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Re: matching 'C' Data Types? [message #5158]

Sun, 22 October 1995 00:00

joseph.b.gurman
Messages: 15
Registered: October 1995

Junior Member

In article <4692eu$1to@hammer.msfc.nasa.gov>, mallozzi@ssl.msfc.nasa.gov wrote:

>> I seem to be having a problem matching a few of the C data
>> types, specifically unsigned long and unsigned short.
>
> C datatype sizes:
>
> short 2 bytes
> int 4
> float 4
> long 4
> double 8

Note that this is platform-dependent; e.g., DEC Alphas (and I assume
64-bit MIPS
machines as well) would have 8-byte longs and 16-byte(?) doubles.

>
> IDL datatype sizes:
>
> byte 1 byte
> integer 2
> float 4
> long 4
> double 8
>

Note also that (1) the byte data type is the only unsigned data type in IDL,
and (2) that IDL preserves the above across platforms (whether this is good or
bas probably depends on your application). Frankly, I hope it changes as SGI,
HP, and others finallt move to 64-bit OS's.

> Pretty sure these are correct. I was doing exactly what you are doing
> with c and IDL, but it was quite awhile ago...

Joe Gurman

--
| No time to be witty; sorry |

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[Message index]

		Re: matching 'C' Data Types? By: joseph.b.gurman on Sun, 22 October 1995 00:00
		Re: matching 'C' Data Types? By: thompson on Fri, 20 October 1995 00:00

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