LEADTOOLS Raster imaging C++ Class library help
| LEADTOOLS Raster Imaging C++ Class Library Help > Classes and Member Functions > LBaseFile > LBaseFile Member Functions > LBaseFile::RedirectReadCallBack |
#include "ltwrappr.h"
virtual L_UINT LBaseFile::RedirectReadCallBack(FD, pBuf, nCount)
|
L_INT FD; |
/* the file to be read */ |
|
L_CHAR * pBuf; |
/* address of buffer for read data*/ |
|
L_INT nCount; |
/* number of bytes */ |
Replaces the normal LEADTOOLS function for reading a file.
|
Parameter |
Description |
|
FD |
The file to be read. The file handle is returned by the RedirectOpenCallBack function. |
|
pBuf |
Address of a buffer that is to receive the data read from the file. |
|
nCount |
The number of bytes to be read from the file. |
Returns
|
>0 |
The number of bytes that the function read from the file. |
|
-1 |
The function failed. |
Comments
Override this function to replace the normal LEADTOOLS function for reading a file.
The Redirect input / output functions cannot be used in combination with LFile::FeedLoad, LFile::StartFeedLoad, LFile::StopFeedLoad, LMemoryFile::Load, LMemoryFile::LoadMemory, LMemoryFile::LoadMemoryTile, and LMemoryFile::Save.
|
Note: |
The Redirect input / output functions do not support Kodak PhotoCD (PCD), FlashPix (FPX), or Microsoft FAX (AWD) files. |
Required DLLs and Libraries
|
LTKRN For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application. |
See Also
|
Functions: |
|
|
Topics: |
|
|
|
Example
For an example, refer to LFile::StartFeedLoad.
