diff options
Diffstat (limited to 'MSVC/iconv/iso2022_jp.h')
| -rw-r--r-- | MSVC/iconv/iso2022_jp.h | 212 |
1 files changed, 212 insertions, 0 deletions
diff --git a/MSVC/iconv/iso2022_jp.h b/MSVC/iconv/iso2022_jp.h new file mode 100644 index 0000000..a57b228 --- /dev/null +++ b/MSVC/iconv/iso2022_jp.h @@ -0,0 +1,212 @@ +/* + * 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-2022-JP + */ + +/* Specification: RFC 1468 */ + +#define ESC 0x1b + +/* + * The state can be one of the following values. + */ +#define STATE_ASCII 0 +#define STATE_JISX0201ROMAN 1 +#define STATE_JISX0208 2 + +static int +iso2022_jp_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, int n) +{ + state_t state = conv->istate; + int count = 0; + unsigned char c; + for (;;) { + c = *s; + if (c == ESC) { + if (n < count+3) + goto none; + if (s[1] == '(') { + if (s[2] == 'B') { + state = STATE_ASCII; + s += 3; count += 3; + if (n < count+1) + goto none; + continue; + } + if (s[2] == 'J') { + state = STATE_JISX0201ROMAN; + s += 3; count += 3; + if (n < count+1) + goto none; + continue; + } + return RET_ILSEQ; + } + if (s[1] == '$') { + if (s[2] == '@' || s[2] == 'B') { + /* We don't distinguish JIS X 0208-1978 and JIS X 0208-1983. */ + state = STATE_JISX0208; + s += 3; count += 3; + if (n < count+1) + goto none; + continue; + } + return RET_ILSEQ; + } + return RET_ILSEQ; + } + break; + } + switch (state) { + case STATE_ASCII: + if (c < 0x80) { + int ret = ascii_mbtowc(conv,pwc,s,1); + if (ret == RET_ILSEQ) + return RET_ILSEQ; + if (ret != 1) abort(); + conv->istate = state; + return count+1; + } else + return RET_ILSEQ; + case STATE_JISX0201ROMAN: + if (c < 0x80) { + int ret = jisx0201_mbtowc(conv,pwc,s,1); + if (ret == RET_ILSEQ) + return RET_ILSEQ; + if (ret != 1) abort(); + conv->istate = state; + return count+1; + } else + return RET_ILSEQ; + case STATE_JISX0208: + if (n < count+2) + goto none; + if (s[0] < 0x80 && s[1] < 0x80) { + int ret = jisx0208_mbtowc(conv,pwc,s,2); + if (ret == RET_ILSEQ) + return RET_ILSEQ; + if (ret != 2) abort(); + conv->istate = state; + return count+2; + } else + return RET_ILSEQ; + default: abort(); + } + +none: + conv->istate = state; + return RET_TOOFEW(count); +} + +static int +iso2022_jp_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, int n) +{ + state_t state = conv->ostate; + unsigned char buf[2]; + int ret; + + /* Try ASCII. */ + ret = ascii_wctomb(conv,buf,wc,1); + if (ret != RET_ILUNI) { + if (ret != 1) abort(); + if (buf[0] < 0x80) { + int count = (state == STATE_ASCII ? 1 : 4); + if (n < count) + return RET_TOOSMALL; + if (state != STATE_ASCII) { + r[0] = ESC; + r[1] = '('; + r[2] = 'B'; + r += 3; + state = STATE_ASCII; + } + r[0] = buf[0]; + conv->ostate = state; + return count; + } + } + + /* Try JIS X 0201-1976 Roman. */ + ret = jisx0201_wctomb(conv,buf,wc,1); + if (ret != RET_ILUNI) { + if (ret != 1) abort(); + if (buf[0] < 0x80) { + int count = (state == STATE_JISX0201ROMAN ? 1 : 4); + if (n < count) + return RET_TOOSMALL; + if (state != STATE_JISX0201ROMAN) { + r[0] = ESC; + r[1] = '('; + r[2] = 'J'; + r += 3; + state = STATE_JISX0201ROMAN; + } + r[0] = buf[0]; + conv->ostate = state; + return count; + } + } + + /* Try JIS X 0208-1990 in place of JIS X 0208-1978 and JIS X 0208-1983. */ + ret = jisx0208_wctomb(conv,buf,wc,2); + if (ret != RET_ILUNI) { + if (ret != 2) abort(); + if (buf[0] < 0x80 && buf[1] < 0x80) { + int count = (state == STATE_JISX0208 ? 2 : 5); + if (n < count) + return RET_TOOSMALL; + if (state != STATE_JISX0208) { + r[0] = ESC; + r[1] = '$'; + r[2] = 'B'; + r += 3; + state = STATE_JISX0208; + } + r[0] = buf[0]; + r[1] = buf[1]; + conv->ostate = state; + return count; + } + } + + return RET_ILUNI; +} + +static int +iso2022_jp_reset (conv_t conv, unsigned char *r, int n) +{ + state_t state = conv->ostate; + if (state != STATE_ASCII) { + if (n < 3) + return RET_TOOSMALL; + r[0] = ESC; + r[1] = '('; + r[2] = 'B'; + /* conv->ostate = 0; will be done by the caller */ + return 3; + } else + return 0; +} + +#undef STATE_JISX0208 +#undef STATE_JISX0201ROMAN +#undef STATE_ASCII |