usr/dash/parser.h

/*-
 * Copyright (c) 1991, 1993
 *	The Regents of the University of California.  All rights reserved.
 * Copyright (c) 1997-2005
 *	Herbert Xu <herbert@gondor.apana.org.au>.  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.
 *
 *	@(#)parser.h	8.3 (Berkeley) 5/4/95
 */

/* control characters in argument strings */
#define CTL_FIRST -127		/* first 'special' character */
#define CTLESC -127		/* escape next character */
#define CTLVAR -126		/* variable defn */
#define CTLENDVAR -125
#define CTLBACKQ -124
#define	CTLARI -122		/* arithmetic expression */
#define	CTLENDARI -121
#define	CTLQUOTEMARK -120
#define	CTL_LAST -120		/* last 'special' character */

/* variable substitution byte (follows CTLVAR) */
#define VSTYPE	0x0f		/* type of variable substitution */
#define VSNUL	0x10		/* colon--treat the empty string as unset */

/* values of VSTYPE field */
#define VSNORMAL	0x1		/* normal variable:  $var or ${var} */
#define VSMINUS		0x2		/* ${var-text} */
#define VSPLUS		0x3		/* ${var+text} */
#define VSQUESTION	0x4		/* ${var?message} */
#define VSASSIGN	0x5		/* ${var=text} */
#define VSTRIMRIGHT	0x6		/* ${var%pattern} */
#define VSTRIMRIGHTMAX 	0x7		/* ${var%%pattern} */
#define VSTRIMLEFT	0x8		/* ${var#pattern} */
#define VSTRIMLEFTMAX	0x9		/* ${var##pattern} */
#define VSLENGTH	0xa		/* ${#var} */

/* values of checkkwd variable */
#define CHKALIAS	0x1
#define CHKKWD		0x2
#define CHKNL		0x4
#define CHKEOFMARK	0x8


/*
 * NEOF is returned by parsecmd when it encounters an end of file.  It
 * must be distinct from NULL, so we use the address of a variable that
 * happens to be handy.
 */
extern int tokpushback;
#define NEOF ((union node *)&tokpushback)
extern int whichprompt;		/* 1 == PS1, 2 == PS2 */
extern int checkkwd;
extern int startlinno;		/* line # where last token started */


union node *parsecmd(int);
void fixredir(union node *, const char *, int);
const char *getprompt(void *);
const char *const *findkwd(const char *);
char *endofname(const char *);
const char *expandstr(const char *);

static inline int
goodname(const char *p)
{
	return !*endofname(p);
}
1	/*-
2	* Copyright (c) 1991, 1993
3	* The Regents of the University of California. All rights reserved.
4	* Copyright (c) 1997-2005
5	* Herbert Xu <herbert@gondor.apana.org.au>. 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	* @(#)parser.h 8.3 (Berkeley) 5/4/95
35	*/
36
37	/* control characters in argument strings */
38	#define CTL_FIRST -127 /* first 'special' character */
39	#define CTLESC -127 /* escape next character */
40	#define CTLVAR -126 /* variable defn */
41	#define CTLENDVAR -125
42	#define CTLBACKQ -124
43	#define CTLARI -122 /* arithmetic expression */
44	#define CTLENDARI -121
45	#define CTLQUOTEMARK -120
46	#define CTL_LAST -120 /* last 'special' character */
47
48	/* variable substitution byte (follows CTLVAR) */
49	#define VSTYPE 0x0f /* type of variable substitution */
50	#define VSNUL 0x10 /* colon--treat the empty string as unset */
51
52	/* values of VSTYPE field */
53	#define VSNORMAL 0x1 /* normal variable: $var or ${var} */
54	#define VSMINUS 0x2 /* ${var-text} */
55	#define VSPLUS 0x3 /* ${var+text} */
56	#define VSQUESTION 0x4 /* ${var?message} */
57	#define VSASSIGN 0x5 /* ${var=text} */
58	#define VSTRIMRIGHT 0x6 /* ${var%pattern} */
59	#define VSTRIMRIGHTMAX 0x7 /* ${var%%pattern} */
60	#define VSTRIMLEFT 0x8 /* ${var#pattern} */
61	#define VSTRIMLEFTMAX 0x9 /* ${var##pattern} */
62	#define VSLENGTH 0xa /* ${#var} */
63
64	/* values of checkkwd variable */
65	#define CHKALIAS 0x1
66	#define CHKKWD 0x2
67	#define CHKNL 0x4
68	#define CHKEOFMARK 0x8
69
70
71	/*
72	* NEOF is returned by parsecmd when it encounters an end of file. It
73	* must be distinct from NULL, so we use the address of a variable that
74	* happens to be handy.
75	*/
76	extern int tokpushback;
77	#define NEOF ((union node *)&tokpushback)
78	extern int whichprompt; /* 1 == PS1, 2 == PS2 */
79	extern int checkkwd;
80	extern int startlinno; /* line # where last token started */
81
82
83	union node *parsecmd(int);
84	void fixredir(union node , const char , int);
85	const char getprompt(void );
86	const char const findkwd(const char *);
87	char endofname(const char );
88	const char expandstr(const char );
89
90	static inline int
91	goodname(const char *p)
92	{
93	return !*endofname(p);
94	}