/* * Copyright (C) 1999-2002, 2005 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., 51 Franklin Street, * Fifth Floor, Boston, MA 02110-1301, USA. */ /* * CP932 */ /* * Microsoft CP932 is a slightly extended version of SHIFT_JIS. * The differences between the EASTASIA/JIS/SHIFTJIS.TXT and the * VENDORS/MICSFT/WINDOWS/CP932.TXT tables found on ftp.unicode.org are * as follows: * * 1. CP932 uses ASCII, not JISX0201 Roman. * * 2. Some characters in the JISX0208 range are defined differently: * * code SHIFTJIS.TXT CP932.TXT * 0x815F 0x005C # REVERSE SOLIDUS 0xFF3C # FULLWIDTH REVERSE SOLIDUS * 0x8160 0x301C # WAVE DASH 0xFF5E # FULLWIDTH TILDE * 0x8161 0x2016 # DOUBLE VERTICAL LINE 0x2225 # PARALLEL TO * 0x817C 0x2212 # MINUS SIGN 0xFF0D # FULLWIDTH HYPHEN-MINUS * 0x8191 0x00A2 # CENT SIGN 0xFFE0 # FULLWIDTH CENT SIGN * 0x8192 0x00A3 # POUND SIGN 0xFFE1 # FULLWIDTH POUND SIGN * 0x81CA 0x00AC # NOT SIGN 0xFFE2 # FULLWIDTH NOT SIGN * * We don't implement the latter 6 of these changes, only the first one. * SHIFTJIS.TXT makes more sense. However, as a compromise with user * expectation, we implement the middle 5 of these changes in the * Unicode to CP932 direction. We don't implement the last one at all, * because it would collide with the mapping of 0xFA54. * * 3. A few new rows. See cp932ext.h. * * Many variants of CP932 (in GNU libc, JDK, OSF/1, Windows-2000, ICU) also * add: * * 4. Private area mappings: * * code Unicode * 0x{F0..F9}{40..7E,80..FC} U+E000..U+E757 * * We add them too because, although there are backward compatibility problems * when a character from a private area is moved to an official Unicode code * point, they are useful for some people in practice. */ #include "cp932ext.h" /* 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 cp932_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, int n) { unsigned char c = *s; if (c < 0x80) return ascii_mbtowc(conv,pwc,s,n); else if (c >= 0xa1 && c <= 0xdf) return jisx0201_mbtowc(conv,pwc,s,n); else { unsigned char s1, s2; s1 = c; if ((s1 >= 0x81 && s1 <= 0x9f && s1 != 0x87) || (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 == 0x87) || (s1 >= 0xed && s1 <= 0xee) || (s1 >= 0xfa)) { if (n < 2) return RET_TOOFEW(0); return cp932ext_mbtowc(conv,pwc,s,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 cp932_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, int n) { unsigned char buf[2]; int ret; /* Try ASCII. */ ret = ascii_wctomb(conv,buf,wc,1); if (ret != RET_ILUNI) { unsigned char c; if (ret != 1) abort(); c = buf[0]; if (c < 0x80) { r[0] = c; return 1; } } /* Try JIS X 0201-1976 Katakana. */ ret = jisx0201_wctomb(conv,buf,wc,1); if (ret != RET_ILUNI) { unsigned char c; if (ret != 1) abort(); c = buf[0]; if (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; } } /* Try CP932 extensions. */ ret = cp932ext_wctomb(conv,buf,wc,2); if (ret != RET_ILUNI) { if (ret != 2) abort(); if (n < 2) return RET_TOOSMALL; r[0] = buf[0]; r[1] = buf[1]; 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; } /* Irreversible mappings. */ if (wc == 0xff5e) { if (n < 2) return RET_TOOSMALL; r[0] = 0x81; r[1] = 0x60; return 2; } if (wc == 0x2225) { if (n < 2) return RET_TOOSMALL; r[0] = 0x81; r[1] = 0x61; return 2; } if (wc == 0xff0d) { if (n < 2) return RET_TOOSMALL; r[0] = 0x81; r[1] = 0x7c; return 2; } if (wc == 0xffe0) { if (n < 2) return RET_TOOSMALL; r[0] = 0x81; r[1] = 0x91; return 2; } if (wc == 0xffe1) { if (n < 2) return RET_TOOSMALL; r[0] = 0x81; r[1] = 0x92; return 2; } return RET_ILUNI; }