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Annotation of embedaddon/libiconv/lib/dec_hanyu.h, revision 1.1.1.2

1.1       misho       1: /*
1.1.1.2 ! misho       2:  * Copyright (C) 2001, 2005, 2016 Free Software Foundation, Inc.
1.1       misho       3:  * This file is part of the GNU LIBICONV Library.
                      4:  *
                      5:  * The GNU LIBICONV Library is free software; you can redistribute it
                      6:  * and/or modify it under the terms of the GNU Library General Public
                      7:  * License as published by the Free Software Foundation; either version 2
                      8:  * of the License, or (at your option) any later version.
                      9:  *
                     10:  * The GNU LIBICONV Library is distributed in the hope that it will be
                     11:  * useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
                     12:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
                     13:  * Library General Public License for more details.
                     14:  *
                     15:  * You should have received a copy of the GNU Library General Public
                     16:  * License along with the GNU LIBICONV Library; see the file COPYING.LIB.
1.1.1.2 ! misho      17:  * If not, see <https://www.gnu.org/licenses/>.
1.1       misho      18:  */
                     19: 
                     20: /*
                     21:  * DEC-HANYU
                     22:  */
                     23: 
                     24: static int
1.1.1.2 ! misho      25: dec_hanyu_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, size_t n)
1.1       misho      26: {
                     27:   unsigned char c = *s;
                     28:   /* Code set 0 (ASCII) */
                     29:   if (c < 0x80)
                     30:     return ascii_mbtowc(conv,pwc,s,n);
                     31:   /* Code set 1 (CNS 11643-1992 Plane 1),
                     32:      Code set 2 (CNS 11643-1992 Plane 2),
                     33:      Code set 3 (CNS 11643-1992 Plane 3) */
                     34:   if (c >= 0xa1 && c < 0xff) {
                     35:     if (n < 2)
                     36:       return RET_TOOFEW(0);
                     37:     {
                     38:       unsigned char c2 = s[1];
                     39:       if (c == 0xc2 && c2 == 0xcb) {
                     40:         if (n < 4)
                     41:           return RET_TOOFEW(0);
                     42:         if (s[2] >= 0xa1 && s[2] < 0xff && s[3] >= 0xa1 && s[3] < 0xff) {
                     43:           unsigned char buf[2];
                     44:           int ret;
                     45:           buf[0] = s[2]-0x80; buf[1] = s[3]-0x80;
                     46:           ret = cns11643_3_mbtowc(conv,pwc,buf,2);
                     47:           if (ret != RET_ILSEQ) {
                     48:             if (ret != 2) abort();
                     49:             return 4;
                     50:           }
                     51:         }
                     52:       } else if (c2 >= 0xa1 && c2 < 0xff) {
                     53:         if (c != 0xc2 || c2 < 0xc2) {
                     54:           unsigned char buf[2];
                     55:           buf[0] = c-0x80; buf[1] = c2-0x80;
                     56:           return cns11643_1_mbtowc(conv,pwc,buf,2);
                     57:         }
                     58:       } else if (c2 >= 0x21 && c2 < 0x7f) {
                     59:         unsigned char buf[2];
                     60:         buf[0] = c-0x80; buf[1] = c2;
                     61:         return cns11643_2_mbtowc(conv,pwc,buf,2);
                     62:       }
                     63:     }
                     64:   }
                     65:   return RET_ILSEQ;
                     66: }
                     67: 
                     68: static int
1.1.1.2 ! misho      69: dec_hanyu_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, size_t n)
1.1       misho      70: {
                     71:   unsigned char buf[3];
                     72:   int ret;
                     73: 
                     74:   /* Code set 0 (ASCII) */
                     75:   ret = ascii_wctomb(conv,r,wc,n);
                     76:   if (ret != RET_ILUNI)
                     77:     return ret;
                     78: 
                     79:   ret = cns11643_wctomb(conv,buf,wc,3);
                     80:   if (ret != RET_ILUNI) {
                     81:     if (ret != 3) abort();
                     82: 
                     83:     /* Code set 1 (CNS 11643-1992 Plane 1) */
                     84:     if (buf[0] == 1 && (buf[1] != 0x42 || buf[2] < 0x42)) {
                     85:       if (n < 2)
                     86:         return RET_TOOSMALL;
                     87:       r[0] = buf[1]+0x80;
                     88:       r[1] = buf[2]+0x80;
                     89:       return 2;
                     90:     }
                     91: 
                     92:     /* Code set 2 (CNS 11643-1992 Plane 2) */
                     93:     if (buf[0] == 2) {
                     94:       if (n < 2)
                     95:         return RET_TOOSMALL;
                     96:       r[0] = buf[1]+0x80;
                     97:       r[1] = buf[2];
                     98:       return 2;
                     99:     }
                    100: 
                    101:     /* Code set 3 (CNS 11643-1992 Plane 3) */
                    102:     if (buf[0] == 3) {
                    103:       if (n < 4)
                    104:         return RET_TOOSMALL;
                    105:       r[0] = 0xc2;
                    106:       r[1] = 0xcb;
                    107:       r[2] = buf[1]+0x80;
                    108:       r[3] = buf[2]+0x80;
                    109:       return 4;
                    110:     }
                    111:   }
                    112: 
                    113:   return RET_ILUNI;
                    114: }