Enum FileOpenMode
Flags to select the open mode of a File or external string.

Defined in <seqan/file.h>
Signature

Enum Values

OPEN_RDONLY
Open in read-only mode.
OPEN_WRONLY
Open in write-only mode.
OPEN_RDWR
Open for reading and writing.
OPEN_CREATE
Create the file if it does not yet exists.
OPEN_APPEND
Keep the existing data. If this flag is not given then the file is cleared in write mode.
OPEN_QUIET
Don't print any warning message if the file could not be opened.
OPEN_MASK
(Internal) Bitmask to extract the read/write open mode.
OPEN_ASYNC
(Internal) Open the file for asynchronous file access. For asynchronous file access, use the AsyncFile.
OPEN_TEMPORARY
(Internal) Open automatically delete the file after close. Use the openTemp methods to open temporary files.

Detailed Description

These flags can be combined via the | operator (bitwise OR). The defualt open mode is OPEN_RDWR | OPEN_CREATE | OPEN_APPEND.

If you omit the OPEN_APPEND flag in write mode, the file will be truncated to size 0 when opened.

Examples

Code example to test for read-only mode:

if (openMode & OPEN_MASK == OPEN_READ)
    // do something if opened in read-only mode