Added fopen/fread/fwrite/fgets wrapper class.

1 files changed, 78 insertions, 0 deletions

diff --git a/src/BufferedFile.h b/src/BufferedFile.h
new file mode 100644
index 00000000..66acb7ff
--- /dev/null
+++ b/src/BufferedFile.h
@@ -0,0 +1,78 @@
+/* <!-- copyright */
+/*
+ * aria2 - The high speed download utility
+ *
+ * Copyright (C) 2011 Tatsuhiro Tsujikawa
+ *
+ * This program 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.
+ *
+ * This program 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 this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * 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.
+ */
+/* copyright --> */
+#ifndef D_BUFFERED_FILE_H
+#define D_BUFFERED_FILE_H
+
+#include "common.h"
+
+#include <cstdio>
+#include <string>
+
+namespace aria2 {
+
+// This is a wrapper class for fopen/fclose/fread/fwrite/fgets.
+class BufferedFile {
+private:
+  typedef void (BufferedFile::*unspecified_bool_type)() const;
+  void good_state() const {}
+public:
+  BufferedFile(const std::string& filename, const std::string& mode);
+  ~BufferedFile();
+  // Returns true if file is opened and both ferror and feof returns
+  // 0. Otherwise returns false.
+  operator unspecified_bool_type() const;
+  // wrapper for fread. Using 1 for 2nd argument of fread.
+  size_t read(void* ptr, size_t count);
+  // wrapper for fwrite. Using 1 for 2nd argument of fwrite.
+  size_t write(const void* ptr, size_t count);
+  // wrapper for fgets
+  char* gets(char* s, int size);
+  // wrapper for fgets, but trailing '\n' is replaced with '\0'.
+  char* getsn(char* s, int size);
+  // wrapper for fclose
+  int close();
+  // Mode for reading
+  static const std::string READ;
+  // Mode for writing
+  static const std::string WRITE;
+private:
+  FILE* fp_;
+  // true when file has been opened.
+  bool open_;
+};
+
+} // namespace aria2
+
+#endif // D_BUFFERED_FILE_H