text: /* $Id$ */
  /* Copyright (c) 2004-2017 Pierre Pronchery <khorben@defora.org> */
  /* This file is part of DeforaOS System libc */
  /* All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions are
   * met:
   *
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   *
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
   * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
   * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
   * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
   * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
   * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
   * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
   * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
   * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */
  
  
  
  #include "ctype.h"
  #undef isalnum
  #undef isalpha
  #undef ispunct
  
  
  /* functions */
  /* isalnum */
  int isalnum(int c)
  {
  	return isalpha(c) || isdigit(c);
  }
  
  
  /* isalpha */
  int isalpha(int c)
  {
  	return islower(c) || isupper(c);
  }
  
  
  /* isascii */
  int isascii(int c)
  {
  	return c >= 0 && c <= 127;
  }
  
  
  /* isblank */
  int isblank(int c)
  {
  	return c == ' ' || c == '\t';
  }
  
  
  /* iscntrl */
  int iscntrl(int c)
  {
  	/* FIXME implement */
  	return 0;
  }
  
  
  /* isdigit */
  int isdigit(int c)
  {
  	return c >= '0' && c <= '9';
  }
  
  
  /* isgraph */
  int isgraph(int c)
  {
  	return c > ' ' && c <= '~';
  }
  
  
  /* islower */
  int islower(int c)
  {
  	return c >= 'a' && c <= 'z';
  }
  
  
  /* isprint */
  int isprint(int c)
  {
  	return c >= ' ' && c <= '~';
  }
  
  
  /* ispunct */
  int ispunct(int c)
  {
  	return isprint(c) && (!(isspace(c) || isalnum(c)));
  }
  
  
  /* isspace */
  int isspace(int c)
  {
  	return c == ' ' || (c >= '\t' && c <= '\r');
  }
  
  
  /* isupper */
  int isupper(int c)
  {
  	return c >= 'A' && c <= 'Z';
  }
  
  
  /* isxdigit */
  int isxdigit(int c)
  {
  	return (c >= '0' && c <= '9') || (c >= 'a' && c <= 'f')
  		|| (c >= 'A' && c <= 'F');
  }
  
  
  /* toascii */
  int toascii(int c)
  {
  	return c & 0x7f;
  }
  
  
  /* tolower */
  int tolower(int c)
  {
  	if(isupper(c))
  		return c + 'a' - 'A';
  	return c;
  }
  
  
  /* toupper */
  int toupper(int c)
  {
  	if(islower(c))
  		return c + 'A' - 'a';
  	return c;
  }
  