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, 106 insertions, 0 deletions

diff --git a/src/file.cc b/src/file.cc
new file mode 100644
index 00000000..fceb905b
--- /dev/null
+++ b/src/file.cc
@@ -0,0 +1,106 @@
+/*
+    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 "dcp_assert.h"
+#include "file.h"
+
+
+using namespace dcp;
+
+
+File::~File()
+{
+	close();
+}
+
+
+File::File(boost::filesystem::path path, std::string mode)
+{
+#ifdef LIBDCP_WINDOWS
+	std::wstring mode_wide(mode.begin(), mode.end());
+	/* c_str() here should give a UTF-16 string */
+        _file = _wfopen(path.c_str(), mode_wide.c_str());
+#else
+        _file = fopen(path.c_str(), mode.c_str());
+#endif
+}
+
+
+void
+File::close()
+{
+	if (_file) {
+		fclose(_file);
+		_file = nullptr;
+	}
+}
+
+
+size_t
+File::write(const void *ptr, size_t size, size_t nmemb)
+{
+	DCP_ASSERT(_file);
+	return fwrite(ptr, size, nmemb, _file);
+}
+
+
+size_t
+File::read(void *ptr, size_t size, size_t nmemb)
+{
+	DCP_ASSERT(_file);
+	return fread(ptr, size, nmemb, _file);
+}
+
+
+int
+File::eof()
+{
+	DCP_ASSERT(_file);
+	return feof(_file);
+}
+
+
+char *
+File::gets(char *s, int size)
+{
+	DCP_ASSERT(_file);
+	return fgets(s, size, _file);
+}
+
+
+File::operator bool() const
+{
+	return _file != nullptr;
+}
+