348 lines
8.7 KiB
C
348 lines
8.7 KiB
C
/*
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* This file was generated by the mknodes program.
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*/
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/* $NetBSD: nodes.c,v 1.1 2002/01/25 15:35:52 reinoud Exp $ */
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/*-
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* Copyright (c) 1991, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Kenneth Almquist.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)nodes.c.pat 8.2 (Berkeley) 5/4/95
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*/
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#include <stdlib.h>
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/*
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* Routine for dealing with parsed shell commands.
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*/
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#include "shell.h"
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#include "nodes.h"
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#include "memalloc.h"
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#include "machdep.h"
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#include "mystring.h"
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int funcblocksize; /* size of structures in function */
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int funcstringsize; /* size of strings in node */
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pointer funcblock; /* block to allocate function from */
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char *funcstring; /* block to allocate strings from */
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static const short nodesize[25] = {
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ALIGN(sizeof (struct nbinary)),
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ALIGN(sizeof (struct ncmd)),
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ALIGN(sizeof (struct npipe)),
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ALIGN(sizeof (struct nredir)),
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ALIGN(sizeof (struct nredir)),
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ALIGN(sizeof (struct nredir)),
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ALIGN(sizeof (struct nbinary)),
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ALIGN(sizeof (struct nbinary)),
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ALIGN(sizeof (struct nif)),
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ALIGN(sizeof (struct nbinary)),
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ALIGN(sizeof (struct nbinary)),
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ALIGN(sizeof (struct nfor)),
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ALIGN(sizeof (struct ncase)),
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ALIGN(sizeof (struct nclist)),
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ALIGN(sizeof (struct narg)),
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ALIGN(sizeof (struct narg)),
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ALIGN(sizeof (struct nfile)),
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ALIGN(sizeof (struct nfile)),
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ALIGN(sizeof (struct nfile)),
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ALIGN(sizeof (struct nfile)),
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ALIGN(sizeof (struct ndup)),
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ALIGN(sizeof (struct ndup)),
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ALIGN(sizeof (struct nhere)),
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ALIGN(sizeof (struct nhere)),
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ALIGN(sizeof (struct nnot)),
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};
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STATIC void calcsize __P((union node *));
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STATIC void sizenodelist __P((struct nodelist *));
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STATIC union node *copynode __P((union node *));
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STATIC struct nodelist *copynodelist __P((struct nodelist *));
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STATIC char *nodesavestr __P((char *));
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/*
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* Make a copy of a parse tree.
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*/
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union node *
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copyfunc(n)
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union node *n;
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{
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if (n == NULL)
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return NULL;
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funcblocksize = 0;
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funcstringsize = 0;
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calcsize(n);
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funcblock = ckmalloc(funcblocksize + funcstringsize);
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funcstring = (char *) funcblock + funcblocksize;
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return copynode(n);
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}
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STATIC void
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calcsize(n)
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union node *n;
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{
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if (n == NULL)
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return;
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funcblocksize += nodesize[n->type];
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switch (n->type) {
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case NSEMI:
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case NAND:
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case NOR:
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case NWHILE:
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case NUNTIL:
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calcsize(n->nbinary.ch2);
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calcsize(n->nbinary.ch1);
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break;
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case NCMD:
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calcsize(n->ncmd.redirect);
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calcsize(n->ncmd.args);
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break;
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case NPIPE:
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sizenodelist(n->npipe.cmdlist);
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break;
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case NREDIR:
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case NBACKGND:
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case NSUBSHELL:
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calcsize(n->nredir.redirect);
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calcsize(n->nredir.n);
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break;
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case NIF:
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calcsize(n->nif.elsepart);
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calcsize(n->nif.ifpart);
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calcsize(n->nif.test);
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break;
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case NFOR:
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funcstringsize += strlen(n->nfor.var) + 1;
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calcsize(n->nfor.body);
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calcsize(n->nfor.args);
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break;
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case NCASE:
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calcsize(n->ncase.cases);
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calcsize(n->ncase.expr);
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break;
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case NCLIST:
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calcsize(n->nclist.body);
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calcsize(n->nclist.pattern);
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calcsize(n->nclist.next);
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break;
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case NDEFUN:
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case NARG:
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sizenodelist(n->narg.backquote);
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funcstringsize += strlen(n->narg.text) + 1;
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calcsize(n->narg.next);
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break;
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case NTO:
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case NFROM:
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case NFROMTO:
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case NAPPEND:
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calcsize(n->nfile.fname);
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calcsize(n->nfile.next);
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break;
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case NTOFD:
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case NFROMFD:
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calcsize(n->ndup.vname);
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calcsize(n->ndup.next);
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break;
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case NHERE:
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case NXHERE:
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calcsize(n->nhere.doc);
