From 4c8cf263e280bd1e59241b7a783d61e6621a2c5e Mon Sep 17 00:00:00 2001
From: Benjamin Paassen <bpaassen@techfak.uni-bielefeld.de>
Date: Fri, 13 Feb 2015 11:34:24 +0100
Subject: added VariantReader::parseBool

---
 src/core/common/VariantReader.cpp | 30 ++++++++++++++++++++++++++++++
 src/core/common/VariantReader.hpp | 13 +++++++++++++
 2 files changed, 43 insertions(+)

(limited to 'src/core')

diff --git a/src/core/common/VariantReader.cpp b/src/core/common/VariantReader.cpp
index ef71740..d9e340f 100644
--- a/src/core/common/VariantReader.cpp
+++ b/src/core/common/VariantReader.cpp
@@ -485,6 +485,36 @@ std::pair<bool, std::string> VariantReader::parseUnescapedString(
 	return std::make_pair(true, res.str());
 }
 
+std::pair<bool, Variant::boolType> VariantReader::parseBool(
+    CharReader &reader, Logger &logger)
+{
+	// first we consume all whitespaces.
+	reader.consumePeek();
+	reader.consumeWhitespace();
+	// then we try to find the words "true" or "false".
+
+	bool val = false;
+	CharReaderFork readerFork = reader.fork();
+	LoggerFork loggerFork = logger.fork();
+	auto res = parseToken(readerFork, loggerFork, {});
+	if (res.first) {
+		bool valid = false;
+		if (res.second == "true") {
+			val = true;
+			valid = true;
+		} else if (res.second == "false") {
+			val = false;
+			valid = true;
+		}
+		if (valid) {
+			readerFork.commit();
+			loggerFork.commit();
+			return std::make_pair(true, val);
+		}
+	}
+	return std::make_pair(false, val);
+}
+
 std::pair<bool, int64_t> VariantReader::parseInteger(
     CharReader &reader, Logger &logger, const std::unordered_set<char> &delims)
 {
diff --git a/src/core/common/VariantReader.hpp b/src/core/common/VariantReader.hpp
index 6b157d8..6a87723 100644
--- a/src/core/common/VariantReader.hpp
+++ b/src/core/common/VariantReader.hpp
@@ -132,6 +132,19 @@ public:
 	    CharReader &reader, Logger &logger,
 	    const std::unordered_set<char> &delims);
 
+	/**
+	 * Parses a bool from the given CharReader instance (the strings "true" or
+	 * "false").
+	 *
+	 * @param reader is a reference to the CharReader instance which is
+	 * the source for the character data. The reader will be positioned after
+	 * the bool.
+	 * @param logger is the logger instance that should be used to log error
+	 * messages and warnings.
+	 */
+	static std::pair<bool, Variant::boolType> parseBool(CharReader &reader,
+	                                                    Logger &logger);
+
 	/**
 	 * Parses an integer from the given CharReader instance until one of the
 	 * given delimiter characters is reached.
-- 
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