From 103c94b10481cf8479c9d0356e5202bc9200a04f Mon Sep 17 00:00:00 2001 From: Wolfgang Denk Date: Sat, 23 Mar 2013 23:50:33 +0000 Subject: [PATCH] setexpr: simplify code, improve help message Simplify the argument checking for the "setexpr" command. This is done mainly to make future extensions easier. Also improve the help message for the one argument version of the command - this does not "load an address", but a value, which in this context may be a plain number or a pointer dereference. Signed-off-by: Wolfgang Denk --- common/cmd_setexpr.c | 18 +++++++++++------- 1 file changed, 11 insertions(+), 7 deletions(-) diff --git a/common/cmd_setexpr.c b/common/cmd_setexpr.c index 7a38e94507..ccd87f4bd8 100644 --- a/common/cmd_setexpr.c +++ b/common/cmd_setexpr.c @@ -56,22 +56,26 @@ static int do_setexpr(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) ulong value; int w; - /* Validate arguments */ - if (argc != 5 && argc != 3) - return CMD_RET_USAGE; - if (argc == 5 && strlen(argv[3]) != 1) + if (argc < 3) return CMD_RET_USAGE; w = cmd_get_data_size(argv[0], 4); a = get_arg(argv[2], w); + /* plain assignment: "setexpr name value" */ if (argc == 3) { setenv_hex(argv[1], a); - return 0; } + /* standard operators: "setexpr name val1 op val2" */ + if (argc != 5) + return CMD_RET_USAGE; + + if (strlen(argv[3]) != 1) + return CMD_RET_USAGE; + b = get_arg(argv[4], w); switch (argv[3][0]) { @@ -117,6 +121,6 @@ U_BOOT_CMD( " express specified by . can be &, |, ^, +, -, *, /, %\n" " size argument is only meaningful if value1 and/or value2 are\n" " memory addresses (*)\n" - "setexpr[.b, .w, .l] name *value\n" - " - load a memory address into a variable" + "setexpr[.b, .w, .l] name [*]value\n" + " - load a value into a variable" ); -- 2.25.1