compiler/clib/locale/wctrans.c

   1 /*-
   2  * Copyright (c) 2002 Tim J. Robbins.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  */
  26
  27 #include <sys/cdefs.h>
  28 __FBSDID("$FreeBSD: src/lib/libc/locale/wctrans.c,v 1.3 2003/11/01 08:20:58 tjr Exp $");
  29
  30 #include <errno.h>
  31 #include <string.h>
  32 #include <wctype.h>
  33
  34 enum {
  35         _WCT_ERROR      = 0,
  36         _WCT_TOLOWER    = 1,
  37         _WCT_TOUPPER    = 2
  38 };
  39
  40 wint_t
  41 towctrans(wint_t wc, wctrans_t desc)
  42 {
  43
  44         switch (desc) {
  45         case _WCT_TOLOWER:
  46                 wc = towlower(wc);
  47                 break;
  48         case _WCT_TOUPPER:
  49                 wc = towupper(wc);
  50                 break;
  51         case _WCT_ERROR:
  52         default:
  53                 errno = EINVAL;
  54                 break;
  55         }
  56
  57         return (wc);
  58 }
  59
  60 wctrans_t
  61 wctrans(const char *charclass)
  62 {
  63         struct {
  64                 const char      *name;
  65                 wctrans_t        trans;
  66         } ccls[] = {
  67                 { "tolower",    _WCT_TOLOWER },
  68                 { "toupper",    _WCT_TOUPPER },
  69                 { NULL,         _WCT_ERROR },           /* Default */
  70         };
  71         int i;
  72
  73         i = 0;
  74         while (ccls[i].name != NULL && strcmp(ccls[i].name, charclass) != 0)
  75                 i++;
  76
  77         if (ccls[i].trans == _WCT_ERROR)
  78                 errno = EINVAL;
  79         return (ccls[i].trans);
  80 }