159 lines
3.9 KiB
C
159 lines
3.9 KiB
C
/*
|
|
* Copyright (c) 1983, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to Berkeley by
|
|
* Edward Wang at The University of California, Berkeley.
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#ifndef lint
|
|
static char sccsid[] = "@(#)var.c 8.1 (Berkeley) 6/6/93";
|
|
#endif /* not lint */
|
|
|
|
#include "value.h"
|
|
#include "var.h"
|
|
#include "string.h"
|
|
|
|
char *malloc();
|
|
|
|
struct var *
|
|
var_set1(head, name, v)
|
|
struct var **head;
|
|
char *name;
|
|
struct value *v;
|
|
{
|
|
register struct var **p;
|
|
register struct var *r;
|
|
struct value val;
|
|
|
|
/* do this first, easier to recover */
|
|
val = *v;
|
|
if (val.v_type == V_STR && val.v_str != 0 &&
|
|
(val.v_str = str_cpy(val.v_str)) == 0)
|
|
return 0;
|
|
if (*(p = var_lookup1(head, name)) == 0) {
|
|
r = (struct var *) malloc(sizeof (struct var));
|
|
if (r == 0) {
|
|
val_free(val);
|
|
return 0;
|
|
}
|
|
if ((r->r_name = str_cpy(name)) == 0) {
|
|
val_free(val);
|
|
free((char *) r);
|
|
return 0;
|
|
}
|
|
r->r_left = r->r_right = 0;
|
|
*p = r;
|
|
} else {
|
|
r = *p;
|
|
val_free(r->r_val);
|
|
}
|
|
r->r_val = val;
|
|
return r;
|
|
}
|
|
|
|
struct var *
|
|
var_setstr1(head, name, str)
|
|
struct var **head;
|
|
char *name;
|
|
char *str;
|
|
{
|
|
struct value v;
|
|
|
|
v.v_type = V_STR;
|
|
v.v_str = str;
|
|
return var_set1(head, name, &v);
|
|
}
|
|
|
|
struct var *
|
|
var_setnum1(head, name, num)
|
|
struct var **head;
|
|
char *name;
|
|
int num;
|
|
{
|
|
struct value v;
|
|
|
|
v.v_type = V_NUM;
|
|
v.v_num = num;
|
|
return var_set1(head, name, &v);
|
|
}
|
|
|
|
var_unset1(head, name)
|
|
struct var **head;
|
|
char *name;
|
|
{
|
|
register struct var **p;
|
|
register struct var *r;
|
|
|
|
if (*(p = var_lookup1(head, name)) == 0)
|
|
return -1;
|
|
r = *p;
|
|
*p = r->r_left;
|
|
while (*p != 0)
|
|
p = &(*p)->r_right;
|
|
*p = r->r_right;
|
|
val_free(r->r_val);
|
|
str_free(r->r_name);
|
|
free((char *) r);
|
|
return 0;
|
|
}
|
|
|
|
struct var **
|
|
var_lookup1(p, name)
|
|
register struct var **p;
|
|
register char *name;
|
|
{
|
|
register cmp;
|
|
|
|
while (*p != 0) {
|
|
if ((cmp = strcmp(name, (*p)->r_name)) < 0)
|
|
p = &(*p)->r_left;
|
|
else if (cmp > 0)
|
|
p = &(*p)->r_right;
|
|
else
|
|
break;
|
|
}
|
|
return p;
|
|
}
|
|
|
|
var_walk1(r, func, a)
|
|
register struct var *r;
|
|
int (*func)();
|
|
long a;
|
|
{
|
|
if (r == 0)
|
|
return 0;
|
|
if (var_walk1(r->r_left, func, a) < 0 || (*func)(a, r) < 0
|
|
|| var_walk1(r->r_right, func, a) < 0)
|
|
return -1;
|
|
return 0;
|
|
}
|