cam: options: Add support for repeatable options

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>

2 files changed, 18 insertions, 8 deletions

diff --git a/src/cam/options.cpp b/src/cam/options.cpp
index 556e7623..92b6b8ef 100644
--- a/src/cam/options.cpp
+++ b/src/cam/options.cpp
@@ -97,7 +97,11 @@ bool OptionsBase<T>::parseValue(const T &opt, const Option &option,
 		break;
 	}
 
-	values_[opt] = value;
+	if (option.isArray)
+		values_[opt].addValue(value);
+	else
+		values_[opt] = value;
+
 	return true;
 }
 
@@ -129,7 +133,7 @@ bool KeyValueParser::addOption(const char *name, OptionType type,
 		return false;
 
 	optionsMap_[name] = Option({ 0, type, name, argument, nullptr,
-				     help, nullptr });
+				     help, nullptr, false });
 	return true;
 }
 
@@ -339,7 +343,7 @@ std::vector<OptionValue> OptionValue::toArray() const
 
 bool OptionsParser::addOption(int opt, OptionType type, const char *help,
 			      const char *name, OptionArgument argument,
-			      const char *argumentName)
+			      const char *argumentName, bool array)
 {
 	/*
 	 * Options must have at least a short or long name, and a text message.
@@ -357,16 +361,16 @@ bool OptionsParser::addOption(int opt, OptionType type, const char *help,
 		return false;
 
 	options_.push_back(Option({ opt, type, name, argument, argumentName,
-				    help, nullptr }));
+				    help, nullptr, array }));
 	optionsMap_[opt] = &options_.back();
 	return true;
 }
 
 bool OptionsParser::addOption(int opt, KeyValueParser *parser, const char *help,
-			      const char *name)
+			      const char *name, bool array)
 {
 	if (!addOption(opt, OptionKeyValue, help, name, ArgumentRequired,
-		       "key=value[,key=value,...]"))
+		       "key=value[,key=value,...]", array))
 		return false;
 
 	options_.back().keyValueParser = parser;
@@ -464,6 +468,8 @@ void OptionsParser::usage()
 			length += 1 + strlen(option.argumentName);
 		if (option.argument == ArgumentOptional)
 			length += 2;
+		if (option.isArray)
+			length += 4;
 
 		if (length > indent)
 			indent = length;
@@ -497,6 +503,9 @@ void OptionsParser::usage()
 				argument += "]";
 		}
 
+		if (option.isArray)
+			argument += " ...";
+
 		std::cerr << std::setw(indent) << std::left << argument;
 
 		for (const char *help = option.help, *end = help; end; ) {
diff --git a/src/cam/options.h b/src/cam/options.h
index e0ff50af..6e3ef62e 100644
--- a/src/cam/options.h
+++ b/src/cam/options.h
@@ -36,6 +36,7 @@ struct Option {
 	const char *argumentName;
 	const char *help;
 	KeyValueParser *keyValueParser;
+	bool isArray;
 
 	bool hasShortOption() const { return isalnum(opt); }
 	bool hasLongOption() const { return name != nullptr; }
@@ -126,9 +127,9 @@ public:
 	bool addOption(int opt, OptionType type, const char *help,
 		       const char *name = nullptr,
 		       OptionArgument argument = ArgumentNone,
-		       const char *argumentName = nullptr);
+		       const char *argumentName = nullptr, bool array = false);
 	bool addOption(int opt, KeyValueParser *parser, const char *help,
-		       const char *name = nullptr);
+		       const char *name = nullptr, bool array = false);
 
 	Options parse(int argc, char *argv[]);
 	void usage();