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- /*-
- * Copyright (c) 1991 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. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. 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 5.2 (Berkeley) 3/8/91
- */
-
- /*
- * 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 */
- #ifdef __STDC__
- pointer funcblock; /* block to allocate function from */
- #else
- char *funcblock; /* block to allocate function from */
- #endif
- char *funcstring; /* block to allocate strings from */
-
- %SIZES
-
-
- #ifdef __STDC__
- 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 *);
- #else
- STATIC void calcsize();
- STATIC void sizenodelist();
- STATIC union node *copynode();
- STATIC struct nodelist *copynodelist();
- STATIC char *nodesavestr();
- #endif
-
-
-
- /*
- * 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 = funcblock + funcblocksize;
- return copynode(n);
- }
-
-
-
- STATIC void
- calcsize(n)
- union node *n;
- {
- %CALCSIZE
- }
-
-
-
- STATIC void
- sizenodelist(lp)
- struct nodelist *lp;
- {
- while (lp) {
- funcblocksize += 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 += 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++);
- funcstring = q;
- return rtn;
- }
-
-
-
- /*
- * Free a parse tree.
- */
-
- void
- freefunc(n)
- union node *n;
- {
- if (n)
- ckfree(n);
- }
-