The _llseek function repositions the file pointer in a previously opened file. This function is provided for compatibility with 16-bit versions of Windows. Win32-based applications should use the SetFilePointer function.
LONG _llseek(
HFILE hFile, |
// handle to file |
LONG lOffset, |
// number of bytes to move |
int iOrigin |
// position to move from |
); |
Value |
Meaning |
FILE_BEGIN |
Moves the file pointer lOffset bytes from the beginning of the file. |
FILE_CURRENT |
Moves the file pointer lOffset bytes from its current position. |
FILE_END |
Moves the file pointer lOffset bytes from the end of the file. |
If the function succeeds, the return value specifies the new offset of the pointer, in bytes, from the beginning of the file.
If the function fails, the return value is HFILE_ERROR. To get extended error information, call GetLastError.
When a file is initially opened, the file pointer is set to the beginning of the file. The _llseek function moves the pointer an arbitrary amount without reading data, which facilitates random access to the file’s contents.
See:
file: /Techref/os/win/api/win32/func/src/f00_4.htm, 3KB, , updated: 2001/6/26 10:34, local time: 2024/8/17 02:18,
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