Some C++20 format functions.

Author: lordnn

Source/FreeImage/Plugin.cpp

@@ -34,6 +34,7 @@
 #else
 #include <ctype.h>
 #endif // _WIN32
+#include <format>
 
 #include <filesystem>
 
@@ -787,9 +788,7 @@ namespace {
 
 	std::filesystem::path MakeRandomSuffix()
 	{
-		std::stringstream strs{};
-		strs << ".fitmp" << std::hex << static_cast<uint32_t>(std::rand());
-		return strs.str();
+		return std::format(".fitmp{:x}", static_cast<uint32_t>(std::rand()));
 	}
 
 

Source/Metadata/FIRational.cpp

@@ -19,6 +19,7 @@
 // Use at your own risk!
 // ==========================================================
 
+#include <format>
 #include "FreeImage.h"
 #include "Utilities.h"
 #include "FIRational.h"
@@ -164,11 +165,11 @@ FIBOOL FIRational::isInteger() {
 
 /// Convert as "numerator/denominator"
 std::string FIRational::toString() {
-	std::ostringstream s;
+	std::string s;
 	if (isInteger()) {
-		s << intValue();
+		s = std::to_string(intValue());
 	} else {
-		s << _numerator << "/" << _denominator;
+        s = std::format("{}/{}", _numerator, _denominator);
 	}
-	return s.str();
+	return s;
 }