cmd: setexpr: add format string handling
Add format string handling operator to the setexpr command.
It allows to use C or Bash like format string expressions to be
evaluated with the result being stored inside the environment variable
name.
setexpr <name> fmt <format> [value]...
The following example
setexpr foo fmt "%d, 0x%x" 0x100 ff
will result in $foo being set to "256, 0xff".
Signed-off-by: Roland Gaudig <roland.gaudig@weidmueller.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/cmd/Kconfig b/cmd/Kconfig
index e40d390..f1bcf9e 100644
--- a/cmd/Kconfig
+++ b/cmd/Kconfig
@@ -1414,6 +1414,14 @@
Also supports loading the value at a memory location into a variable.
If CONFIG_REGEX is enabled, setexpr also supports a gsub function.
+config CMD_SETEXPR_FMT
+ bool "setexpr_fmt"
+ default n
+ depends on CMD_SETEXPR
+ help
+ Evaluate format string expression and store result in an environment
+ variable.
+
endmenu
menu "Android support commands"