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From Bytes to Doubles, etc. [message #12024]

Wed, 17 June 1998 00:00

Justin[1]
Messages: 4
Registered: June 1998

Junior Member

Hi, We have some legacy code that reads in large amounts of unformatted
binary data into (large) byte arrays. We know which bytes hold which
information (e.g. a double from byte nnnn to mmmm and a float from xxxx to
yyyy) but we're having trouble neatly converting the raw bytes back into
their original numbers. Since we only want to look at a few of the data it
would be wasteful reading all the data (formatted) into proper variables. We
have succeeded in writing the few bytes unformatted to a file and then
reading back formatted into variables but again this seems rather inelegant.
I suppose what we really need is a cross between READU and READS to read
unformatted from a string (byte array). It would be a breeze in C using
pointers, can anyone suggest how we might do it in IDL? Cheers,

Justin.

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