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Annotation of embedaddon/libiconv/lib/euc_tw.h, revision 1.1.1.1

1.1       misho       1: /*
                      2:  * Copyright (C) 1999-2001 Free Software Foundation, Inc.
                      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.
                     17:  * If not, write to the Free Software Foundation, Inc., 51 Franklin Street,
                     18:  * Fifth Floor, Boston, MA 02110-1301, USA.
                     19:  */
                     20: 
                     21: /*
                     22:  * EUC-TW
                     23:  */
                     24: 
                     25: static int
                     26: euc_tw_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, int n)
                     27: {
                     28:   unsigned char c = *s;
                     29:   /* Code set 0 (ASCII) */
                     30:   if (c < 0x80)
                     31:     return ascii_mbtowc(conv,pwc,s,n);
                     32:   /* Code set 1 (CNS 11643-1992 Plane 1) */
                     33:   if (c >= 0xa1 && c < 0xff) {
                     34:     if (n < 2)
                     35:       return RET_TOOFEW(0);
                     36:     {
                     37:       unsigned char c2 = s[1];
                     38:       if (c2 >= 0xa1 && c2 < 0xff) {
                     39:         unsigned char buf[2];
                     40:         buf[0] = c-0x80; buf[1] = c2-0x80;
                     41:         return cns11643_1_mbtowc(conv,pwc,buf,2);
                     42:       } else
                     43:         return RET_ILSEQ;
                     44:     }
                     45:   }
                     46:   /* Code set 2 (CNS 11643-1992 Planes 1-16) */
                     47:   if (c == 0x8e) {
                     48:     if (n < 4)
                     49:       return RET_TOOFEW(0);
                     50:     {
                     51:       unsigned char c2 = s[1];
                     52:       if (c2 >= 0xa1 && c2 <= 0xb0) {
                     53:         unsigned char c3 = s[2];
                     54:         unsigned char c4 = s[3];
                     55:         if (c3 >= 0xa1 && c3 < 0xff && c4 >= 0xa1 && c4 < 0xff) {
                     56:           unsigned char buf[2];
                     57:           int ret;
                     58:           buf[0] = c3-0x80; buf[1] = c4-0x80;
                     59:           switch (c2-0xa0) {
                     60:             case 1: ret = cns11643_1_mbtowc(conv,pwc,buf,2); break;
                     61:             case 2: ret = cns11643_2_mbtowc(conv,pwc,buf,2); break;
                     62:             case 3: ret = cns11643_3_mbtowc(conv,pwc,buf,2); break;
                     63:             case 4: ret = cns11643_4_mbtowc(conv,pwc,buf,2); break;
                     64:             case 5: ret = cns11643_5_mbtowc(conv,pwc,buf,2); break;
                     65:             case 6: ret = cns11643_6_mbtowc(conv,pwc,buf,2); break;
                     66:             case 7: ret = cns11643_7_mbtowc(conv,pwc,buf,2); break;
                     67:             case 15: ret = cns11643_15_mbtowc(conv,pwc,buf,2); break;
                     68:             default: return RET_ILSEQ;
                     69:           }
                     70:           if (ret == RET_ILSEQ)
                     71:             return RET_ILSEQ;
                     72:           if (ret != 2) abort();
                     73:           return 4;
                     74:         }
                     75:       }
                     76:     }
                     77:   }
                     78:   return RET_ILSEQ;
                     79: }
                     80: 
                     81: static int
                     82: euc_tw_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, int n)
                     83: {
                     84:   unsigned char buf[3];
                     85:   int ret;
                     86: 
                     87:   /* Code set 0 (ASCII) */
                     88:   ret = ascii_wctomb(conv,r,wc,n);
                     89:   if (ret != RET_ILUNI)
                     90:     return ret;
                     91: 
                     92:   ret = cns11643_wctomb(conv,buf,wc,3);
                     93:   if (ret != RET_ILUNI) {
                     94:     if (ret != 3) abort();
                     95: 
                     96:     /* Code set 1 (CNS 11643-1992 Plane 1) */
                     97:     if (buf[0] == 1) {
                     98:       if (n < 2)
                     99:         return RET_TOOSMALL;
                    100:       r[0] = buf[1]+0x80;
                    101:       r[1] = buf[2]+0x80;
                    102:       return 2;
                    103:     }
                    104: 
                    105:     /* Code set 2 (CNS 11643-1992 Planes 1-16) */
                    106:     if (n < 4)
                    107:       return RET_TOOSMALL;
                    108:     r[0] = 0x8e;
                    109:     r[1] = buf[0]+0xa0;
                    110:     r[2] = buf[1]+0x80;
                    111:     r[3] = buf[2]+0x80;
                    112:     return 4;
                    113:   }
                    114: 
                    115:   return RET_ILUNI;
                    116: }