/*
* This file was generated by mknodes.sh
*/
/* $NetBSD: nodes.c.pat,v 1.12 2004/06/15 22:57:27 dsl Exp $ */
/*-
* Copyright (c) 1991, 1993
* The Regents of the University of California. 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.
*
* @(#)nodes.c.pat 8.2 (Berkeley) 5/4/95
*/
#include <stdlib.h>
/*
* Routine for dealing with parsed shell commands.
*/
#include "shell.h"
#include "nodes.h"
#include "memalloc.h"
#include "machdep.h"
#include "mystring.h"
int funcblocksize; /* size of structures in function */
int funcstringsize; /* size of strings in node */
pointer funcblock; /* block to allocate function from */
char *funcstring; /* block to allocate strings from */
static const short nodesize[26] = {
SHELL_ALIGN(sizeof (struct nbinary)),
SHELL_ALIGN(sizeof (struct ncmd)),
SHELL_ALIGN(sizeof (struct npipe)),
SHELL_ALIGN(sizeof (struct nredir)),
SHELL_ALIGN(sizeof (struct nredir)),
SHELL_ALIGN(sizeof (struct nredir)),
SHELL_ALIGN(sizeof (struct nbinary)),
SHELL_ALIGN(sizeof (struct nbinary)),
SHELL_ALIGN(sizeof (struct nif)),
SHELL_ALIGN(sizeof (struct nbinary)),
SHELL_ALIGN(sizeof (struct nbinary)),
SHELL_ALIGN(sizeof (struct nfor)),
SHELL_ALIGN(sizeof (struct ncase)),
SHELL_ALIGN(sizeof (struct nclist)),
SHELL_ALIGN(sizeof (struct narg)),
SHELL_ALIGN(sizeof (struct narg)),
SHELL_ALIGN(sizeof (struct nfile)),
SHELL_ALIGN(sizeof (struct nfile)),
SHELL_ALIGN(sizeof (struct nfile)),
SHELL_ALIGN(sizeof (struct nfile)),
SHELL_ALIGN(sizeof (struct nfile)),
SHELL_ALIGN(sizeof (struct ndup)),
SHELL_ALIGN(sizeof (struct ndup)),
SHELL_ALIGN(sizeof (struct nhere)),
SHELL_ALIGN(sizeof (struct nhere)),
SHELL_ALIGN(sizeof (struct nnot)),
};
STATIC void calcsize(union node *);
STATIC void sizenodelist(struct nodelist *);
STATIC union node *copynode(union node *);
STATIC struct nodelist *copynodelist(struct nodelist *);
STATIC char *nodesavestr(char *);
/*
* Make a copy of a parse tree.
*/
union node *
copyfunc(n)
union node *n;
{
if (n == NULL)
return NULL;
funcblocksize = 0;
funcstringsize = 0;
calcsize(n);
funcblock = ckmalloc(funcblocksize + funcstringsize);
funcstring = (char *) funcblock + funcblocksize;
return copynode(n);
}
STATIC void
calcsize(n)
union node *n;
{
if (n == NULL)
return;
funcblocksize += nodesize[n->type];
switch (n->type) {
case NSEMI:
case NAND:
case NOR:
case NWHILE:
case NUNTIL:
calcsize(n->nbinary.ch2);
calcsize(n->nbinary.ch1);
break;
case NCMD:
calcsize(n->ncmd.redirect);
calcsize(n->ncmd.args);
break;
case NPIPE:
sizenodelist(n->npipe.cmdlist);
break;
case NREDIR:
case NBACKGND:
case NSUBSHELL:
calcsize(n->nredir.redirect);
calcsize(n->nredir.n);
break;
case NIF:
calcsize(n->nif.elsepart);
calcsize(n->nif.ifpart);
calcsize(n->nif.test);
break;
case NFOR:
funcstringsize += strlen(n->nfor.var) + 1;
calcsize(n->nfor.body);
calcsize(n->nfor.args);
break;
case NCASE:
calcsize(n->ncase.cases);
calcsize(n->ncase.expr);
break;
case NCLIST:
calcsize(n->nclist.body);
calcsize(n->nclist.pattern);
calcsize(n->nclist.next);
break;
case NDEFUN:
case NARG:
sizenodelist(n->narg.backquote);
funcstringsize += strlen(n->narg.text) + 1;
calcsize(n->narg.next);
break;
case NTO:
