mirror of
https://github.com/brain-hackers/u-boot-brain
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![Tom Rini](/assets/img/avatar_default.png)
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
214 lines
4.0 KiB
C
214 lines
4.0 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright 2000-2009
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*/
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#include <common.h>
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#include <command.h>
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#include <fs.h>
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#define OP_INVALID 0
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#define OP_NOT 1
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#define OP_OR 2
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#define OP_AND 3
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#define OP_STR_EMPTY 4
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#define OP_STR_NEMPTY 5
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#define OP_STR_EQ 6
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#define OP_STR_NEQ 7
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#define OP_STR_LT 8
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#define OP_STR_GT 9
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#define OP_INT_EQ 10
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#define OP_INT_NEQ 11
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#define OP_INT_LT 12
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#define OP_INT_LE 13
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#define OP_INT_GT 14
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#define OP_INT_GE 15
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#define OP_FILE_EXISTS 16
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const struct {
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int arg;
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const char *str;
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int op;
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int adv;
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} op_adv[] = {
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{1, "=", OP_STR_EQ, 3},
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{1, "!=", OP_STR_NEQ, 3},
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{1, "<", OP_STR_LT, 3},
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{1, ">", OP_STR_GT, 3},
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{1, "-eq", OP_INT_EQ, 3},
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{1, "-ne", OP_INT_NEQ, 3},
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{1, "-lt", OP_INT_LT, 3},
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{1, "-le", OP_INT_LE, 3},
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{1, "-gt", OP_INT_GT, 3},
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{1, "-ge", OP_INT_GE, 3},
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{0, "!", OP_NOT, 1},
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{0, "-o", OP_OR, 1},
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{0, "-a", OP_AND, 1},
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{0, "-z", OP_STR_EMPTY, 2},
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{0, "-n", OP_STR_NEMPTY, 2},
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{0, "-e", OP_FILE_EXISTS, 4},
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};
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static int do_test(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
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{
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char * const *ap;
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int i, op, left, adv, expr, last_expr, last_unop, last_binop;
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/* args? */
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if (argc < 3)
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return 1;
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#ifdef DEBUG
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{
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debug("test(%d):", argc);
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left = 1;
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while (argv[left])
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debug(" '%s'", argv[left++]);
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}
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#endif
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left = argc - 1;
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ap = argv + 1;
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expr = 0;
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last_unop = OP_INVALID;
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last_binop = OP_INVALID;
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last_expr = -1;
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while (left > 0) {
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for (i = 0; i < ARRAY_SIZE(op_adv); i++) {
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if (left <= op_adv[i].arg)
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continue;
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if (!strcmp(ap[op_adv[i].arg], op_adv[i].str)) {
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op = op_adv[i].op;
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adv = op_adv[i].adv;
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break;
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}
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}
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if (i == ARRAY_SIZE(op_adv)) {
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expr = 1;
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break;
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}
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if (left < adv) {
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expr = 1;
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break;
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}
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switch (op) {
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case OP_STR_EMPTY:
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expr = strlen(ap[1]) == 0 ? 1 : 0;
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break;
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case OP_STR_NEMPTY:
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expr = strlen(ap[1]) == 0 ? 0 : 1;
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break;
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case OP_STR_EQ:
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expr = strcmp(ap[0], ap[2]) == 0;
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break;
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case OP_STR_NEQ:
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expr = strcmp(ap[0], ap[2]) != 0;
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break;
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case OP_STR_LT:
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expr = strcmp(ap[0], ap[2]) < 0;
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break;
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case OP_STR_GT:
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expr = strcmp(ap[0], ap[2]) > 0;
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break;
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case OP_INT_EQ:
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expr = simple_strtol(ap[0], NULL, 10) ==
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simple_strtol(ap[2], NULL, 10);
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break;
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case OP_INT_NEQ:
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expr = simple_strtol(ap[0], NULL, 10) !=
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simple_strtol(ap[2], NULL, 10);
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break;
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case OP_INT_LT:
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expr = simple_strtol(ap[0], NULL, 10) <
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simple_strtol(ap[2], NULL, 10);
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break;
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case OP_INT_LE:
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expr = simple_strtol(ap[0], NULL, 10) <=
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simple_strtol(ap[2], NULL, 10);
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break;
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case OP_INT_GT:
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expr = simple_strtol(ap[0], NULL, 10) >
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simple_strtol(ap[2], NULL, 10);
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break;
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case OP_INT_GE:
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expr = simple_strtol(ap[0], NULL, 10) >=
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simple_strtol(ap[2], NULL, 10);
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break;
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case OP_FILE_EXISTS:
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expr = file_exists(ap[1], ap[2], ap[3], FS_TYPE_ANY);
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break;
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}
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switch (op) {
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case OP_OR:
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last_expr = expr;
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last_binop = OP_OR;
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break;
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case OP_AND:
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last_expr = expr;
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last_binop = OP_AND;
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break;
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case OP_NOT:
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if (last_unop == OP_NOT)
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last_unop = OP_INVALID;
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else
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last_unop = OP_NOT;
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break;
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default:
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if (last_unop == OP_NOT) {
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expr = !expr;
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last_unop = OP_INVALID;
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}
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if (last_binop == OP_OR)
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expr = last_expr || expr;
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else if (last_binop == OP_AND)
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expr = last_expr && expr;
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last_binop = OP_INVALID;
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break;
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}
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ap += adv; left -= adv;
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}
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expr = !expr;
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debug (": returns %d\n", expr);
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return expr;
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}
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#undef true
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#undef false
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U_BOOT_CMD(
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test, CONFIG_SYS_MAXARGS, 1, do_test,
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"minimal test like /bin/sh",
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"[args..]"
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);
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static int do_false(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
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{
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return 1;
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}
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U_BOOT_CMD(
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false, CONFIG_SYS_MAXARGS, 1, do_false,
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"do nothing, unsuccessfully",
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NULL
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);
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static int do_true(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
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{
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return 0;
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}
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U_BOOT_CMD(
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true, CONFIG_SYS_MAXARGS, 1, do_true,
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"do nothing, successfully",
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NULL
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);
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