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1 /*
2  * Copyright 2000-2009
3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
4  *
5  * See file CREDITS for list of people who contributed to this
6  * project.
7  *
8  * This program is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU General Public License as
10  * published by the Free Software Foundation; either version 2 of
11  * the License, or (at your option) any later version.
12  *
13  * This program is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16  * GNU General Public License for more details.
17  *
18  * You should have received a copy of the GNU General Public License
19  * along with this program; if not, write to the Free Software
20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
21  * MA 02111-1307 USA
22  */
24 /*
25  * Define _STDBOOL_H here to avoid macro expansion of true and false.
26  * If the future code requires macro true or false, remove this define
27  * and undef true and false before U_BOOT_CMD. This define and comment
28  * shall be removed if change to U_BOOT_CMD is made to take string
29  * instead of stringifying it.
30  */
31 #define _STDBOOL_H
33 #include <common.h>
34 #include <command.h>
36 static int do_test(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
37 {
38         char * const *ap;
39         int left, adv, expr, last_expr, neg, last_cmp;
41         /* args? */
42         if (argc < 3)
43                 return 1;
45 #ifdef DEBUG
46         {
47                 debug("test(%d):", argc);
48                 left = 1;
49                 while (argv[left])
50                         debug(" '%s'", argv[left++]);
51         }
52 #endif
54         last_expr = 0;
55         left = argc - 1; ap = argv + 1;
56         if (left > 0 && strcmp(ap[0], "!") == 0) {
57                 neg = 1;
58                 ap++;
59                 left--;
60         } else
61                 neg = 0;
63         expr = -1;
64         last_cmp = -1;
65         last_expr = -1;
66         while (left > 0) {
68                 if (strcmp(ap[0], "-o") == 0 || strcmp(ap[0], "-a") == 0)
69                         adv = 1;
70                 else if (strcmp(ap[0], "-z") == 0 || strcmp(ap[0], "-n") == 0)
71                         adv = 2;
72                 else
73                         adv = 3;
75                 if (left < adv) {
76                         expr = 1;
77                         break;
78                 }
80                 if (adv == 1) {
81                         if (strcmp(ap[0], "-o") == 0) {
82                                 last_expr = expr;
83                                 last_cmp = 0;
84                         } else if (strcmp(ap[0], "-a") == 0) {
85                                 last_expr = expr;
86                                 last_cmp = 1;
87                         } else {
88                                 expr = 1;
89                                 break;
90                         }
91                 }
93                 if (adv == 2) {
94                         if (strcmp(ap[0], "-z") == 0)
95                                 expr = strlen(ap[1]) == 0 ? 1 : 0;
96                         else if (strcmp(ap[0], "-n") == 0)
97                                 expr = strlen(ap[1]) == 0 ? 0 : 1;
98                         else {
99                                 expr = 1;
100                                 break;
101                         }
103                         if (last_cmp == 0)
104                                 expr = last_expr || expr;
105                         else if (last_cmp == 1)
106                                 expr = last_expr && expr;
107                         last_cmp = -1;
108                 }
110                 if (adv == 3) {
111                         if (strcmp(ap[1], "=") == 0)
112                                 expr = strcmp(ap[0], ap[2]) == 0;
113                         else if (strcmp(ap[1], "!=") == 0)
114                                 expr = strcmp(ap[0], ap[2]) != 0;
115                         else if (strcmp(ap[1], ">") == 0)
116                                 expr = strcmp(ap[0], ap[2]) > 0;
117                         else if (strcmp(ap[1], "<") == 0)
118                                 expr = strcmp(ap[0], ap[2]) < 0;
119                         else if (strcmp(ap[1], "-eq") == 0)
120                                 expr = simple_strtol(ap[0], NULL, 10) == simple_strtol(ap[2], NULL, 10);
121                         else if (strcmp(ap[1], "-ne") == 0)
122                                 expr = simple_strtol(ap[0], NULL, 10) != simple_strtol(ap[2], NULL, 10);
123                         else if (strcmp(ap[1], "-lt") == 0)
124                                 expr = simple_strtol(ap[0], NULL, 10) < simple_strtol(ap[2], NULL, 10);
125                         else if (strcmp(ap[1], "-le") == 0)
126                                 expr = simple_strtol(ap[0], NULL, 10) <= simple_strtol(ap[2], NULL, 10);
127                         else if (strcmp(ap[1], "-gt") == 0)
128                                 expr = simple_strtol(ap[0], NULL, 10) > simple_strtol(ap[2], NULL, 10);
129                         else if (strcmp(ap[1], "-ge") == 0)
130                                 expr = simple_strtol(ap[0], NULL, 10) >= simple_strtol(ap[2], NULL, 10);
131                         else {
132                                 expr = 1;
133                                 break;
134                         }
136                         if (last_cmp == 0)
137                                 expr = last_expr || expr;
138                         else if (last_cmp == 1)
139                                 expr = last_expr && expr;
140                         last_cmp = -1;
141                 }
143                 ap += adv; left -= adv;
144         }
146         if (neg)
147                 expr = !expr;
149         expr = !expr;
151         debug (": returns %d\n", expr);
153         return expr;
156 U_BOOT_CMD(
157         test,   CONFIG_SYS_MAXARGS,     1,      do_test,
158         "minimal test like /bin/sh",
159         "[args..]"
160 );
162 static int do_false(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
164         return 1;
167 U_BOOT_CMD(
168         false,  CONFIG_SYS_MAXARGS,     1,      do_false,
169         "do nothing, unsuccessfully",
170         NULL
171 );
173 static int do_true(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
175         return 0;
178 U_BOOT_CMD(
179         true,   CONFIG_SYS_MAXARGS,     1,      do_true,
180         "do nothing, successfully",
181         NULL
182 );