file_util: Use enum instead of bool for specifing path behavior

src/common/file_util.cpp

@@ -884,12 +884,12 @@ std::string_view RemoveTrailingSlash(std::string_view path) {
     return path;
 }
 
-std::string SanitizePath(std::string_view path_, bool with_platform_slashes) {
+std::string SanitizePath(std::string_view path_, DirectorySeparator directory_separator) {
     std::string path(path_);
-    char type1 = '\\';
-    char type2 = '/';
+    char type1 = directory_separator == DirectorySeparator::BackwardSlash ? '/' : '\\';
+    char type2 = directory_separator == DirectorySeparator::BackwardSlash ? '\\' : '/';
 
-    if (with_platform_slashes) {
+    if (directory_separator == DirectorySeparator::PlatformDefault) {
 #ifdef _WIN32
         type1 = '/';
         type2 = '\\';

src/common/file_util.h

@@ -182,9 +182,12 @@ std::vector<T> SliceVector(const std::vector<T>& vector, size_t first, size_t la
     return std::vector<T>(vector.begin() + first, vector.begin() + first + last);
 }
 
+enum class DirectorySeparator { ForwardSlash, BackwardSlash, PlatformDefault };
+
 // Removes trailing slash, makes all '\\' into '/', and removes duplicate '/'. Makes '/' into '\\'
-// if windows and with_platform_slashes is true.
-std::string SanitizePath(std::string_view path, bool with_platform_slashes = false);
+// depending if directory_separator is BackwardSlash or PlatformDefault and running on windows
+std::string SanitizePath(std::string_view path,
+                         DirectorySeparator directory_separator = DirectorySeparator::ForwardSlash);
 
 // simple wrapper for cstdlib file functions to
 // hopefully will make error checking easier