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Peter Tyser6b8f5ad2009-10-16 17:36:25 -05001/*
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 */
23
24#include <common.h>
25#include <command.h>
26
27int do_test(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
28{
29 char **ap;
30 int left, adv, expr, last_expr, neg, last_cmp;
31
32 /* args? */
33 if (argc < 3)
34 return 1;
35
36#if 0
37 {
38 printf("test:");
39 left = 1;
40 while (argv[left])
41 printf(" %s", argv[left++]);
42 }
43#endif
44
45 last_expr = 0;
46 left = argc - 1; ap = argv + 1;
47 if (left > 0 && strcmp(ap[0], "!") == 0) {
48 neg = 1;
49 ap++;
50 left--;
51 } else
52 neg = 0;
53
54 expr = -1;
55 last_cmp = -1;
56 last_expr = -1;
57 while (left > 0) {
58
59 if (strcmp(ap[0], "-o") == 0 || strcmp(ap[0], "-a") == 0)
60 adv = 1;
61 else if (strcmp(ap[0], "-z") == 0 || strcmp(ap[0], "-n") == 0)
62 adv = 2;
63 else
64 adv = 3;
65
66 if (left < adv) {
67 expr = 1;
68 break;
69 }
70
71 if (adv == 1) {
72 if (strcmp(ap[0], "-o") == 0) {
73 last_expr = expr;
74 last_cmp = 0;
75 } else if (strcmp(ap[0], "-a") == 0) {
76 last_expr = expr;
77 last_cmp = 1;
78 } else {
79 expr = 1;
80 break;
81 }
82 }
83
84 if (adv == 2) {
85 if (strcmp(ap[0], "-z") == 0)
86 expr = strlen(ap[1]) == 0 ? 1 : 0;
87 else if (strcmp(ap[0], "-n") == 0)
88 expr = strlen(ap[1]) == 0 ? 0 : 1;
89 else {
90 expr = 1;
91 break;
92 }
93
94 if (last_cmp == 0)
95 expr = last_expr || expr;
96 else if (last_cmp == 1)
97 expr = last_expr && expr;
98 last_cmp = -1;
99 }
100
101 if (adv == 3) {
102 if (strcmp(ap[1], "=") == 0)
103 expr = strcmp(ap[0], ap[2]) == 0;
104 else if (strcmp(ap[1], "!=") == 0)
105 expr = strcmp(ap[0], ap[2]) != 0;
106 else if (strcmp(ap[1], ">") == 0)
107 expr = strcmp(ap[0], ap[2]) > 0;
108 else if (strcmp(ap[1], "<") == 0)
109 expr = strcmp(ap[0], ap[2]) < 0;
110 else if (strcmp(ap[1], "-eq") == 0)
111 expr = simple_strtol(ap[0], NULL, 10) == simple_strtol(ap[2], NULL, 10);
112 else if (strcmp(ap[1], "-ne") == 0)
113 expr = simple_strtol(ap[0], NULL, 10) != simple_strtol(ap[2], NULL, 10);
114 else if (strcmp(ap[1], "-lt") == 0)
115 expr = simple_strtol(ap[0], NULL, 10) < simple_strtol(ap[2], NULL, 10);
116 else if (strcmp(ap[1], "-le") == 0)
117 expr = simple_strtol(ap[0], NULL, 10) <= simple_strtol(ap[2], NULL, 10);
118 else if (strcmp(ap[1], "-gt") == 0)
119 expr = simple_strtol(ap[0], NULL, 10) > simple_strtol(ap[2], NULL, 10);
120 else if (strcmp(ap[1], "-ge") == 0)
121 expr = simple_strtol(ap[0], NULL, 10) >= simple_strtol(ap[2], NULL, 10);
122 else {
123 expr = 1;
124 break;
125 }
126
127 if (last_cmp == 0)
128 expr = last_expr || expr;
129 else if (last_cmp == 1)
130 expr = last_expr && expr;
131 last_cmp = -1;
132 }
133
134 ap += adv; left -= adv;
135 }
136
137 if (neg)
138 expr = !expr;
139
140 expr = !expr;
141
142 debug (": returns %d\n", expr);
143
144 return expr;
145}
146
147U_BOOT_CMD(
148 test, CONFIG_SYS_MAXARGS, 1, do_test,
149 "minimal test like /bin/sh",
150 "[args..]"
151);
Peter Tyser396fd172009-10-16 17:36:27 -0500152
153int do_false(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
154{
155 return 1;
156}
157
158U_BOOT_CMD(
159 false, CONFIG_SYS_MAXARGS, 1, do_false,
160 "do nothing, unsuccessfully",
161 NULL
162);
163
164int do_true(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
165{
166 return 0;
167}
168
169U_BOOT_CMD(
170 true, CONFIG_SYS_MAXARGS, 1, do_true,
171 "do nothing, successfully",
172 NULL
173);