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When printing usage information for a key-value parser, the
documentation of the keys and values is printed in the second column of
the usage text:
-s, --stream key=value[,key=value,...] ... Set configuration of a camera stream
height=integer Height in pixels
pixelformat=string Pixel format name
role=string Role for the stream (viewfinder, video, still, raw)
width=integer Width in pixels
-h, --help Display this help message
This results in long lines. Improve this by moving the key description
to the first column, and aligning the value description as other option
description text:
-s, --stream key=value[,key=value,...] ... Set configuration of a camera stream
height=integer Height in pixels
pixelformat=string Pixel format name
role=string Role for the stream (viewfinder, video, still, raw)
width=integer Width in pixels
-h, --help Display this help message
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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To prepare for code reuse, split the printing of options out of
OptionsParser::usage() to a separate function.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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Add an Option::optionName() function that returns a string describing
the option name, with leading dashes. As a result,
OptionsParser::parseValueError() function becomes a single-line function
and can be inlined in its caller.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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Before extending the option parser, document its existing API.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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The Option structure is an internal implementation detail and shouldn't
be exposed in the API. Move it to options.cpp. This requires moving the
inline constructors and destructors for the KeyValueParser and
OptionsParser classes to options.cpp as well, as they need a full
definition of the Option structure.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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The parseValue function is given the optarg directly from the getopt
library, but the function retains the same name.
This causes an shadowed variable of the global optarg variable to be
present in the parseValue function. While this is not harmful, rename it
to work towards disabling shadowed variables.
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
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operator[] doesn't check if the option exists in the values_ map, so it
can return a pointer to location outside the map.
Fix by returning an empty OptionValue if the option is not found.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@iki.fi>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
[Kieran: Adjust s_empty naming to 'empty']
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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Extend OptionsBase<T> with a public invalidate() method. This allows for
further examination of the options and if found unsuitable be
invalidated. The intended user for this new interface are subclasses of
KeyValueParser.
Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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gcc 8 and 9 complain about the OptionValue::integer_ member being
possibly used initialized when compiled in release mode. I haven't been
able to find where this could be the case, and the compiler error
message isn't helpful:
In file included from ../../src/cam/options.cpp:14:
../../src/cam/options.h: In member function ‘bool OptionsBase<T>::parseValue(const T&, const Option&, const char*) [with T = std::__cxx11::basic_string<char>]’:
../../src/cam/options.h:84:7: error: ‘<anonymous>.OptionValue::integer_’ may be used uninitialized in this function [-Werror=maybe-uninitialized]
class OptionValue
^~~~~~~~~~~
../../src/cam/options.h: In member function ‘bool OptionsBase<T>::parseValue(const T&, const Option&, const char*) [with T = int]’:
../../src/cam/options.h:84:7: error: ‘<anonymous>.OptionValue::integer_’ may be used uninitialized in this function [-Werror=maybe-uninitialized]
class OptionValue
^~~~~~~~~~~
Furthermore valgrind doesn't report any issue. This is likely a false
positive, but fix it nonetheless as the fix is cheap.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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Comply with the coding style by removing lots of unneeded semicolons.
Fix a few other coding style violations on the lines touched by those
fixes.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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Now that our usage of C compatibility header is documented, use them
consistently through the source code.
While at it, group the C and C++ include statements as defined in the
coding style, and fix a handful of #include ordering issues.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
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Integer options have to use base 10. This isn't user-friendly when
specifying pixel formats. Detect the base automatically to support base
16. As a side effect, integer values starting with 0 will be interpreted
in base 8.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
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Adding an integer value to a char pointer doesn't concatenate strings,
it indexes in the pointed string. Fix it.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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According to clang, variable-length arrays can't be initialised. Don't
do so, and explicitly set the last element to 0 instead.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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An empty option list is not necessarily an error. Add a new empty()
function to test the option list for emptiness, and modify the valid()
function to only notify parsing errors. As a side effect this allows
accessing partially parsed options, which may be useful in the future.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
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Add a flag to indicate if an option can be repeatable. If an option is
repeatable it must be accessed thru the array interface, even if it's
only specified once by the user.
Also update the usage generator to indicate which options are
repeatable.
Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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To allow specifying the same argument option multiple times a new type
of OptionValue is needed. As parsing of options is an iterative process
there is a need to append options as they are parsed so instead of
setting values using the constructor a new addValue() method is used.
Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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In preparation for support of multiple instances of the same option,
create a separate enum for the OptionValue types as it will diverge from
enum OptionType.
Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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Our coding style doesn't add a space after the template keyword. Fix the
source code accordingly.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
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The OptionValue class defines operators to convert the variant to all
the supported option types. As a convenience, add explicit methods to
perform the same operations, avoiding the need to write long
static_cast<>() statements in the caller.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
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Some options passed to the cam utility need to be complex and specify a
list of key=value pairs. Add a new parser to deal with these options,
usable on its own to parse key=value pairs from any string.
Integrate the KeyValueParser into the existing OptionsParser. The cam
application can fully describe all its options in one location and
perform full parsing of all arguments in one go. The KeyValueParser also
integrates itself with the usage() printing of the OptionsParser.
Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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Extend the options parser with support for option types. All options
must now specify the type of their argument, and the parser
automatically parses the argument and handles errors internally.
Available types are none, integer or string.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
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To later extend the options handling to cover subparsing of arguments it
will be needed to know if the addition of the option itself was
successful or not. The information is already present in addOption()
this change just makes it available.
Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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In preparation to adding more parsers create a template class to hold
the parsed information. The rational for making it a template are that
different parsers can index the options using different data types.
The OptionsParser index its options using an int while the upcoming
KeyValyeParser will index its options using strings for example.
Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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Split multi-line help messages and indent all lines the same way.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
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It's not stated in the getopt_long documentation but optional arguments
need to be specified as '--foo=bar' instead of '--foo bar', otherwise
the value is not propagated to optarg during argument parsing. Update
the usage printing helper to reflect this requirement.
Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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The compiler creates a move constructor automatically when none is
supplied, and it does the right thing by default in this case. Using
std::move() inside the function prevents the compiler from doing
return value optimization and actually hinders performances. Using
std::move() in the caller is unnecessary, the move constructor is used
automatically by the compiler.
For all these reasons remove the tentative optimization that resulted in
worse performances and worse code.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
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And turn it into an OptionsParser object.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
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