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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
/*
* David Korn
* AT&T Labs
*
* shell parse tree dump
*
*/
#include "defs.h"
#include "shnodes.h"
#include "path.h"
#include "io.h"
#include <ccode.h>
static int p_comlist(const struct dolnod*);
static int p_arg(const struct argnod*);
static int p_comarg(const struct comnod*);
static int p_redirect(const struct ionod*);
static int p_switch(const struct regnod*);
static int p_tree(const Shnode_t*);
static int p_string(const char*);
static Sfio_t *outfile;
int sh_tdump(Sfio_t *out, const Shnode_t *t)
{
outfile = out;
return(p_tree(t));
}
/*
* convert to ASCII to write and back again if needed
*/
static int outstring(Sfio_t *out, const char *string, int n)
{
int r;
char *cp = (char*)string;
ccmaps(cp, n, CC_NATIVE, CC_ASCII);
r = sfwrite(out,cp,n);
ccmaps(cp, n, CC_ASCII, CC_NATIVE);
return(r);
}
/*
* print script corresponding to shell tree <t>
*/
static int p_tree(register const Shnode_t *t)
{
if(!t)
return(sfputl(outfile,-1));
if(sfputl(outfile,t->tre.tretyp)<0)
return(-1);
switch(t->tre.tretyp&COMMSK)
{
case TTIME:
case TPAR:
return(p_tree(t->par.partre));
case TCOM:
return(p_comarg((struct comnod*)t));
case TSETIO:
case TFORK:
if(sfputu(outfile,t->fork.forkline)<0)
return(-1);
if(p_tree(t->fork.forktre)<0)
return(-1);
return(p_redirect(t->fork.forkio));
case TIF:
if(p_tree(t->if_.iftre)<0)
return(-1);
if(p_tree(t->if_.thtre)<0)
return(-1);
return(p_tree(t->if_.eltre));
case TWH:
if(t->wh.whinc)
{
if(p_tree((Shnode_t*)(t->wh.whinc))<0)
return(-1);
}
else
{
if(sfputl(outfile,-1)<0)
return(-1);
}
if(p_tree(t->wh.whtre)<0)
return(-1);
return(p_tree(t->wh.dotre));
case TLST:
case TAND:
case TORF:
case TFIL:
if(p_tree(t->lst.lstlef)<0)
return(-1);
return(p_tree(t->lst.lstrit));
case TARITH:
if(sfputu(outfile,t->ar.arline)<0)
return(-1);
return(p_arg(t->ar.arexpr));
case TFOR:
if(sfputu(outfile,t->for_.forline)<0)
return(-1);
if(p_tree(t->for_.fortre)<0)
return(-1);
if(p_string(t->for_.fornam)<0)
return(-1);
return(p_tree((Shnode_t*)t->for_.forlst));
case TSW:
if(sfputu(outfile,t->sw.swline)<0)
return(-1);
if(p_arg(t->sw.swarg)<0)
return(-1);
return(p_switch(t->sw.swlst));
case TFUN:
if(sfputu(outfile,t->funct.functline)<0)
return(-1);
if(p_string(t->funct.functnam)<0)
return(-1);
if(p_tree(t->funct.functtre)<0)
return(-1);
return(p_tree((Shnode_t*)t->funct.functargs));
case TTST:
if(sfputu(outfile,t->tst.tstline)<0)
return(-1);
if((t->tre.tretyp&TPAREN)==TPAREN)
return(p_tree(t->lst.lstlef));
else
{
if(p_arg(&(t->lst.lstlef->arg))<0)
return(-1);
if((t->tre.tretyp&TBINARY))
return(p_arg(&(t->lst.lstrit->arg)));
return(0);
}
}
return(-1);
}
static int p_arg(register const struct argnod *arg)
{
register int n;
struct fornod *fp;
while(arg)
{
if((n = strlen(arg->argval)) || (arg->argflag&~(ARG_APPEND|ARG_MESSAGE|ARG_QUOTED)))
fp=0;
else
{
fp=(struct fornod*)arg->argchn.ap;
n = strlen(fp->fornam)+1;
}
sfputu(outfile,n+1);
if(fp)
{
sfputc(outfile,0);
outstring(outfile,fp->fornam,n-1);
}
else
outstring(outfile,arg->argval,n);
sfputc(outfile,arg->argflag);
if(fp)
{
sfputu(outfile,fp->fortyp);
p_tree(fp->fortre);
}
arg = arg->argnxt.ap;
}
return(sfputu(outfile,0));
}
static int p_redirect(register const struct ionod *iop)
{
while(iop)
{
if(iop->iovname)
sfputl(outfile,iop->iofile|IOVNM);
else
sfputl(outfile,iop->iofile);
p_string(iop->ioname);
if(iop->iodelim)
{
p_string(iop->iodelim);
sfputl(outfile,iop->iosize);
sfseek(sh.heredocs,iop->iooffset,SEEK_SET);
sfmove(sh.heredocs,outfile, iop->iosize,-1);
}
else
sfputu(outfile,0);
if(iop->iovname)
p_string(iop->iovname);
iop = iop->ionxt;
}
return(sfputl(outfile,-1));
}
static int p_comarg(register const struct comnod *com)
{
p_redirect(com->comio);
p_arg(com->comset);
if(!com->comarg)
sfputl(outfile,-1);
else if(com->comtyp&COMSCAN)
p_arg(com->comarg);
else
p_comlist((struct dolnod*)com->comarg);
return(sfputu(outfile,com->comline));
}
static int p_comlist(const struct dolnod *dol)
{
register char *cp, *const*argv;
register int n;
argv = dol->dolval+ARG_SPARE;
while(cp = *argv)
argv++;
n = argv - (dol->dolval+1);
sfputl(outfile,n);
argv = dol->dolval+ARG_SPARE;
while(cp = *argv++)
p_string(cp);
return(sfputu(outfile,0));
}
static int p_switch(register const struct regnod *reg)
{
while(reg)
{
sfputl(outfile,reg->regflag);
p_arg(reg->regptr);
p_tree(reg->regcom);
reg = reg->regnxt;
}
return(sfputl(outfile,-1));
}
static int p_string(register const char *string)
{
register size_t n=strlen(string);
if(sfputu(outfile,n+1)<0)
return(-1);
return(outstring(outfile,string,n));
}
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