Exposed some unicode values to library users.

I was hiding too many important constants. This commit moves them to the
main exported header.

1 files changed, 8 insertions, 2 deletions

diff --git a/include/libunicode.h b/include/libunicode.h
index 00e5bc0..773f9ab 100644
--- a/include/libunicode.h
+++ b/include/libunicode.h
@@ -4,12 +4,18 @@ typedef uint32 rune;
 
 #define UTFmax   4
 #define RuneErr  0xFFFDu
+#define RuneMax  0x10FFFFu
+
+#define utf8·onebyte(c)       (((c)&0x80u)==0x00u)
+#define utf8·twobyte(c)       (((c)&0xE0u)==0xC0u)
+#define utf8·threebyte(c)     (((c)&0xF0u)==0xE0u)
+#define utf8·fourbyte(c)      (((c)&0xF8u)==0xF0u)
 
 /*
  * UTF-8 functions.
  */
-int     utf8·len(char *s);            // returns number of runes
-int     utf8·runelen(rune r);         // returns number of bytes for rune
+int     utf8·len(char *s);       // returns number of runes for s
+int     utf8·runelen(rune r);    // returns number of bytes for rune
 
 int     utf8·decode(char *, rune *);       // decode 1 rune from char stream, store into rune, return number of bytes
 int     utf8·encode(rune *, char *);       // encode 1 rune from rune stream, store into char, return number of bytes