?? nodes.c.pat
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/* $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 */%SIZESSTATIC 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 voidcalcsize(n) union node *n;{ %CALCSIZE}STATIC voidsizenodelist(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; %COPY 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. */voidfreefunc(n) union node *n;{ if (n) ckfree(n);}
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