From 4abab5ad6c8465a7528ccdd5f49367da05f78bbd Mon Sep 17 00:00:00 2001 From: Vladimir Azarov Date: Tue, 1 Oct 2024 15:47:05 +0200 Subject: Initial version --- src/ctype/wcwidth.c | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) create mode 100644 src/ctype/wcwidth.c (limited to 'src/ctype/wcwidth.c') diff --git a/src/ctype/wcwidth.c b/src/ctype/wcwidth.c new file mode 100644 index 0000000..36256a5 --- /dev/null +++ b/src/ctype/wcwidth.c @@ -0,0 +1,29 @@ +#include + +static const unsigned char table[] = { +#include "nonspacing.h" +}; + +static const unsigned char 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 v1.2.3