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Annotation of embedaddon/libiconv/lib/dec_hanyu.h, revision 1.1

1.1     ! misho       1: /*
        !             2:  * Copyright (C) 2001, 2005 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:  * DEC-HANYU
        !            23:  */
        !            24: 
        !            25: static int
        !            26: dec_hanyu_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:      Code set 2 (CNS 11643-1992 Plane 2),
        !            34:      Code set 3 (CNS 11643-1992 Plane 3) */
        !            35:   if (c >= 0xa1 && c < 0xff) {
        !            36:     if (n < 2)
        !            37:       return RET_TOOFEW(0);
        !            38:     {
        !            39:       unsigned char c2 = s[1];
        !            40:       if (c == 0xc2 && c2 == 0xcb) {
        !            41:         if (n < 4)
        !            42:           return RET_TOOFEW(0);
        !            43:         if (s[2] >= 0xa1 && s[2] < 0xff && s[3] >= 0xa1 && s[3] < 0xff) {
        !            44:           unsigned char buf[2];
        !            45:           int ret;
        !            46:           buf[0] = s[2]-0x80; buf[1] = s[3]-0x80;
        !            47:           ret = cns11643_3_mbtowc(conv,pwc,buf,2);
        !            48:           if (ret != RET_ILSEQ) {
        !            49:             if (ret != 2) abort();
        !            50:             return 4;
        !            51:           }
        !            52:         }
        !            53:       } else if (c2 >= 0xa1 && c2 < 0xff) {
        !            54:         if (c != 0xc2 || c2 < 0xc2) {
        !            55:           unsigned char buf[2];
        !            56:           buf[0] = c-0x80; buf[1] = c2-0x80;
        !            57:           return cns11643_1_mbtowc(conv,pwc,buf,2);
        !            58:         }
        !            59:       } else if (c2 >= 0x21 && c2 < 0x7f) {
        !            60:         unsigned char buf[2];
        !            61:         buf[0] = c-0x80; buf[1] = c2;
        !            62:         return cns11643_2_mbtowc(conv,pwc,buf,2);
        !            63:       }
        !            64:     }
        !            65:   }
        !            66:   return RET_ILSEQ;
        !            67: }
        !            68: 
        !            69: static int
        !            70: dec_hanyu_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, int n)
        !            71: {
        !            72:   unsigned char buf[3];
        !            73:   int ret;
        !            74: 
        !            75:   /* Code set 0 (ASCII) */
        !            76:   ret = ascii_wctomb(conv,r,wc,n);
        !            77:   if (ret != RET_ILUNI)
        !            78:     return ret;
        !            79: 
        !            80:   ret = cns11643_wctomb(conv,buf,wc,3);
        !            81:   if (ret != RET_ILUNI) {
        !            82:     if (ret != 3) abort();
        !            83: 
        !            84:     /* Code set 1 (CNS 11643-1992 Plane 1) */
        !            85:     if (buf[0] == 1 && (buf[1] != 0x42 || buf[2] < 0x42)) {
        !            86:       if (n < 2)
        !            87:         return RET_TOOSMALL;
        !            88:       r[0] = buf[1]+0x80;
        !            89:       r[1] = buf[2]+0x80;
        !            90:       return 2;
        !            91:     }
        !            92: 
        !            93:     /* Code set 2 (CNS 11643-1992 Plane 2) */
        !            94:     if (buf[0] == 2) {
        !            95:       if (n < 2)
        !            96:         return RET_TOOSMALL;
        !            97:       r[0] = buf[1]+0x80;
        !            98:       r[1] = buf[2];
        !            99:       return 2;
        !           100:     }
        !           101: 
        !           102:     /* Code set 3 (CNS 11643-1992 Plane 3) */
        !           103:     if (buf[0] == 3) {
        !           104:       if (n < 4)
        !           105:         return RET_TOOSMALL;
        !           106:       r[0] = 0xc2;
        !           107:       r[1] = 0xcb;
        !           108:       r[2] = buf[1]+0x80;
        !           109:       r[3] = buf[2]+0x80;
        !           110:       return 4;
        !           111:     }
        !           112:   }
        !           113: 
        !           114:   return RET_ILUNI;
        !           115: }