Add and use new File class.master

It was always a bit troubling that fopen_boost wasn't exception safe,
and this also fixes a leak where load_ratings_list would never close
the ratings file.

1 files changed, 78 insertions, 0 deletions

diff --git a/src/file.h b/src/file.h
new file mode 100644
index 00000000..e50c6005
--- /dev/null
+++ b/src/file.h
@@ -0,0 +1,78 @@
+/*
+    Copyright (C) 2022 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.
+*/
+
+
+#include <boost/filesystem/path.hpp>
+
+
+namespace dcp {
+
+
+/** A wrapper for stdio files that gives RAII and allows us to open files with
+ *  UTF-8 names on Windows.
+ */
+class File
+{
+public:
+	/** @param path Path to open
+	 *  @param mode mode flags, as for fopen(3)
+	 */
+	File(boost::filesystem::path, std::string mode);
+	~File();
+
+	File(File const&) = delete;
+	File& operator=(File const&) = delete;
+
+	operator bool() const;
+
+	/** fwrite() wrapper */
+	size_t write(const void *ptr, size_t size, size_t nmemb);
+	/** fread() wrapper */
+	size_t read(void *ptr, size_t size, size_t nmemb);
+	/** feof() wrapper */
+	int eof();
+	/** fgets() wrapper */
+	char *gets(char *s, int size);
+
+	/** Close the file; it is not necessary to call this as the
+	 *  destructor will do it if required.
+	 */
+	void close();
+
+private:
+	FILE* _file = nullptr;
+};
+
+
+}
+