1 files changed, 16 insertions, 13 deletions

diff --git a/src/filesys.h b/src/filesys.h
index 1b3659afe..c22e89b3e 100644
--- a/src/filesys.h
+++ b/src/filesys.h
@@ -40,22 +40,25 @@ struct DirListNode
 	std::string name;
 	bool dir;
 };
-std::vector<DirListNode> GetDirListing(std::string path);
+
+std::vector<DirListNode> GetDirListing(const std::string &path);
 
 // Returns true if already exists
-bool CreateDir(std::string path);
+bool CreateDir(const std::string &path);
+
+bool PathExists(const std::string &path);
 
-bool PathExists(std::string path);
+bool IsPathAbsolute(const std::string &path);
 
-bool IsDir(std::string path);
+bool IsDir(const std::string &path);
 
 bool IsDirDelimiter(char c);
 
 // Only pass full paths to this one. True on success.
 // NOTE: The WIN32 version returns always true.
-bool RecursiveDelete(std::string path);
+bool RecursiveDelete(const std::string &path);
 
-bool DeleteSingleFileOrEmptyDirectory(std::string path);
+bool DeleteSingleFileOrEmptyDirectory(const std::string &path);
 
 // Returns path to temp directory, can return "" on error
 std::string TempPath();
@@ -63,34 +66,34 @@ std::string TempPath();
 /* Multiplatform */
 
 // The path itself not included
-void GetRecursiveSubPaths(std::string path, std::vector<std::string> &dst);
+void GetRecursiveSubPaths(const std::string &path, std::vector<std::string> &dst);
 
 // Tries to delete all, returns false if any failed
 bool DeletePaths(const std::vector<std::string> &paths);
 
 // Only pass full paths to this one. True on success.
-bool RecursiveDeleteContent(std::string path);
+bool RecursiveDeleteContent(const std::string &path);
 
 // Create all directories on the given path that don't already exist.
-bool CreateAllDirs(std::string path);
+bool CreateAllDirs(const std::string &path);
 
 // Copy a regular file
-bool CopyFileContents(std::string source, std::string target);
+bool CopyFileContents(const std::string &source, const std::string &target);
 
 // Copy directory and all subdirectories
 // Omits files and subdirectories that start with a period
-bool CopyDir(std::string source, std::string target);
+bool CopyDir(const std::string &source, const std::string &target);
 
 // Check if one path is prefix of another
 // For example, "/tmp" is a prefix of "/tmp" and "/tmp/file" but not "/tmp2"
 // Ignores case differences and '/' vs. '\\' on Windows
-bool PathStartsWith(std::string path, std::string prefix);
+bool PathStartsWith(const std::string &path, const std::string &prefix);
 
 // Remove last path component and the dir delimiter before and/or after it,
 // returns "" if there is only one path component.
 // removed: If non-NULL, receives the removed component(s).
 // count: Number of components to remove
-std::string RemoveLastPathComponent(std::string path,
+std::string RemoveLastPathComponent(const std::string &path,
                std::string *removed = NULL, int count = 1);
 
 // Remove "." and ".." path components and for every ".." removed, remove