xref: /freebsd/bin/sh/parser.h (revision 4b88c807ea9c629dc5691abc7e3cac9ea0d776dd)
14b88c807SRodney W. Grimes /*-
24b88c807SRodney W. Grimes  * Copyright (c) 1991, 1993
34b88c807SRodney W. Grimes  *	The Regents of the University of California.  All rights reserved.
44b88c807SRodney W. Grimes  *
54b88c807SRodney W. Grimes  * This code is derived from software contributed to Berkeley by
64b88c807SRodney W. Grimes  * Kenneth Almquist.
74b88c807SRodney W. Grimes  *
84b88c807SRodney W. Grimes  * Redistribution and use in source and binary forms, with or without
94b88c807SRodney W. Grimes  * modification, are permitted provided that the following conditions
104b88c807SRodney W. Grimes  * are met:
114b88c807SRodney W. Grimes  * 1. Redistributions of source code must retain the above copyright
124b88c807SRodney W. Grimes  *    notice, this list of conditions and the following disclaimer.
134b88c807SRodney W. Grimes  * 2. Redistributions in binary form must reproduce the above copyright
144b88c807SRodney W. Grimes  *    notice, this list of conditions and the following disclaimer in the
154b88c807SRodney W. Grimes  *    documentation and/or other materials provided with the distribution.
164b88c807SRodney W. Grimes  * 3. All advertising materials mentioning features or use of this software
174b88c807SRodney W. Grimes  *    must display the following acknowledgement:
184b88c807SRodney W. Grimes  *	This product includes software developed by the University of
194b88c807SRodney W. Grimes  *	California, Berkeley and its contributors.
204b88c807SRodney W. Grimes  * 4. Neither the name of the University nor the names of its contributors
214b88c807SRodney W. Grimes  *    may be used to endorse or promote products derived from this software
224b88c807SRodney W. Grimes  *    without specific prior written permission.
234b88c807SRodney W. Grimes  *
244b88c807SRodney W. Grimes  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
254b88c807SRodney W. Grimes  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
264b88c807SRodney W. Grimes  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
274b88c807SRodney W. Grimes  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
284b88c807SRodney W. Grimes  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
294b88c807SRodney W. Grimes  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
304b88c807SRodney W. Grimes  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
314b88c807SRodney W. Grimes  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
324b88c807SRodney W. Grimes  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
334b88c807SRodney W. Grimes  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
344b88c807SRodney W. Grimes  * SUCH DAMAGE.
354b88c807SRodney W. Grimes  *
364b88c807SRodney W. Grimes  *	@(#)parser.h	8.1 (Berkeley) 5/31/93
374b88c807SRodney W. Grimes  */
384b88c807SRodney W. Grimes 
394b88c807SRodney W. Grimes /* control characters in argument strings */
404b88c807SRodney W. Grimes #define CTLESC '\201'
414b88c807SRodney W. Grimes #define CTLVAR '\202'
424b88c807SRodney W. Grimes #define CTLENDVAR '\203'
434b88c807SRodney W. Grimes #define CTLBACKQ '\204'
444b88c807SRodney W. Grimes #define CTLQUOTE 01		/* ored with CTLBACKQ code if in quotes */
454b88c807SRodney W. Grimes /*	CTLBACKQ | CTLQUOTE == '\205' */
464b88c807SRodney W. Grimes #define	CTLARI	'\206'
474b88c807SRodney W. Grimes #define	CTLENDARI '\207'
484b88c807SRodney W. Grimes 
494b88c807SRodney W. Grimes /* variable substitution byte (follows CTLVAR) */
504b88c807SRodney W. Grimes #define VSTYPE 07		/* type of variable substitution */
514b88c807SRodney W. Grimes #define VSNUL 040		/* colon--treat the empty string as unset */
524b88c807SRodney W. Grimes #define VSQUOTE 0100		/* inside double quotes--suppress splitting */
534b88c807SRodney W. Grimes 
544b88c807SRodney W. Grimes /* values of VSTYPE field */
554b88c807SRodney W. Grimes #define VSNORMAL 1		/* normal variable:  $var or ${var} */
564b88c807SRodney W. Grimes #define VSMINUS 2		/* ${var-text} */
574b88c807SRodney W. Grimes #define VSPLUS 3		/* ${var+text} */
584b88c807SRodney W. Grimes #define VSQUESTION 4		/* ${var?message} */
594b88c807SRodney W. Grimes #define VSASSIGN 5		/* ${var=text} */
604b88c807SRodney W. Grimes 
614b88c807SRodney W. Grimes 
624b88c807SRodney W. Grimes /*
634b88c807SRodney W. Grimes  * NEOF is returned by parsecmd when it encounters an end of file.  It
644b88c807SRodney W. Grimes  * must be distinct from NULL, so we use the address of a variable that
654b88c807SRodney W. Grimes  * happens to be handy.
664b88c807SRodney W. Grimes  */
674b88c807SRodney W. Grimes extern int tokpushback;
684b88c807SRodney W. Grimes #define NEOF ((union node *)&tokpushback)
694b88c807SRodney W. Grimes extern int whichprompt;		/* 1 == PS1, 2 == PS2 */
704b88c807SRodney W. Grimes 
714b88c807SRodney W. Grimes 
724b88c807SRodney W. Grimes #ifdef __STDC__
734b88c807SRodney W. Grimes union node *parsecmd(int);
744b88c807SRodney W. Grimes int goodname(char *);
754b88c807SRodney W. Grimes char *getprompt(void *);
764b88c807SRodney W. Grimes #else
774b88c807SRodney W. Grimes union node *parsecmd();
784b88c807SRodney W. Grimes int goodname();
794b88c807SRodney W. Grimes char *getprompt();
804b88c807SRodney W. Grimes #endif
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