InputStream classes

RandomAccessFile inherits fromInputStream and is a baseclass for:ReadableFile for reading from a file;MemoryMappedFile forthe same but with memory mapping; andBufferReader for reading from abuffer. Use these with the various table readers.

Factory

The$create() factory methods instantiate theInputStream object andtake the following arguments, depending on the subclass:

• path ForReadableFile, a character file name

• x ForBufferReader, aBuffer or an object that can bemade into a buffer viabuffer().

To instantiate aMemoryMappedFile, callmmap_open().

Methods

• $GetSize():

• $supports_zero_copy(): Logical

• $seek(position): go to that position in the stream

• $tell(): return the position in the stream

• $close(): close the stream

• $Read(nbytes): read data from the stream, either a specifiednbytes orall, ifnbytes is not provided

• $ReadAt(position, nbytes): similar to$seek(position)$Read(nbytes)

• $Resize(size): for aMemoryMappedFile that is writeable