1 /* Conversion UCS-4 to UTF-8.
2 Copyright (C) 2002, 2006-2007 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 Library General Public License as published
7 by the Free Software Foundation; either version 2, or (at your option)
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 Library General Public License for more details.
15 You should have received a copy of the GNU Library General Public
16 License along with this program; if not, write to the Free Software
17 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
26 u8_uctomb_aux (uint8_t *s, ucs4_t uc, int n)
31 /* The case n >= 1 is already handled by the caller. */
35 else if (uc < 0x10000)
37 if (uc < 0xd800 || uc >= 0xe000)
43 else if (uc < 0x200000)
45 else if (uc < 0x4000000)
47 else if (uc <= 0x7fffffff)
50 else if (uc < 0x110000)
59 switch (count) /* note: code falls through cases! */
62 case 6: s[5] = 0x80 | (uc & 0x3f); uc = uc >> 6; uc |= 0x4000000;
63 case 5: s[4] = 0x80 | (uc & 0x3f); uc = uc >> 6; uc |= 0x200000;
65 case 4: s[3] = 0x80 | (uc & 0x3f); uc = uc >> 6; uc |= 0x10000;
66 case 3: s[2] = 0x80 | (uc & 0x3f); uc = uc >> 6; uc |= 0x800;
67 case 2: s[1] = 0x80 | (uc & 0x3f); uc = uc >> 6; uc |= 0xc0;
68 /*case 1:*/ s[0] = uc;