From a635e84d822b701916528f37d1fd13b7cacad7d0 Mon Sep 17 00:00:00 2001
From: Connor McLaughlin <stenzek@gmail.com>
Date: Tue, 12 Apr 2022 21:06:46 +1000
Subject: [PATCH] FileSystem: Add path splitting helpers

---
 common/FileSystem.cpp | 33 +++++++++++++++++++++++++++++++++
 common/FileSystem.h   |  6 ++++++
 2 files changed, 39 insertions(+)

diff --git a/common/FileSystem.cpp b/common/FileSystem.cpp
index 77cd17697b..b13b056bfd 100644
--- a/common/FileSystem.cpp
+++ b/common/FileSystem.cpp
@@ -214,6 +214,39 @@ std::string_view FileSystem::GetFileTitleFromPath(const std::string_view& path)
 	return filename.substr(0, pos);
 }
 
+std::vector<std::string_view> FileSystem::SplitWindowsPath(const std::string_view& path)
+{
+	std::vector<std::string_view> parts;
+
+	std::string::size_type start = 0;
+	std::string::size_type pos = 0;
+	while (pos < path.size())
+	{
+		if (path[pos] != '/' && path[pos] != '\\')
+		{
+			pos++;
+			continue;
+		}
+
+		// skip consecutive separators
+		if (pos != start)
+			parts.push_back(path.substr(start, pos - start));
+
+		pos++;
+		start = pos;
+	}
+
+	if (start != pos)
+		parts.push_back(path.substr(start));
+
+	return parts;
+}
+
+std::vector<std::string_view> FileSystem::SplitNativePath(const std::string_view& path)
+{
+	return StringUtil::SplitString(path, FS_OSPATH_SEPARATOR_CHARACTER, true);
+}
+
 std::vector<std::string> FileSystem::GetRootDirectoryList()
 {
 	std::vector<std::string> results;
diff --git a/common/FileSystem.h b/common/FileSystem.h
index c37d59a597..1ea3cd6208 100644
--- a/common/FileSystem.h
+++ b/common/FileSystem.h
@@ -102,6 +102,12 @@ namespace FileSystem
 	/// Returns the file title (less the extension and path) from a filename.
 	std::string_view GetFileTitleFromPath(const std::string_view& path);
 
+	/// Splits a path into its components, handling both Windows and Unix separators.
+	std::vector<std::string_view> SplitWindowsPath(const std::string_view& path);
+
+	/// Splits a path into its components, only handling native separators.
+	std::vector<std::string_view> SplitNativePath(const std::string_view& path);
+
 	/// Returns a list of "root directories" (i.e. root/home directories on Linux, drive letters on Windows).
 	std::vector<std::string> GetRootDirectoryList();