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db_expr.c (283088) db_expr.c (283248)
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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24 * rights to redistribute these changes.
25 */
26/*
27 * Author: David B. Golub, Carnegie Mellon University
28 * Date: 7/90
29 */
30
31#include <sys/cdefs.h>
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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24 * rights to redistribute these changes.
25 */
26/*
27 * Author: David B. Golub, Carnegie Mellon University
28 * Date: 7/90
29 */
30
31#include <sys/cdefs.h>
32__FBSDID("$FreeBSD: head/sys/ddb/db_expr.c 283088 2015-05-18 22:27:46Z pfg $");
32__FBSDID("$FreeBSD: head/sys/ddb/db_expr.c 283248 2015-05-21 15:16:18Z pfg $");
33
34#include <sys/param.h>
35
36#include <ddb/ddb.h>
37#include <ddb/db_lex.h>
38#include <ddb/db_access.h>
39#include <ddb/db_command.h>
40
33
34#include <sys/param.h>
35
36#include <ddb/ddb.h>
37#include <ddb/db_lex.h>
38#include <ddb/db_access.h>
39#include <ddb/db_command.h>
40
41static boolean_t db_add_expr(db_expr_t *valuep);
42static boolean_t db_mult_expr(db_expr_t *valuep);
43static boolean_t db_shift_expr(db_expr_t *valuep);
44static boolean_t db_term(db_expr_t *valuep);
45static boolean_t db_unary(db_expr_t *valuep);
41static bool db_add_expr(db_expr_t *valuep);
42static bool db_mult_expr(db_expr_t *valuep);
43static bool db_shift_expr(db_expr_t *valuep);
44static bool db_term(db_expr_t *valuep);
45static bool db_unary(db_expr_t *valuep);
46
46
47static boolean_t
47static bool
48db_term(db_expr_t *valuep)
49{
50 int t;
51
52 t = db_read_token();
53 if (t == tIDENT) {
54 if (!db_value_of_name(db_tok_string, valuep) &&
55 !db_value_of_name_pcpu(db_tok_string, valuep) &&

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95 /*NOTREACHED*/
96 }
97 return (true);
98 }
99 db_unread_token(t);
100 return (false);
101}
102
48db_term(db_expr_t *valuep)
49{
50 int t;
51
52 t = db_read_token();
53 if (t == tIDENT) {
54 if (!db_value_of_name(db_tok_string, valuep) &&
55 !db_value_of_name_pcpu(db_tok_string, valuep) &&

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95 /*NOTREACHED*/
96 }
97 return (true);
98 }
99 db_unread_token(t);
100 return (false);
101}
102
103static boolean_t
103static bool
104db_unary(db_expr_t *valuep)
105{
106 int t;
107
108 t = db_read_token();
109 if (t == tMINUS) {
110 if (!db_unary(valuep)) {
111 db_error("Syntax error\n");

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122 }
123 *valuep = db_get_value((db_addr_t)*valuep, sizeof(void *), false);
124 return (true);
125 }
126 db_unread_token(t);
127 return (db_term(valuep));
128}
129
104db_unary(db_expr_t *valuep)
105{
106 int t;
107
108 t = db_read_token();
109 if (t == tMINUS) {
110 if (!db_unary(valuep)) {
111 db_error("Syntax error\n");

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

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158 }
159 t = db_read_token();
160 }
161 db_unread_token(t);
162 *valuep = lhs;
163 return (true);
164}
165
131db_mult_expr(db_expr_t *valuep)
132{
133 db_expr_t lhs, rhs;
134 int t;
135
136 if (!db_unary(&lhs))
137 return (false);
138

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158 }
159 t = db_read_token();
160 }
161 db_unread_token(t);
162 *valuep = lhs;
163 return (true);
164}
165
166static boolean_t
166static bool
167db_add_expr(db_expr_t *valuep)
168{
169 db_expr_t lhs, rhs;
170 int t;
171
172 if (!db_mult_expr(&lhs))
173 return (false);
174

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184 lhs -= rhs;
185 t = db_read_token();
186 }
187 db_unread_token(t);
188 *valuep = lhs;
189 return (true);
190}
191
167db_add_expr(db_expr_t *valuep)
168{
169 db_expr_t lhs, rhs;
170 int t;
171
172 if (!db_mult_expr(&lhs))
173 return (false);
174

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

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194{
195 db_expr_t lhs, rhs;
196 int t;
197
198 if (!db_add_expr(&lhs))
199 return (false);
200

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