source: kBuild/trunk/src/ash/syntax.h@ 626

/*      $NetBSD: syntax.h,v 1.2 2004/01/17 17:38:12 dsl Exp $   */

/*-
 * Copyright (c) 1991, 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Kenneth Almquist.
 *
 * 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.
 * 3. 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 BY THE REGENTS 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 REGENTS 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 <sys/cdefs.h>
#include <ctype.h>

/* Syntax classes */
#define CWORD 0                 /* character is nothing special */
#define CNL 1                   /* newline character */
#define CBACK 2                 /* a backslash character */
#define CSQUOTE 3               /* single quote */
#define CDQUOTE 4               /* double quote */
#define CBQUOTE 5               /* backwards single quote */
#define CVAR 6                  /* a dollar sign */
#define CENDVAR 7               /* a '}' character */
#define CLP 8                   /* a left paren in arithmetic */
#define CRP 9                   /* a right paren in arithmetic */
#define CEOF 10                 /* end of file */
#define CCTL 11                 /* like CWORD, except it must be escaped */
#define CSPCL 12                /* these terminate a word */

/* Syntax classes for is_ functions */
#define ISDIGIT 01              /* a digit */
#define ISUPPER 02              /* an upper case letter */
#define ISLOWER 04              /* a lower case letter */
#define ISUNDER 010             /* an underscore */
#define ISSPECL 020             /* the name of a special parameter */

#define PEOF (CHAR_MIN - 1)
#define SYNBASE (-PEOF)
/* XXX UPEOF is CHAR_MAX, so is a valid 'char' value... */
#define UPEOF ((char)PEOF)


#define BASESYNTAX (basesyntax + SYNBASE)
#define DQSYNTAX (dqsyntax + SYNBASE)
#define SQSYNTAX (sqsyntax + SYNBASE)
#define ARISYNTAX (arisyntax + SYNBASE)

/* These defines assume that the digits are contiguous */
#define is_digit(c)     ((unsigned)((c) - '0') <= 9)
#define is_alpha(c)     (((char)(c)) != UPEOF && ((c) < CTL_FIRST || (c) > CTL_LAST) && isalpha((unsigned char)(c)))
#define is_name(c)      (((char)(c)) != UPEOF && ((c) < CTL_FIRST || (c) > CTL_LAST) && ((c) == '_' || isalpha((unsigned char)(c))))
#define is_in_name(c)   (((char)(c)) != UPEOF && ((c) < CTL_FIRST || (c) > CTL_LAST) && ((c) == '_' || isalnum((unsigned char)(c))))
#define is_special(c)   ((is_type+SYNBASE)[c] & (ISSPECL|ISDIGIT))
#define digit_val(c)    ((c) - '0')

extern const char basesyntax[];
extern const char dqsyntax[];
extern const char sqsyntax[];
extern const char arisyntax[];
extern const char is_type[];