Roll harfbuzz-ng 3b8fd9c48f4bde368bf2d465c148b9743a9216ee

third_party/harfbuzz-ng/src/hb-unicode-private.hh

Index: third_party/harfbuzz-ng/src/hb-unicode-private.hh
diff --git a/third_party/harfbuzz-ng/src/hb-unicode-private.hh b/third_party/harfbuzz-ng/src/hb-unicode-private.hh
index 2ad8a4984e0e92c568e25b06571bdd5114c6e041..ddba1ace29cc046239f3c65f06b2a35d9feb28e8 100644
--- a/third_party/harfbuzz-ng/src/hb-unicode-private.hh
+++ b/third_party/harfbuzz-ng/src/hb-unicode-private.hh
@@ -97,11 +97,62 @@ extern HB_INTERNAL hb_unicode_funcs_t _hb_glib_unicode_funcs;
 extern HB_INTERNAL hb_unicode_funcs_t _hb_icu_unicode_funcs;
 #define _hb_unicode_funcs_default _hb_icu_unicode_funcs
 #else
+#define HB_UNICODE_FUNCS_NIL 1
 extern HB_INTERNAL hb_unicode_funcs_t _hb_unicode_funcs_nil;
 #define _hb_unicode_funcs_default _hb_unicode_funcs_nil
 #endif
 
 
+HB_INTERNAL unsigned int
+_hb_unicode_modified_combining_class (hb_unicode_funcs_t *ufuncs,
+				      hb_codepoint_t      unicode);
 
+static inline hb_bool_t
+_hb_unicode_is_variation_selector (hb_codepoint_t unicode)
+{
+  return unlikely ((unicode >=  0x180B && unicode <=  0x180D) || /* MONGOLIAN FREE VARIATION SELECTOR ONE..THREE */
+		   (unicode >=  0xFE00 && unicode <=  0xFE0F) || /* VARIATION SELECTOR-1..16 */
+		   (unicode >= 0xE0100 && unicode <= 0xE01EF));  /* VARIATION SELECTOR-17..256 */
+}
+
+/* Zero-Width invisible characters:
+ *
+ *  00AD  SOFT HYPHEN
+ *  034F  COMBINING GRAPHEME JOINER
+ *
+ *  200B  ZERO WIDTH SPACE
+ *  200C  ZERO WIDTH NON-JOINER
+ *  200D  ZERO WIDTH JOINER
+ *  200E  LEFT-TO-RIGHT MARK
+ *  200F  RIGHT-TO-LEFT MARK
+ *
+ *  2028  LINE SEPARATOR
+ *
+ *  202A  LEFT-TO-RIGHT EMBEDDING
+ *  202B  RIGHT-TO-LEFT EMBEDDING
+ *  202C  POP DIRECTIONAL FORMATTING
+ *  202D  LEFT-TO-RIGHT OVERRIDE
+ *  202E  RIGHT-TO-LEFT OVERRIDE
+ *
+ *  2060  WORD JOINER
+ *  2061  FUNCTION APPLICATION
+ *  2062  INVISIBLE TIMES
+ *  2063  INVISIBLE SEPARATOR
+ *
+ *  FEFF  ZERO WIDTH NO-BREAK SPACE
+ */
+static inline hb_bool_t
+_hb_unicode_is_zero_width (hb_codepoint_t ch)
+{
+  return ((ch & ~0x007F) == 0x2000 && (
+	  (ch >= 0x200B && ch <= 0x200F) ||
+	  (ch >= 0x202A && ch <= 0x202E) ||
+	  (ch >= 0x2060 && ch <= 0x2063) ||
+	  (ch == 0x2028)
+	 )) || unlikely (ch == 0x0009
+		      || ch == 0x00AD
+		      || ch == 0x034F
+		      || ch == 0xFEFF);
+}
 
 #endif /* HB_UNICODE_PRIVATE_HH */