| 1 | /* Store a character in UTF-8 string.
|
|---|
| 2 | Copyright (C) 2002, 2005-2006, 2009-2012 Free Software Foundation, Inc.
|
|---|
| 3 | Written by Bruno Haible <bruno@clisp.org>, 2002.
|
|---|
| 4 |
|
|---|
| 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.
|
|---|
| 9 |
|
|---|
| 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.
|
|---|
| 14 |
|
|---|
| 15 | You should have received a copy of the GNU General Public License
|
|---|
| 16 | along with this program. If not, see <http://www.gnu.org/licenses/>. */
|
|---|
| 17 |
|
|---|
| 18 | #include <config.h>
|
|---|
| 19 |
|
|---|
| 20 | #if defined IN_LIBUNISTRING
|
|---|
| 21 | /* Tell unistr.h to declare u8_uctomb as 'extern', not 'static inline'. */
|
|---|
| 22 | # include "unistring-notinline.h"
|
|---|
| 23 | #endif
|
|---|
| 24 |
|
|---|
| 25 | /* Specification. */
|
|---|
| 26 | #include "unistr.h"
|
|---|
| 27 |
|
|---|
| 28 | #if !HAVE_INLINE
|
|---|
| 29 |
|
|---|
| 30 | int
|
|---|
| 31 | u8_uctomb (uint8_t *s, ucs4_t uc, int n)
|
|---|
| 32 | {
|
|---|
| 33 | if (uc < 0x80)
|
|---|
| 34 | {
|
|---|
| 35 | if (n > 0)
|
|---|
| 36 | {
|
|---|
| 37 | s[0] = uc;
|
|---|
| 38 | return 1;
|
|---|
| 39 | }
|
|---|
| 40 | /* else return -2, below. */
|
|---|
| 41 | }
|
|---|
| 42 | else
|
|---|
| 43 | {
|
|---|
| 44 | int count;
|
|---|
| 45 |
|
|---|
| 46 | if (uc < 0x800)
|
|---|
| 47 | count = 2;
|
|---|
| 48 | else if (uc < 0x10000)
|
|---|
| 49 | {
|
|---|
| 50 | if (uc < 0xd800 || uc >= 0xe000)
|
|---|
| 51 | count = 3;
|
|---|
| 52 | else
|
|---|
| 53 | return -1;
|
|---|
| 54 | }
|
|---|
| 55 | #if 0
|
|---|
| 56 | else if (uc < 0x200000)
|
|---|
| 57 | count = 4;
|
|---|
| 58 | else if (uc < 0x4000000)
|
|---|
| 59 | count = 5;
|
|---|
| 60 | else if (uc <= 0x7fffffff)
|
|---|
| 61 | count = 6;
|
|---|
| 62 | #else
|
|---|
| 63 | else if (uc < 0x110000)
|
|---|
| 64 | count = 4;
|
|---|
| 65 | #endif
|
|---|
| 66 | else
|
|---|
| 67 | return -1;
|
|---|
| 68 |
|
|---|
| 69 | if (n >= count)
|
|---|
| 70 | {
|
|---|
| 71 | switch (count) /* note: code falls through cases! */
|
|---|
| 72 | {
|
|---|
| 73 | #if 0
|
|---|
| 74 | case 6: s[5] = 0x80 | (uc & 0x3f); uc = uc >> 6; uc |= 0x4000000;
|
|---|
| 75 | case 5: s[4] = 0x80 | (uc & 0x3f); uc = uc >> 6; uc |= 0x200000;
|
|---|
| 76 | #endif
|
|---|
| 77 | case 4: s[3] = 0x80 | (uc & 0x3f); uc = uc >> 6; uc |= 0x10000;
|
|---|
| 78 | case 3: s[2] = 0x80 | (uc & 0x3f); uc = uc >> 6; uc |= 0x800;
|
|---|
| 79 | case 2: s[1] = 0x80 | (uc & 0x3f); uc = uc >> 6; uc |= 0xc0;
|
|---|
| 80 | /*case 1:*/ s[0] = uc;
|
|---|
| 81 | }
|
|---|
| 82 | return count;
|
|---|
| 83 | }
|
|---|
| 84 | }
|
|---|
| 85 | return -2;
|
|---|
| 86 | }
|
|---|
| 87 |
|
|---|
| 88 | #endif
|
|---|