| /* Store a character in UTF-8 string. |
| Copyright (C) 2002, 2005-2006, 2009-2019 Free Software Foundation, Inc. |
| Written by Bruno Haible <bruno@clisp.org>, 2002. |
| |
| This program is free software: you can redistribute it and/or modify it |
| under the terms of the GNU General Public License as published |
| by the Free Software Foundation; either version 3 of the License, or |
| (at your option) any later version. |
| |
| This program 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 |
| General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program. If not, see <https://www.gnu.org/licenses/>. */ |
| |
| #include <config.h> |
| |
| #if defined IN_LIBUNISTRING |
| /* Tell unistr.h to declare u8_uctomb as 'extern', not 'static inline'. */ |
| # include "unistring-notinline.h" |
| #endif |
| |
| /* Specification. */ |
| #include "unistr.h" |
| |
| #if !HAVE_INLINE |
| |
| int |
| u8_uctomb (uint8_t *s, ucs4_t uc, int n) |
| { |
| if (uc < 0x80) |
| { |
| if (n > 0) |
| { |
| s[0] = uc; |
| return 1; |
| } |
| /* else return -2, below. */ |
| } |
| else |
| { |
| int count; |
| |
| 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) |
| { |
| switch (count) /* note: code falls through cases! */ |
| { |
| case 4: s[3] = 0x80 | (uc & 0x3f); uc = uc >> 6; uc |= 0x10000; |
| case 3: s[2] = 0x80 | (uc & 0x3f); uc = uc >> 6; uc |= 0x800; |
| case 2: s[1] = 0x80 | (uc & 0x3f); uc = uc >> 6; uc |= 0xc0; |
| /*case 1:*/ s[0] = uc; |
| } |
| return count; |
| } |
| } |
| return -2; |
| } |
| |
| #endif |