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 /*
   9  * Define _STDBOOL_H here to avoid macro expansion of true and false.
  10  * If the future code requires macro true or false, remove this define
  11  * and undef true and false before U_BOOT_CMD. This define and comment
  12  * shall be removed if change to U_BOOT_CMD is made to take string
  13  * instead of stringifying it.
  14  */
  15 #define _STDBOOL_H
  16
  17 #include <common.h>
  18 #include <command.h>
  19
  20 static int do_test(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
  21 {
  22         char * const *ap;
  23         int left, adv, expr, last_expr, neg, last_cmp;
  24
  25         /* args? */
  26         if (argc < 3)
  27                 return 1;
  28
  29 #ifdef DEBUG
  30         {
  31                 debug("test(%d):", argc);
  32                 left = 1;
  33                 while (argv[left])
  34                         debug(" '%s'", argv[left++]);
  35         }
  36 #endif
  37
  38         last_expr = 0;
  39         left = argc - 1; ap = argv + 1;
  40         if (left > 0 && strcmp(ap[0], "!") == 0) {
  41                 neg = 1;
  42                 ap++;
  43                 left--;
  44         } else
  45                 neg = 0;
  46
  47         expr = -1;
  48         last_cmp = -1;
  49         last_expr = -1;
  50         while (left > 0) {
  51
  52                 if (strcmp(ap[0], "-o") == 0 || strcmp(ap[0], "-a") == 0)
  53                         adv = 1;
  54                 else if (strcmp(ap[0], "-z") == 0 || strcmp(ap[0], "-n") == 0)
  55                         adv = 2;
  56                 else
  57                         adv = 3;
  58
  59                 if (left < adv) {
  60                         expr = 1;
  61                         break;
  62                 }
  63
  64                 if (adv == 1) {
  65                         if (strcmp(ap[0], "-o") == 0) {
  66                                 last_expr = expr;
  67                                 last_cmp = 0;
  68                         } else if (strcmp(ap[0], "-a") == 0) {
  69                                 last_expr = expr;
  70                                 last_cmp = 1;
  71                         } else {
  72                                 expr = 1;
  73                                 break;
  74                         }
  75                 }
  76
  77                 if (adv == 2) {
  78                         if (strcmp(ap[0], "-z") == 0)
  79                                 expr = strlen(ap[1]) == 0 ? 1 : 0;
  80                         else if (strcmp(ap[0], "-n") == 0)
  81                                 expr = strlen(ap[1]) == 0 ? 0 : 1;
  82                         else {
  83                                 expr = 1;
  84                                 break;
  85                         }
  86
  87                         if (last_cmp == 0)
  88                                 expr = last_expr || expr;
  89                         else if (last_cmp == 1)
  90                                 expr = last_expr && expr;
  91                         last_cmp = -1;
  92                 }
  93
  94                 if (adv == 3) {
  95                         if (strcmp(ap[1], "=") == 0)
  96                                 expr = strcmp(ap[0], ap[2]) == 0;
  97                         else if (strcmp(ap[1], "!=") == 0)
  98                                 expr = strcmp(ap[0], ap[2]) != 0;
  99                         else if (strcmp(ap[1], ">") == 0)
 100                                 expr = strcmp(ap[0], ap[2]) > 0;
 101                         else if (strcmp(ap[1], "<") == 0)
 102                                 expr = strcmp(ap[0], ap[2]) < 0;
 103                         else if (strcmp(ap[1], "-eq") == 0)
 104                                 expr = simple_strtol(ap[0], NULL, 10) == simple_strtol(ap[2], NULL, 10);
 105                         else if (strcmp(ap[1], "-ne") == 0)
 106                                 expr = simple_strtol(ap[0], NULL, 10) != simple_strtol(ap[2], NULL, 10);
 107                         else if (strcmp(ap[1], "-lt") == 0)
 108                                 expr = simple_strtol(ap[0], NULL, 10) < simple_strtol(ap[2], NULL, 10);
 109                         else if (strcmp(ap[1], "-le") == 0)
 110                                 expr = simple_strtol(ap[0], NULL, 10) <= simple_strtol(ap[2], NULL, 10);
 111                         else if (strcmp(ap[1], "-gt") == 0)
 112                                 expr = simple_strtol(ap[0], NULL, 10) > simple_strtol(ap[2], NULL, 10);
 113                         else if (strcmp(ap[1], "-ge") == 0)
 114                                 expr = simple_strtol(ap[0], NULL, 10) >= simple_strtol(ap[2], NULL, 10);
 115                         else {
 116                                 expr = 1;
 117                                 break;
 118                         }
 119
 120                         if (last_cmp == 0)
 121                                 expr = last_expr || expr;
 122                         else if (last_cmp == 1)
 123                                 expr = last_expr && expr;
 124                         last_cmp = -1;
 125                 }
 126
 127                 ap += adv; left -= adv;
 128         }
 129
 130         if (neg)
 131                 expr = !expr;
 132
 133         expr = !expr;
 134
 135         debug (": returns %d\n", expr);
 136
 137         return expr;
 138 }
 139
 140 U_BOOT_CMD(
 141         test,   CONFIG_SYS_MAXARGS,     1,      do_test,
 142         "minimal test like /bin/sh",
 143         "[args..]"
 144 );
 145
 146 static int do_false(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 147 {
 148         return 1;
 149 }
 150
 151 U_BOOT_CMD(
 152         false,  CONFIG_SYS_MAXARGS,     1,      do_false,
 153         "do nothing, unsuccessfully",
 154         NULL
 155 );
 156
 157 static int do_true(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 158 {
 159         return 0;
 160 }
 161
 162 U_BOOT_CMD(
 163         true,   CONFIG_SYS_MAXARGS,     1,      do_true,
 164         "do nothing, successfully",
 165         NULL
 166 );