Return a unique_ptr from agi::io::Open

aegisub/libaegisub/common/io.cpp

@@ -30,16 +30,15 @@
 namespace agi {
 	namespace io {
 
-std::ifstream* Open(fs::path const& file, bool binary) {
+std::unique_ptr<std::ifstream> Open(fs::path const& file, bool binary) {
 	LOG_D("agi/io/open/file") << file;
 	acs::CheckFileRead(file);
 
-	auto stream = new boost::filesystem::ifstream(file, (binary ? std::ios::binary : std::ios::in));
+	std::unique_ptr<std::ifstream> stream(
+		new boost::filesystem::ifstream(file, (binary ? std::ios::binary : std::ios::in)));
 
-	if (stream->fail()) {
-		delete stream;
+	if (stream->fail())
 		throw IOFatal("Unknown fatal error as occurred");
-	}
 
 	return stream;
 }

aegisub/libaegisub/common/json.cpp

@@ -27,14 +27,13 @@
 #include "libaegisub/fs.h"
 #include "libaegisub/io.h"
 #include "libaegisub/log.h"
+#include "libaegisub/util.h"
 
 namespace agi {
 	namespace json_util {
 
-json::UnknownElement parse(std::istream *stream) {
+json::UnknownElement parse(std::unique_ptr<std::istream> stream) {
 	try {
-		std::unique_ptr<std::istream> stream_deleter(stream);
-
 		json::UnknownElement root;
 		json::Reader::Read(root, *stream);
 		return root;
@@ -57,15 +56,15 @@ json::UnknownElement file(agi::fs::path const& file, const std::string &default_
 	}
 	catch (fs::FileNotFound const&) {
 		// Not an error
-		return parse(new std::istringstream(default_config));
+		return parse(util::make_unique<std::istringstream>(default_config));
 	}
 	catch (json::Exception&) {
 		// Already logged in parse
-		return parse(new std::istringstream(default_config));
+		return parse(util::make_unique<std::istringstream>(default_config));
 	}
 	catch (agi::Exception& e) {
 		LOG_E("json/file") << "Unexpected error when reading config file " << file << ": " << e.GetMessage();
-		return parse(new std::istringstream(default_config));
+		return parse(util::make_unique<std::istringstream>(default_config));
 	}
 }
 

aegisub/libaegisub/common/vfr.cpp

@@ -198,9 +198,9 @@ Framerate::Framerate(fs::path const& filename)
 : denominator(default_denominator)
 , numerator(0)
 {
-	scoped_ptr<std::ifstream> file(agi::io::Open(filename));
-	std::string encoding = agi::charset::Detect(filename);
-	std::string line = *line_iterator<std::string>(*file, encoding);
+	auto file = agi::io::Open(filename);
+	auto encoding = agi::charset::Detect(filename);
+	auto line = *line_iterator<std::string>(*file, encoding);
 	if (line == "# timecode format v2") {
 		copy(line_iterator<int>(*file, encoding), line_iterator<int>(), back_inserter(timecodes));
 		SetFromTimecodes();
@@ -218,7 +218,7 @@ Framerate::Framerate(fs::path const& filename)
 
 void Framerate::Save(fs::path const& filename, int length) const {
 	agi::io::Save file(filename);
-	std::ofstream &out = file.Get();
+	auto &out = file.Get();
 
 	out << "# timecode format v2\n";
 	boost::copy(timecodes, std::ostream_iterator<int>(out, "\n"));

aegisub/libaegisub/include/libaegisub/io.h

@@ -21,6 +21,7 @@
 
 #include <boost/filesystem/path.hpp>
 #include <iosfwd>
+#include <memory>
 
 namespace agi {
 	namespace io {
@@ -28,7 +29,7 @@ namespace agi {
 DEFINE_BASE_EXCEPTION_NOINNER(IOError, Exception)
 DEFINE_SIMPLE_EXCEPTION_NOINNER(IOFatal, IOError, "io/fatal")
 
-std::ifstream* Open(fs::path const& file, bool binary = false);
+std::unique_ptr<std::ifstream> Open(fs::path const& file, bool binary = false);
 
 class Save {
 	std::ofstream *fp;

aegisub/libaegisub/include/libaegisub/json.h

@@ -20,13 +20,15 @@
 #include <libaegisub/cajun/elements.h>
 #include <libaegisub/fs_fwd.h>
 
+#include <memory>
+
 namespace agi {
 	namespace json_util {
 
 /// Parse a JSON stream.
-/// @param stream JSON stream, this is deleted internally.
+/// @param stream JSON stream to parse
 /// @return json::UnknownElement
-json::UnknownElement parse(std::istream *stream);
+json::UnknownElement parse(std::unique_ptr<std::istream> stream);
 
 /// Parse a JSON file.
 /// @param file Path JSON to file

aegisub/libaegisub/include/libaegisub/util.h

@@ -69,5 +69,15 @@ namespace agi {
 	/// @param name New name for the thread
 	void SetThreadName(const char *name);
 
+	template<typename T>
+	std::unique_ptr<T> make_unique() {
+		return std::unique_ptr<T>(new T);
+	}
+
+	template<typename T, typename A1>
+	std::unique_ptr<T> make_unique(A1&& a1) {
+		return std::unique_ptr<T>(new T(std::forward<A1>(a1)));
+	}
+
 	} // namespace util
 } // namespace agi

aegisub/src/toolbar.cpp

@@ -31,6 +31,7 @@
 #include <libaegisub/json.h>
 #include <libaegisub/log.h>
 #include <libaegisub/signal.h>
+#include <libaegisub/util.h>
 
 #include <boost/algorithm/string/join.hpp>
 #include <sstream>
@@ -43,7 +44,7 @@ namespace {
 	json::Object const& get_root() {
 		static json::Object root;
 		if (root.empty())
-			root = agi::json_util::parse(new std::istringstream(GET_DEFAULT_CONFIG(default_toolbar)));
+			root = agi::json_util::parse(agi::util::make_unique<std::istringstream>(GET_DEFAULT_CONFIG(default_toolbar)));
 		return root;
 	}