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Diffstat (limited to 'common/cmd_test.c')
| -rw-r--r-- | common/cmd_test.c | 182 |
1 files changed, 182 insertions, 0 deletions
diff --git a/common/cmd_test.c b/common/cmd_test.c new file mode 100644 index 0000000..acc0ecf --- /dev/null +++ b/common/cmd_test.c @@ -0,0 +1,182 @@ +/* + * 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 + */ + +/* + * Define _STDBOOL_H here to avoid macro expansion of true and false. + * If the future code requires macro true or false, remove this define + * and undef true and false before U_BOOT_CMD. This define and comment + * shall be removed if change to U_BOOT_CMD is made to take string + * instead of stringifying it. + */ +#define _STDBOOL_H + +#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 +); |
