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/*
* Copyright (C) 1999-2001, 2005, 2012, 2016, 2023 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/>.
*/
/*
* GB18030:2022
*/
/*
* GB18030, in the version from 2022, is like the version from 2005,
* except that a few mappings to the Unicode PUA have been replaced with
* mappings to assigned Unicode characters.
*/
static int
gb18030_2022_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, size_t n)
{
int ret;
/* Code set 0 (ASCII) */
if (*s < 0x80)
return ascii_mbtowc(conv,pwc,s,n);
/* Code set 1 (GBK extended) */
ret = gbk_mbtowc(conv,pwc,s,n);
if (ret != RET_ILSEQ)
return ret;
ret = gb18030_2022_ext_mbtowc(conv,pwc,s,n);
if (ret != RET_ILSEQ)
return ret;
/* Code set 2 (remainder of Unicode U+0000..U+FFFF), including
User-defined characters, two-byte part of range U+E766..U+E864 */
ret = gb18030_2022_uni_mbtowc(conv,pwc,s,n);
if (ret != RET_ILSEQ)
return ret;
/* User-defined characters range U+E000..U+E765 */
{
unsigned char c1 = s[0];
if ((c1 >= 0xaa && c1 <= 0xaf) || (c1 >= 0xf8 && c1 <= 0xfe)) {
if (n >= 2) {
unsigned char c2 = s[1];
if (c2 >= 0xa1 && c2 <= 0xfe) {
*pwc = 0xe000 + 94 * (c1 >= 0xf8 ? c1 - 0xf2 : c1 - 0xaa) + (c2 - 0xa1);
return 2;
}
} else
return RET_TOOFEW(0);
} else if (c1 >= 0xa1 && c1 <= 0xa7) {
if (n >= 2) {
unsigned char c2 = s[1];
if (c2 >= 0x40 && c2 <= 0xa1 && c2 != 0x7f) {
*pwc = 0xe4c6 + 96 * (c1 - 0xa1) + c2 - (c2 >= 0x80 ? 0x41 : 0x40);
return 2;
}
} else
return RET_TOOFEW(0);
}
}
/* Code set 3 (Unicode U+10000..U+10FFFF) */
{
unsigned char c1 = s[0];
if (c1 >= 0x90 && c1 <= 0xe3) {
if (n >= 2) {
unsigned char c2 = s[1];
if (c2 >= 0x30 && c2 <= 0x39) {
if (n >= 3) {
unsigned char c3 = s[2];
if (c3 >= 0x81 && c3 <= 0xfe) {
if (n >= 4) {
unsigned char c4 = s[3];
if (c4 >= 0x30 && c4 <= 0x39) {
unsigned int i = (((c1 - 0x90) * 10 + (c2 - 0x30)) * 126 + (c3 - 0x81)) * 10 + (c4 - 0x30);
if (i >= 0 && i < 0x100000) {
*pwc = (ucs4_t) (0x10000 + i);
return 4;
}
}
return RET_ILSEQ;
}
return RET_TOOFEW(0);
}
return RET_ILSEQ;
}
return RET_TOOFEW(0);
}
return RET_ILSEQ;
}
return RET_TOOFEW(0);
}
return RET_ILSEQ;
}
}
static const unsigned short gb18030_2022_pua2charset[23*3] = {
/* Unicode range GB18030 range */
0xe766, 0xe76b, 0xa2ab, /*.. 0xa2b0, */
0xe76d, 0xe76d, 0xa2e4,
0xe76e, 0xe76f, 0xa2ef, /*.. 0xa2f0, */
0xe770, 0xe771, 0xa2fd, /*.. 0xa2fe, */
0xe772, 0xe77c, 0xa4f4, /*.. 0xa4fe, */
