fix: made rune constants unsigned for implicit casting

1 files changed, 12 insertions, 10 deletions

diff --git a/include/libn.h b/include/libn.h
index f469c5c..835d2c1 100644
--- a/include/libn.h
+++ b/include/libn.h
@@ -136,22 +136,24 @@ void    str·replace(string s, const byte* from, const byte* to);
 string* str·split(string s, const byte* tok);
 string  str·join(vlong len, byte** fields, const byte* sep);
 
- /*
+/*
  * UTF-8 functions.
  * Perhaps break into own unit
  * TODO: Add to(upper|lower|title)
  */
 typedef uint32 rune;
 
-enum
-{
-    UTFmax    = 4,
-    RuneSync  = 0x80,
-    RuneSelf  = 0x80,
-    RuneErr   = 0xFFFD,
-    RuneMax   = 0x10FFFF,
-    RuneMask  = 0x1FFFFF,
-};
+/* 
+ * We have to use the preprocessor to ensure
+ * we have unsigned constants. Unfortunate...
+ */
+
+#define UTFmax   4
+#define RuneSync 0x80u
+#define RuneSelf 0x80u
+#define RuneErr  0xFFFDu
+#define RuneMax  0x10FFFFu
+#define RuneMask 0x1FFFFFu
 
 /* utf8 helpers */
 int     utf8·fullrune(byte *s, int n);