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Annotation of embedaddon/libiconv/lib/euc_tw.h, revision 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: }