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libiconv 1.16

    1: /*
    2:  * Copyright (C) 1999-2001, 2016 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, see <https://www.gnu.org/licenses/>.
   18:  */
   19: 
   20: /*
   21:  * UCS-2-INTERNAL = UCS-2 with machine dependent endianness and alignment
   22:  */
   23: 
   24: static int
   25: ucs2internal_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, size_t n)
   26: {
   27:   if (n >= 2) {
   28:     unsigned short x = *(const unsigned short *)s;
   29:     if (x >= 0xd800 && x < 0xe000) {
   30:       return RET_ILSEQ;
   31:     } else {
   32:       *pwc = x;
   33:       return 2;
   34:     }
   35:   }
   36:   return RET_TOOFEW(0);
   37: }
   38: 
   39: static int
   40: ucs2internal_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, size_t n)
   41: {
   42:   if (wc < 0x10000 && !(wc >= 0xd800 && wc < 0xe000)) {
   43:     if (n >= 2) {
   44:       *(unsigned short *)r = wc;
   45:       return 2;
   46:     } else
   47:       return RET_TOOSMALL;
   48:   } else
   49:     return RET_ILUNI;
   50: }