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Diffstat (limited to 'MSVC/iconv/gb18030.h')
| -rw-r--r-- | MSVC/iconv/gb18030.h | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/MSVC/iconv/gb18030.h b/MSVC/iconv/gb18030.h new file mode 100644 index 0000000..96f52c0 --- /dev/null +++ b/MSVC/iconv/gb18030.h @@ -0,0 +1,140 @@ +/* + * 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; +} |