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/*
* Copyright (C) 1999-2001 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.
*/
/*
* GB18030
*/
/*
* GB18030, as implemented in glibc-2.2, is an extension of GBK (= CP936).
* It adds the following ranges:
* 1. Two-byte range
* 0xA2E3, 0xA8BF, 0xA98A..0xA995, 0xFE50..0xFE9F
* 2. Four-byte range
* 0x{81..84}{30..39}{81..FE}{30..39}
* Most of Unicode plane 1 in Unicode order.
* Start: 0x81308130 = 0x0080
* End: 0x8431A439 = 0xFFFF
* 3. Four-byte range
* 0x{90..E3}{30..39}{81..FE}{30..39}
* Unicode plane 2..16 in Unicode order.
* Start: 0x90308130 = 0x010000
* End: 0xE3329A35 = 0x10FFFF
*/
#include "gb18030ext.h"
#include "gb18030uni.h"
static int
gb18030_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, int 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 = gb18030ext_mbtowc(conv,pwc,s,n);
if (ret != RET_ILSEQ)
return ret;
/* Code set 2 (remainder of Unicode U+0000..U+FFFF) */
ret = gb18030uni_mbtowc(conv,pwc,s,n);
if (ret != RET_ILSEQ)
return ret;
/* 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 int
gb18030_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, int 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 = gb18030ext_wctomb(conv,r,wc,n);
if (ret != RET_ILUNI)
return ret;
/* Code set 2 (remainder of Unicode U+0000..U+FFFF) */
ret = gb18030uni_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;
}
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