X-Git-Url: http://git.tdb.fi/?p=libs%2Fcore.git;a=blobdiff_plain;f=source%2Fio%2Ffile.h;h=5fb0353211b2e99d23384afa2924e87ee78acc10;hp=cd547b37545cb23b6f0c3842c512a7cf13847905;hb=8642ac1b4478419630911a51a53fe8ef5fb46647;hpb=e4afb5edb0b7834ef4872218c99207e6b589e9ce

diff --git a/source/io/file.h b/source/io/file.h
index cd547b3..5fb0353 100644
--- a/source/io/file.h
+++ b/source/io/file.h
@@ -17,6 +17,12 @@ public:
 	file_not_found(const std::string &fn): std::runtime_error(fn) { }
 };
 
+class 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.
@@ -30,7 +36,10 @@ public:
 	{
 		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:
@@ -40,7 +49,7 @@ 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));
+	File(const std::string &, Mode = M_READ, CreateMode = C_OVERWRITE);
 	virtual ~File();
 
 	void set_block(bool);
@@ -55,8 +64,7 @@ public:
 	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)