| /* |
| * Copyright (C) 2001, 2005, 2016 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 Lesser General Public |
| * License as published by the Free Software Foundation; either version 2.1 |
| * 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 |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with the GNU LIBICONV Library; see the file COPYING.LIB. |
| * If not, see <https://www.gnu.org/licenses/>. |
| */ |
| |
| /* |
| * DEC-HANYU |
| */ |
| |
| static int |
| dec_hanyu_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, size_t n) |
| { |
| unsigned char c = *s; |
| /* Code set 0 (ASCII) */ |
| if (c < 0x80) |
| return ascii_mbtowc(conv,pwc,s,n); |
| /* Code set 1 (CNS 11643-1992 Plane 1), |
| Code set 2 (CNS 11643-1992 Plane 2), |
| Code set 3 (CNS 11643-1992 Plane 3) */ |
| if (c >= 0xa1 && c < 0xff) { |
| if (n < 2) |
| return RET_TOOFEW(0); |
| { |
| unsigned char c2 = s[1]; |
| if (c == 0xc2 && c2 == 0xcb) { |
| if (n < 4) |
| return RET_TOOFEW(0); |
| if (s[2] >= 0xa1 && s[2] < 0xff && s[3] >= 0xa1 && s[3] < 0xff) { |
| unsigned char buf[2]; |
| int ret; |
| buf[0] = s[2]-0x80; buf[1] = s[3]-0x80; |
| ret = cns11643_3_mbtowc(conv,pwc,buf,2); |
| if (ret != RET_ILSEQ) { |
| if (ret != 2) abort(); |
| return 4; |
| } |
| } |
| } else if (c2 >= 0xa1 && c2 < 0xff) { |
| if (c != 0xc2 || c2 < 0xc2) { |
| unsigned char buf[2]; |
| buf[0] = c-0x80; buf[1] = c2-0x80; |
| return cns11643_1_mbtowc(conv,pwc,buf,2); |
| } |
| } else if (c2 >= 0x21 && c2 < 0x7f) { |
| unsigned char buf[2]; |
| buf[0] = c-0x80; buf[1] = c2; |
| return cns11643_2_mbtowc(conv,pwc,buf,2); |
| } |
| } |
| } |
| return RET_ILSEQ; |
| } |
| |
| static int |
| dec_hanyu_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, size_t n) |
| { |
| unsigned char buf[3]; |
| int ret; |
| |
| /* Code set 0 (ASCII) */ |
| ret = ascii_wctomb(conv,r,wc,n); |
| if (ret != RET_ILUNI) |
| return ret; |
| |
| ret = cns11643_wctomb(conv,buf,wc,3); |
| if (ret != RET_ILUNI) { |
| if (ret != 3) abort(); |
| |
| /* Code set 1 (CNS 11643-1992 Plane 1) */ |
| if (buf[0] == 1 && (buf[1] != 0x42 || buf[2] < 0x42)) { |
| if (n < 2) |
| return RET_TOOSMALL; |
| r[0] = buf[1]+0x80; |
| r[1] = buf[2]+0x80; |
| return 2; |
| } |
| |
| /* Code set 2 (CNS 11643-1992 Plane 2) */ |
| if (buf[0] == 2) { |
| if (n < 2) |
| return RET_TOOSMALL; |
| r[0] = buf[1]+0x80; |
| r[1] = buf[2]; |
| return 2; |
| } |
| |
| /* Code set 3 (CNS 11643-1992 Plane 3) */ |
| if (buf[0] == 3) { |
| if (n < 4) |
| return RET_TOOSMALL; |
| r[0] = 0xc2; |
| r[1] = 0xcb; |
| r[2] = buf[1]+0x80; |
| r[3] = buf[2]+0x80; |
| return 4; |
| } |
| } |
| |
| return RET_ILUNI; |
| } |