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  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.         <<towctrans>>---extensible wide-character translation
  33.  
  34. INDEX
  35.         towctrans
  36.  
  37. ANSI_SYNOPSIS
  38.         #include <wctype.h>
  39.         wint_t towctrans(wint_t <[c]>, wctrans_t <[w]>);
  40.  
  41. TRAD_SYNOPSIS
  42.         #include <wctype.h>
  43.         wint_t towctrans(<[c]>, <[w]>)
  44.         wint_t <[c]>;
  45.         wctrans_t <[w]>;
  46.  
  47.  
  48. DESCRIPTION
  49. <<towctrans>> is a function which converts wide characters based on
  50. a specified translation type <[w]>.  If the translation type is
  51. invalid or cannot be applied to the current character, no change
  52. to the character is made.
  53.  
  54. RETURNS
  55. <<towctrans>> returns the translated equivalent of <[c]> when it is a
  56. valid for the given translation, otherwise, it returns the input character.
  57. When the translation type is invalid, <<errno>> is set <<EINVAL>>.
  58.  
  59. PORTABILITY
  60. <<towctrans>> is C99.
  61.  
  62. No supporting OS subroutines are required.
  63. */
  64.  
  65. #include <_ansi.h>
  66. #include <string.h>
  67. #include <reent.h>
  68. #include <wctype.h>
  69. #include <errno.h>
  70. #include "local.h"
  71.  
  72. wint_t
  73. _DEFUN (_towctrans_r, (r, c, w),
  74.         struct _reent *r _AND
  75.         wint_t c _AND
  76.         wctrans_t w)
  77. {
  78.   if (w == WCT_TOLOWER)
  79.     return towlower (c);
  80.   else if (w == WCT_TOUPPER)
  81.     return towupper (c);
  82.   else
  83.     {
  84.       r->_errno = EINVAL;
  85.       return c;
  86.     }
  87. }
  88.  
  89. #ifndef _REENT_ONLY
  90. wint_t
  91. _DEFUN (towctrans, (c, w),
  92.         wint_t c _AND
  93.         wctrans_t w)
  94. {
  95.   return _towctrans_r (_REENT, c, w);
  96. }
  97. #endif /* !_REENT_ONLY */
  98.