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- /*
- * This file was generated by the mknodes program.
- */
-
- /*-
- * 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 */
-
- static const short nodesize[23] = {
- ALIGN(sizeof (struct nbinary)),
- ALIGN(sizeof (struct ncmd)),
- ALIGN(sizeof (struct npipe)),
- ALIGN(sizeof (struct nredir)),
- ALIGN(sizeof (struct nredir)),
- ALIGN(sizeof (struct nredir)),
- ALIGN(sizeof (struct nbinary)),
- ALIGN(sizeof (struct nbinary)),
- ALIGN(sizeof (struct nif)),
- ALIGN(sizeof (struct nbinary)),
- ALIGN(sizeof (struct nbinary)),
- ALIGN(sizeof (struct nfor)),
- ALIGN(sizeof (struct ncase)),
- ALIGN(sizeof (struct nclist)),
- ALIGN(sizeof (struct narg)),
- ALIGN(sizeof (struct narg)),
- ALIGN(sizeof (struct nfile)),
- ALIGN(sizeof (struct nfile)),
- ALIGN(sizeof (struct nfile)),
- ALIGN(sizeof (struct ndup)),
- ALIGN(sizeof (struct ndup)),
- ALIGN(sizeof (struct nhere)),
- ALIGN(sizeof (struct nhere)),
- };
-
-
- #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;
- {
- 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 NFROM:
- case NAPPEND:
- calcsize(n->nfile.fname);
- calcsize(n->nfile.next);
- break;
- case NTOFD:
- case NFROMFD:
- calcsize(n->ndup.next);
- break;
- case NHERE:
- case NXHERE:
- calcsize(n->nhere.doc);
- calcsize(n->nhere.next);
- break;
- };
- }
-
-
-
- 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;
-
- if (n == NULL)
- return NULL;
- new = funcblock;
- 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 NFROM:
- 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.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;
- };
- 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 += 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);
- }
-