newlib/libc/ctype/wctrans.c

   1 /* Copyright (c) 2002 Red Hat Incorporated.
   2    All rights reserved.
   3
   4    Redistribution and use in source and binary forms, with or without
   5    modification, are permitted provided that the following conditions are met:
   6
   7      Redistributions of source code must retain the above copyright
   8      notice, this list of conditions and the following disclaimer.
   9
  10      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      The name of Red Hat Incorporated may not be used to endorse
  15      or promote products derived from this software without specific
  16      prior written permission.
  17
  18    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  19    AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  20    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  21    ARE DISCLAIMED.  IN NO EVENT SHALL RED HAT INCORPORATED BE LIABLE FOR ANY
  22    DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  23    (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  24    LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  25    ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  26    (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  27    SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28 */
  29
  30 /*
  31 FUNCTION
  32         <<wctrans>>, <<wctrans_l>>---get wide-character translation type
  33
  34 INDEX
  35         wctrans
  36
  37 INDEX
  38         wctrans_l
  39
  40 SYNOPSIS
  41         #include <wctype.h>
  42         wctrans_t wctrans(const char *<[c]>);
  43
  44         #include <wctype.h>
  45         wctrans_t wctrans_l(const char *<[c]>, locale_t <[locale]>);
  46
  47
  48 DESCRIPTION
  49 <<wctrans>> is a function which takes a string <[c]> and gives back
  50 the appropriate wctrans_t type value associated with the string,
  51 if one exists.  The following values are guaranteed to be recognized:
  52 "tolower" and "toupper".
  53
  54 <<wctrans_l>> is like <<wctrans>> but performs the function based on the
  55 locale specified by the locale object locale.  If <[locale]> is
  56 LC_GLOBAL_LOCALE or not a valid locale object, the behaviour is undefined.
  57
  58 RETURNS
  59 <<wctrans>>, <<wctrans_l>> return 0 and sets <<errno>> to <<EINVAL>> if the
  60 given name is invalid.  Otherwise, it returns a valid non-zero wctrans_t
  61 value.
  62
  63 PORTABILITY
  64 <<wctrans>> is C99.
  65 <<wctrans_l>> is POSIX-1.2008.
  66
  67 No supporting OS subroutines are required.
  68 */
  69
  70 #include <_ansi.h>
  71 #include <string.h>
  72 #include <reent.h>
  73 #include <wctype.h>
  74 #include <errno.h>
  75 #include "local.h"
  76
  77 wctrans_t
  78 _wctrans_r (struct _reent *r,
  79         const char *c)
  80 {
  81   if (!strcmp (c, "tolower"))
  82     return WCT_TOLOWER;
  83   else if (!strcmp (c, "toupper"))
  84     return WCT_TOUPPER;
  85   else
  86     {
  87       _REENT_ERRNO(r) = EINVAL;
  88       return 0;
  89     }
  90 }
  91
  92 #ifndef _REENT_ONLY
  93 wctrans_t
  94 wctrans (const char *c)
  95 {
  96   return _wctrans_r (_REENT, c);
  97 }
  98 #endif /* !_REENT_ONLY */