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-rw-r--r--lualibs-unicode.lua11
1 files changed, 10 insertions, 1 deletions
diff --git a/lualibs-unicode.lua b/lualibs-unicode.lua
index 902f6a0..6601a4c 100644
--- a/lualibs-unicode.lua
+++ b/lualibs-unicode.lua
@@ -9,7 +9,6 @@ if not modules then modules = { } end modules ['l-unicode'] = {
-- this module will be reorganized
-- todo: utf.sub replacement (used in syst-aux)
-
-- we put these in the utf namespace:
utf = utf or (unicode and unicode.utf8) or { }
@@ -1130,3 +1129,13 @@ if not utf.values then
string.utfvalues = utf.values
end
+
+function utf.chrlen(u) -- u is number
+ return
+ (u < 0x80 and 1) or
+ (u < 0xE0 and 2) or
+ (u < 0xF0 and 3) or
+ (u < 0xF8 and 4) or
+ (u < 0xFC and 5) or
+ (u < 0xFE and 6) or 0
+end