1 files changed, 141 insertions, 31 deletions

diff --git a/src/fs/Traits.hxx b/src/fs/Traits.hxx
index 244ab8b5c..77317e1ee 100644
--- a/src/fs/Traits.hxx
+++ b/src/fs/Traits.hxx
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * Copyright (C) 2003-2014 The Music Player Daemon Project
  * http://www.musicpd.org
  *
  * This program is free software; you can redistribute it and/or modify
@@ -24,67 +24,153 @@
 #include "Compiler.h"
 
 #ifdef WIN32
-#include <glib.h>
+#include "util/CharUtil.hxx"
 #endif
 
 #include <string>
 
+#include <string.h>
 #include <assert.h>
 
-class Error;
-
 /**
- * This class describes the nature of a filesystem path.
+ * This class describes the nature of a native filesystem path.
  */
-struct PathTraits {
+struct PathTraitsFS {
+	typedef std::string string;
 	typedef char value_type;
-	typedef char *pointer;
-	typedef const char *const_pointer;
+	typedef value_type *pointer;
+	typedef const value_type *const_pointer;
 
 #ifdef WIN32
-	static constexpr value_type SEPARATOR_FS = '\\';
-	static constexpr char SEPARATOR_UTF8 = '/';
+	static constexpr value_type SEPARATOR = '\\';
 #else
-	static constexpr value_type SEPARATOR_FS = '/';
-	static constexpr char SEPARATOR_UTF8 = '/';
+	static constexpr value_type SEPARATOR = '/';
 #endif
 
-	static constexpr bool IsSeparatorFS(value_type ch) {
+	static constexpr bool IsSeparator(value_type ch) {
 		return
 #ifdef WIN32
 			ch == '/' ||
 #endif
-			ch == SEPARATOR_FS;
+			ch == SEPARATOR;
 	}
 
-	static constexpr bool IsSeparatorUTF8(char ch) {
-		return
+	gcc_pure gcc_nonnull_all
+	static const_pointer FindLastSeparator(const_pointer p) {
+		assert(p != nullptr);
 #ifdef WIN32
-			ch == '/' ||
+		const_pointer pos = p + GetLength(p);
+		while (p != pos && !IsSeparator(*pos))
+			--pos;
+		return IsSeparator(*pos) ? pos : nullptr;
+#else
+		return strrchr(p, SEPARATOR);
 #endif
-			ch == SEPARATOR_UTF8;
 	}
 
-	gcc_pure
-	static bool IsAbsoluteFS(const_pointer p) {
-		assert(p != nullptr);
+#ifdef WIN32
+	gcc_pure gcc_nonnull_all
+	static constexpr bool IsDrive(const_pointer p) {
+		return IsAlphaASCII(p[0]) && p[1] == ':';
+	}
+#endif
 
+	gcc_pure gcc_nonnull_all
+	static bool IsAbsolute(const_pointer p) {
+		assert(p != nullptr);
 #ifdef WIN32
-		return g_path_is_absolute(p);
-#else
-		return IsSeparatorFS(*p);
+		if (IsDrive(p) && IsSeparator(p[2]))
+			return true;
 #endif
+		return IsSeparator(*p);
 	}
 
-	gcc_pure
-	static bool IsAbsoluteUTF8(const char *p) {
+	gcc_pure gcc_nonnull_all
+	static size_t GetLength(const_pointer p) {
+		return strlen(p);
+	}
+
+	/**
+	 * Determine the "base" file name of the given native path.
+	 * The return value points inside the given string.
+	 */
+	gcc_pure gcc_nonnull_all
+	static const_pointer GetBase(const_pointer p);
+
+	/**
+	 * Determine the "parent" file name of the given native path.
+	 * As a special case, returns the string "." if there is no
+	 * separator in the given input string.
+	 */
+	gcc_pure gcc_nonnull_all
+	static string GetParent(const_pointer p);
+
+	/**
+	 * Determine the relative part of the given path to this
+	 * object, not including the directory separator.  Returns an
+	 * empty string if the given path equals this object or
+	 * nullptr on mismatch.
+	 */
+	gcc_pure gcc_nonnull_all
+	static const_pointer Relative(const_pointer base, const_pointer other);
+
+	/**
+	 * Constructs the path from the given components.
+	 * If either of the components is empty string,
+	 * remaining component is returned unchanged.
+	 * If both components are empty strings, empty string is returned.
+	 */
+	gcc_pure gcc_nonnull_all
+	static string Build(const_pointer a, size_t a_size,
+			    const_pointer b, size_t b_size);
+
+	gcc_pure gcc_nonnull_all
+	static string Build(const_pointer a, const_pointer b) {
+		return Build(a, GetLength(a), b, GetLength(b));
+	}
+};
+
+/**
+ * This class describes the nature of a MPD internal filesystem path.
+ */
+struct PathTraitsUTF8 {
+	typedef std::string string;
+	typedef char value_type;
+	typedef value_type *pointer;
+	typedef const value_type *const_pointer;
+
+	static constexpr value_type SEPARATOR = '/';
+
+	static constexpr bool IsSeparator(value_type ch) {
+		return ch == SEPARATOR;
+	}
+
+	gcc_pure gcc_nonnull_all
+	static const_pointer FindLastSeparator(const_pointer p) {
 		assert(p != nullptr);
+		return strrchr(p, SEPARATOR);
+	}
 
 #ifdef WIN32
-		return g_path_is_absolute(p);
-#else
-		return IsSeparatorUTF8(*p);
+	gcc_pure gcc_nonnull_all
+	static constexpr bool IsDrive(const_pointer p) {
+		return IsAlphaASCII(p[0]) && p[1] == ':';
+	}
 #endif
+
+	gcc_pure gcc_nonnull_all
+	static bool IsAbsolute(const_pointer p) {
+		assert(p != nullptr);
+#ifdef WIN32
+		if (IsDrive(p) && IsSeparator(p[2]))
+			return true;
+#endif
+		return IsSeparator(*p);
+	}
+
+	gcc_pure gcc_nonnull_all
+	static size_t GetLength(const_pointer p) {
+		return strlen(p);
 	}
 
 	/**
@@ -92,7 +178,7 @@ struct PathTraits {
 	 * The return value points inside the given string.
 	 */
 	gcc_pure gcc_nonnull_all
-	static const char *GetBaseUTF8(const char *p);
+	static const_pointer GetBase(const_pointer p);
 
 	/**
 	 * Determine the "parent" file name of the given UTF-8 path.
@@ -100,7 +186,31 @@ struct PathTraits {
 	 * separator in the given input string.
 	 */
 	gcc_pure gcc_nonnull_all
-	static std::string GetParentUTF8(const char *p);
+	static string GetParent(const_pointer p);
+
+	/**
+	 * Determine the relative part of the given path to this
+	 * object, not including the directory separator.  Returns an
+	 * empty string if the given path equals this object or
+	 * nullptr on mismatch.
+	 */
+	gcc_pure gcc_nonnull_all
+	static const_pointer Relative(const_pointer base, const_pointer other);
+
+	/**
+	 * Constructs the path from the given components.
+	 * If either of the components is empty string,
+	 * remaining component is returned unchanged.
+	 * If both components are empty strings, empty string is returned.
+	 */
+	gcc_pure gcc_nonnull_all
+	static string Build(const_pointer a, size_t a_size,
+			    const_pointer b, size_t b_size);
+
+	gcc_pure gcc_nonnull_all
+	static string Build(const_pointer a, const_pointer b) {
+		return Build(a, GetLength(a), b, GetLength(b));
+	}
 };
 
 #endif