isctype.c

Algorithms for Image Processing and Computer Vision Source Code

/* This is file ISCTYPE.C */
/* This file may have been modified by DJ Delorie (Jan 1991).  If so,
** these modifications are Coyright (C) 1993 DJ Delorie, 24 Kirsten Ave,
** Rochester NH, 03867-2954, USA.
*/

/*
 * Copyright (c) 1989 The Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that: (1) source distributions retain this entire copyright
 * notice and comment, and (2) distributions including binaries display
 * the following acknowledgement:  ``This product includes software
 * developed by the University of California, Berkeley and its contributors''
 * in the documentation or other materials provided with the distribution
 * and in all advertising materials mentioning features or use of this
 * software. Neither the name of the University nor the names of its
 * contributors may be used to endorse or promote products derived
 * from this software without specific prior written permission.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */

#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)isctype.c	5.2 (Berkeley) 6/1/90";
#endif /* LIBC_SCCS and not lint */

#define _ANSI_LIBRARY
#include <ctype.h>

#undef isalnum
int isalnum(c)
	int c;
{
	return((_ctype_ + 1)[c] & (_U|_L|_N));
}

#undef isalpha
int isalpha(c)
	int c;
{
	return((_ctype_ + 1)[c] & (_U|_L));
}

#undef iscntrl
int iscntrl(c)
	int c;
{
	return((_ctype_ + 1)[c] & _C);
}

#undef isdigit
int isdigit(c)
	int c;
{
	return((_ctype_ + 1)[c] & _N);
}

#undef isgraph
int isgraph(c)
	int c;
{
	return((_ctype_ + 1)[c] & (_P|_U|_L|_N));
}

#undef islower
int islower(c)
	int c;
{
	return((_ctype_ + 1)[c] & _L);
}

#undef isprint
int isprint(c)
	int c;
{
	return((_ctype_ + 1)[c] & (_P|_U|_L|_N|_B));
}

#undef ispunct
int ispunct(c)
	int c;
{
	return((_ctype_ + 1)[c] & _P);
}

#undef isspace
int isspace(c)
	int c;
{
	return((_ctype_ + 1)[c] & _S);
}

#undef isupper
int isupper(c)
	int c;
{
	return((_ctype_ + 1)[c] & _U);
}

#undef isxdigit
int isxdigit(c)
	int c;
{
	return((_ctype_ + 1)[c] & (_N|_X));
}

#undef tolower
int tolower(c)
	int c;
{
  if ((c >= 'A') && (c <= 'Z'))
	return((c) - 'A' + 'a');
  else
    return c;
}

#undef toupper
int toupper(c)
	int c;
{
  if ((c >= 'a') && (c <= 'z'))
	return((c) - 'a' + 'A');
  else
    return c;
}