common/cmd_test.c

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