util: when unescaping C escape sequences support C++11 \u and \U unicode literals

[elogind.git] / src / shared / utf8.h

diff --git a/src/shared/utf8.h b/src/shared/utf8.h
index 3d5a4c3a9c0c2e81db9bcd973cddf4d07591f3bf..e745649f06f5b06fcbe7b0869a798f068820d403 100644 (file)
--- a/src/shared/utf8.h
+++ b/src/shared/utf8.h
@@ -27,6 +27,8 @@
 
 #define UTF8_REPLACEMENT_CHARACTER "\xef\xbf\xbd"
 
+bool unichar_is_valid(uint32_t c);
+
 const char *utf8_is_valid(const char *s) _pure_;
 char *ascii_is_valid(const char *s) _pure_;
 
@@ -41,3 +43,15 @@ char *utf16_to_utf8(const void *s, size_t length);
 
 int utf8_encoded_valid_unichar(const char *str);
 int utf8_encoded_to_unichar(const char *str);
+
+static inline bool utf16_is_surrogate(uint16_t c) {
+        return (0xd800 <= c && c <= 0xdfff);
+}
+
+static inline bool utf16_is_trailing_surrogate(uint16_t c) {
+        return (0xdc00 <= c && c <= 0xdfff);
+}
+
+static inline uint32_t utf16_surrogate_pair_to_unichar(uint16_t lead, uint16_t trail) {
+                return ((lead - 0xd800) << 10) + (trail - 0xdc00) + 0x10000;
+}