| /* |
| * Copyright (C) 1999-2001, 2008 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. |
| */ |
| |
| /* |
| * ISO-2022-JP-1 |
| */ |
| |
| /* Specification: RFC 2237 */ |
| |
| #define ESC 0x1b |
| |
| /* |
| * The state can be one of the following values. |
| */ |
| #define STATE_ASCII 0 |
| #define STATE_JISX0201ROMAN 1 |
| #define STATE_JISX0208 2 |
| #define STATE_JISX0212 3 |
| |
| static int |
| iso2022_jp1_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; |
| } |
| goto 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; |
| } |
| if (s[2] == '(') { |
| if (n < count+4) |
| goto none; |
| if (s[3] == 'D') { |
| state = STATE_JISX0212; |
| s += 4; count += 4; |
| if (n < count+1) |
| goto none; |
| continue; |
| } |
| } |
| goto ilseq; |
| } |
| goto ilseq; |
| } |
| break; |
| } |
| switch (state) { |
| case STATE_ASCII: |
| if (c < 0x80) { |
| int ret = ascii_mbtowc(conv,pwc,s,1); |
| if (ret == RET_ILSEQ) |
| goto ilseq; |
| if (ret != 1) abort(); |
| conv->istate = state; |
| return count+1; |
| } else |
| goto ilseq; |
| case STATE_JISX0201ROMAN: |
| if (c < 0x80) { |
| int ret = jisx0201_mbtowc(conv,pwc,s,1); |
| if (ret == RET_ILSEQ) |
| goto ilseq; |
| if (ret != 1) abort(); |
| conv->istate = state; |
| return count+1; |
| } else |
| goto 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) |
| goto ilseq; |
| if (ret != 2) abort(); |
| conv->istate = state; |
| return count+2; |
| } else |
| goto ilseq; |
| case STATE_JISX0212: |
| if (n < count+2) |
| goto none; |
| if (s[0] < 0x80 && s[1] < 0x80) { |
| int ret = jisx0212_mbtowc(conv,pwc,s,2); |
| if (ret == RET_ILSEQ) |
| goto ilseq; |
| if (ret != 2) abort(); |
| conv->istate = state; |
| return count+2; |
| } else |
| goto ilseq; |
| default: abort(); |
| } |
| |
| none: |
| conv->istate = state; |
| return RET_TOOFEW(count); |
| |
| ilseq: |
| conv->istate = state; |
| return RET_SHIFT_ILSEQ(count); |
| } |
| |
| static int |
| iso2022_jp1_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; |
| } |
| } |
| |
| /* Try JIS X 0212-1990. */ |
| ret = jisx0212_wctomb(conv,buf,wc,2); |
| if (ret != RET_ILUNI) { |
| if (ret != 2) abort(); |
| if (buf[0] < 0x80 && buf[1] < 0x80) { |
| int count = (state == STATE_JISX0212 ? 2 : 6); |
| if (n < count) |
| return RET_TOOSMALL; |
| if (state != STATE_JISX0212) { |
| r[0] = ESC; |
| r[1] = '$'; |
| r[2] = '('; |
| r[3] = 'D'; |
| r += 4; |
| state = STATE_JISX0212; |
| } |
| r[0] = buf[0]; |
| r[1] = buf[1]; |
| conv->ostate = state; |
| return count; |
| } |
| } |
| |
| return RET_ILUNI; |
| } |
| |
| static int |
| iso2022_jp1_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_JISX0212 |
| #undef STATE_JISX0208 |
| #undef STATE_JISX0201ROMAN |
| #undef STATE_ASCII |
