Add move semantics to Variant

[libs/core.git] / source / io / file.h

diff --git a/source/io/file.h b/source/io/file.h
index ed0a3f8336ac42ff0237e2cfcb4e95d2f7b97d07..2af56ae67b2264913dcc3fa376ba5cde023c63b5 100644 (file)
--- a/source/io/file.h
+++ b/source/io/file.h
@@ -3,34 +3,43 @@
 
 #include <stdexcept>
 #include <string>
+#include <msp/core/mspcore_api.h>
 #include "buffered.h"
-#include "filtered.h"
 #include "handle.h"
 #include "seekable.h"
 
 namespace Msp {
 namespace IO {
 
-class file_not_found: public std::runtime_error
+class MSPCORE_API file_not_found: public std::runtime_error
 {
 public:
        file_not_found(const std::string &fn): std::runtime_error(fn) { }
 };
 
+class MSPCORE_API file_already_exists: public std::runtime_error
+{
+public:
+       file_already_exists(const std::string &fn): std::runtime_error(fn) { }
+};
+
 
 /**
 A class for reading and writing files.
 
 Non-blocking mode is not supported on Win32.
 */
-class File: public Seekable
+class MSPCORE_API 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:
@@ -40,27 +49,26 @@ public:
        /** 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));
-       virtual ~File();
-
-       /** Closes the file.  Any attempt to access the file after this will cause
-       an exception to be thrown. */
-       void close();
+       File(const std::string &, Mode = M_READ, CreateMode = C_OVERWRITE);
+private:
+       void platform_init(const std::string &, CreateMode);
+public:
+       ~File() override;
 
-       void set_block(bool);
+       void set_block(bool) override;
+       void set_inherit(bool) override;
 
 protected:
-       virtual unsigned do_write(const char *, unsigned);
-       virtual unsigned do_read(char *, unsigned);
+       std::size_t do_write(const char *, std::size_t) override;
+       std::size_t do_read(char *, std::size_t) override;
 
 public:
-       virtual void sync();
+       void sync();
 
-       virtual unsigned seek(int, SeekType);
-       virtual unsigned tell() const;
+       SeekOffset seek(SeekOffset, SeekType) override;
+       SeekOffset tell() const override;
 
-private:
-       void check_access(Mode) const;
+       const Handle &get_handle(Mode) override;
 };
 
 inline File::CreateMode operator|(File::CreateMode m, File::CreateMode n)
@@ -72,7 +80,34 @@ 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 MSPCORE_API BufferedFile: public Seekable
+{
+private:
+       File file;
+       Buffered buffer;
+       SeekOffset position;
+
+public:
+       BufferedFile(const std::string &, Mode = M_READ, File::CreateMode = File::C_OVERWRITE);
+
+       void set_block(bool) override;
+       void set_inherit(bool) override;
+
+protected:
+       std::size_t do_write(const char *, std::size_t) override;
+       std::size_t do_read(char *, std::size_t) override;
+public:
+       std::size_t put(char) override;
+
+       bool getline(std::string &) override;
+       int get() override;
+
+       const Handle &get_handle(Mode) override;
+
+       SeekOffset seek(SeekOffset, SeekType) override;
+       SeekOffset tell() const override { return position; }
+};
 
 } // namespace IO
 } // namespace Msp