From 7b5b105d84103d4320de510f0fdab345b5d2f477 Mon Sep 17 00:00:00 2001 From: Nicholas Noll Date: Sat, 6 Jun 2020 12:31:12 -0700 Subject: added fork of st --- sys/cmd/term/util.c | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+) create mode 100644 sys/cmd/term/util.c (limited to 'sys/cmd/term/util.c') diff --git a/sys/cmd/term/util.c b/sys/cmd/term/util.c new file mode 100644 index 0000000..3e7d81b --- /dev/null +++ b/sys/cmd/term/util.c @@ -0,0 +1,30 @@ +#include + +static const uchar table[] = { +#include "nonspacing.h" +}; + +static const uchar wtable[] = { +#include "wide.h" +}; + +int +wcwidth(wchar_t wc) +{ + if (wc < 0xffU) + return (wc+1 & 0x7f) >= 0x21 ? 1 : wc ? -1 : 0; + if ((wc & 0xfffeffffU) < 0xfffe) { + if ((table[table[wc>>8]*32+((wc&255)>>3)]>>(wc&7))&1) + return 0; + if ((wtable[wtable[wc>>8]*32+((wc&255)>>3)]>>(wc&7))&1) + return 2; + return 1; + } + if ((wc & 0xfffe) == 0xfffe) + return -1; + if (wc-0x20000U < 0x20000) + return 2; + if (wc == 0xe0001 || wc-0xe0020U < 0x5f || wc-0xe0100U < 0xef) + return 0; + return 1; +} -- cgit v1.2.1