Reads up to bytes_to_read bytes from the current position into vdata, and returns (success, total_read).
file_read :: (
f: File,
vdata: *void,
bytes_to_read: s64
) -> (success: bool, total_read: s64)It keeps reading until the count is met or the end is reached, so a short count with true means the end of the file (or
of a pipe whose writer closed), and 0 means it is at the end. A closed file, a null buffer or a count of 0 or less
fails with 0 bytes. A read error gives false with the bytes that did arrive. The position moves by total_read.
Parameters
- f: File
- vdata: *void
- bytes_to_read: s64
Returns
- success: bool
- total_read: s64