1 files changed, 23 insertions, 0 deletions
diff --git a/toolsrc/src/vcpkg_Files.cpp b/toolsrc/src/vcpkg_Files.cpp
index 49a661157..611aa7450 100644
--- a/toolsrc/src/vcpkg_Files.cpp
+++ b/toolsrc/src/vcpkg_Files.cpp
@@ -1,16 +1,24 @@
 #include "vcpkg_Files.h"
 #include <fstream>
 #include <filesystem>
+#include <regex>
 
 namespace fs = std::tr2::sys;
 
 namespace vcpkg {namespace Files
 {
+    static const std::regex FILESYSTEM_INVALID_CHARACTERS_REGEX = std::regex(R"([\/:*?"<>|])");
+
     void check_is_directory(const fs::path& dirpath)
     {
         Checks::check_throw(fs::is_directory(dirpath), "The path %s is not a directory", dirpath.string());
     }
 
+    bool has_invalid_chars_for_filesystem(const std::string s)
+    {
+        return std::regex_search(s, FILESYSTEM_INVALID_CHARACTERS_REGEX);
+    }
+
     expected<std::string> get_contents(const fs::path& file_path) noexcept
     {
         std::fstream file_stream(file_path, std::ios_base::in | std::ios_base::binary);
@@ -35,4 +43,19 @@ namespace vcpkg {namespace Files
 
         return std::move(output);
     }
+
+    fs::path find_file_recursively_up(const fs::path& starting_dir, const std::string& filename)
+    {
+        fs::path current_dir = starting_dir;
+        for (; !current_dir.empty(); current_dir = current_dir.parent_path())
+        {
+            const fs::path candidate = current_dir / filename;
+            if (fs::exists(candidate))
+            {
+                break;
+            }
+        }
+
+        return current_dir;
+    }
 }}