Move file length check to separate function

inferno/src/inferno/io/file.cpp

@@ -9,19 +9,16 @@ namespace Inferno {
 	std::string File::read(const std::string &path)
 	{
 		// Create input stream object and open file
-		std::ifstream file(path);
-		ASSERT(file.is_open(), "File could not open: '{}'", path);
+		std::ifstream ifstream(path);
+		ASSERT(ifstream.is_open(), "File could not open '{}'", path);
 
 		// Check if file exists
-		if (!file.is_open()) {
+		if (!ifstream.is_open()) {
 			return nullptr;
 		}
 
 		// Get length of the file
-		file.seekg(0, std::ios::end);
-		int length = file.tellg();
-		file.seekg(0, std::ios::beg);
-		ASSERT(length != -1, "File could not determine length: '{}'", path);
+		int32_t length = File::length(path, ifstream);
 
 		// Check for valid file length
 		if (length == -1) {
@@ -32,11 +29,21 @@ namespace Inferno {
 		auto buffer = std::make_unique<char[]>(length);
 
 		// Fill buffer with file contents
-		file.read(buffer.get(), length);
-		file.close();
+		ifstream.read(buffer.get(), length);
+		ifstream.close();
 
 		// Create string from the buffer and return
 		return std::string(buffer.get(), length);
 	}
 
+	int32_t File::length(const std::string& path, std::ifstream& ifstream)
+	{
+		ifstream.seekg(0, std::ios::end);
+		int32_t length = ifstream.tellg();
+		ifstream.seekg(0, std::ios::beg);
+		ASSERT(length != -1, "File could not determine length '{}'", path);
+
+		return length;
+	}
+
 }

inferno/src/inferno/io/file.h

@@ -14,6 +14,7 @@ namespace Inferno {
 	class File {
 	public:
 		static std::string read(const std::string& path);
+		static int32_t length(const std::string& path, std::ifstream& ifstream);
 
 		template<typename T>
 		static void ioRead(T& t, const std::string& path)