2 * Copyright (c) 1991, 1993
3 * The Regents of the University of California. All rights reserved.
5 * This code is derived from software contributed to Berkeley by
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36 * @(#)nodes.c.pat 8.2 (Berkeley) 5/4/95
37 * $FreeBSD: src/bin/sh/nodes.c.pat,v 1.7.2.1 2002/07/19 04:38:52 tjr Exp $
38 * $DragonFly: src/bin/sh/nodes.c.pat,v 1.3 2003/08/24 16:26:00 drhodus Exp $
43 * Routine for dealing with parsed shell commands.
53 STATIC int funcblocksize; /* size of structures in function */
54 STATIC int funcstringsize; /* size of strings in node */
55 STATIC pointer funcblock; /* block to allocate function from */
56 STATIC char *funcstring; /* block to allocate strings from */
61 STATIC void calcsize(union node *);
62 STATIC void sizenodelist(struct nodelist *);
63 STATIC union node *copynode(union node *);
64 STATIC struct nodelist *copynodelist(struct nodelist *);
65 STATIC char *nodesavestr(char *);
70 * Make a copy of a parse tree.
74 copyfunc(union node *n)
81 funcblock = ckmalloc(funcblocksize + funcstringsize);
82 funcstring = (char *)funcblock + funcblocksize;
89 calcsize(union node *n)
97 sizenodelist(struct nodelist *lp)
100 funcblocksize += ALIGN(sizeof(struct nodelist));
109 copynode(union node *n)
118 STATIC struct nodelist *
119 copynodelist(struct nodelist *lp)
121 struct nodelist *start;
122 struct nodelist **lpp;
127 funcblock = (char *)funcblock + ALIGN(sizeof(struct nodelist));
128 (*lpp)->n = copynode(lp->n);
142 char *q = funcstring;
143 char *rtn = funcstring;
145 while ((*q++ = *p++) != '\0')
158 freefunc(union node *n)