Move file utilities into their own file

rhubarb/CMakeLists.txt

@@ -446,6 +446,8 @@ add_library(rhubarb-tools
 	src/tools/EnumConverter.h
 	src/tools/exceptions.cpp
 	src/tools/exceptions.h
+	src/tools/fileTools.cpp
+	src/tools/fileTools.h
 	src/tools/Lazy.h
 	src/tools/nextCombination.h
 	src/tools/NiceCmdLineOutput.cpp

rhubarb/src/audio/WaveFileReader.cpp

@@ -1,8 +1,8 @@
 #include <format.h>
-#include <string.h>
 #include "WaveFileReader.h"
 #include "ioTools.h"
 #include "tools/platformTools.h"
+#include "tools/fileTools.h"
 
 using std::runtime_error;
 using fmt::format;
@@ -30,27 +30,6 @@ namespace Codec {
 	constexpr int Float = 0x03;
 };
 
-std::ifstream openFile(path filePath) {
-	try {
-		std::ifstream file;
-		file.exceptions(std::ifstream::failbit | std::ifstream::badbit);
-		file.open(filePath.c_str(), std::ios::binary);
-
-		// Error messages on stream exceptions are mostly useless.
-		// Read some dummy data so that we can throw a decent exception in case the file is missing, locked, etc.
-		file.seekg(0, std::ios_base::end);
-		if (file.tellg()) {
-			file.seekg(0);
-			file.get();
-			file.seekg(0);
-		}
-
-		return std::move(file);
-	} catch (const std::ifstream::failure&) {
-		throw runtime_error(errorNumberToString(errno));
-	}
-}
-
 string codecToString(int codec);
 
 WaveFileReader::WaveFileReader(path filePath) :

rhubarb/src/tools/fileTools.cpp

@@ -0,0 +1,30 @@
+#include "fileTools.h"
+
+#include <cerrno>
+
+using boost::filesystem::path;
+
+std::ifstream openFile(path filePath) {
+	try {
+		std::ifstream file;
+		file.exceptions(std::ifstream::failbit | std::ifstream::badbit);
+		file.open(filePath.c_str(), std::ios::binary);
+
+		// Read some dummy data so that we can throw a decent exception in case the file is missing, locked, etc.
+		file.seekg(0, std::ios_base::end);
+		if (file.tellg()) {
+			file.seekg(0);
+			file.get();
+			file.seekg(0);
+		}
+
+		return std::move(file);
+	} catch (const std::ifstream::failure&) {
+		// Error messages on stream exceptions are mostly useless.
+		throw std::runtime_error(errorNumberToString(errno));
+	}
+}
+
+void throwIfNotReadable(path filePath) {
+	openFile(filePath);
+}

rhubarb/src/tools/fileTools.h

@@ -0,0 +1,7 @@
+#pragma once
+#include "platformTools.h"
+#include <fstream>
+
+std::ifstream openFile(boost::filesystem::path filePath);
+
+void throwIfNotReadable(boost::filesystem::path filePath);