125 lines
3.2 KiB
C
125 lines
3.2 KiB
C
|
/*
|
||
|
|
* 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 Lesser General Public
|
||
|
|
* License as published by the Free Software Foundation; either version 2.1
|
||
|
|
* 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
|
||
|
|
* Lesser General Public License for more details.
|
||
|
|
*
|
||
|
|
* You should have received a copy of the GNU Lesser General Public
|
||
|
|
* License along with the GNU LIBICONV Library; see the file COPYING.LIB.
|
||
|
|
* If not, see <https://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;
|
||
|
|
}
|
||
|
|
}
|