lib/libc/citrus/citrus_ctype_fallback.c

   1 /* $NetBSD: src/lib/libc/citrus/citrus_ctype_fallback.c,v 1.2 2003/06/27 14:52:25 yamt Exp $ */
   2 /* $DragonFly: src/lib/libc/citrus/citrus_ctype_fallback.c,v 1.2 2008/04/10 10:21:01 hasso Exp $ */
   3
   4 /*-
   5  * Copyright (c)2003 Citrus Project,
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  */
  29
  30 #include <sys/types.h>
  31 #include <assert.h>
  32 #include <wchar.h>
  33 #include <stdio.h>
  34 #include <string.h>
  35 #include <limits.h>
  36
  37 #include "citrus_module.h"
  38 #include "citrus_ctype.h"
  39 #include "citrus_ctype_fallback.h"
  40
  41 /*
  42  * for ABI version >= 0x00000002
  43  */
  44
  45 int
  46 _citrus_ctype_btowc_fallback(_citrus_ctype_rec_t * __restrict cc,
  47                              int c, wint_t * __restrict wcresult)
  48 {
  49         char mb;
  50         /*
  51          * what we need is _PRIVSIZE
  52          * and we know that it's smaller than sizeof(mbstate_t).
  53          */
  54         char pspriv[sizeof(mbstate_t)];
  55         wchar_t wc;
  56         size_t nr;
  57         int err;
  58
  59         _DIAGASSERT(cc != NULL && cc->cc_closure != NULL);
  60
  61         if (c == EOF) {
  62                 *wcresult = WEOF;
  63                 return 0;
  64         }
  65
  66         memset(&pspriv, 0, sizeof(pspriv));
  67         mb = (char)(unsigned)c;
  68         err = _citrus_ctype_mbrtowc(cc, &wc, &mb, 1, (void *)&pspriv, &nr);
  69         if (!err && (nr == 0 || nr == 1))
  70                 *wcresult = wc;
  71         else
  72                 *wcresult = WEOF;
  73
  74         return 0;
  75 }
  76
  77 int
  78 _citrus_ctype_wctob_fallback(_citrus_ctype_rec_t * __restrict cc,
  79                              wint_t wc, int * __restrict cresult)
  80 {
  81         /*
  82          * what we need is _PRIVSIZE
  83          * and we know that it's smaller than sizeof(mbstate_t).
  84          */
  85         char pspriv[sizeof(mbstate_t)];
  86         char buf[MB_LEN_MAX];
  87         size_t nr;
  88         int err;
  89
  90         _DIAGASSERT(cc != NULL && cc->cc_closure != NULL);
  91
  92         if (wc == WEOF) {
  93                 *cresult = EOF;
  94                 return 0;
  95         }
  96         memset(&pspriv, 0, sizeof(pspriv));
  97         err = _citrus_ctype_wcrtomb(cc, buf, (wchar_t)wc, (void *)&pspriv, &nr);
  98         if (!err && nr == 1)
  99                 *cresult = buf[0];
 100         else
 101                 *cresult = EOF;
 102
 103         return 0;
 104 }