1// SPDX-License-Identifier: GPL-2.0+ 2/* 3 * Copyright 2000-2009 4 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. 5 */ 6 7#include <common.h> 8#include <command.h> 9#include <fs.h> 10#include <log.h> 11 12#define OP_INVALID 0 13#define OP_NOT 1 14#define OP_OR 2 15#define OP_AND 3 16#define OP_STR_EMPTY 4 17#define OP_STR_NEMPTY 5 18#define OP_STR_EQ 6 19#define OP_STR_NEQ 7 20#define OP_STR_LT 8 21#define OP_STR_GT 9 22#define OP_INT_EQ 10 23#define OP_INT_NEQ 11 24#define OP_INT_LT 12 25#define OP_INT_LE 13 26#define OP_INT_GT 14 27#define OP_INT_GE 15 28#define OP_FILE_EXISTS 16 29 30const struct { 31 int arg; 32 const char *str; 33 int op; 34 int adv; 35} op_adv[] = { 36 {1, "=", OP_STR_EQ, 3}, 37 {1, "!=", OP_STR_NEQ, 3}, 38 {1, "<", OP_STR_LT, 3}, 39 {1, ">", OP_STR_GT, 3}, 40 {1, "-eq", OP_INT_EQ, 3}, 41 {1, "-ne", OP_INT_NEQ, 3}, 42 {1, "-lt", OP_INT_LT, 3}, 43 {1, "-le", OP_INT_LE, 3}, 44 {1, "-gt", OP_INT_GT, 3}, 45 {1, "-ge", OP_INT_GE, 3}, 46 {0, "!", OP_NOT, 1}, 47 {0, "-o", OP_OR, 1}, 48 {0, "-a", OP_AND, 1}, 49 {0, "-z", OP_STR_EMPTY, 2}, 50 {0, "-n", OP_STR_NEMPTY, 2}, 51 {0, "-e", OP_FILE_EXISTS, 4}, 52}; 53 54static int do_test(struct cmd_tbl *cmdtp, int flag, int argc, 55 char *const argv[]) 56{ 57 char * const *ap; 58 int i, op, left, adv, expr, last_expr, last_unop, last_binop; 59 60 /* args? */ 61 if (argc < 3) 62 return 1; 63 64#ifdef DEBUG 65 { 66 debug("test(%d):", argc); 67 left = 1; 68 while (argv[left]) 69 debug(" '%s'", argv[left++]); 70 } 71#endif 72 73 left = argc - 1; 74 ap = argv + 1; 75 expr = 0; 76 last_unop = OP_INVALID; 77 last_binop = OP_INVALID; 78 last_expr = -1; 79 while (left > 0) { 80 for (i = 0; i < ARRAY_SIZE(op_adv); i++) { 81 if (left <= op_adv[i].arg) 82 continue; 83 if (!strcmp(ap[op_adv[i].arg], op_adv[i].str)) { 84 op = op_adv[i].op; 85 adv = op_adv[i].adv; 86 break; 87 } 88 } 89 if (i == ARRAY_SIZE(op_adv)) { 90 expr = 1; 91 break; 92 } 93 if (left < adv) { 94 expr = 1; 95 break; 96 } 97 98 switch (op) { 99 case OP_STR_EMPTY: 100 expr = strlen(ap[1]) == 0 ? 1 : 0; 101 break; 102 case OP_STR_NEMPTY: 103 expr = strlen(ap[1]) == 0 ? 0 : 1; 104 break; 105 case OP_STR_EQ: 106 expr = strcmp(ap[0], ap[2]) == 0; 107 break; 108 case OP_STR_NEQ: 109 expr = strcmp(ap[0], ap[2]) != 0; 110 break; 111 case OP_STR_LT: 112 expr = strcmp(ap[0], ap[2]) < 0; 113 break; 114 case OP_STR_GT: 115 expr = strcmp(ap[0], ap[2]) > 0; 116 break; 117 case OP_INT_EQ: 118 expr = simple_strtol(ap[0], NULL, 0) == 119 simple_strtol(ap[2], NULL, 0); 120 break; 121 case OP_INT_NEQ: 122 expr = simple_strtol(ap[0], NULL, 0) != 123 simple_strtol(ap[2], NULL, 0); 124 break; 125 case OP_INT_LT: 126 expr = simple_strtol(ap[0], NULL, 0) < 127 simple_strtol(ap[2], NULL, 0); 128 break; 129 case OP_INT_LE: 130 expr = simple_strtol(ap[0], NULL, 0) <= 131 simple_strtol(ap[2], NULL, 0); 132 break; 133 case OP_INT_GT: 134 expr = simple_strtol(ap[0], NULL, 0) > 135 simple_strtol(ap[2], NULL, 0); 136 break; 137 case OP_INT_GE: 138 expr = simple_strtol(ap[0], NULL, 0) >= 139 simple_strtol(ap[2], NULL, 0); 140 break; 141 case OP_FILE_EXISTS: 142 expr = file_exists(ap[1], ap[2], ap[3], FS_TYPE_ANY); 143 break; 144 } 145 146 switch (op) { 147 case OP_OR: 148 last_expr = expr; 149 last_binop = OP_OR; 150 break; 151 case OP_AND: 152 last_expr = expr; 153 last_binop = OP_AND; 154 break; 155 case OP_NOT: 156 if (last_unop == OP_NOT) 157 last_unop = OP_INVALID; 158 else 159 last_unop = OP_NOT; 160 break; 161 default: 162 if (last_unop == OP_NOT) { 163 expr = !expr; 164 last_unop = OP_INVALID; 165 } 166 167 if (last_binop == OP_OR) 168 expr = last_expr || expr; 169 else if (last_binop == OP_AND) 170 expr = last_expr && expr; 171 last_binop = OP_INVALID; 172 173 break; 174 } 175 176 ap += adv; left -= adv; 177 } 178 179 expr = !expr; 180 181 debug (": returns %d\n", expr); 182 183 return expr; 184} 185 186#undef true 187#undef false 188 189U_BOOT_CMD( 190 test, CONFIG_SYS_MAXARGS, 1, do_test, 191 "minimal test like /bin/sh", 192 "[args..]" 193); 194 195static int do_false(struct cmd_tbl *cmdtp, int flag, int argc, 196 char *const argv[]) 197{ 198 return 1; 199} 200 201U_BOOT_CMD( 202 false, CONFIG_SYS_MAXARGS, 1, do_false, 203 "do nothing, unsuccessfully", 204 NULL 205); 206 207static int do_true(struct cmd_tbl *cmdtp, int flag, int argc, 208 char *const argv[]) 209{ 210 return 0; 211} 212 213U_BOOT_CMD( 214 true, CONFIG_SYS_MAXARGS, 1, do_true, 215 "do nothing, successfully", 216 NULL 217); 218