#ifndef MSP_IO_FILE_H_
#define MSP_IO_FILE_H_
+#include <stdexcept>
#include <string>
-#include "base.h"
#include "buffered.h"
#include "filtered.h"
-#include "seek.h"
+#include "handle.h"
+#include "seekable.h"
namespace Msp {
namespace IO {
+class file_not_found: public std::runtime_error
+{
+public:
+ file_not_found(const std::string &fn): std::runtime_error(fn) { }
+ ~file_not_found() throw() { }
+};
+
+class file_already_exists: public std::runtime_error
+{
+public:
+ file_already_exists(const std::string &fn): std::runtime_error(fn) { }
+ ~file_already_exists() throw() { }
+};
+
+
/**
A class for reading and writing files.
Non-blocking mode is not supported on Win32.
*/
-class File: public Base
+class File: public Seekable
{
public:
enum CreateMode
{
C_NONE = 0,
C_CREATE = 1,
- C_TRUNCATE = 2
+ C_TRUNCATE = 2,
+ C_OVERWRITE = C_CREATE+C_TRUNCATE,
+ C_EXCLUSIVE = 4,
+ C_NEW = C_CREATE+C_EXCLUSIVE
};
private:
/** Creates a new file object and opens it. If the create flag is set and
write access is requested and the file does exist, it is created. Otherwise
a missing file is an error. */
- File(const std::string &, Mode = M_READ, CreateMode = CreateMode(C_CREATE+C_TRUNCATE));
+ File(const std::string &, Mode = M_READ, CreateMode = C_OVERWRITE);
+private:
+ void platform_init(const std::string &, CreateMode);
+public:
virtual ~File();
- /** Closes the file. Any attempt to access the file after this will cause
- an exception to be thrown. */
- void close();
-
void set_block(bool);
protected:
public:
virtual void sync();
- /** Changes the read/write offset of the file. Returns the new offset. */
- virtual int seek(int, SeekType);
-
- /** Returns the current read/write offset of the file. */
- virtual int tell() const;
-
- virtual Handle get_event_handle() { return handle; }
+ virtual SeekOffset seek(SeekOffset, SeekType);
+ virtual SeekOffset tell() const;
-private:
- void check_access(Mode) const;
+ virtual const Handle &get_handle(Mode);
};
inline File::CreateMode operator|(File::CreateMode m, File::CreateMode n)
inline File::CreateMode operator~(File::CreateMode m)
{ return File::CreateMode(~static_cast<int>(m)); }
-typedef Filtered<File, Buffered> BufferedFile;
+
+class BufferedFile: public Seekable
+{
+private:
+ File file;
+ Buffered buffer;
+ SeekOffset position;
+
+public:
+ BufferedFile(const std::string &, Mode = M_READ, File::CreateMode = File::C_OVERWRITE);
+
+protected:
+ virtual unsigned do_write(const char *, unsigned);
+ virtual unsigned do_read(char *, unsigned);
+public:
+ virtual unsigned put(char);
+
+ virtual bool getline(std::string &);
+ virtual int get();
+
+ virtual SeekOffset seek(SeekOffset, SeekType);
+ virtual SeekOffset tell() const { return position; }
+};
} // namespace IO
} // namespace Msp