bin/sh/syntax.h

   1 /*      $NetBSD: syntax.h,v 1.2 2004/01/17 17:38:12 dsl Exp $   */
   2
   3 /*-
   4  * Copyright (c) 1991, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * This code is derived from software contributed to Berkeley by
   8  * Kenneth Almquist.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  * 3. Neither the name of the University nor the names of its contributors
  19  *    may be used to endorse or promote products derived from this software
  20  *    without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  */
  34
  35 #include <sys/cdefs.h>
  36 #include <ctype.h>
  37
  38 /* Syntax classes */
  39 #define CWORD 0                 /* character is nothing special */
  40 #define CNL 1                   /* newline character */
  41 #define CBACK 2                 /* a backslash character */
  42 #define CSQUOTE 3               /* single quote */
  43 #define CDQUOTE 4               /* double quote */
  44 #define CBQUOTE 5               /* backwards single quote */
  45 #define CVAR 6                  /* a dollar sign */
  46 #define CENDVAR 7               /* a '}' character */
  47 #define CLP 8                   /* a left paren in arithmetic */
  48 #define CRP 9                   /* a right paren in arithmetic */
  49 #define CEOF 10                 /* end of file */
  50 #define CCTL 11                 /* like CWORD, except it must be escaped */
  51 #define CSPCL 12                /* these terminate a word */
  52
  53 /* Syntax classes for is_ functions */
  54 #define ISDIGIT 01              /* a digit */
  55 #define ISUPPER 02              /* an upper case letter */
  56 #define ISLOWER 04              /* a lower case letter */
  57 #define ISUNDER 010             /* an underscore */
  58 #define ISSPECL 020             /* the name of a special parameter */
  59
  60 #define PEOF (CHAR_MIN - 1)
  61 #define SYNBASE (-PEOF)
  62 /* XXX UPEOF is CHAR_MAX, so is a valid 'char' value... */
  63 #define UPEOF ((char)PEOF)
  64
  65
  66 #define BASESYNTAX (basesyntax + SYNBASE)
  67 #define DQSYNTAX (dqsyntax + SYNBASE)
  68 #define SQSYNTAX (sqsyntax + SYNBASE)
  69 #define ARISYNTAX (arisyntax + SYNBASE)
  70
  71 /* These defines assume that the digits are contiguous */
  72 #define is_digit(c)     ((unsigned)((c) - '0') <= 9)
  73 #define is_alpha(c)     (((char)(c)) != UPEOF && ((c) < CTL_FIRST || (c) > CTL_LAST) && isalpha((unsigned char)(c)))
  74 #define is_name(c)      (((char)(c)) != UPEOF && ((c) < CTL_FIRST || (c) > CTL_LAST) && ((c) == '_' || isalpha((unsigned char)(c))))
  75 #define is_in_name(c)   (((char)(c)) != UPEOF && ((c) < CTL_FIRST || (c) > CTL_LAST) && ((c) == '_' || isalnum((unsigned char)(c))))
  76 #define is_special(c)   ((is_type+SYNBASE)[c] & (ISSPECL|ISDIGIT))
  77 #define digit_val(c)    ((c) - '0')
  78
  79 extern const char basesyntax[];
  80 extern const char dqsyntax[];
  81 extern const char sqsyntax[];
  82 extern const char arisyntax[];
  83 extern const char is_type[];