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32 * @(#)nodes.c.pat 8.2 (Berkeley) 5/4/95
36 #include <sys/param.h>
39 * Routine for dealing with parsed shell commands.
48 STATIC int funcblocksize; /* size of structures in function */
49 STATIC int funcstringsize; /* size of strings in node */
50 STATIC pointer funcblock; /* block to allocate function from */
51 STATIC char *funcstring; /* block to allocate strings from */
56 STATIC void calcsize(union node *);
57 STATIC void sizenodelist(struct nodelist *);
58 STATIC union node *copynode(union node *);
59 STATIC struct nodelist *copynodelist(struct nodelist *);
60 STATIC char *nodesavestr(char *);
65 * Make a copy of a parse tree.
69 copyfunc(union node *n)
76 funcblock = ckmalloc(funcblocksize + funcstringsize);
77 funcstring = (char *)funcblock + funcblocksize;
84 calcsize(union node *n)
92 sizenodelist(struct nodelist *lp)
95 funcblocksize += ALIGN(sizeof(struct nodelist));
104 copynode(union node *n)
113 STATIC struct nodelist *
114 copynodelist(struct nodelist *lp)
116 struct nodelist *start;
117 struct nodelist **lpp;
122 funcblock = (char *)funcblock + ALIGN(sizeof(struct nodelist));
123 (*lpp)->n = copynode(lp->n);
137 char *q = funcstring;
138 char *rtn = funcstring;
140 while ((*q++ = *p++) != '\0')
153 freefunc(union node *n)