From 13559b181eec2fb72e203ff6c0c8c73df381dbd0 Mon Sep 17 00:00:00 2001
From: mrbesen <y.g.2@gmx.de>
Date: Wed, 26 Oct 2022 22:14:47 +0200
Subject: [PATCH] filesize iomanip

---
 Log.cpp  | 19 +++++++++++++++++++
 Log.h    | 14 ++++++++++++++
 test.cpp |  7 +++++++
 3 files changed, 40 insertions(+)

diff --git a/Log.cpp b/Log.cpp
index 32cd703..963a947 100644
--- a/Log.cpp
+++ b/Log.cpp
@@ -271,4 +271,23 @@ void setColoredOutput(bool enabled) {
 	dynamic_cast<ConsoleOutput&>(*outputs.at(0)).setColoredOutput(enabled); // has to exist
 }
 
+std::ostream& operator<<(std::ostream& str, const FileSize& fs) {
+	static const char PREFIX[] {' ', 'K', 'M', 'G', 'T', 'P', 'E'};
+	static const uint_fast8_t PREFIXCOUNT = 7;
+	static const uint_fast32_t FACTOR = 1000;
+	static const uint_fast32_t COMMA = 100; // nach komma stellen
+
+	uint64_t cpy = fs.fs * COMMA;
+	uint_fast8_t prefix = 0;
+	while(cpy > (FACTOR * 3 * COMMA) && prefix < PREFIXCOUNT) {
+		cpy /= FACTOR;
+		++prefix;
+	}
+
+	str << (cpy / (float) COMMA);
+	if(prefix > 0)
+		str << PREFIX[prefix];
+	return str << "B";
+}
+
 } // namespace Log
\ No newline at end of file
diff --git a/Log.h b/Log.h
index 3072eea..c68c191 100644
--- a/Log.h
+++ b/Log.h
@@ -105,6 +105,20 @@ extern std::vector<Entry::MetaFunction> entryMetaFunctions;
 std::ostream& defaultEntryMetaTime(std::ostream&, const Entry&);
 std::ostream& defaultEntryMetaLevel(std::ostream&, const Entry&);
 
+// custom io-manip
+// FileSize is a iomanip to convert a filesize (fs) into a human readable format
+class FileSize {
+public:
+	explicit FileSize(uint64_t fs) : fs(fs) {}
+	FileSize(const FileSize&) = delete;
+	FileSize& operator=(const FileSize&) = delete;
+private:
+	uint64_t fs;
+	friend std::ostream& operator<<(std::ostream& str, const FileSize& fs);
+};
+
+std::ostream& operator<<(std::ostream& str, const FileSize& fs);
+
 // copy Level values in Log namespace
 constexpr Level off = Level::off;
 constexpr Level fatal = Level::fatal;
diff --git a/test.cpp b/test.cpp
index 5dacfde..12a0dd3 100644
--- a/test.cpp
+++ b/test.cpp
@@ -83,6 +83,13 @@ int main() {
 	Log::error << "error msg @Lvl fatal; " << 42 << "; " << 3.14159;
 	Log::fatal << "fatal msg @Lvl fatal; " << 42 << "; " << 3.14159;
 
+	Log::setConsoleLogLevel(Log::Level::trace);
+	std::cout << "=== Log FileSize ===" << std::endl;
+	Log::info << 1234 << " " << Log::FileSize(1234);
+	Log::info << 123456 << " " << Log::FileSize(123456);
+	Log::info << 85241 << " " << Log::FileSize(85241);
+	Log::info << 9876543210 << " " << Log::FileSize(9876543210);
+
 	Log::stop();
 
 	return 0;