First import

src/pathname.cpp

@@ -0,0 +1,77 @@
+/* Copyright 2015, Michele Santullo
+ * This file is part of "dindexer".
+ *
+ * "dindexer" 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
+ * (at your option) any later version.
+ *
+ * "dindexer" 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 "dindexer".  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "pathname.hpp"
+#include <algorithm>
+#include <cstring>
+
+namespace din {
+	namespace {
+		void split_path (std::vector<std::string>* parOut, const char* parPath, std::size_t parLen) {
+			parOut->clear();
+			const char* from = parPath;
+			const char* next;
+			while (parPath + parLen != (next = std::find(from, parPath + parLen, '/'))) {
+				if (next != from) {
+					parOut->push_back(std::string(from, next));
+					from = next;
+				}
+				++from;
+			}
+			if (next != from) {
+				parOut->push_back(std::string(from, next));
+			}
+		}
+	} //unnamed namespace
+
+	PathName::PathName (const char* parPath) {
+		if (not parPath) {
+			m_absolute = false;
+		}
+		else {
+			m_absolute = ('/' == *parPath);
+			split_path(&m_atoms, parPath, std::strlen(parPath));
+		}
+	}
+
+	std::string PathName::path() const {
+		if (m_atoms.empty()) {
+			if (m_absolute) {
+				return std::string("/");
+			}
+			else {
+				return std::string("");
+			}
+		}
+
+		std::size_t reserve = (m_absolute ? 1 : 0);
+		for (const auto& itm : m_atoms) {
+			reserve += itm.size();
+		}
+		reserve += m_atoms.size() - 1;
+
+		std::string out;
+		out.reserve(reserve);
+		const char* slash = (m_absolute ? "/" : "");
+		for (const auto& itm : m_atoms) {
+			out += slash;
+			out += itm;
+			slash = "/";
+		}
+		return std::move(out);
+	}
+} //namespace din