| LONG _llseek(hFile, lOffset, nOrigin) | |||||
| HFILE hFile; | /* file handle | */ | |||
| LONG lOffset; | /* number of bytes to move | */ | |||
| int nOrigin; | /* position to move from | */ | |||
The _llseek function repositions the pointer in a previously opened file.
hFile
Identifies the file.
lOffset
Specifies the number of bytes the pointer is to be moved.
nOrigin
Specifies the starting position and direction of the pointer. The parameter must be one of the following values:
| Value | Meaning |
| 0 | ||
| Move the file pointer lOffset bytes from the beginning of the file. | ||
| 1 | ||
| Move the file pointer lOffset bytes from its current position. | ||
| 2 | ||
| Move the file pointer lOffset bytes from the end of the file. | ||
The return value specifies the new offset of the pointer (in bytes) from the beginning of the file if the function was successful. Otherwise, the return value is -1.
When a file is initially opened, the file pointer is positioned at the beginning of the file. The _llseek function permits random access to a file's contents by moving the pointer an arbitrary amount without reading data.
This function is maintained for compatibility with previous versions of Windows. Win32 applications should use the SetFilePointer function to move a file's file pointer.
_lopen, SetFilePointer