/* * Copyright 2000-2009 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. * * See file CREDITS for list of people who contributed to this * project. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation; either version 2 of * the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, * MA 02111-1307 USA */ #include <common.h> #include <command.h> static int do_test(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) { char * const *ap; int left, adv, expr, last_expr, neg, last_cmp; /* args? */ if (argc < 3) return 1; #ifdef DEBUG { debug("test(%d):", argc); left = 1; while (argv[left]) debug(" '%s'", argv[left++]); } #endif last_expr = 0; left = argc - 1; ap = argv + 1; if (left > 0 && strcmp(ap[0], "!") == 0) { neg = 1; ap++; left--; } else neg = 0; expr = -1; last_cmp = -1; last_expr = -1; while (left > 0) { if (strcmp(ap[0], "-o") == 0 || strcmp(ap[0], "-a") == 0) adv = 1; else if (strcmp(ap[0], "-z") == 0 || strcmp(ap[0], "-n") == 0) adv = 2; else adv = 3; if (left < adv) { expr = 1; break; } if (adv == 1) { if (strcmp(ap[0], "-o") == 0) { last_expr = expr; last_cmp = 0; } else if (strcmp(ap[0], "-a") == 0) { last_expr = expr; last_cmp = 1; } else { expr = 1; break; } } if (adv == 2) { if (strcmp(ap[0], "-z") == 0) expr = strlen(ap[1]) == 0 ? 1 : 0; else if (strcmp(ap[0], "-n") == 0) expr = strlen(ap[1]) == 0 ? 0 : 1; else { expr = 1; break; } if (last_cmp == 0) expr = last_expr || expr; else if (last_cmp == 1) expr = last_expr && expr; last_cmp = -1; } if (adv == 3) { if (strcmp(ap[1], "=") == 0) expr = strcmp(ap[0], ap[2]) == 0; else if (strcmp(ap[1], "!=") == 0) expr = strcmp(ap[0], ap[2]) != 0; else if (strcmp(ap[1], ">") == 0) expr = strcmp(ap[0], ap[2]) > 0; else if (strcmp(ap[1], "<") == 0) expr = strcmp(ap[0], ap[2]) < 0; else if (strcmp(ap[1], "-eq") == 0) expr = simple_strtol(ap[0], NULL, 10) == simple_strtol(ap[2], NULL, 10); else if (strcmp(ap[1], "-ne") == 0) expr = simple_strtol(ap[0], NULL, 10) != simple_strtol(ap[2], NULL, 10); else if (strcmp(ap[1], "-lt") == 0) expr = simple_strtol(ap[0], NULL, 10) < simple_strtol(ap[2], NULL, 10); else if (strcmp(ap[1], "-le") == 0) expr = simple_strtol(ap[0], NULL, 10) <= simple_strtol(ap[2], NULL, 10); else if (strcmp(ap[1], "-gt") == 0) expr = simple_strtol(ap[0], NULL, 10) > simple_strtol(ap[2], NULL, 10); else if (strcmp(ap[1], "-ge") == 0) expr = simple_strtol(ap[0], NULL, 10) >= simple_strtol(ap[2], NULL, 10); else { expr = 1; break; } if (last_cmp == 0) expr = last_expr || expr; else if (last_cmp == 1) expr = last_expr && expr; last_cmp = -1; } ap += adv; left -= adv; } if (neg) expr = !expr; expr = !expr; debug (": returns %d\n", expr); return expr; } U_BOOT_CMD( test, CONFIG_SYS_MAXARGS, 1, do_test, "minimal test like /bin/sh", "[args..]" ); static int do_false(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) { return 1; } U_BOOT_CMD( false, CONFIG_SYS_MAXARGS, 1, do_false, "do nothing, unsuccessfully", NULL ); static int do_true(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) { return 0; } U_BOOT_CMD( true, CONFIG_SYS_MAXARGS, 1, do_true, "do nothing, successfully", NULL );