1 // SPDX-License-Identifier: GPL-2.0+
4 * Tait Electronics Limited, Christchurch, New Zealand
8 * This file provides a shell like 'test' function to return
9 * true/false from an integer or string compare of two memory
10 * locations or a location and a scalar/literal.
11 * A few parts were lifted from bash 'test' command
30 char *op; /* operator string */
31 int opcode; /* internal representation of opcode */
34 typedef struct op_tbl_s op_tbl_t;
36 static const op_tbl_t op_table [] = {
52 static long evalexp(char *s, int w)
58 /* if the parameter starts with a * then assume is a pointer to the value we want */
60 addr = simple_strtoul(&s[1], NULL, 16);
61 buf = map_physmem(addr, w, MAP_WRBACK);
63 puts("Failed to map physical memory\n");
68 l = (long)(*(u8 *)buf);
71 l = (long)(*(u16 *)buf);
74 l = (long)(*(u32 *)buf);
76 #ifdef CONFIG_PHYS_64BIT
78 l = (long)(*(unsigned long *)buf);
82 unmap_physmem(buf, w);
85 l = simple_strtoul(s, NULL, 16);
88 /* avoid overflow on mask calculus */
89 return (w >= sizeof(long)) ? l : (l & ((1UL << (w * 8)) - 1));
92 static char * evalstr(char *s)
94 /* if the parameter starts with a * then assume a string pointer else its a literal */
96 return (char *)simple_strtoul(&s[1], NULL, 16);
97 } else if (s[0] == '$') {
103 while (s[i] != '}') {
109 return env_get((const char *)&s[2]);
115 static int stringcomp(char *s, char *t, int op)
125 case EQ: return (p == 0);
126 case NE: return (p != 0);
127 case LT: return (p < 0);
128 case GT: return (p > 0);
129 case LE: return (p <= 0);
130 case GE: return (p >= 0);
135 static int arithcomp (char *s, char *t, int op, int w)
143 case EQ: return (l == r);
144 case NE: return (l != r);
145 case LT: return (l < r);
146 case GT: return (l > r);
147 case LE: return (l <= r);
148 case GE: return (l >= r);
153 static int binary_test(char *op, char *arg1, char *arg2, int w)
156 const op_tbl_t *optp;
160 for (optp = (op_tbl_t *)&op_table, i = 0;
161 i < ARRAY_SIZE(op_table);
164 if ((strncmp (op, optp->op, len) == 0) && (len == strlen (optp->op))) {
166 return (stringcomp(arg1, arg2, optp->opcode));
168 return (arithcomp (arg1, arg2, optp->opcode, w));
173 printf("Unknown operator '%s'\n", op);
174 return 0; /* op code not found */
177 /* command line interface to the shell test */
178 static int do_itest(struct cmd_tbl *cmdtp, int flag, int argc,
183 /* Validate arguments */
185 return CMD_RET_USAGE;
187 /* Check for a data width specification.
188 * Defaults to long (4) if no specification.
189 * Uses -2 as 'width' for .s (string) so as not to upset existing code
191 switch (w = cmd_get_data_size(argv[0], 4)) {
195 #ifdef CONFIG_PHYS_64BIT
198 value = binary_test (argv[2], argv[1], argv[3], w);
201 value = binary_test (argv[2], argv[1], argv[3], 0);
205 puts("Invalid data width specifier\n");
214 itest, 4, 0, do_itest,
215 "return true/false on integer compare",
216 #ifdef CONFIG_PHYS_64BIT
217 "[.b, .w, .l, .q, .s] [*]value1 <op> [*]value2"
219 "[.b, .w, .l, .s] [*]value1 <op> [*]value2"