summaryrefslogtreecommitdiffstats
path: root/common/cmd_test.c
blob: acc0ecf99b760c0de60b98145f41a0d4b4a066a0 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
/*
 * Copyright 2000-2009
 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 */

/*
 * Define _STDBOOL_H here to avoid macro expansion of true and false.
 * If the future code requires macro true or false, remove this define
 * and undef true and false before U_BOOT_CMD. This define and comment
 * shall be removed if change to U_BOOT_CMD is made to take string
 * instead of stringifying it.
 */
#define _STDBOOL_H

#include <common.h>
#include <command.h>

static int do_test(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
	char * const *ap;
	int left, adv, expr, last_expr, neg, last_cmp;

	/* args? */
	if (argc < 3)
		return 1;

#ifdef DEBUG
	{
		debug("test(%d):", argc);
		left = 1;
		while (argv[left])
			debug(" '%s'", argv[left++]);
	}
#endif

	last_expr = 0;
	left = argc - 1; ap = argv + 1;
	if (left > 0 && strcmp(ap[0], "!") == 0) {
		neg = 1;
		ap++;
		left--;
	} else
		neg = 0;

	expr = -1;
	last_cmp = -1;
	last_expr = -1;
	while (left > 0) {

		if (strcmp(ap[0], "-o") == 0 || strcmp(ap[0], "-a") == 0)
			adv = 1;
		else if (strcmp(ap[0], "-z") == 0 || strcmp(ap[0], "-n") == 0)
			adv = 2;
		else
			adv = 3;

		if (left < adv) {
			expr = 1;
			break;
		}

		if (adv == 1) {
			if (strcmp(ap[0], "-o") == 0) {
				last_expr = expr;
				last_cmp = 0;
			} else if (strcmp(ap[0], "-a") == 0) {
				last_expr = expr;
				last_cmp = 1;
			} else {
				expr = 1;
				break;
			}
		}

		if (adv == 2) {
			if (strcmp(ap[0], "-z") == 0)
				expr = strlen(ap[1]) == 0 ? 1 : 0;
			else if (strcmp(ap[0], "-n") == 0)
				expr = strlen(ap[1]) == 0 ? 0 : 1;
			else {
				expr = 1;
				break;
			}

			if (last_cmp == 0)
				expr = last_expr || expr;
			else if (last_cmp == 1)
				expr = last_expr && expr;
			last_cmp = -1;
		}

		if (adv == 3) {
			if (strcmp(ap[1], "=") == 0)
				expr = strcmp(ap[0], ap[2]) == 0;
			else if (strcmp(ap[1], "!=") == 0)
				expr = strcmp(ap[0], ap[2]) != 0;
			else if (strcmp(ap[1], ">") == 0)
				expr = strcmp(ap[0], ap[2]) > 0;
			else if (strcmp(ap[1], "<") == 0)
				expr = strcmp(ap[0], ap[2]) < 0;
			else if (strcmp(ap[1], "-eq") == 0)
				expr = simple_strtol(ap[0], NULL, 10) == simple_strtol(ap[2], NULL, 10);
			else if (strcmp(ap[1], "-ne") == 0)
				expr = simple_strtol(ap[0], NULL, 10) != simple_strtol(ap[2], NULL, 10);
			else if (strcmp(ap[1], "-lt") == 0)
				expr = simple_strtol(ap[0], NULL, 10) < simple_strtol(ap[2], NULL, 10);
			else if (strcmp(ap[1], "-le") == 0)
				expr = simple_strtol(ap[0], NULL, 10) <= simple_strtol(ap[2], NULL, 10);
			else if (strcmp(ap[1], "-gt") == 0)
				expr = simple_strtol(ap[0], NULL, 10) > simple_strtol(ap[2], NULL, 10);
			else if (strcmp(ap[1], "-ge") == 0)
				expr = simple_strtol(ap[0], NULL, 10) >= simple_strtol(ap[2], NULL, 10);
			else {
				expr = 1;
				break;
			}

			if (last_cmp == 0)
				expr = last_expr || expr;
			else if (last_cmp == 1)
				expr = last_expr && expr;
			last_cmp = -1;
		}

		ap += adv; left -= adv;
	}

	if (neg)
		expr = !expr;

	expr = !expr;

	debug (": returns %d\n", expr);

	return expr;
}

U_BOOT_CMD(
	test,	CONFIG_SYS_MAXARGS,	1,	do_test,
	"minimal test like /bin/sh",
	"[args..]"
);

static int do_false(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
	return 1;
}

U_BOOT_CMD(
	false,	CONFIG_SYS_MAXARGS,	1,	do_false,
	"do nothing, unsuccessfully",
	NULL
);

static int do_true(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
	return 0;
}

U_BOOT_CMD(
	true,	CONFIG_SYS_MAXARGS,	1,	do_true,
	"do nothing, successfully",
	NULL
);
OpenPOWER on IntegriCloud