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FreeBSD/Linux Kernel Cross Reference
sys/locale/wctrans.c

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    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: stable/6/lib/libc/locale/wctrans.c 121852 2003-11-01 08:20:58Z tjr $");
   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 }

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