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Diffstat (limited to 'usr/dash/nodes.c.pat')
| -rw-r--r-- | usr/dash/nodes.c.pat | 166 |
1 files changed, 166 insertions, 0 deletions
diff --git a/usr/dash/nodes.c.pat b/usr/dash/nodes.c.pat new file mode 100644 index 0000000..9125bc7 --- /dev/null +++ b/usr/dash/nodes.c.pat @@ -0,0 +1,166 @@ +/*- + * Copyright (c) 1991, 1993 + * The Regents of the University of California. All rights reserved. + * Copyright (c) 1997-2005 + * Herbert Xu <herbert@gondor.apana.org.au>. 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" +#include "system.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 */ + +%SIZES + + +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 *); + + + +/* + * Make a copy of a parse tree. + */ + +struct funcnode * +copyfunc(union node *n) +{ + struct funcnode *f; + size_t blocksize; + + funcblocksize = offsetof(struct funcnode, n); + funcstringsize = 0; + calcsize(n); + blocksize = funcblocksize; + f = ckmalloc(blocksize + funcstringsize); + funcblock = (char *) f + offsetof(struct funcnode, n); + funcstring = (char *) f + blocksize; + copynode(n); + f->count = 0; + return f; +} + + + +STATIC void +calcsize(n) + union node *n; +{ + %CALCSIZE +} + + + +STATIC void +sizenodelist(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; +{ + char *rtn = funcstring; + + funcstring = stpcpy(funcstring, s) + 1; + return rtn; +} + + + +/* + * Free a parse tree. + */ + +void +freefunc(struct funcnode *f) +{ + if (f && --f->count < 0) + ckfree(f); +} |