| markedBlock {hexView} | R Documentation |
This function creates a "markedBlock" object, which is
a description of a block of binary data. This can be used
as part of a description of a binary format.
markedBlock(marker=integer4,
switch=function(marker) { ASCIIchar })
marker |
|
switch |
A "markedBlock" object describes a block of binary data that consists
of a “marker” block containing information on further blocks.
The marker block is read first, then this block is passed
to the switch function. The switch function
can look at the contents of the marker block and decide
what sort of block should be read next. The result of the
switch function is read from the end of the marker
block. The marker block and the result of the switch
function can be any type
of "memBlock" object.
A "markedBlock" object.
Paul Murrell
memFormat
readFormat
memBlock
atomicBlock
vectorBlock
lengthBlock
mixedBlock
# A single-byte integer which dictates how many
# subsequent four-byte reals to read
markedBlock(integer1,
function(marker) {
lengthBlock(real4, blockValue(marker))
})