/* * 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; }