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/* $NetBSD: syntax.h,v 1.11 2018/12/03 06:40:26 kre 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 CSPCL 11 /* these terminate a word */
#define CCTL 12 /* like CWORD, except it must be escaped */
#define CSBACK 13 /* a backslash in a single quote syntax */
#define CFAKE 14 /* a delimiter that does not exist */
/*
* note CSBACK == (CCTL|1)
* the code does not rely upon that, but keeping it allows a
* smart enough compiler to optimise some tests
*/
/* 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 ISSPACE 040 /* a white space character */
#define PEOF (CHAR_MIN - 1)
#define PFAKE (CHAR_MIN - 2)
#define SYNBASE (-PFAKE)
#define BASESYNTAX (basesyntax + SYNBASE)
#define DQSYNTAX (dqsyntax + SYNBASE)
#define SQSYNTAX (sqsyntax + SYNBASE)
#define ARISYNTAX (arisyntax + SYNBASE)
/* These defines assume that the digits are contiguous (which is guaranteed) */
#define is_digit(c) ((unsigned)((c) - '0') <= 9)
#define sh_ctype(c) (is_type+SYNBASE)[(int)(c)]
#define is_upper(c) (sh_ctype(c) & ISUPPER)
#define is_lower(c) (sh_ctype(c) & ISLOWER)
#define is_alpha(c) (sh_ctype(c) & (ISUPPER|ISLOWER))
#define is_name(c) (sh_ctype(c) & (ISUPPER|ISLOWER|ISUNDER))
#define is_in_name(c) (sh_ctype(c) & (ISUPPER|ISLOWER|ISUNDER|ISDIGIT))
#define is_special(c) (sh_ctype(c) & (ISSPECL|ISDIGIT))
#define is_space(c) (sh_ctype(c) & ISSPACE)
#define digit_val(c) ((c) - '0')
/* true if the arg char needs CTLESC to protect it */
#define NEEDESC(c) (SQSYNTAX[(int)(c)] == CCTL || \
SQSYNTAX[(int)(c)] == CSBACK)
extern const char basesyntax[];
extern const char dqsyntax[];
extern const char sqsyntax[];
extern const char arisyntax[];
extern const char is_type[];
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