| /* |
| * 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., 51 Franklin Street, |
| * Fifth Floor, Boston, MA 02110-1301, USA. |
| */ |
| |
| /* |
| * EUC-TW |
| */ |
| |
| static int |
| euc_tw_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, int 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) */ |
| if (c >= 0xa1 && c < 0xff) { |
| if (n < 2) |
| return RET_TOOFEW(0); |
| { |
| unsigned char c2 = s[1]; |
| if (c2 >= 0xa1 && c2 < 0xff) { |
| unsigned char buf[2]; |
| buf[0] = c-0x80; buf[1] = c2-0x80; |
| return cns11643_1_mbtowc(conv,pwc,buf,2); |
| } else |
| return RET_ILSEQ; |
| } |
| } |
| /* Code set 2 (CNS 11643-1992 Planes 1-16) */ |
| if (c == 0x8e) { |
| if (n < 4) |
| return RET_TOOFEW(0); |
| { |
| unsigned char c2 = s[1]; |
| if (c2 >= 0xa1 && c2 <= 0xb0) { |
| unsigned char c3 = s[2]; |
| unsigned char c4 = s[3]; |
| if (c3 >= 0xa1 && c3 < 0xff && c4 >= 0xa1 && c4 < 0xff) { |
| unsigned char buf[2]; |
| int ret; |
| buf[0] = c3-0x80; buf[1] = c4-0x80; |
| switch (c2-0xa0) { |
| case 1: ret = cns11643_1_mbtowc(conv,pwc,buf,2); break; |
| case 2: ret = cns11643_2_mbtowc(conv,pwc,buf,2); break; |
| case 3: ret = cns11643_3_mbtowc(conv,pwc,buf,2); break; |
| case 4: ret = cns11643_4_mbtowc(conv,pwc,buf,2); break; |
| case 5: ret = cns11643_5_mbtowc(conv,pwc,buf,2); break; |
| case 6: ret = cns11643_6_mbtowc(conv,pwc,buf,2); break; |
| case 7: ret = cns11643_7_mbtowc(conv,pwc,buf,2); break; |
| case 15: ret = cns11643_15_mbtowc(conv,pwc,buf,2); break; |
| default: return RET_ILSEQ; |
| } |
| if (ret == RET_ILSEQ) |
| return RET_ILSEQ; |
| if (ret != 2) abort(); |
| return 4; |
| } |
| } |
| } |
| } |
| return RET_ILSEQ; |
| } |
| |
| static int |
| euc_tw_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, int 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) { |
| if (n < 2) |
| return RET_TOOSMALL; |
| r[0] = buf[1]+0x80; |
| r[1] = buf[2]+0x80; |
| return 2; |
| } |
| |
| /* Code set 2 (CNS 11643-1992 Planes 1-16) */ |
| if (n < 4) |
| return RET_TOOSMALL; |
| r[0] = 0x8e; |
| r[1] = buf[0]+0xa0; |
| r[2] = buf[1]+0x80; |
| r[3] = buf[2]+0x80; |
| return 4; |
| } |
| |
| return RET_ILUNI; |
| } |