=-1 means str is NUL-terminated. */
-hb_tag_t
+HB_EXTERN hb_tag_t
 hb_tag_from_string (const char *str, int len);
 
 /* buf should have 4 bytes. */
-void
+HB_EXTERN void
 hb_tag_to_string (hb_tag_t tag, char *buf);
 
 
-/* hb_direction_t */
-
+/**
+ * hb_direction_t:
+ * @HB_DIRECTION_INVALID: Initial, unset direction.
+ * @HB_DIRECTION_LTR: Text is set horizontally from left to right.
+ * @HB_DIRECTION_RTL: Text is set horizontally from right to left.
+ * @HB_DIRECTION_TTB: Text is set vertically from top to bottom.
+ * @HB_DIRECTION_BTT: Text is set vertically from bottom to top.
+ */
 typedef enum {
   HB_DIRECTION_INVALID = 0,
   HB_DIRECTION_LTR = 4,
   HB_DIRECTION_RTL,
   HB_DIRECTION_TTB,
   HB_DIRECTION_BTT
 } hb_direction_t;
 
 /* len=-1 means str is NUL-terminated */
-hb_direction_t
+HB_EXTERN hb_direction_t
 hb_direction_from_string (const char *str, int len);
 
-const char *
+HB_EXTERN const char *
 hb_direction_to_string (hb_direction_t direction);
 
 #define HB_DIRECTION_IS_VALID(dir)      ((((unsigned int) (dir)) & ~3U) == 4)
 /* Direction must be valid for the following */
 #define HB_DIRECTION_IS_HORIZONTAL(dir) ((((unsigned int) (dir)) & ~1U) == 4)
 #define HB_DIRECTION_IS_VERTICAL(dir)   ((((unsigned int) (dir)) & ~1U) == 6)
 #define HB_DIRECTION_IS_FORWARD(dir)    ((((unsigned int) (dir)) & ~2U) == 4)
 #define HB_DIRECTION_IS_BACKWARD(dir)   ((((unsigned int) (dir)) & ~2U) == 5)
 #define HB_DIRECTION_REVERSE(dir)       ((hb_direction_t) (((unsigned int) (dir)) ^ 1))
 
 
 /* hb_language_t */
 
 typedef const struct hb_language_impl_t *hb_language_t;
 
-/* len=-1 means str is NUL-terminated */
-hb_language_t
+HB_EXTERN hb_language_t
 hb_language_from_string (const char *str, int len);
 
-const char *
+HB_EXTERN const char *
 hb_language_to_string (hb_language_t language);
 
 #define HB_LANGUAGE_INVALID ((hb_language_t) NULL)
 
-hb_language_t
+HB_EXTERN hb_language_t
 hb_language_get_default (void);
 
 
 /* hb_script_t */
 
 /* http://unicode.org/iso15924/ */
 /* http://goo.gl/x9ilM */
 /* Unicode Character Database property: Script (sc) */
 typedef enum
 {
@@ skipping 158 matching lines @@
    *   http://lists.freedesktop.org/archives/harfbuzz/2014-March/004150.html
    */
   _HB_SCRIPT_MAX_VALUE                          = HB_TAG_MAX, /*< skip >*/
   _HB_SCRIPT_MAX_VALUE_SIGNED                   = HB_TAG_MAX_SIGNED /*< skip >*/
 
 } hb_script_t;
 
 
 /* Script functions */
 
-hb_script_t
+HB_EXTERN hb_script_t
 hb_script_from_iso15924_tag (hb_tag_t tag);
 
-/* sugar for tag_from_string() then script_from_iso15924_tag */
-/* len=-1 means s is NUL-terminated */
-hb_script_t
-hb_script_from_string (const char *s, int len);
+HB_EXTERN hb_script_t
+hb_script_from_string (const char *str, int len);
 
-hb_tag_t
+HB_EXTERN hb_tag_t
 hb_script_to_iso15924_tag (hb_script_t script);
 
-hb_direction_t
+HB_EXTERN hb_direction_t
 hb_script_get_horizontal_direction (hb_script_t script);
 
 
 /* User data */
 
 typedef struct hb_user_data_key_t {
   /*< private >*/
   char unused;
 } hb_user_data_key_t;
 
 typedef void (*hb_destroy_func_t) (void *user_data);
 
 
 HB_END_DECLS
 
 #endif /* HB_COMMON_H */