0xe77d, 0xe784, 0xa5f7, /*.. 0xa5fe, */
0xe785, 0xe78c, 0xa6b9, /*.. 0xa6c0, */
0xe797, 0xe79f, 0xa6f6, /*.. 0xa6fe, */
0xe7a0, 0xe7ae, 0xa7c2, /*.. 0xa7d0, */
0xe7af, 0xe7bb, 0xa7f2, /*.. 0xa7fe, */
0xe7bc, 0xe7c6, 0xa896, /*.. 0xa8a0, */
0xe7c9, 0xe7cc, 0xa8c1, /*.. 0xa8c4, */
0xe7cd, 0xe7e1, 0xa8ea, /*.. 0xa8fe, */
0xe7e2, 0xe7e2, 0xa958,
0xe7e3, 0xe7e3, 0xa95b,
0xe7e4, 0xe7e6, 0xa95d, /*.. 0xa95f, */
0xe7f4, 0xe800, 0xa997, /*.. 0xa9a3, */
0xe801, 0xe80f, 0xa9f0, /*.. 0xa9fe, */
0xe810, 0xe814, 0xd7fa, /*.. 0xd7fe, */
0xe816, 0xe818, 0xfe51, /*.. 0xfe53, */
0xe831, 0xe831, 0xfe6c,
0xe83b, 0xe83b, 0xfe76,
0xe855, 0xe855, 0xfe91,
};
static int
gb18030_2022_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, size_t n)
{
int ret;
/* Code set 0 (ASCII) */
ret = ascii_wctomb(conv,r,wc,n);
if (ret != RET_ILUNI)
return ret;
/* Code set 1 (GBK extended) */
ret = gbk_wctomb(conv,r,wc,n);
if (ret != RET_ILUNI)
return ret;
ret = gb18030_2022_ext_wctomb(conv,r,wc,n);
if (ret != RET_ILUNI)
return ret;
/* Code set 2 (remainder of Unicode U+0000..U+FFFF) */
if (wc >= 0xe000 && wc <= 0xe864) {
if (n >= 2) {
if (wc < 0xe766) {
/* User-defined characters range U+E000..U+E765 */
if (wc < 0xe4c6) {
unsigned int i = wc - 0xe000;
r[1] = (i % 94) + 0xa1; i = i / 94;
r[0] = (i < 6 ? i + 0xaa : i + 0xf2);
return 2;
} else {
unsigned int i = wc - 0xe4c6;
r[0] = (i / 96) + 0xa1; i = i % 96;
r[1] = i + (i >= 0x3f ? 0x41 : 0x40);
return 2;
}
} else {
/* User-defined characters, two-byte part of range U+E766..U+E864 */
unsigned int k1 = 0;
unsigned int k2 = 23;
/* Invariant: We know that if wc occurs in Unicode interval in
gb18030_2022_pua2charset, it does so at a k with k1 <= k < k2. */
while (k1 < k2) {
unsigned int k = (k1 + k2) / 2;
if (wc < gb18030_2022_pua2charset[k*3+0])
k2 = k;
else if (wc > gb18030_2022_pua2charset[k*3+1])
k1 = k + 1;
else {
unsigned short c =
gb18030_2022_pua2charset[k*3+2] + (wc - gb18030_2022_pua2charset[k*3+0]);
r[0] = (c >> 8);
r[1] = (c & 0xff);
return 2;
}
}
}
} else
return RET_TOOSMALL;
}
ret = gb18030_2022_uni_wctomb(conv,r,wc,n);
if (ret != RET_ILUNI)
return ret;
/* Code set 3 (Unicode U+10000..U+10FFFF) */
if (n >= 4) {
if (wc >= 0x10000 && wc < 0x110000) {
unsigned int i = wc - 0x10000;
r[3] = (i % 10) + 0x30; i = i / 10;
r[2] = (i % 126) + 0x81; i = i / 126;
r[1] = (i % 10) + 0x30; i = i / 10;
r[0] = i + 0x90;
return 4;
}
return RET_ILUNI;
}
return RET_TOOSMALL;
}