3 * Tait Electronics Limited, Christchurch, New Zealand
5 * See file CREDITS for list of people who contributed to this
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.
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.
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,
25 * This file provides a shell like 'test' function to return
26 * true/false from an integer or string compare of two memory
27 * locations or a location and a scalar/literal.
28 * A few parts were lifted from bash 'test' command
35 #if (CONFIG_COMMANDS & CFG_CMD_ITEST)
45 char *op; /* operator string */
46 int opcode; /* internal representation of opcode */
49 typedef struct op_tbl_s op_tbl_t;
51 op_tbl_t op_table [] = {
67 #define op_tbl_size (sizeof(op_table)/sizeof(op_table[0]))
69 extern int cmd_get_data_size(char* arg, int default_size);
71 static long evalexp(char *s, int w)
75 /* if the parameter starts with a * then assume is a pointer to the value we want */
77 p = (long *)simple_strtoul(&s[1], NULL, 16);
80 l = simple_strtoul(s, NULL, 16);
83 return (l & ((1 << (w * 8)) - 1));
86 static char * evalstr(char *s)
88 /* if the parameter starts with a * then assume a string pointer else its a literal */
90 return (char *)simple_strtoul(&s[1], NULL, 16);
96 static int stringcomp(char *s, char *t, int op)
104 /* we'll do a compare based on the length of the shortest string */
105 n = min(strlen(l), strlen(r));
107 p = strncmp(l, r, n);
109 case EQ: return (p == 0);
110 case NE: return (p != 0);
111 case LT: return (p < 0);
112 case GT: return (p > 0);
113 case LE: return (p <= 0);
114 case GE: return (p >= 0);
119 static int arithcomp (char *s, char *t, int op, int w)
127 case EQ: return (l == r);
128 case NE: return (l != r);
129 case LT: return (l < r);
130 case GT: return (l > r);
131 case LE: return (l <= r);
132 case GE: return (l >= r);
137 int binary_test (char *op, char *arg1, char *arg2, int w)
144 for (optp = (op_tbl_t *)&op_table, i = 0;
148 if ((strncmp (op, optp->op, len) == 0) && (len == strlen (optp->op))) {
150 return (stringcomp(arg1, arg2, optp->opcode));
152 return (arithcomp (arg1, arg2, optp->opcode, w));
157 printf("Unknown operator '%s'\n", op);
158 return 0; /* op code not found */
161 /* command line interface to the shell test */
162 int do_itest ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[] )
166 /* Validate arguments */
168 printf("Usage:\n%s\n", cmdtp->usage);
172 /* Check for a data width specification.
173 * Defaults to long (4) if no specification.
174 * Uses -2 as 'width' for .s (string) so as not to upset existing code
176 switch (w = cmd_get_data_size(argv[0], 4)) {
180 value = binary_test (argv[2], argv[1], argv[3], w);
183 value = binary_test (argv[2], argv[1], argv[3], 0);
187 puts("Invalid data width specifier\n");
196 itest, 4, 0, do_itest,
197 "itest\t- return true/false on integer compare\n",
198 "[.b, .w, .l, .s] [*]value1 <op> [*]value2\n"
200 #endif /* CONFIG_COMMANDS & CFG_CMD_ITEST */