From 29b56ef4e4113bcd091b19d6926f18814162ca53 Mon Sep 17 00:00:00 2001 From: Nicholas Noll Date: Tue, 26 Oct 2021 21:01:41 -0700 Subject: Feat(libunicode): Added an explicit unicode library Refactored code to pull out utf8 functions from base into a standalone library. Also left the required function inside arg.c so that code that calls ARG_BEGIN doesn't have to link to libunicode. --- sys/libunicode/fullrune.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) create mode 100644 sys/libunicode/fullrune.c (limited to 'sys/libunicode/fullrune.c') diff --git a/sys/libunicode/fullrune.c b/sys/libunicode/fullrune.c new file mode 100644 index 0000000..e5cf314 --- /dev/null +++ b/sys/libunicode/fullrune.c @@ -0,0 +1,18 @@ +#include "internal.h" + +int +utf8·fullrune(byte* s, int n) +{ + int i; + rune c; + + if (n <= 0) return 0; + c = *(ubyte*) s; + if (c < Tx) return 1; + + for (i = 3; i < UTFmax + 1; i++) { + if (c < Tbyte(i)) return n >= i - 1; + } + + return n >= UTFmax; +} -- cgit v1.2.1