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
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
|
/*
* Copyright 2000-2009
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* SPDX-License-Identifier: GPL-2.0+
*/
/*
* 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>
#define OP_INVALID 0
#define OP_OR 2
#define OP_AND 3
#define OP_STR_EMPTY 4
#define OP_STR_NEMPTY 5
#define OP_STR_EQ 6
#define OP_STR_NEQ 7
#define OP_STR_LT 8
#define OP_STR_GT 9
#define OP_INT_EQ 10
#define OP_INT_NEQ 11
#define OP_INT_LT 12
#define OP_INT_LE 13
#define OP_INT_GT 14
#define OP_INT_GE 15
const struct {
int arg;
const char *str;
int op;
int adv;
} op_adv[] = {
{0, "-o", OP_OR, 1},
{0, "-a", OP_AND, 1},
{0, "-z", OP_STR_EMPTY, 2},
{0, "-n", OP_STR_NEMPTY, 2},
{1, "=", OP_STR_EQ, 3},
{1, "!=", OP_STR_NEQ, 3},
{1, "<", OP_STR_LT, 3},
{1, ">", OP_STR_GT, 3},
{1, "-eq", OP_INT_EQ, 3},
{1, "-ne", OP_INT_NEQ, 3},
{1, "-lt", OP_INT_LT, 3},
{1, "-le", OP_INT_LE, 3},
{1, "-gt", OP_INT_GT, 3},
{1, "-ge", OP_INT_GE, 3},
};
static int do_test(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
char * const *ap;
int i, op, 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 = OP_INVALID;
last_expr = -1;
while (left > 0) {
for (i = 0; i < ARRAY_SIZE(op_adv); i++) {
if (left <= op_adv[i].arg)
continue;
if (!strcmp(ap[op_adv[i].arg], op_adv[i].str)) {
op = op_adv[i].op;
adv = op_adv[i].adv;
break;
}
}
if (i == ARRAY_SIZE(op_adv)) {
expr = 1;
break;
}
if (left < adv) {
expr = 1;
break;
}
switch (op) {
case OP_STR_EMPTY:
expr = strlen(ap[1]) == 0 ? 1 : 0;
break;
case OP_STR_NEMPTY:
expr = strlen(ap[1]) == 0 ? 0 : 1;
break;
case OP_STR_EQ:
expr = strcmp(ap[0], ap[2]) == 0;
break;
case OP_STR_NEQ:
expr = strcmp(ap[0], ap[2]) != 0;
break;
case OP_STR_LT:
expr = strcmp(ap[0], ap[2]) < 0;
break;
case OP_STR_GT:
expr = strcmp(ap[0], ap[2]) > 0;
break;
case OP_INT_EQ:
expr = simple_strtol(ap[0], NULL, 10) ==
simple_strtol(ap[2], NULL, 10);
break;
case OP_INT_NEQ:
expr = simple_strtol(ap[0], NULL, 10) !=
simple_strtol(ap[2], NULL, 10);
break;
case OP_INT_LT:
expr = simple_strtol(ap[0], NULL, 10) <
simple_strtol(ap[2], NULL, 10);
break;
case OP_INT_LE:
expr = simple_strtol(ap[0], NULL, 10) <=
simple_strtol(ap[2], NULL, 10);
break;
case OP_INT_GT:
expr = simple_strtol(ap[0], NULL, 10) >
simple_strtol(ap[2], NULL, 10);
break;
case OP_INT_GE:
expr = simple_strtol(ap[0], NULL, 10) >=
simple_strtol(ap[2], NULL, 10);
break;
}
switch (op) {
case OP_OR:
last_expr = expr;
last_cmp = OP_OR;
break;
case OP_AND:
last_expr = expr;
last_cmp = OP_AND;
break;
default:
if (last_cmp == OP_OR)
expr = last_expr || expr;
else if (last_cmp == OP_AND)
expr = last_expr && expr;
last_cmp = OP_INVALID;
break;
}
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
);
|
