Move includes to a conventional include directory

1 files changed, 207 insertions, 0 deletions

diff --git a/include/raul/Path.hpp b/include/raul/Path.hpp
new file mode 100644
index 0000000..6237ddd
--- /dev/null
+++ b/include/raul/Path.hpp
@@ -0,0 +1,207 @@
+/*
+  This file is part of Raul.
+  Copyright 2007-2014 David Robillard <http://drobilla.net>
+
+  Raul is free software: you can redistribute it and/or modify it under the
+  terms of the GNU General Public License as published by the Free Software
+  Foundation, either version 3 of the License, or any later version.
+
+  Raul is distributed in the hope that it will be useful, but WITHOUT ANY
+  WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+  A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with Raul.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef RAUL_PATH_HPP
+#define RAUL_PATH_HPP
+
+#include "raul/Exception.hpp"
+#include "raul/Symbol.hpp"
+
+#include <algorithm>
+#include <string>
+
+namespace Raul {
+
+/** A restricted path of Symbols separated by, and beginning with, "/".
+ *
+ * A Path never ends with a "/", except for the root Path "/", which is the
+ * only valid single-character Path.
+ *
+ * @ingroup raul
+ */
+class Path : public std::basic_string<char> {
+public:
+	/** Attempt to construct an invalid Path. */
+	class BadPath : public Exception {
+	public:
+		explicit BadPath(const std::string& path) : Exception(path) {}
+	};
+
+	/** Construct an uninitialzed path, because the STL is annoying. */
+	Path() : std::basic_string<char>("/") {}
+
+	/** Construct a Path from a C++ string.
+	 *
+	 * This will throw an exception if `path` is invalid.  To avoid this, use
+	 * is_valid() first to check.
+	 */
+	explicit Path(const std::basic_string<char>& path)
+		: std::basic_string<char>(path)
+	{
+		if (!is_valid(path)) {
+			throw BadPath(path);
+		}
+	}
+
+	/** Construct a Path from a C string.
+	 *
+	 * This will throw an exception if `path` is invalid.  To avoid this, use
+	 * is_valid() first to check.
+	 */
+	explicit Path(const char* path)
+		: std::basic_string<char>(path)
+	{
+		if (!is_valid(path)) {
+			throw BadPath(path);
+		}
+	}
+
+	/** Copy a Path.
+	 *
+	 * Note this is faster than constructing a Path from another Path's string
+	 * since validation is unnecessary.
+	 */
+	Path(const Path& path) = default;
+
+	/** Return true iff `c` is a valid Path character. */
+	static inline bool is_valid_char(char c) {
+		return c == '/' || Symbol::is_valid_char(c);
+	}
+
+	/** Return true iff `str` is a valid Path. */
+	static inline bool is_valid(const std::basic_string<char>& str) {
+		if (str.empty() || (str[0] != '/')) {
+			return false;  // Must start with '/'
+		}
+
+		if (str != "/" && *str.rbegin() == '/') {
+			return false;  // Must not end with '/' except for the root
+		}
+
+		for (size_t i = 1; i < str.length(); ++i) {
+			if (!is_valid_char(str[i])) {
+				return false;  // All characters must be /, _, a-z, A-Z, 0-9
+			} else if (str[i - 1] == '/') {
+				if (str[i] == '/') {
+					return false;  // Must not contain "//"
+				} else if (!Symbol::is_valid_start_char(str[i])) {
+					return false;  // Invalid symbol start character (digit)
+				}
+			}
+		}
+
+		return true;
+	}
+
+	/** Return true iff this path is the root path ("/"). */
+	inline bool is_root() const { return *this == "/"; }
+
+	/** Return true iff this path is a child of `parent` at any depth. */
+	inline bool is_child_of(const Path& parent) const {
+		const std::string parent_base = parent.base();
+		return substr(0, parent_base.length()) == parent_base;
+	}
+
+	/** Return true iff this path is a parent of `child` at any depth. */
+	inline bool is_parent_of(const Path& child) const {
+		return child.is_child_of(*this);
+	}
+
+	/** Return the symbol of this path (everything after the last '/').
+	 *
+	 * This is what is called the "basename" for file paths, the "method name"
+	 * for OSC paths, and so on.  Since the root path does not have a symbol,
+	 * this does not return a Raul::Symbol but may return the empty string.
+	 */
+	inline const char* symbol() const {
+		if (!is_root()) {
+			const size_t last_sep = rfind('/');
+			if (last_sep != std::string::npos) {
+				return c_str() + last_sep + 1;
+			}
+		}
+		return "";
+	}
+
+	/** Return the parent's path.
+	 *
+	 * Calling this on the path "/" will return "/".
+	 * This is the (deepest) "container path" for OSC paths.
+	 */
+	inline Path parent() const {
+		if (is_root()) {
+			return *this;
+		} else {
+			const size_t first_sep = find('/');
+			const size_t last_sep  = find_last_of('/');
+			return (first_sep == last_sep)
+				? Path("/") : Path(substr(0, last_sep));
+		}
+	}
+
+	/** Return a child Path of this path. */
+	inline Path child(const Path& p) const {
+		return p.is_root() ? *this : Path(base() + p.substr(1));
+	}
+
+	/** Return a direct child Path of this Path with the given Symbol. */
+	inline Path child(const Raul::Symbol& symbol) const {
+		return Path(base() + symbol.c_str());
+	}
+
+	/** Return path with a trailing "/".
+	 *
+	 * The returned string is such that appending a valid Symbol to it is
+	 * guaranteed to form a valid path.
+	 */
+	inline std::string base() const {
+		if (is_root()) {
+			return *this;
+		} else {
+			return *this + '/';
+		}
+	}
+
+	/** Return the lowest common ancestor of a and b. */
+	static inline Path lca(const Path& a, const Path& b) {
+		const size_t len      = std::min(a.length(), b.length());
+		size_t       last_sep = 0;
+		for (size_t i = 0; i < len; ++i) {
+			if (a[i] == '/' && b[i] == '/') {
+				last_sep = i;
+			}
+			if (a[i] != b[i]) {
+				break;
+			}
+		}
+
+		if (last_sep <= 1) {
+			return Path("/");
+		}
+
+		return Path(a.substr(0, last_sep));
+	}
+
+	/** Return true iff `child` is equal to, or a descendant of `parent`. */
+	static inline bool descendant_comparator(const Path& parent,
+	                                         const Path& child) {
+		return (child == parent || child.is_child_of(parent));
+	}
+};
+
+} // namespace Raul
+
+#endif // RAUL_PATH_HPP