Instance MethodSystemPackage
read(into:retryOnInterrupt:)
Reads bytes at the current file offset into a buffer.
func read(into buffer: UnsafeMutableRawBufferPointer, retryOnInterrupt: Bool = true) throws -> IntParameters
- buffer
The region of memory to read into.
- retryOnInterrupt
Whether to retry the read operation if it throws
Errno.interrupted. The default istrue. Passfalseto try only once and throw an error upon interruption.
Returns
The number of bytes that were read.
Overview
The doc://com.apple.documentation/documentation/swift/unsafemutablerawbufferpointer/3019191-count property of buffer determines the maximum number of bytes that are read into that buffer.
After reading, this method increments the file’s offset by the number of bytes read. To change the file’s offset, call the seek(offset:from:) method.
The corresponding C function is read.