From 4f93f935dc7a981ca073a322425c3f5929ffb644 Mon Sep 17 00:00:00 2001 From: Thomas Voss Date: Sun, 21 Jan 2024 03:03:58 +0100 Subject: Support line- & column-based match locations --- vendor/librune/lib/utf8/rtou8.c | 36 ++++++++++++++++++++++++++++++++++++ 1 file changed, 36 insertions(+) create mode 100644 vendor/librune/lib/utf8/rtou8.c (limited to 'vendor/librune/lib/utf8/rtou8.c') diff --git a/vendor/librune/lib/utf8/rtou8.c b/vendor/librune/lib/utf8/rtou8.c new file mode 100644 index 0000000..1823f08 --- /dev/null +++ b/vendor/librune/lib/utf8/rtou8.c @@ -0,0 +1,36 @@ +#include "utf8.h" + +#include "internal/common.h" + +int +rtou8(char8_t *s, rune ch, size_t n) +{ + if (ch <= _1B_MAX) { + if (n >= 1) + s[0] = ch; + return 1; + } else if (ch <= _2B_MAX) { + if (n >= 2) { + s[0] = (ch >> 6) | 0xC0; + s[1] = (ch & 0x3F) | 0x80; + } + return 2; + } else if (ch <= _3B_MAX) { + if (n >= 3) { + s[0] = (ch >> 12) | 0xE0; + s[1] = ((ch >> 6) & 0x3F) | 0x80; + s[2] = (ch & 0x3F) | 0x80; + } + return 3; + } else if (ch <= _4B_MAX) { + if (n >= 4) { + s[0] = (ch >> 18) | 0xF0; + s[1] = ((ch >> 12) & 0x3F) | 0x80; + s[2] = ((ch >> 6) & 0x3F) | 0x80; + s[3] = (ch & 0x3F) | 0x80; + } + return 4; + } + + unreachable(); +} -- cgit v1.2.3