X-Git-Url: http://git.tdb.fi/?p=libs%2Fcore.git;a=blobdiff_plain;f=source%2Fio%2Ffile.cpp;h=805a9e8dba0072270d90a8cb695faa681e710e3a;hp=1b207a25971f960ef99fa5f4481a0be23239e38d;hb=959bb34629f786cd64f666029407e60bdd37d418;hpb=6c40658510b68788fd5ef0488b20873b6aa32938

diff --git a/source/io/file.cpp b/source/io/file.cpp
index 1b207a2..805a9e8 100644
--- a/source/io/file.cpp
+++ b/source/io/file.cpp
@@ -17,18 +17,22 @@ File::File(const string &fn, Mode m, CreateMode cm)
 {
 	if(!(m&M_RDWR))
 		throw invalid_argument("File::File mode");
-	if(cm&~(C_CREATE|C_TRUNCATE))
+	if(cm&~(C_CREATE|C_TRUNCATE|C_EXCLUSIVE))
+		throw invalid_argument("File::File create");
+	if((cm&C_EXCLUSIVE) && (!(cm&C_CREATE) || (cm&C_TRUNCATE)))
 		throw invalid_argument("File::File create");
 
 	mode = m;
 
 #ifdef WIN32
 	int flags = 0;
+	int share_flags = 0;
 	int create_flags = OPEN_EXISTING;
 
 	if(mode&M_READ)
 		flags |= GENERIC_READ;
-	else if(mode&M_WRITE)
+
+	if(mode&M_WRITE)
 	{
 		flags |= GENERIC_WRITE;
 
@@ -37,16 +41,21 @@ File::File(const string &fn, Mode m, CreateMode cm)
 		case C_NONE:     create_flags = OPEN_EXISTING; break;
 		case C_CREATE:   create_flags = OPEN_ALWAYS; break;
 		case C_TRUNCATE: create_flags = TRUNCATE_EXISTING; break;
-		case C_CREATE+C_TRUNCATE: create_flags = CREATE_ALWAYS; break;
+		case C_OVERWRITE: create_flags = CREATE_ALWAYS; break;
+		case C_NEW:      create_flags = CREATE_NEW; break;
 		}
 	}
+	else
+		share_flags = FILE_SHARE_READ;
 
-	*handle = CreateFile(fn.c_str(), flags, 0, 0, create_flags, FILE_ATTRIBUTE_NORMAL, 0);
+	*handle = CreateFile(fn.c_str(), flags, share_flags, 0, create_flags, FILE_ATTRIBUTE_NORMAL, 0);
 	if(!handle)
 	{
 		int err = GetLastError();
 		if(err==ERROR_FILE_NOT_FOUND)
 			throw file_not_found(fn);
+		else if(err==ERROR_FILE_EXISTS)
+			throw file_already_exists(fn);
 		else
 			throw system_error(format("CreateFile(%s)", fn), err);
 	}
@@ -66,6 +75,8 @@ File::File(const string &fn, Mode m, CreateMode cm)
 			flags |= O_CREAT;
 		if(cm&C_TRUNCATE)
 			flags |= O_TRUNC;
+		if(cm&C_EXCLUSIVE)
+			flags |= O_EXCL;
 	}
 	if(mode&M_APPEND)
 		flags |= O_APPEND;
@@ -78,6 +89,8 @@ File::File(const string &fn, Mode m, CreateMode cm)
 		int err = errno;
 		if(err==ENOENT)
 			throw file_not_found(fn);
+		else if(err==EEXIST)
+			throw file_already_exists(fn);
 		else
 			throw system_error(format("open(%s)", fn), err);
 	}
@@ -86,26 +99,12 @@ File::File(const string &fn, Mode m, CreateMode cm)
 
 File::~File()
 {
-	close();
-}
-
-void File::close()
-{
-	if(!handle)
-		return;
-
 	signal_flush_required.emit();
-
 	sys_close(handle);
-
-	handle = Handle();
-	signal_closed.emit();
 }
 
 void File::set_block(bool b)
 {
-	check_access(M_NONE);
-
 	mode = (mode&~M_NONBLOCK);
 	if(b)
 		mode = (mode|M_NONBLOCK);
@@ -139,10 +138,7 @@ unsigned File::do_read(char *buf, unsigned size)
 
 	unsigned ret = sys_read(handle, buf, size);
 	if(ret==0)
-	{
-		eof_flag = true;
-		signal_end_of_file.emit();
-	}
+		set_eof();
 
 	return ret;
 }
@@ -156,49 +152,24 @@ void File::sync()
 #endif
 }
 
-unsigned File::seek(int off, SeekType st)
+SeekOffset File::seek(SeekOffset off, SeekType type)
 {
-	check_access(M_NONE);
-
 	signal_flush_required.emit();
-
-	int type = sys_seek_type(st);
-#ifdef WIN32
-	DWORD ret = SetFilePointer(*handle, off, 0, type);
-	if(ret==INVALID_SET_FILE_POINTER)
-		throw system_error("SetFilePointer");
-#else
-	off_t ret = lseek(*handle, off, type);
-	if(ret==(off_t)-1)
-		throw system_error("lseek");
-#endif
-
+	off = sys_seek(handle, off, type);
 	eof_flag = false;
 
-	return ret;
+	return off;
 }
 
-unsigned File::tell() const
+SeekOffset File::tell() const
 {
-	check_access(M_NONE);
-
-#ifdef WIN32
-	DWORD ret = SetFilePointer(*handle, 0, 0, FILE_CURRENT);
-	if(ret==INVALID_SET_FILE_POINTER)
-		throw system_error("SetFilePointer");
-#else
-	off_t ret = lseek(*handle, 0, SEEK_CUR);
-	if(ret==(off_t)-1)
-		throw system_error("lseek");
-#endif
-
-	return ret;
+	return sys_seek(const_cast<Handle &>(handle), 0, S_CUR);
 }
 
-void File::check_access(Mode m) const
+const Handle &File::get_handle(Mode m)
 {
-	if(!handle || (m && !(mode&m)))
-		throw invalid_access(m);
+	check_access(m);
+	return handle;
 }
 
 } // namespace IO