Rename compose.hpp to compose.h

1 files changed, 89 insertions, 0 deletions

diff --git a/src/compose.h b/src/compose.h
new file mode 100644
index 00000000..a7bc1154
--- /dev/null
+++ b/src/compose.h
@@ -0,0 +1,89 @@
+/*
+    Copyright (C) 2021 Carl Hetherington <cth@carlh.net>
+
+    This file is part of libdcp.
+
+    libdcp 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 2 of the License, or
+    (at your option) any later version.
+
+    libdcp 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 libdcp.  If not, see <http://www.gnu.org/licenses/>.
+
+    In addition, as a special exception, the copyright holders give
+    permission to link the code of portions of this program with the
+    OpenSSL library under certain conditions as described in each
+    individual source file, and distribute linked combinations
+    including the two.
+
+    You must obey the GNU General Public License in all respects
+    for all of the code used other than OpenSSL.  If you modify
+    file(s) with this exception, you may extend this exception to your
+    version of the file(s), but you are not obligated to do so.  If you
+    do not wish to do so, delete this exception statement from your
+    version.  If you delete this exception statement from all source
+    files in the program, then also delete it here.
+*/
+
+
+#ifndef LIBDCP_STRING_H
+#define LIBDCP_STRING_H
+
+
+#include "dcp_assert.h"
+#include "locale_convert.h"
+#include <boost/algorithm/string.hpp>
+#include <string>
+#include <vector>
+
+
+namespace dcp {
+
+
+void collect(std::vector<std::string>&);
+
+
+template <typename T, typename ...Ts>
+void collect(std::vector<std::string>& string_args, T arg, Ts... rest)
+{
+	auto const string_arg = locale_convert<std::string>(arg);
+	if (!string_arg.empty()) {
+		string_args.push_back(string_arg);
+	}
+	collect(string_args, rest...);
+}
+
+
+namespace String {
+
+
+template <typename...Ts>
+std::string compose(std::string fmt, Ts... args)
+{
+	std::vector<std::string> string_args;
+	collect(string_args, args...);
+	for (auto i = 0U; i < 10; ++i) {
+		std::string place = "%";
+		place += static_cast<char>(49 + i);
+		std::string value = i < string_args.size() ? string_args[i] : "";
+		boost::algorithm::replace_all(fmt, place, value);
+	}
+	boost::algorithm::replace_all(fmt, "%%", "%");
+	return fmt;
+}
+
+
+}
+
+
+}
+
+
+#endif
+