Operations on open files.
class virtual ro : object ... endA file opened for reading.
class virtual rw : object ... endA file opened for reading and writing.
val pread : ro -> file_offset:Optint.Int63.t -> Cstruct.t list -> intpread t ~file_offset bufs performs a single read of t at file_offset into bufs.
It returns the number of bytes read, which may be less than the space in bufs, even if more bytes are available. Use pread_exact instead if you require the buffer to be filled.
To read at the current offset, use Flow.read instead.
val pread_exact : ro -> file_offset:Optint.Int63.t -> Cstruct.t list -> unitpread_exact t ~file_offset bufs reads from t into bufs until bufs is full.
val pwrite_single : rw -> file_offset:Optint.Int63.t -> Cstruct.t list -> intpwrite_single t ~file_offset bufs performs a single write operation, writing data from bufs to location file_offset in t.
It returns the number of bytes written, which may be less than the length of bufs. In most cases, you will want to use pwrite_all instead.
val pwrite_all : rw -> file_offset:Optint.Int63.t -> Cstruct.t list -> unitpwrite_all t ~file_offset bufs writes all the data in bufs to location file_offset in t.