newlib/libc/ctype/wctype.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         <<wctype>>, <<wctype_l>>---get wide-character classification type
  33
  34 INDEX
  35         wctype
  36
  37 INDEX
  38         wctype_l
  39
  40 SYNOPSIS
  41         #include <wctype.h>
  42         wctype_t wctype(const char *<[c]>);
  43
  44         #include <wctype.h>
  45         wctype_t wctype_l(const char *<[c]>, locale_t <[locale]>);
  46
  47
  48 DESCRIPTION
  49 <<wctype>> is a function which takes a string <[c]> and gives back
  50 the appropriate wctype_t type value associated with the string,
  51 if one exists.  The following values are guaranteed to be recognized:
  52 "alnum", "alpha", "blank", "cntrl", "digit", "graph", "lower", "print",
  53 "punct", "space", "upper", and "xdigit".
  54
  55 <<wctype_l>> is like <<wctype>> but performs the function based on the
  56 locale specified by the locale object locale.  If <[locale]> is
  57 LC_GLOBAL_LOCALE or not a valid locale object, the behaviour is undefined.
  58
  59 RETURNS
  60 <<wctype>>, <<wctype_l>> return 0 and sets <<errno>> to <<EINVAL>> if the
  61 given name is invalid.  Otherwise, it returns a valid non-zero wctype_t
  62 value.
  63
  64 PORTABILITY
  65 <<wctype>> is C99.
  66 <<wctype_l>> is POSIX-1.2008.
  67
  68 No supporting OS subroutines are required.
  69 */
  70
  71 #include <_ansi.h>
  72 #include <string.h>
  73 #include <reent.h>
  74 #include <wctype.h>
  75 #include <errno.h>
  76 #include "local.h"
  77
  78 wctype_t
  79 _wctype_r (struct _reent *r,
  80         const char *c)
  81 {
  82   switch (*c)
  83     {
  84     case 'a':
  85       if (!strcmp (c, "alnum"))
  86         return WC_ALNUM;
  87       else if (!strcmp (c, "alpha"))
  88         return WC_ALPHA;
  89       break;
  90     case 'b':
  91       if (!strcmp (c, "blank"))
  92         return WC_BLANK;
  93       break;
  94     case 'c':
  95       if (!strcmp (c, "cntrl"))
  96         return WC_CNTRL;
  97       break;
  98     case 'd':
  99       if (!strcmp (c, "digit"))
 100         return WC_DIGIT;
 101       break;
 102     case 'g':
 103       if (!strcmp (c, "graph"))
 104         return WC_GRAPH;
 105       break;
 106     case 'l':
 107       if (!strcmp (c, "lower"))
 108         return WC_LOWER;
 109       break;
 110     case 'p':
 111       if (!strcmp (c, "print"))
 112         return WC_PRINT;
 113       else if (!strcmp (c, "punct"))
 114         return WC_PUNCT;
 115       break;
 116     case 's':
 117       if (!strcmp (c, "space"))
 118         return WC_SPACE;
 119       break;
 120     case 'u':
 121       if (!strcmp (c, "upper"))
 122         return WC_UPPER;
 123       break;
 124     case 'x':
 125       if (!strcmp (c, "xdigit"))
 126         return WC_XDIGIT;
 127       break;
 128     }
 129
 130   /* otherwise invalid */
 131   _REENT_ERRNO(r) = EINVAL;
 132   return 0;
 133 }
 134
 135 #ifndef _REENT_ONLY
 136 wctype_t
 137 wctype (const char *c)
 138 {
 139   return _wctype_r (_REENT, c);
 140 }
 141 #endif /* !_REENT_ONLY */