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/***********************************************************************
* *
* This software is part of the ast package *
* Copyright (c) 1982-2010 AT&T Intellectual Property *
* and is licensed under the *
* Common Public License, Version 1.0 *
* by AT&T Intellectual Property *
* *
* A copy of the License is available at *
* http://www.opensource.org/licenses/cpl1.0.txt *
* (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) *
* *
* Information and Software Systems Research *
* AT&T Research *
* Florham Park NJ *
* *
* David Korn <dgk@research.att.com> *
* *
***********************************************************************/
#pragma prototyped
#ifndef _SHNODES_H
#define _SHNODES_H 1
/*
* UNIX shell
* Written by David Korn
*
*/
#include <ast.h>
#include "argnod.h"
/* command tree for tretyp */
#define FINT (02<<COMBITS) /* non-interruptable */
#define FAMP (04<<COMBITS) /* background */
#define FPIN (010<<COMBITS) /* input is a pipe */
#define FPOU (040<<COMBITS) /* output is a pipe */
#define FPCL (0100<<COMBITS) /* close the pipe */
#define FCOOP (0200<<COMBITS) /* cooperating process */
#define FSHOWME (0400<<COMBITS) /* set for showme commands */
#define FPOSIX (02<<COMBITS) /* posix semantics function */
#define FLINENO (04<<COMBITS) /* for/case has line number */
#define FOPTGET (010<<COMBITS) /* function calls getopts */
#define TNEGATE (01<<COMBITS) /* ! inside [[...]] */
#define TBINARY (02<<COMBITS) /* binary operator in [[...]] */
#define TUNARY (04<<COMBITS) /* unary operator in [[...]] */
#define TTEST (010<<COMBITS)
#define TPAREN (TBINARY|TUNARY)
#define TSHIFT (COMBITS+4)
#define TNSPACE (TFUN|COMSCAN)
#define TCOM 0
#define TPAR 1
#define TFIL 2
#define TLST 3
#define TIF 4
#define TWH 5
#define TUN (TWH|COMSCAN)
#define TTST 6
#define TSW 7
#define TAND 8
#define TORF 9
#define TFORK 10
#define TFOR 11
#define TSELECT (TFOR|COMSCAN)
#define TARITH 12
#define TTIME 13
#define TSETIO 14
#define TFUN 15
/* this node is a proforma for those that follow */
struct trenod
{
int tretyp;
struct ionod *treio;
};
struct forknod
{
int forktyp;
struct ionod *forkio;
Shnode_t *forktre;
int forkline;
};
struct ifnod
{
int iftyp;
Shnode_t *iftre;
Shnode_t *thtre;
Shnode_t *eltre;
};
struct whnod
{
int whtyp;
Shnode_t *whtre;
Shnode_t *dotre;
struct arithnod *whinc;
};
struct fornod
{
int fortyp;
char *fornam;
Shnode_t *fortre;
struct comnod *forlst;
int forline;
};
struct swnod
{
int swtyp;
struct argnod *swarg;
struct regnod *swlst;
struct ionod *swio;
int swline;
};
struct regnod
{
struct argnod *regptr;
Shnode_t *regcom;
struct regnod *regnxt;
char regflag;
};
struct parnod
{
int partyp;
Shnode_t *partre;
};
struct lstnod
{
int lsttyp;
Shnode_t *lstlef;
Shnode_t *lstrit;
};
/* tst is same as lst, but with extra field for line number */
struct tstnod
{
struct lstnod tstlst;
int tstline;
};
struct functnod
{
int functtyp;
char *functnam;
Shnode_t *functtre;
int functline;
off_t functloc;
struct slnod *functstak;
struct comnod *functargs;
};
struct arithnod
{
int artyp;
int arline;
struct argnod *arexpr;
void *arcomp;
};
/* types of ionodes stored in iofile */
#define IOUFD 0x3f /* file descriptor number mask */
#define IOPUT 0x40 /* > redirection operator */
#define IOAPP 0x80 /* >> redirection operator */
#define IODOC 0x100 /* << redirection operator */
#define IOMOV 0x200 /* <& or >& operators */
#define IOCLOB 0x400 /* noclobber bit */
#define IORDW 0x800 /* <> redirection operator */
#define IORAW 0x1000 /* no expansion needed for filename */
#define IOSTRG 0x2000 /* here-document stored as incore string */
#define IOSTRIP 0x4000 /* strip leading tabs for here-document */
#define IOQUOTE 0x8000 /* here-document delimiter was quoted */
#define IOVNM 0x10000 /* iovname field is non-zero */
#define IOLSEEK 0x20000 /* seek operators <# or ># */
#define IOARITH 0x40000 /* arithmetic seek <# ((expr)) */
#define IOREWRITE 0x80000 /* arithmetic seek <# ((expr)) */
#define IOCOPY IOCLOB /* copy skipped lines onto standard output */
#define IOPROCSUB IOARITH /* process substitution redirection */
union Shnode_u
{
struct argnod arg;
struct ionod io;
struct whnod wh;
struct swnod sw;
struct ifnod if_;
struct dolnod dol;
struct comnod com;
struct trenod tre;
struct forknod fork;
struct fornod for_;
struct regnod reg;
struct parnod par;
struct lstnod lst;
struct tstnod tst;
struct functnod funct;
struct arithnod ar;
};
extern void sh_freeup(Shell_t*);
extern void sh_funstaks(struct slnod*,int);
extern Sfio_t *sh_subshell(Shnode_t*, int, int);
#if defined(__EXPORT__) && defined(_BLD_DLL) && defined(_BLD_shell)
__EXPORT__
#endif
extern int sh_tdump(Sfio_t*, const Shnode_t*);
extern Shnode_t *sh_trestore(Shell_t*, Sfio_t*);
#endif /* _SHNODES_H */
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