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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>
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Import the following helper functions from Busybox-1.33.1 which are
required by printf.c:
process_escape_sequence from libbb/process_escape_sequence.c,
skip_whitespace from libbb/skip_whitespace.c,
overlapping_strcpy from libbb/safe_strncpy.c
src-url: https://git.busybox.net/busybox/
commit bcc5b0e6caca6c7602a6a41f "Bump version to 1.33.1"
version: 1.33.1
Signed-off-by: Roland Gaudig <roland.gaudig@weidmueller.com>
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Import printf.c from the Busybox project, which provides Bash like
format string handling.
src-url: https://git.busybox.net/busybox/
commit bcc5b0e6caca6c7602a6a41f "Bump version to 1.33.1"
version: 1.33.1
Signed-off-by: Roland Gaudig <roland.gaudig@weidmueller.com>
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