LXR uboot/common/cmd

   1/*
   2 * Copyright 2000-2009
   3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4 *
   5 * See file CREDITS for list of people who contributed to this
   6 * project.
   7 *
   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.
  12 *
  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.
  17 *
  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,
  21 * MA 02111-1307 USA
  22 */
  23
  24#include <common.h>
  25#include <command.h>
  26
  27int do_test(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
  28{
  29        char **ap;
  30        int left, adv, expr, last_expr, neg, last_cmp;
  31
  32        /* args? */
  33        if (argc < 3)
  34                return 1;
  35
  36#if 0
  37        {
  38                printf("test:");
  39                left = 1;
  40                while (argv[left])
  41                        printf(" %s", argv[left++]);
  42        }
  43#endif
  44
  45        last_expr = 0;
  46        left = argc - 1; ap = argv + 1;
  47        if (left > 0 && strcmp(ap[0], "!") == 0) {
  48                neg = 1;
  49                ap++;
  50                left--;
  51        } else
  52                neg = 0;
  53
  54        expr = -1;
  55        last_cmp = -1;
  56        last_expr = -1;
  57        while (left > 0) {
  58
  59                if (strcmp(ap[0], "-o") == 0 || strcmp(ap[0], "-a") == 0)
  60                        adv = 1;
  61                else if (strcmp(ap[0], "-z") == 0 || strcmp(ap[0], "-n") == 0)
  62                        adv = 2;
  63                else
  64                        adv = 3;
  65
  66                if (left < adv) {
  67                        expr = 1;
  68                        break;
  69                }
  70
  71                if (adv == 1) {
  72                        if (strcmp(ap[0], "-o") == 0) {
  73                                last_expr = expr;
  74                                last_cmp = 0;
  75                        } else if (strcmp(ap[0], "-a") == 0) {
  76                                last_expr = expr;
  77                                last_cmp = 1;
  78                        } else {
  79                                expr = 1;
  80                                break;
  81                        }
  82                }
  83
  84                if (adv == 2) {
  85                        if (strcmp(ap[0], "-z") == 0)
  86                                expr = strlen(ap[1]) == 0 ? 1 : 0;
  87                        else if (strcmp(ap[0], "-n") == 0)
  88                                expr = strlen(ap[1]) == 0 ? 0 : 1;
  89                        else {
  90                                expr = 1;
  91                                break;
  92                        }
  93
  94                        if (last_cmp == 0)
  95                                expr = last_expr || expr;
  96                        else if (last_cmp == 1)
  97                                expr = last_expr && expr;
  98                        last_cmp = -1;
  99                }
 100
 101                if (adv == 3) {
 102                        if (strcmp(ap[1], "=") == 0)
 103                                expr = strcmp(ap[0], ap[2]) == 0;
 104                        else if (strcmp(ap[1], "!=") == 0)
 105                                expr = strcmp(ap[0], ap[2]) != 0;
 106                        else if (strcmp(ap[1], ">") == 0)
 107                                expr = strcmp(ap[0], ap[2]) > 0;
 108                        else if (strcmp(ap[1], "<") == 0)
 109                                expr = strcmp(ap[0], ap[2]) < 0;
 110                        else if (strcmp(ap[1], "-eq") == 0)
 111                                expr = simple_strtol(ap[0], NULL, 10) == simple_strtol(ap[2], NULL, 10);
 112                        else if (strcmp(ap[1], "-ne") == 0)
 113                                expr = simple_strtol(ap[0], NULL, 10) != simple_strtol(ap[2], NULL, 10);
 114                        else if (strcmp(ap[1], "-lt") == 0)
 115                                expr = simple_strtol(ap[0], NULL, 10) < simple_strtol(ap[2], NULL, 10);
 116                        else if (strcmp(ap[1], "-le") == 0)
 117                                expr = simple_strtol(ap[0], NULL, 10) <= simple_strtol(ap[2], NULL, 10);
 118                        else if (strcmp(ap[1], "-gt") == 0)
 119                                expr = simple_strtol(ap[0], NULL, 10) > simple_strtol(ap[2], NULL, 10);
 120                        else if (strcmp(ap[1], "-ge") == 0)
 121                                expr = simple_strtol(ap[0], NULL, 10) >= simple_strtol(ap[2], NULL, 10);
 122                        else {
 123                                expr = 1;
 124                                break;
 125                        }
 126
 127                        if (last_cmp == 0)
 128                                expr = last_expr || expr;
 129                        else if (last_cmp == 1)
 130                                expr = last_expr && expr;
 131                        last_cmp = -1;
 132                }
 133
 134                ap += adv; left -= adv;
 135        }
 136
 137        if (neg)
 138                expr = !expr;
 139
 140        expr = !expr;
 141
 142        debug (": returns %d\n", expr);
 143
 144        return expr;
 145}
 146
 147U_BOOT_CMD(
 148        test,   CONFIG_SYS_MAXARGS,     1,      do_test,
 149        "minimal test like /bin/sh",
 150        "[args..]"
 151);
 152
 153int do_false(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 154{
 155        return 1;
 156}
 157
 158U_BOOT_CMD(
 159        false,  CONFIG_SYS_MAXARGS,     1,      do_false,
 160        "do nothing, unsuccessfully",
 161        NULL
 162);
 163
 164int do_true(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 165{
 166        return 0;
 167}
 168
 169U_BOOT_CMD(
 170        true,   CONFIG_SYS_MAXARGS,     1,      do_true,
 171        "do nothing, successfully",
 172        NULL
 173);
 174