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db_expr.c (12473) db_expr.c (12515)
1/*
2 * Mach Operating System
3 * Copyright (c) 1991,1990 Carnegie Mellon University
4 * All Rights Reserved.
5 *
6 * Permission to use, copy, modify and distribute this software and its
7 * documentation is hereby granted, provided that both the copyright
8 * notice and this permission notice appear in all copies of the

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18 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
19 * School of Computer Science
20 * Carnegie Mellon University
21 * Pittsburgh PA 15213-3890
22 *
23 * any improvements or extensions that they make and grant Carnegie the
24 * rights to redistribute these changes.
25 *
1/*
2 * Mach Operating System
3 * Copyright (c) 1991,1990 Carnegie Mellon University
4 * All Rights Reserved.
5 *
6 * Permission to use, copy, modify and distribute this software and its
7 * documentation is hereby granted, provided that both the copyright
8 * notice and this permission notice appear in all copies of the

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18 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
19 * School of Computer Science
20 * Carnegie Mellon University
21 * Pittsburgh PA 15213-3890
22 *
23 * any improvements or extensions that they make and grant Carnegie the
24 * rights to redistribute these changes.
25 *
26 * $Id: db_expr.c,v 1.5 1995/05/30 07:56:56 rgrimes Exp $
26 * $Id: db_expr.c,v 1.6 1995/11/24 14:13:34 bde Exp $
27 */
28
29/*
30 * Author: David B. Golub, Carnegie Mellon University
31 * Date: 7/90
32 */
33#include <sys/param.h>
34#include <sys/systm.h>
35#include <sys/proc.h>
36#include <ddb/ddb.h>
37#include <ddb/db_lex.h>
38#include <ddb/db_access.h>
39#include <ddb/db_command.h>
40
27 */
28
29/*
30 * Author: David B. Golub, Carnegie Mellon University
31 * Date: 7/90
32 */
33#include <sys/param.h>
34#include <sys/systm.h>
35#include <sys/proc.h>
36#include <ddb/ddb.h>
37#include <ddb/db_lex.h>
38#include <ddb/db_access.h>
39#include <ddb/db_command.h>
40
41extern boolean_t db_add_expr __P((db_expr_t *valuep));
42extern boolean_t db_mult_expr __P((db_expr_t *valuep));
43extern boolean_t db_shift_expr __P((db_expr_t *valuep));
44extern boolean_t db_term __P((db_expr_t *valuep));
45extern boolean_t db_unary __P((db_expr_t *valuep));
41static boolean_t db_add_expr __P((db_expr_t *valuep));
42static boolean_t db_mult_expr __P((db_expr_t *valuep));
43static boolean_t db_shift_expr __P((db_expr_t *valuep));
44static boolean_t db_term __P((db_expr_t *valuep));
45static boolean_t db_unary __P((db_expr_t *valuep));
46
46
47boolean_t
47static boolean_t
48db_term(valuep)
49 db_expr_t *valuep;
50{
51 int t;
52
53 t = db_read_token();
54 if (t == tIDENT) {
55 if (!db_value_of_name(db_tok_string, valuep)) {

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94 /*NOTREACHED*/
95 }
96 return (TRUE);
97 }
98 db_unread_token(t);
99 return (FALSE);
100}
101
48db_term(valuep)
49 db_expr_t *valuep;
50{
51 int t;
52
53 t = db_read_token();
54 if (t == tIDENT) {
55 if (!db_value_of_name(db_tok_string, valuep)) {

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94 /*NOTREACHED*/
95 }
96 return (TRUE);
97 }
98 db_unread_token(t);
99 return (FALSE);
100}
101
102boolean_t
102static boolean_t
103db_unary(valuep)
104 db_expr_t *valuep;
105{
106 int t;
107
108 t = db_read_token();
109 if (t == tMINUS) {
110 if (!db_unary(valuep)) {

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122 }
123 *valuep = db_get_value((db_addr_t)*valuep, sizeof(int), FALSE);
124 return (TRUE);
125 }
126 db_unread_token(t);
127 return (db_term(valuep));
128}
129
103db_unary(valuep)
104 db_expr_t *valuep;
105{
106 int t;
107
108 t = db_read_token();
109 if (t == tMINUS) {
110 if (!db_unary(valuep)) {

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122 }
123 *valuep = db_get_value((db_addr_t)*valuep, sizeof(int), FALSE);
124 return (TRUE);
125 }
126 db_unread_token(t);
127 return (db_term(valuep));
128}
129
130boolean_t
130static boolean_t
131db_mult_expr(valuep)
132 db_expr_t *valuep;
133{
134 db_expr_t lhs, rhs;
135 int t;
136
137 if (!db_unary(&lhs))
138 return (FALSE);

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159 }
160 t = db_read_token();
161 }
162 db_unread_token(t);
163 *valuep = lhs;
164 return (TRUE);
165}
166
131db_mult_expr(valuep)
132 db_expr_t *valuep;
133{
134 db_expr_t lhs, rhs;
135 int t;
136
137 if (!db_unary(&lhs))
138 return (FALSE);

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159 }
160 t = db_read_token();
161 }
162 db_unread_token(t);
163 *valuep = lhs;
164 return (TRUE);
165}
166
167boolean_t
167static boolean_t
168db_add_expr(valuep)
169 db_expr_t *valuep;
170{
171 db_expr_t lhs, rhs;
172 int t;
173
174 if (!db_mult_expr(&lhs))
175 return (FALSE);

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186 lhs -= rhs;
187 t = db_read_token();
188 }
189 db_unread_token(t);
190 *valuep = lhs;
191 return (TRUE);
192}
193
168db_add_expr(valuep)
169 db_expr_t *valuep;
170{
171 db_expr_t lhs, rhs;
172 int t;
173
174 if (!db_mult_expr(&lhs))
175 return (FALSE);

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186 lhs -= rhs;
187 t = db_read_token();
188 }
189 db_unread_token(t);
190 *valuep = lhs;
191 return (TRUE);
192}
193
194boolean_t
194static boolean_t
195db_shift_expr(valuep)
196 db_expr_t *valuep;
197{
198 db_expr_t lhs, rhs;
199 int t;
200
201 if (!db_add_expr(&lhs))
202 return (FALSE);

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196 db_expr_t *valuep;
197{
198 db_expr_t lhs, rhs;
199 int t;
200
201 if (!db_add_expr(&lhs))
202 return (FALSE);

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