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/internal.h | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) create mode 100644 sys/libunicode/internal.h (limited to 'sys/libunicode/internal.h') diff --git a/sys/libunicode/internal.h b/sys/libunicode/internal.h new file mode 100644 index 0000000..bf376b2 --- /dev/null +++ b/sys/libunicode/internal.h @@ -0,0 +1,25 @@ +#pragma once + +#include +#include +#include + +#define Bit(i) (7-(i)) +/* N 0's preceded by i 1's e.g. T(Bit(2)) is 1100 0000 */ +#define Tbyte(i) (((1 << (Bit(i)+1))-1) ^ 0xFF) +/* 0000 0000 0000 0111 1111 1111 */ +#define RuneX(i) ((1 << (Bit(i) + ((i)-1)*Bitx))-1) + +enum +{ + Bitx = Bit(1), + Tx = Tbyte(1), + Rune1 = (1 << (Bit(0)+0*Bitx)) - 1, + + Maskx = (1 << Bitx) - 1, /* 0011 1111 */ + Testx = Maskx ^ 0xff, /* 1100 0000 */ + + SurrogateMin = 0xD800, + SurrogateMax = 0xDFFF, + Bad = RuneErr, +}; -- cgit v1.2.1