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

1.1       misho       1: /*
1.1.1.2 ! misho       2:  * Copyright (C) 1999-2001, 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:  * EUC-TW
                     22:  */
                     23: 
                     24: static int
1.1.1.2 ! misho      25: euc_tw_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:   if (c >= 0xa1 && c < 0xff) {
                     33:     if (n < 2)
                     34:       return RET_TOOFEW(0);
                     35:     {
                     36:       unsigned char c2 = s[1];
                     37:       if (c2 >= 0xa1 && c2 < 0xff) {
                     38:         unsigned char buf[2];
                     39:         buf[0] = c-0x80; buf[1] = c2-0x80;
                     40:         return cns11643_1_mbtowc(conv,pwc,buf,2);
                     41:       } else
                     42:         return RET_ILSEQ;
                     43:     }
                     44:   }
                     45:   /* Code set 2 (CNS 11643-1992 Planes 1-16) */
                     46:   if (c == 0x8e) {
                     47:     if (n < 4)
                     48:       return RET_TOOFEW(0);
                     49:     {
                     50:       unsigned char c2 = s[1];
                     51:       if (c2 >= 0xa1 && c2 <= 0xb0) {
                     52:         unsigned char c3 = s[2];
                     53:         unsigned char c4 = s[3];
                     54:         if (c3 >= 0xa1 && c3 < 0xff && c4 >= 0xa1 && c4 < 0xff) {
                     55:           unsigned char buf[2];
                     56:           int ret;
                     57:           buf[0] = c3-0x80; buf[1] = c4-0x80;
                     58:           switch (c2-0xa0) {
                     59:             case 1: ret = cns11643_1_mbtowc(conv,pwc,buf,2); break;
                     60:             case 2: ret = cns11643_2_mbtowc(conv,pwc,buf,2); break;
                     61:             case 3: ret = cns11643_3_mbtowc(conv,pwc,buf,2); break;
                     62:             case 4: ret = cns11643_4_mbtowc(conv,pwc,buf,2); break;
                     63:             case 5: ret = cns11643_5_mbtowc(conv,pwc,buf,2); break;
                     64:             case 6: ret = cns11643_6_mbtowc(conv,pwc,buf,2); break;
                     65:             case 7: ret = cns11643_7_mbtowc(conv,pwc,buf,2); break;
                     66:             case 15: ret = cns11643_15_mbtowc(conv,pwc,buf,2); break;
                     67:             default: return RET_ILSEQ;
                     68:           }
                     69:           if (ret == RET_ILSEQ)
                     70:             return RET_ILSEQ;
                     71:           if (ret != 2) abort();
                     72:           return 4;
                     73:         }
                     74:       }
                     75:     }
                     76:   }
                     77:   return RET_ILSEQ;
                     78: }
                     79: 
                     80: static int
1.1.1.2 ! misho      81: euc_tw_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, size_t n)
1.1       misho      82: {
                     83:   unsigned char buf[3];
                     84:   int ret;
                     85: 
                     86:   /* Code set 0 (ASCII) */
                     87:   ret = ascii_wctomb(conv,r,wc,n);
                     88:   if (ret != RET_ILUNI)
                     89:     return ret;
                     90: 
                     91:   ret = cns11643_wctomb(conv,buf,wc,3);
                     92:   if (ret != RET_ILUNI) {
                     93:     if (ret != 3) abort();
                     94: 
                     95:     /* Code set 1 (CNS 11643-1992 Plane 1) */
                     96:     if (buf[0] == 1) {
                     97:       if (n < 2)
                     98:         return RET_TOOSMALL;
                     99:       r[0] = buf[1]+0x80;
                    100:       r[1] = buf[2]+0x80;
                    101:       return 2;
                    102:     }
                    103: 
                    104:     /* Code set 2 (CNS 11643-1992 Planes 1-16) */
                    105:     if (n < 4)
                    106:       return RET_TOOSMALL;
                    107:     r[0] = 0x8e;
                    108:     r[1] = buf[0]+0xa0;
                    109:     r[2] = buf[1]+0x80;
                    110:     r[3] = buf[2]+0x80;
                    111:     return 4;
                    112:   }
                    113: 
                    114:   return RET_ILUNI;
                    115: }