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Diffstat (limited to 'MSVC/iconv/sjis.h')
| -rw-r--r-- | MSVC/iconv/sjis.h | 132 |
1 files changed, 132 insertions, 0 deletions
diff --git a/MSVC/iconv/sjis.h b/MSVC/iconv/sjis.h new file mode 100644 index 0000000..148258d --- /dev/null +++ b/MSVC/iconv/sjis.h @@ -0,0 +1,132 @@ +/* + * Copyright (C) 1999-2002 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. + */ + +/* + * SHIFT_JIS + */ + +/* + Conversion between SJIS codes (s1,s2) and JISX0208 codes (c1,c2): + Example. (s1,s2) = 0x8140, (c1,c2) = 0x2121. + 0x81 <= s1 <= 0x9F || 0xE0 <= s1 <= 0xEA, + 0x40 <= s2 <= 0x7E || 0x80 <= s2 <= 0xFC, + 0x21 <= c1 <= 0x74, 0x21 <= c2 <= 0x7E. + Invariant: + 94*2*(s1 < 0xE0 ? s1-0x81 : s1-0xC1) + (s2 < 0x80 ? s2-0x40 : s2-0x41) + = 94*(c1-0x21)+(c2-0x21) + Conversion (s1,s2) -> (c1,c2): + t1 := (s1 < 0xE0 ? s1-0x81 : s1-0xC1) + t2 := (s2 < 0x80 ? s2-0x40 : s2-0x41) + c1 := 2*t1 + (t2 < 0x5E ? 0 : 1) + 0x21 + c2 := (t2 < 0x5E ? t2 : t2-0x5E) + 0x21 + Conversion (c1,c2) -> (s1,s2): + t1 := (c1 - 0x21) >> 1 + t2 := ((c1 - 0x21) & 1) * 0x5E + (c2 - 0x21) + s1 := (t1 < 0x1F ? t1+0x81 : t1+0xC1) + s2 := (t2 < 0x3F ? t2+0x40 : t2+0x41) + */ + +static int +sjis_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, int n) +{ + unsigned char c = *s; + if (c < 0x80 || (c >= 0xa1 && c <= 0xdf)) + return jisx0201_mbtowc(conv,pwc,s,n); + else { + unsigned char s1, s2; + s1 = c; + if ((s1 >= 0x81 && s1 <= 0x9f) || (s1 >= 0xe0 && s1 <= 0xea)) { + if (n < 2) + return RET_TOOFEW(0); + s2 = s[1]; + if ((s2 >= 0x40 && s2 <= 0x7e) || (s2 >= 0x80 && s2 <= 0xfc)) { + unsigned char t1 = (s1 < 0xe0 ? s1-0x81 : s1-0xc1); + unsigned char t2 = (s2 < 0x80 ? s2-0x40 : s2-0x41); + unsigned char buf[2]; + buf[0] = 2*t1 + (t2 < 0x5e ? 0 : 1) + 0x21; + buf[1] = (t2 < 0x5e ? t2 : t2-0x5e) + 0x21; + return jisx0208_mbtowc(conv,pwc,buf,2); + } + } else if (s1 >= 0xf0 && s1 <= 0xf9) { + /* User-defined range. See + * Ken Lunde's "CJKV Information Processing", table 4-66, p. 206. */ + if (n < 2) + return RET_TOOFEW(0); + s2 = s[1]; + if ((s2 >= 0x40 && s2 <= 0x7e) || (s2 >= 0x80 && s2 <= 0xfc)) { + *pwc = 0xe000 + 188*(s1 - 0xf0) + (s2 < 0x80 ? s2-0x40 : s2-0x41); + return 2; + } + } + return RET_ILSEQ; + } +} + +static int +sjis_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, int n) +{ + unsigned char buf[2]; + int ret; + + /* Try JIS X 0201-1976. */ + ret = jisx0201_wctomb(conv,buf,wc,1); + if (ret != RET_ILUNI) { + unsigned char c; + if (ret != 1) abort(); + c = buf[0]; + if (c < 0x80 || (c >= 0xa1 && c <= 0xdf)) { + r[0] = c; + return 1; + } + } + + /* Try JIS X 0208-1990. */ + ret = jisx0208_wctomb(conv,buf,wc,2); + if (ret != RET_ILUNI) { + unsigned char c1, c2; + if (ret != 2) abort(); + if (n < 2) + return RET_TOOSMALL; + c1 = buf[0]; + c2 = buf[1]; + if ((c1 >= 0x21 && c1 <= 0x74) && (c2 >= 0x21 && c2 <= 0x7e)) { + unsigned char t1 = (c1 - 0x21) >> 1; + unsigned char t2 = (((c1 - 0x21) & 1) ? 0x5e : 0) + (c2 - 0x21); + r[0] = (t1 < 0x1f ? t1+0x81 : t1+0xc1); + r[1] = (t2 < 0x3f ? t2+0x40 : t2+0x41); + return 2; + } + } + + /* User-defined range. See + * Ken Lunde's "CJKV Information Processing", table 4-66, p. 206. */ + if (wc >= 0xe000 && wc < 0xe758) { + unsigned char c1, c2; + if (n < 2) + return RET_TOOSMALL; + c1 = (unsigned int) (wc - 0xe000) / 188; + c2 = (unsigned int) (wc - 0xe000) % 188; + r[0] = c1+0xf0; + r[1] = (c2 < 0x3f ? c2+0x40 : c2+0x41); + return 2; + } + + return RET_ILUNI; +} |