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calcsize(n->nhere.next);
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break;
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case NNOT:
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calcsize(n->nnot.com);
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break;
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};
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}
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STATIC void
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sizenodelist(lp)
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struct nodelist *lp;
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{
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while (lp) {
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funcblocksize += ALIGN(sizeof(struct nodelist));
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calcsize(lp->n);
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lp = lp->next;
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}
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}
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STATIC union node *
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copynode(n)
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union node *n;
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{
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union node *new;
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if (n == NULL)
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return NULL;
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new = funcblock;
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funcblock = (char *) funcblock + nodesize[n->type];
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switch (n->type) {
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case NSEMI:
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case NAND:
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case NOR:
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case NWHILE:
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case NUNTIL:
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new->nbinary.ch2 = copynode(n->nbinary.ch2);
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new->nbinary.ch1 = copynode(n->nbinary.ch1);
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break;
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case NCMD:
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new->ncmd.redirect = copynode(n->ncmd.redirect);
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new->ncmd.args = copynode(n->ncmd.args);
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new->ncmd.backgnd = n->ncmd.backgnd;
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break;
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case NPIPE:
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new->npipe.cmdlist = copynodelist(n->npipe.cmdlist);
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new->npipe.backgnd = n->npipe.backgnd;
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break;
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case NREDIR:
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case NBACKGND:
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case NSUBSHELL:
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new->nredir.redirect = copynode(n->nredir.redirect);
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new->nredir.n = copynode(n->nredir.n);
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break;
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case NIF:
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new->nif.elsepart = copynode(n->nif.elsepart);
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new->nif.ifpart = copynode(n->nif.ifpart);
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new->nif.test = copynode(n->nif.test);
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break;
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case NFOR:
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new->nfor.var = nodesavestr(n->nfor.var);
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new->nfor.body = copynode(n->nfor.body);
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new->nfor.args = copynode(n->nfor.args);
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break;
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case NCASE:
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new->ncase.cases = copynode(n->ncase.cases);
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new->ncase.expr = copynode(n->ncase.expr);
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break;
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case NCLIST:
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new->nclist.body = copynode(n->nclist.body);
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new->nclist.pattern = copynode(n->nclist.pattern);
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new->nclist.next = copynode(n->nclist.next);
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break;
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case NDEFUN:
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case NARG:
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new->narg.backquote = copynodelist(n->narg.backquote);
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new->narg.text = nodesavestr(n->narg.text);
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new->narg.next = copynode(n->narg.next);
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break;
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case NTO:
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case NFROM:
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case NFROMTO:
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case NAPPEND:
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new->nfile.fname = copynode(n->nfile.fname);
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new->nfile.fd = n->nfile.fd;
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new->nfile.next = copynode(n->nfile.next);
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break;
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case NTOFD:
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case NFROMFD:
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new->ndup.vname = copynode(n->ndup.vname);
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new->ndup.dupfd = n->ndup.dupfd;
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new->ndup.fd = n->ndup.fd;
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new->ndup.next = copynode(n->ndup.next);
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break;
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case NHERE:
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case NXHERE:
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new->nhere.doc = copynode(n->nhere.doc);
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new->nhere.fd = n->nhere.fd;
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new->nhere.next = copynode(n->nhere.next);
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break;
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case NNOT:
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new->nnot.com = copynode(n->nnot.com);
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break;
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};
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new->type = n->type;
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return new;
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}
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STATIC struct nodelist *
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copynodelist(lp)
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struct nodelist *lp;
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{
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struct nodelist *start;
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struct nodelist **lpp;
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lpp = &start;
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while (lp) {
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*lpp = funcblock;
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funcblock = (char *) funcblock + ALIGN(sizeof(struct nodelist));
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(*lpp)->n = copynode(lp->n);
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lp = lp->next;
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lpp = &(*lpp)->next;
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}
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*lpp = NULL;
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return start;
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}
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STATIC char *
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nodesavestr(s)
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char *s;
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{
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register char *p = s;
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register char *q = funcstring;
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char *rtn = funcstring;
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while ((*q++ = *p++) != '\0')
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continue;
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funcstring = q;
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return rtn;
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}
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/*
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* Free a parse tree.
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*/
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void
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freefunc(n)
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union node *n;
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{
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if (n)
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ckfree(n);
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}
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