From 252601302d45036817546c533743e5918b6b86e8 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 5 May 2024 19:38:31 +0200 Subject: Adding upstream version 1.21.3. Signed-off-by: Daniel Baumann --- lib/unistr/u8-uctomb-aux.c | 60 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 60 insertions(+) create mode 100644 lib/unistr/u8-uctomb-aux.c (limited to 'lib/unistr/u8-uctomb-aux.c') diff --git a/lib/unistr/u8-uctomb-aux.c b/lib/unistr/u8-uctomb-aux.c new file mode 100644 index 0000000..5ca2191 --- /dev/null +++ b/lib/unistr/u8-uctomb-aux.c @@ -0,0 +1,60 @@ +/* Conversion UCS-4 to UTF-8. + Copyright (C) 2002, 2006-2007, 2009-2022 Free Software Foundation, Inc. + Written by Bruno Haible , 2002. + + This file is free software: you can redistribute it and/or modify + it under the terms of the GNU Lesser General Public License as + published by the Free Software Foundation; either version 2.1 of the + License, or (at your option) any later version. + + This file is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with this program. If not, see . */ + +#include + +/* Specification. */ +#include "unistr.h" + +#include "attribute.h" + +int +u8_uctomb_aux (uint8_t *s, ucs4_t uc, ptrdiff_t n) +{ + int count; + + if (uc < 0x80) + /* The case n >= 1 is already handled by the caller. */ + return -2; + else if (uc < 0x800) + count = 2; + else if (uc < 0x10000) + { + if (uc < 0xd800 || uc >= 0xe000) + count = 3; + else + return -1; + } + else if (uc < 0x110000) + count = 4; + else + return -1; + + if (n < count) + return -2; + + switch (count) /* note: code falls through cases! */ + { + case 4: s[3] = 0x80 | (uc & 0x3f); uc = uc >> 6; uc |= 0x10000; + FALLTHROUGH; + case 3: s[2] = 0x80 | (uc & 0x3f); uc = uc >> 6; uc |= 0x800; + FALLTHROUGH; + case 2: s[1] = 0x80 | (uc & 0x3f); uc = uc >> 6; uc |= 0xc0; + /*case 1:*/ s[0] = uc; + } + return count; +} -- cgit v1.2.3