diff --git a/src/RdaReader/include/RdaReader.hpp b/src/RdaReader/include/RdaReader.hpp
index a06635e..18b893e 100644
--- a/src/RdaReader/include/RdaReader.hpp
+++ b/src/RdaReader/include/RdaReader.hpp
@@ -6,11 +6,25 @@
 #include <vector>
 #include <mutex>
 #include <functional>
+#include <filesystem>
 
 class RdaReader {
 	public:
 	RdaReader();
 	RdaReader(std::function<void(const std::string &)> logger);
+
+	size_t readDataset(
+		const std::vector<char> &datasetName,
+		const std::filesystem::path &rootDir,
+		const std::function<void(const char *s, size_t n)> output
+	);
+	size_t readDataset(
+		const std::vector<char> &datasetName,
+		const std::filesystem::path &rootDir,
+		const std::function<void(const char *s, size_t n)> output,
+		std::mutex &outputMutex
+	);
+
 	size_t readDataset(
 		const std::vector<char> &datasetName,
 		const std::vector<char> &sharedIndex,
diff --git a/src/RdaReader/src/RdaReader.cpp b/src/RdaReader/src/RdaReader.cpp
index e9d8ae9..78129da 100644
--- a/src/RdaReader/src/RdaReader.cpp
+++ b/src/RdaReader/src/RdaReader.cpp
@@ -83,4 +83,50 @@ size_t RdaReader::readDataset(const std::vector<char> &datasetName, const std::v
 size_t RdaReader::readDataset(const std::vector<char> &datasetName, const std::vector<char> &sharedIndex, const std::vector<std::istream *> &rdas, const std::function<void(const char *s, size_t n)> output) {
 	std::mutex dummyMutex;
 	return readDataset(datasetName, sharedIndex, rdas, output, dummyMutex);
+}
+
+inline std::optional<std::vector<char>> readSharedIndex(const std::filesystem::path &filePath) {
+	std::ifstream sharedIndexFile(filePath, std::ios::binary | std::ios::ate);
+	if(!sharedIndexFile.good()) {
+		return {};
+	}
+	std::vector<char> sharedIndexData(sharedIndexFile.tellg());
+	sharedIndexFile.seekg(0, std::ios::beg);
+
+	sharedIndexFile.read(sharedIndexData.data(), sharedIndexData.size());
+	return sharedIndexData;
+}
+
+size_t RdaReader::readDataset(const std::vector<char> &datasetName, const std::filesystem::path &rootDir, const std::function<void(const char *s, size_t n)> output, std::mutex &outputMutex) {
+	const std::filesystem::path sharedIndexPath(rootDir / "sharedindex.shi");
+	std::vector<char> sharedIndexData;
+	if(auto data = readSharedIndex(sharedIndexPath)) {
+		sharedIndexData = data.value();
+	} else {
+		log("cannot find '" + sharedIndexPath.string() + "'\n");
+		return 0;
+	}
+
+	std::vector<std::ifstream> rdasIfstreams;
+	for(const std::filesystem::directory_entry &file : std::filesystem::directory_iterator(rootDir)) {
+		if(file.path().extension() == ".rda") rdasIfstreams.emplace_back(std::ifstream(file.path(), std::ios::binary));
+	}
+
+	std::vector<std::istream *> rdaRefs;
+	for(std::ifstream &stream : rdasIfstreams) {
+		rdaRefs.push_back(&stream);
+	}
+
+	if(size_t totalRead = readDataset(datasetName, sharedIndexData, rdaRefs, [](const char *s, size_t n){std::cout.write(s, n);}, outputMutex)) {
+		log("Found a total of " + std::to_string(totalRead) + " entries\n");
+		return totalRead;
+	} else {
+		log("Cannot find '" + std::string(datasetName.data()) + "' in the shared index\n");
+		return 0;
+	}
+}
+
+size_t RdaReader::readDataset(const std::vector<char> &datasetName, const std::filesystem::path &rootDir, const std::function<void(const char *s, size_t n)> output) {
+	std::mutex dummyMutex;
+	return readDataset(datasetName, rootDir, output, dummyMutex);
 }
\ No newline at end of file
diff --git a/src/rdaExtractor/src/rdaExtractor.cpp b/src/rdaExtractor/src/rdaExtractor.cpp
index afa7693..bb13fef 100644
--- a/src/rdaExtractor/src/rdaExtractor.cpp
+++ b/src/rdaExtractor/src/rdaExtractor.cpp
@@ -52,29 +52,6 @@ int main(int argc, char **argv) {
 	std::vector<char> datasetName(datesetString.begin(), datesetString.end());
 
 	const std::filesystem::path rootDirectory(argv[2]);
-	const std::filesystem::path sharedIndexPath(rootDirectory / "sharedindex.shi");
-
-	std::vector<char> sharedIndexData;
-	if(auto data = readSharedIndex(sharedIndexPath)) {
-		sharedIndexData = data.value();
-	} else {
-		std::cerr << "cannot find '" << sharedIndexPath << "'" << std::endl;
-		return 2;
-	}
-
-	std::vector<std::ifstream> rdasIfstreams;
-	for(const std::filesystem::directory_entry &file : std::filesystem::directory_iterator(rootDirectory)) {
-		if(file.path().extension() == ".rda") rdasIfstreams.emplace_back(std::ifstream(file.path(), std::ios::binary));
-	}
-
-	std::vector<std::istream *> rdaRefs;
-	for(std::ifstream &stream : rdasIfstreams) {
-		rdaRefs.push_back(&stream);
-	}
 	RdaReader rdaReader(threadedLog);
-	if(size_t totalRead = rdaReader.readDataset(datasetName, sharedIndexData, rdaRefs, [](const char *s, size_t n){std::cout.write(s, n);})) {
-		std::cerr << "Found a total of " << totalRead << " entries" << std::endl;
-	} else {
-		std::cerr << "Cannot find '" << argv[1] << "' in the shared index" << std::endl;
-	}
+	rdaReader.readDataset(datasetName, rootDirectory, [](const char *s, size_t n){std::cout.write(s, n);});
 }
\ No newline at end of file