usr/src/lib/libc/port/locale/wctrans.c

   1 /*
   2  * Copyright 2013 Garrett D'Amore <garrett@damore.org>
   3  * Copyright 2010 Nexenta Systems, Inc.  All rights reserved.
   4  * Copyright (c) 2002 Tim J. Robbins.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  26  * SUCH DAMAGE.
  27  */
  28
  29 #include "lint.h"
  30 #include <note.h>
  31 #include <errno.h>
  32 #include <string.h>
  33 #include <wctype.h>
  34 #include <locale.h>
  35
  36 enum {
  37         _WCT_ERROR      = 0,
  38         _WCT_TOLOWER    = 1,
  39         _WCT_TOUPPER    = 2
  40 };
  41
  42 wint_t
  43 towctrans_l(wint_t wc, wctrans_t desc, locale_t loc)
  44 {
  45         switch (desc) {
  46         case _WCT_TOLOWER:
  47                 wc = towlower_l(wc, loc);
  48                 break;
  49         case _WCT_TOUPPER:
  50                 wc = towupper_l(wc, loc);
  51                 break;
  52         case _WCT_ERROR:
  53         default:
  54                 errno = EINVAL;
  55                 break;
  56         }
  57
  58         return (wc);
  59 }
  60
  61 wint_t
  62 towctrans(wint_t wc, wctrans_t desc)
  63 {
  64         return (towctrans_l(wc, desc, uselocale(NULL)));
  65 }
  66
  67 /*
  68  * For *now* we don't support locale sensitive transforms besides toupper
  69  * and tolower.
  70  */
  71 wctrans_t
  72 wctrans_l(const char *charclass, locale_t loc)
  73 {
  74         struct {
  75                 const char      *name;
  76                 wctrans_t        trans;
  77         } ccls[] = {
  78                 { "tolower",    _WCT_TOLOWER },
  79                 { "toupper",    _WCT_TOUPPER },
  80                 { NULL,         _WCT_ERROR },           /* Default */
  81         };
  82         int i;
  83         _NOTE(ARGUNUSED(loc));
  84
  85         i = 0;
  86         while (ccls[i].name != NULL && strcmp(ccls[i].name, charclass) != 0)
  87                 i++;
  88
  89         if (ccls[i].trans == _WCT_ERROR)
  90                 errno = EINVAL;
  91         return (ccls[i].trans);
  92 }
  93
  94 wctrans_t
  95 wctrans(const char *charclass)
  96 {
  97         return (wctrans_l(charclass, uselocale(NULL)));
  98 }