1 /* Conversion UCS-4 to UTF-8.
2 Copyright (C) 2002, 2006-2007, 2009-2018 Free Software Foundation, Inc.
3 Written by Bruno Haible <bruno@clisp.org>, 2002.
5 This program is free software: you can redistribute it and/or modify it
6 under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 3 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program. If not, see <https://www.gnu.org/licenses/>. */
25 # define FALLTHROUGH ((void) 0)
27 # define FALLTHROUGH __attribute__ ((__fallthrough__))
32 u8_uctomb_aux (uint8_t *s, ucs4_t uc, int n)
37 /* The case n >= 1 is already handled by the caller. */
41 else if (uc < 0x10000)
43 if (uc < 0xd800 || uc >= 0xe000)
48 else if (uc < 0x110000)
56 switch (count) /* note: code falls through cases! */
58 case 4: s[3] = 0x80 | (uc & 0x3f); uc = uc >> 6; uc |= 0x10000;
60 case 3: s[2] = 0x80 | (uc & 0x3f); uc = uc >> 6; uc |= 0x800;
62 case 2: s[1] = 0x80 | (uc & 0x3f); uc = uc >> 6; uc |= 0xc0;
63 /*case 1:*/ s[0] = uc;