You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
124 lines
3.2 KiB
124 lines
3.2 KiB
/* |
|
* Copyright (C) 1999-2002, 2016 Free Software Foundation, Inc. |
|
* This file is part of the GNU LIBICONV Library. |
|
* |
|
* The GNU LIBICONV Library is free software; you can redistribute it |
|
* and/or modify it under the terms of the GNU Library General Public |
|
* License as published by the Free Software Foundation; either version 2 |
|
* of the License, or (at your option) any later version. |
|
* |
|
* The GNU LIBICONV Library 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 |
|
* Library General Public License for more details. |
|
* |
|
* You should have received a copy of the GNU Library General Public |
|
* License along with the GNU LIBICONV Library; see the file COPYING.LIB. |
|
* If not, see <http://www.gnu.org/licenses/>. |
|
*/ |
|
|
|
/* |
|
* C99 |
|
* This is ASCII with \uXXXX and \UXXXXXXXX escape sequences, denoting Unicode |
|
* characters. See ISO/IEC 9899:1999, section 6.4.3. |
|
* The treatment of control characters in the range U+0080..U+009F is not |
|
* specified; we pass them through unmodified. |
|
*/ |
|
|
|
static int |
|
c99_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, size_t n) |
|
{ |
|
unsigned char c; |
|
ucs4_t wc; |
|
int i; |
|
|
|
c = s[0]; |
|
if (c < 0xa0) { |
|
if (c != '\\') { |
|
*pwc = c; |
|
return 1; |
|
} |
|
if (n < 2) |
|
return RET_TOOFEW(0); |
|
c = s[1]; |
|
if (c == 'u') { |
|
wc = 0; |
|
for (i = 2; i < 6; i++) { |
|
if (n <= i) |
|
return RET_TOOFEW(0); |
|
c = s[i]; |
|
if (c >= '0' && c <= '9') |
|
c -= '0'; |
|
else if (c >= 'A' && c <= 'Z') |
|
c -= 'A'-10; |
|
else if (c >= 'a' && c <= 'z') |
|
c -= 'a'-10; |
|
else |
|
goto simply_backslash; |
|
wc |= (ucs4_t) c << (4 * (5-i)); |
|
} |
|
if ((wc >= 0x00a0 && !(wc >= 0xd800 && wc < 0xe000)) |
|
|| wc == 0x0024 || wc == 0x0040 || wc == 0x0060) { |
|
*pwc = wc; |
|
return 6; |
|
} |
|
} else if (c == 'U') { |
|
wc = 0; |
|
for (i = 2; i < 10; i++) { |
|
if (n <= i) |
|
return RET_TOOFEW(0); |
|
c = s[i]; |
|
if (c >= '0' && c <= '9') |
|
c -= '0'; |
|
else if (c >= 'A' && c <= 'Z') |
|
c -= 'A'-10; |
|
else if (c >= 'a' && c <= 'z') |
|
c -= 'a'-10; |
|
else |
|
goto simply_backslash; |
|
wc |= (ucs4_t) c << (4 * (9-i)); |
|
} |
|
if ((wc >= 0x00a0 && !(wc >= 0xd800 && wc < 0xe000)) |
|
|| wc == 0x0024 || wc == 0x0040 || wc == 0x0060) { |
|
*pwc = wc; |
|
return 10; |
|
} |
|
} else |
|
goto simply_backslash; |
|
} |
|
return RET_ILSEQ; |
|
simply_backslash: |
|
*pwc = '\\'; |
|
return 1; |
|
} |
|
|
|
static int |
|
c99_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, size_t n) |
|
{ |
|
if (wc < 0xa0) { |
|
*r = wc; |
|
return 1; |
|
} else { |
|
int result; |
|
unsigned char u; |
|
if (wc < 0x10000) { |
|
result = 6; |
|
u = 'u'; |
|
} else { |
|
result = 10; |
|
u = 'U'; |
|
} |
|
if (n >= result) { |
|
int count; |
|
r[0] = '\\'; |
|
r[1] = u; |
|
r += 2; |
|
for (count = result-3; count >= 0; count--) { |
|
unsigned int i = (wc >> (4*count)) & 0x0f; |
|
*r++ = (i < 10 ? '0'+i : 'a'-10+i); |
|
} |
|
return result; |
|
} else |
|
return RET_TOOSMALL; |
|
} |
|
}
|
|
|