179 lines
4.2 KiB
Plaintext
179 lines
4.2 KiB
Plaintext
/*-
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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 8.1 (Berkeley) 5/31/93
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* $Id$
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*/
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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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#ifdef __STDC__
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pointer funcblock; /* block to allocate function from */
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#else
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char *funcblock; /* block to allocate function from */
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#endif
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char *funcstring; /* block to allocate strings from */
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%SIZES
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#ifdef __STDC__
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STATIC void calcsize(union node *);
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STATIC void sizenodelist(struct nodelist *);
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STATIC union node *copynode(union node *);
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STATIC struct nodelist *copynodelist(struct nodelist *);
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STATIC char *nodesavestr(char *);
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#else
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STATIC void calcsize();
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STATIC void sizenodelist();
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STATIC union node *copynode();
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STATIC struct nodelist *copynodelist();
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STATIC char *nodesavestr();
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#endif
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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 = 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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%CALCSIZE
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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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%COPY
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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 += 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++);
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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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