| /* |
| * 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; |
| } |