case NCLOBBER:
case NFROM:
case NFROMTO:
case NAPPEND:
calcsize(n->nfile.fname);
calcsize(n->nfile.next);
break;
case NTOFD:
case NFROMFD:
calcsize(n->ndup.vname);
calcsize(n->ndup.next);
break;
case NHERE:
case NXHERE:
calcsize(n->nhere.doc);
calcsize(n->nhere.next);
break;
case NNOT:
calcsize(n->nnot.com);
break;
};
}
STATIC void
sizenodelist(lp)
struct nodelist *lp;
{
while (lp) {
funcblocksize += SHELL_ALIGN(sizeof(struct nodelist));
calcsize(lp->n);
lp = lp->next;
}
}
STATIC union node *
copynode(n)
union node *n;
{
union node *new;
if (n == NULL)
return NULL;
new = funcblock;
funcblock = (char *) funcblock + nodesize[n->type];
switch (n->type) {
case NSEMI:
case NAND:
case NOR:
case NWHILE:
case NUNTIL:
new->nbinary.ch2 = copynode(n->nbinary.ch2);
new->nbinary.ch1 = copynode(n->nbinary.ch1);
break;
case NCMD:
new->ncmd.redirect = copynode(n->ncmd.redirect);
new->ncmd.args = copynode(n->ncmd.args);
new->ncmd.backgnd = n->ncmd.backgnd;
break;
case NPIPE:
new->npipe.cmdlist = copynodelist(n->npipe.cmdlist);
new->npipe.backgnd = n->npipe.backgnd;
break;
case NREDIR:
case NBACKGND:
case NSUBSHELL:
new->nredir.redirect = copynode(n->nredir.redirect);
new->nredir.n = copynode(n->nredir.n);
break;
case NIF:
new->nif.elsepart = copynode(n->nif.elsepart);
new->nif.ifpart = copynode(n->nif.ifpart);
new->nif.test = copynode(n->nif.test);
break;
case NFOR:
new->nfor.var = nodesavestr(n->nfor.var);
new->nfor.body = copynode(n->nfor.body);
new->nfor.args = copynode(n->nfor.args);
break;
case NCASE:
new->ncase.cases = copynode(n->ncase.cases);
new->ncase.expr = copynode(n->ncase.expr);
break;
case NCLIST:
new->nclist.body = copynode(n->nclist.body);
new->nclist.pattern = copynode(n->nclist.pattern);
new->nclist.next = copynode(n->nclist.next);
break;
case NDEFUN:
case NARG:
new->narg.backquote = copynodelist(n->narg.backquote);
new->narg.text = nodesavestr(n->narg.text);
new->narg.next = copynode(n->narg.next);
break;
case NTO:
case NCLOBBER:
case NFROM:
case NFROMTO:
case NAPPEND:
new->nfile.fname = copynode(n->nfile.fname);
new->nfile.fd = n->nfile.fd;
new->nfile.next = copynode(n->nfile.next);
break;
case NTOFD:
case NFROMFD:
new->ndup.vname = copynode(n->ndup.vname);
new->ndup.dupfd = n->ndup.dupfd;
new->ndup.fd = n->ndup.fd;
new->ndup.next = copynode(n->ndup.next);
break;
case NHERE:
case NXHERE:
new->nhere.doc = copynode(n->nhere.doc);
new->nhere.fd = n->nhere.fd;
new->nhere.next = copynode(n->nhere.next);
break;
case NNOT:
new->nnot.com = copynode(n->nnot.com);
break;
};
new->type = n->type;
return new;
}
STATIC struct nodelist *
copynodelist(lp)
struct nodelist *lp;
{
struct nodelist *start;
struct nodelist **lpp;
lpp = &start;
while (lp) {
*lpp = funcblock;
funcblock = (char *) funcblock +
SHELL_ALIGN(sizeof(struct nodelist));
(*lpp)->n = copynode(lp->n);
lp = lp->next;
lpp = &(*lpp)->next;
}
*lpp = NULL;
return start;
}
STATIC char *
nodesavestr(s)
char *s;
{
register char *p = s;
register char *q = funcstring;
char *rtn = funcstring;
while ((*q++ = *p++) != 0)
continue;
funcstring = q;
return rtn;
}
/*
* Free a parse tree.
*/
void
freefunc(n)
union node *n;
{
if (n)
ckfree(n);
}