Diff: api/FileHandle.h

Revision:

10:3bc89ef62ce7

Parent:

9:0ce32e54c9a7

Child:

13:0645d8841f51

--- a/api/FileHandle.h	Mon Jun 10 16:03:00 2013 +0100
+++ b/api/FileHandle.h	Fri Jun 14 17:49:17 2013 +0100
@@ -1,119 +1,119 @@
-/* mbed Microcontroller Library
- * Copyright (c) 2006-2013 ARM Limited
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-#ifndef MBED_FILEHANDLE_H
-#define MBED_FILEHANDLE_H
-
-typedef int FILEHANDLE;
-
-#include <stdio.h>
-
-#if defined(__ARMCC_VERSION) || defined(__ICCARM__)
-typedef int ssize_t;
-typedef long off_t;
-
-#else
-#   include <sys/types.h>
-#endif
-
-namespace mbed {
-
-/** An OO equivalent of the internal FILEHANDLE variable
- *  and associated _sys_* functions.
- *
- * FileHandle is an abstract class, needing at least sys_write and
- *  sys_read to be implmented for a simple interactive device.
- *
- * No one ever directly tals to/instanciates a FileHandle - it gets
- *  created by FileSystem, and wrapped up by stdio.
- */
-class FileHandle {
-
-public:
-    /** Write the contents of a buffer to the file
-     *
-     *  @param buffer the buffer to write from
-     *  @param length the number of characters to write
-     *
-     *  @returns
-     *  The number of characters written (possibly 0) on success, -1 on error.
-     */
-    virtual ssize_t write(const void* buffer, size_t length) = 0;
-
-    /** Close the file
-     *
-     *  @returns
-     *  Zero on success, -1 on error.
-     */
-    virtual int close() = 0;
-
-    /** Function read
-     *  Reads the contents of the file into a buffer
-     *
-     *  @param buffer the buffer to read in to
-     *  @param length the number of characters to read
-     *
-     *  @returns
-     *  The number of characters read (zero at end of file) on success, -1 on error.
-     */
-    virtual ssize_t read(void* buffer, size_t length) = 0;
-
-    /** Check if the handle is for a interactive terminal device.
-     * If so, line buffered behaviour is used by default
-     *
-     *  @returns
-     *    1 if it is a terminal,
-     *    0 otherwise
-     */
-    virtual int isatty() = 0;
-
-    /** Move the file position to a given offset from a given location.
-     *
-     *  @param offset The offset from whence to move to
-     *  @param whence SEEK_SET for the start of the file, SEEK_CUR for the
-     *   current file position, or SEEK_END for the end of the file.
-     *
-     *  @returns
-     *    new file position on success,
-     *    -1 on failure or unsupported
-     */
-    virtual off_t lseek(off_t offset, int whence) = 0;
-
-    /** Flush any buffers associated with the FileHandle, ensuring it
-     *  is up to date on disk
-     *
-     *  @returns
-     *    0 on success or un-needed,
-     *   -1 on error
-     */
-    virtual int fsync() = 0;
-
-    virtual off_t flen() {
-        /* remember our current position */
-        off_t pos = lseek(0, SEEK_CUR);
-        if(pos == -1) return -1;
-        /* seek to the end to get the file length */
-        off_t res = lseek(0, SEEK_END);
-        /* return to our old position */
-        lseek(pos, SEEK_SET);
-        return res;
-    }
-
-    virtual ~FileHandle();
-};
-
-} // namespace mbed
-
-#endif
+/* mbed Microcontroller Library
+ * Copyright (c) 2006-2013 ARM Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#ifndef MBED_FILEHANDLE_H
+#define MBED_FILEHANDLE_H
+
+typedef int FILEHANDLE;
+
+#include <stdio.h>
+
+#if defined(__ARMCC_VERSION) || defined(__ICCARM__)
+typedef int ssize_t;
+typedef long off_t;
+
+#else
+#   include <sys/types.h>
+#endif
+
+namespace mbed {
+
+/** An OO equivalent of the internal FILEHANDLE variable
+ *  and associated _sys_* functions.
+ *
+ * FileHandle is an abstract class, needing at least sys_write and
+ *  sys_read to be implmented for a simple interactive device.
+ *
+ * No one ever directly tals to/instanciates a FileHandle - it gets
+ *  created by FileSystem, and wrapped up by stdio.
+ */
+class FileHandle {
+
+public:
+    /** Write the contents of a buffer to the file
+     *
+     *  @param buffer the buffer to write from
+     *  @param length the number of characters to write
+     *
+     *  @returns
+     *  The number of characters written (possibly 0) on success, -1 on error.
+     */
+    virtual ssize_t write(const void* buffer, size_t length) = 0;
+
+    /** Close the file
+     *
+     *  @returns
+     *  Zero on success, -1 on error.
+     */
+    virtual int close() = 0;
+
+    /** Function read
+     *  Reads the contents of the file into a buffer
+     *
+     *  @param buffer the buffer to read in to
+     *  @param length the number of characters to read
+     *
+     *  @returns
+     *  The number of characters read (zero at end of file) on success, -1 on error.
+     */
+    virtual ssize_t read(void* buffer, size_t length) = 0;
+
+    /** Check if the handle is for a interactive terminal device.
+     * If so, line buffered behaviour is used by default
+     *
+     *  @returns
+     *    1 if it is a terminal,
+     *    0 otherwise
+     */
+    virtual int isatty() = 0;
+
+    /** Move the file position to a given offset from a given location.
+     *
+     *  @param offset The offset from whence to move to
+     *  @param whence SEEK_SET for the start of the file, SEEK_CUR for the
+     *   current file position, or SEEK_END for the end of the file.
+     *
+     *  @returns
+     *    new file position on success,
+     *    -1 on failure or unsupported
+     */
+    virtual off_t lseek(off_t offset, int whence) = 0;
+
+    /** Flush any buffers associated with the FileHandle, ensuring it
+     *  is up to date on disk
+     *
+     *  @returns
+     *    0 on success or un-needed,
+     *   -1 on error
+     */
+    virtual int fsync() = 0;
+
+    virtual off_t flen() {
+        /* remember our current position */
+        off_t pos = lseek(0, SEEK_CUR);
+        if(pos == -1) return -1;
+        /* seek to the end to get the file length */
+        off_t res = lseek(0, SEEK_END);
+        /* return to our old position */
+        lseek(pos, SEEK_SET);
+        return res;
+    }
+
+    virtual ~FileHandle();
+};
+
+} // namespace mbed
+
+#endif