Feat(libunicode): cleaned up decode/encode

Additionally, decode can now apply backwards on a byte string.

1 files changed, 4 insertions, 10 deletions

diff --git a/include/libunicode.h b/include/libunicode.h
index 5e69fd1..00e5bc0 100644
--- a/include/libunicode.h
+++ b/include/libunicode.h
@@ -2,16 +2,8 @@
 
 typedef uint32 rune;
 
-/*
- * we have to use the preprocessor to ensure we have unsigned constants.
- */
-
 #define UTFmax   4
-#define RuneSync 0x80u
-#define RuneSelf 0x80u
 #define RuneErr  0xFFFDu
-#define RuneMax  0x10FFFFu
-#define RuneMask 0x1FFFFFu
 
 /*
  * UTF-8 functions.
@@ -19,8 +11,9 @@ typedef uint32 rune;
 int     utf8·len(char *s);            // returns number of runes
 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
+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
+int     utf8·decodeprev(char *s, rune *r); // decode 1 rune from char stream, reading backwards, store into rune, return number of bytes
 
 char   *utf8·find(char *s, rune);     // find rune in char stream
 char   *utf8·findlast(char* s, rune); // find last rune in char stream
@@ -31,6 +24,7 @@ int     utf8·isletter(rune r);
 int     utf8·isdigit(rune r);
 int     utf8·isspace(rune r);
 int     utf8·istitle(rune r);
+int     utf8·ispunct(rune r);
 
 rune    utf8·toupper(rune r);
 rune    utf8·tolower(rune r);