X-Git-Url: http://git.tdb.fi/?p=libs%2Fcore.git;a=blobdiff_plain;f=source%2Ffs%2Fpath.h;fp=source%2Ffs%2Fpath.h;h=e560d3f96c4b3e1ae5b718f5d4a724e4fc8a57c2;hp=0000000000000000000000000000000000000000;hb=af94bc926e301e9b871dc18662b4fa6e5614fdbf;hpb=fa77438b62207466c48620604c8cc34931080936

diff --git a/source/fs/path.h b/source/fs/path.h
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+++ b/source/fs/path.h
@@ -0,0 +1,95 @@
+/* $Id$
+
+This file is part of libmspfs
+Copyright © 2006-2008  Mikko Rasa, Mikkosoft Productions
+Distributed under the LGPL
+*/
+
+#ifndef MSP_FS_PATH_H_
+#define MSP_FS_PATH_H_
+
+#include <ostream>
+#include <string>
+
+namespace Msp {
+namespace FS {
+
+enum
+{
+#ifdef WIN32
+	DIRSEP = '\\'
+#else
+	DIRSEP = '/'
+#endif
+};
+
+/**
+Stores a filesystem path.  Paths are always stored in a normalized form; there
+are never any "." or ".." components in the middle of the path, and relative
+paths always begin with a single "." component or a sequence ".." components.
+*/
+class Path
+{
+public:
+	class Iterator
+	{
+		friend class Path;
+
+	private:
+		const Path &path;
+		std::string::size_type start,end;
+
+		Iterator(const Path &);
+	public:
+		Iterator    &operator++();
+		Iterator    &operator--();
+		std::string operator*() const;
+		bool        operator==(const Iterator &i) const { return (start==i.start && end==i.end); }
+		bool        operator!=(const Iterator &i) const { return !(*this==i); }
+	};
+
+private:
+	std::string path;
+
+public:
+	Path();
+	Path(const std::string &);
+	Path(const char *);
+
+	const std::string &str() const { return path; }
+
+	/// Returns the number of components in the path.
+	unsigned    size() const;
+
+	bool        empty() const { return path.empty(); }
+
+	/// Determines whether the path starts from the root directory
+	bool is_absolute() const;
+
+	/// Extracts a range of components from the path.
+	Path subpath(unsigned start, unsigned count = static_cast<unsigned>(-1)) const;
+
+	/// Concatenates this path with another one, with usual filesystem semantics
+	Path operator/(const Path &p) const;
+	Path &operator/=(const Path &);
+
+	/**
+	Extracts a single component from the path.  Negative indices count from the
+	end of the path.
+	*/
+	std::string operator[](int) const;
+
+	bool        operator==(const Path &) const;
+	Iterator    begin() const;
+	Iterator    end() const;
+private:
+	void init(const std::string &);
+	void add_component(const std::string &);
+};
+
+inline std::ostream &operator<<(std::ostream &o, const Path &p) { o<<p.str(); return o; }
+
+} // namespace FS
+} // namespace Msp
+
+#endif