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/*
* Copyright (C) 1999-2002 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, write to the Free Software Foundation, Inc., 59 Temple Place -
* Suite 330, Boston, MA 02111-1307, USA.
*/
/*
* JAVA
* This is ISO 8859-1 with \uXXXX escape sequences, denoting Unicode BMP
* characters. Consecutive pairs of \uXXXX escape sequences in the surrogate
* range, as in UTF-16, denote Unicode characters outside the BMP.
*/
static int
java_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, int n)
{
unsigned char c;
ucs4_t wc, wc2;
int i;
c = s[0];
if (c != '\\') {
*pwc = c;
return 1;
}
if (n < 2)
return RET_TOOFEW(0);
if (s[1] != 'u')
goto simply_backslash;
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 >= 0xd800 && wc < 0xe000)) {
*pwc = wc;
return 6;
}
if (wc >= 0xdc00)
goto simply_backslash;
if (n < 7)
return RET_TOOFEW(0);
if (s[6] != '\\')
goto simply_backslash;
if (n < 8)
return RET_TOOFEW(0);
if (s[7] != 'u')
goto simply_backslash;
wc2 = 0;
for (i = 8; i < 12; 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;
wc2 |= (ucs4_t) c << (4 * (11-i));
}
if (!(wc2 >= 0xdc00 && wc2 < 0xe000))
goto simply_backslash;
*pwc = 0x10000 + ((wc - 0xd800) << 10) + (wc2 - 0xdc00);
return 12;
simply_backslash:
*pwc = '\\';
return 1;
}
static int
java_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, int n)
{
if (wc < 0x80) {
*r = wc;
return 1;
} else if (wc < 0x10000) {
if (n >= 6) {
unsigned int i;
r[0] = '\\';
r[1] = 'u';
i = (wc >> 12) & 0x0f; r[2] = (i < 10 ? '0'+i : 'a'-10+i);
i = (wc >> 8) & 0x0f; r[3] = (i < 10 ? '0'+i : 'a'-10+i);
i = (wc >> 4) & 0x0f; r[4] = (i < 10 ? '0'+i : 'a'-10+i);
i = wc & 0x0f; r[5] = (i < 10 ? '0'+i : 'a'-10+i);
return 6;
} else
return RET_TOOSMALL;
} else if (wc < 0x110000) {
if (n >= 12) {
ucs4_t wc1 = 0xd800 + ((wc - 0x10000) >> 10);
ucs4_t wc2 = 0xdc00 + ((wc - 0x10000) & 0x3ff);
unsigned int i;
r[0] = '\\';
r[1] = 'u';
i = (wc1 >> 12) & 0x0f; r[2] = (i < 10 ? '0'+i : 'a'-10+i);
i = (wc1 >> 8) & 0x0f; r[3] = (i < 10 ? '0'+i : 'a'-10+i);
i = (wc1 >> 4) & 0x0f; r[4] = (i < 10 ? '0'+i : 'a'-10+i);
i = wc1 & 0x0f; r[5] = (i < 10 ? '0'+i : 'a'-10+i);
r[6] = '\\';
r[7] = 'u';
i = (wc2 >> 12) & 0x0f; r[8] = (i < 10 ? '0'+i : 'a'-10+i);
i = (wc2 >> 8) & 0x0f; r[9] = (i < 10 ? '0'+i : 'a'-10+i);
i = (wc2 >> 4) & 0x0f; r[10] = (i < 10 ? '0'+i : 'a'-10+i);
i = wc2 & 0x0f; r[11] = (i < 10 ? '0'+i : 'a'-10+i);
return 12;
} else
return RET_TOOSMALL;
}
return RET_ILUNI;
}
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