read_all

Tries to read buffer.length bytes from the stream into the buffer starting at buffer.

Will block during this read.

This function is similar to read, except it tries to read as many bytes as requested, only stopping on an error or end of stream.

On a successful read of buffer.length bytes, or if we reached the end of the stream, true is returned, and bytes_read is set to the number of bytes read into buffer.

If there is an error during the operation false is returned and throws is set to indicate the error status, bytes_read is updated to contain the number of bytes read into buffer before the error occurred.

Parameters:

this	a InputStream.
buffer	a buffer to read data into (which should be at least count bytes long).
bytes_read	location to store the number of bytes that was read from the stream
cancellable	optional Cancellable object, null to ignore.
count	the number of bytes that will be read from the stream

Returns:

true on success, false if there was an error