mingw-w64-crt/ctype/wctrans.c

/**
 * This file has no copyright assigned and is placed in the Public Domain.
 * This file is part of the mingw-w64 runtime package.
 * No warranty is given; refer to the file DISCLAIMER.PD within this package.
 */
/*
  wctrans.c
  7.25.3.2 Extensible wide-character case mapping functions

  Contributed by: Danny Smith  <dannysmith@usesr.sourcefoge.net>
  2005-02-24

  This source code is placed in the PUBLIC DOMAIN. It is modified
  from the Q8 package created by Doug Gwyn <gwyn@arl.mil>
 */

#include <stdlib.h>
#include <string.h>
#include <wctype.h>

/*
  These two function go in the same translation unit so that we
  can ensure that

    towctrans(wc, wctrans("tolower")) == towlower(wc)
    towctrans(wc, wctrans("toupper")) == towupper(wc)

  It also ensures that

    towctrans(wc, wctrans("")) == wc

  which is not required by standard.
*/

static const struct {
  const char *name;
  wctrans_t val;
} tmap[] = {
  {"tolower", _LOWER},
  {"toupper", _UPPER}
};

wctrans_t
wctrans (const char* property)
{
  int i;
  for (i = 0; i < (int) _countof (tmap); ++i)
    if (strcmp (property, tmap[i].name) == 0)
      return tmap[i].val;
  return 0;
}

wint_t towctrans (wint_t wc, wctrans_t desc)
{
  switch (desc)
    {
    case _LOWER:
      return towlower (wc);
    case _UPPER:
      return towupper (wc);
    default:
      return wc;
    }
}

wctrans_t (__cdecl *__MINGW_IMP_SYMBOL (wctrans)) (const char *) = wctrans;
wint_t (__cdecl *__MINGW_IMP_SYMBOL (towctrans)) (wint_t, wctrans_t) = towctrans;