diff options
Diffstat (limited to 'MSVC/iconv/isoir165.h')
| -rw-r--r-- | MSVC/iconv/isoir165.h | 153 |
1 files changed, 153 insertions, 0 deletions
diff --git a/MSVC/iconv/isoir165.h b/MSVC/iconv/isoir165.h new file mode 100644 index 0000000..02e9a1f --- /dev/null +++ b/MSVC/iconv/isoir165.h @@ -0,0 +1,153 @@ +/* + * 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. + */ + +/* + * ISO-IR-165 + */ + +/* + * ISO-IR-165 is an extension of GB 2312, consisting of: + * 1. GB 6345.1-86 corrections: + * Two corrections to GB 2312, at 0x2367 and 0x6F71. + * 2. GB 6345.1-86 additions: + * - 6 new full-width pinyin characters in row 0x28. + * - ISO646-CN in row 0x2A. + * - 32 half-width pinyin characters in row 0x2B. + * 3. GB 8565.2-88 additions: + * - 50 characters in row 0x2D. + * - 92 characters in row 0x2E. + * - 93 characters in row 0x2F. + * - 470 characters in rows 0x7A-0x7E. + * 4. ISO-IR-165 additions: + * - 22 characters in row 0x26. + * - 94 characters in row 0x2C. + * - 44 new characters in row 0x2D. + * - 1 new character in row 0x2F. + * + * The conversion table was created from the following sources: + * Ad 1. The 0x2367 correction is already integrated in the unicode.org + * GB2312.TXT table. The 0x6F71 mapping is the same in the unicode.org + * GB2312.TXT and UNIHAN.TXT table and in Koichi Yasuoka's Uni2GB table, + * so we assume it's correct. + * The unicode.org UNIHAN.TXT table about GB 8565 is not usable: it has + * extraneous code points at rows 0x28, 0x2C, 0x2D. Note also that it does + * not list the 69 non-hanzi in row 0x2F. Moreover, it has the characters + * 0x2F7A-0x2F7D shifted down by one to 0x2F79-0x2F7C. + * Therefore we take the GB8565 and ISO-IR-165 data from Koichi Yasuoka's + * Uni2GB table. + * Ad 1. Yasuoka maps 0x2367 to U+0261 (small script g) and 0x2840 to U+FF47 + * (full-width small normal g). While coherent with ISO-IR's 165.pdf, + * this disagrees with Ken Lunde's book: He says that ISO-IR-165 + * includes the GB6345 correction, i.e. maps 0x2367 to U+FF47 or U+0067 + * and _not_ to U+0261 (small script g). + * To overcome the confusion, we just map both 0x2367 and 0x2840 to + * U+FF47. + * Ad 2. Row 0x28: Add a mapping from 0x283F to U+01F9. + * Row 0x2A: Mapping is well-known, also present in Koichi Yasuoka's + * table. + * Row 0x2B: Typed in by hand from appendix E in Ken Lunde's book. + * When converting from Unicode to ISO-IR-165, prefer the half-width + * range 0x2B{21..40} to the full-width range 0x28{21..40}. + * Ad 3. Rows 0x2D, 0x2E: Both Koichi Yasuoka's Uni2GB table and the UNIHAN.TXT + * data for GB 8565 agree here. + * Row 0x2F: Taken from Koichi Yasuoka's Uni2GB table. + * Rows 0x7A-0x7E: Koichi Yasuoka's Uni2GB table and the UNIHAN.TXT + * data for GB 8565 agree here mostly. Differences: + * 0x7C38 -> U+6F26 or U+527A ? We choose U+6F26. + * 0x7C5A -> U+7A40 or U+6996 ? We choose U+6996. + * Ad 4. Row 0x26: Mapping unknown. + * Rows 0x2C, 0x2D: Both Koichi Yasuoka's Uni2GB table and the UNIHAN.TXT + * data for GB 8565 (!) agree here. + * Row 0x2F: Taken from Koichi Yasuoka's Uni2GB table. + */ + +#include "isoir165ext.h" + +static int +isoir165_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, int n) +{ + int ret; + + /* Map full-width pinyin (row 0x28) like half-width pinyin (row 0x2B). */ + if (s[0] == 0x28) { + if (n >= 2) { + unsigned char c2 = s[1]; + if (c2 >= 0x21 && c2 <= 0x40) { + unsigned char buf[2]; + buf[0] = 0x2b; + buf[1] = c2; + ret = isoir165ext_mbtowc(conv,pwc,buf,2); + if (ret != RET_ILSEQ) + return ret; + } + } + } + /* Try the GB2312 -> Unicode table. */ + ret = gb2312_mbtowc(conv,pwc,s,n); + if (ret != RET_ILSEQ) + return ret; + /* Row 0x2A is GB_1988-80. */ + if (s[0] == 0x2a) { + if (n >= 2) { + unsigned char c2 = s[1]; + if (c2 >= 0x21 && c2 < 0x7f) { + int ret = iso646_cn_mbtowc(conv,pwc,s+1,1); + if (ret != 1) abort(); + return 2; + } + return RET_ILSEQ; + } + return RET_TOOFEW(0); + } + /* Try the ISO-IR-165 extensions -> Unicode table. */ + ret = isoir165ext_mbtowc(conv,pwc,s,n); + return ret; +} + +static int +isoir165_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, int n) +{ + unsigned char buf[1]; + int ret; + + /* Try the Unicode -> GB2312 table table. */ + ret = gb2312_wctomb(conv,r,wc,n); + if (ret != RET_ILUNI) { + if (ret != 2) abort(); + if (!(r[0] == 0x28 && r[1] >= 0x21 && r[1] <= 0x40)) + return ret; + } + /* Row 0x2A is GB_1988-80. */ + ret = iso646_cn_wctomb(conv,buf,wc,1); + if (ret != RET_ILUNI) { + if (ret != 1) abort(); + if (buf[0] >= 0x21 && buf[0] < 0x7f) { + if (n >= 2) { + r[0] = 0x2a; + r[1] = buf[0]; + return 2; + } + return RET_TOOSMALL; + } + } + /* Try the Unicode -> ISO-IR-165 extensions table. */ + ret = isoir165ext_wctomb(conv,r,wc,n); + return ret; +} |