SECCryptoFile::Seek
longSECCryptoFile::Seek(longlOff, UINTnFrom)
Moves to a specified location in the file. Only usable in ECB mode.
Defined in: CRYPTFIL.CPP
Return Value
If the requested position is legal, Seek returns the new byte offset from the beginning of the file. Otherwise, the return value is undefined and a CFileException object is thrown.
Parameters
lOff
Number of bytes to move the pointer.
nFrom
Pointer movement mode. Must be one of the following values:
CFile::begin
Move the file pointer lOff bytes forward from the beginning of the file.
CFile::current
Move the file pointer lOff bytes from the current position in the file.
CFile::end
Move the file pointer backward lOff bytes from the end of the file.
Comments
Repositions the pointer in a previously opened file. The Seek function permits random access to a file's contents by moving the pointer a specified amount, absolutely or relatively. No data is actually read during the seek. Note that this method may only be used if the SECCryptoFile was opened in SECCryptoFile::ECB mode.
When a file is opened, the file pointer is positioned at offset 0, the beginning of the file.
Developer Notes
Only usable in ECB mode.
See Also
