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Chris
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 Posted: Sun Oct 19, 2003 2:06 am Post subject: ntohs? htons? |
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Hi
I have tried looking for these functions Ntohs (Network To Host Short) and
htons(Host to Network Short) functions in Java but can't find any. Is there
a way to implement this function?
Thanks
Chris
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John McGrath [TeamB]
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| Posted: Sun Oct 19, 2003 10:55 pm Post subject: Re: ntohs? htons? |
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On 10/18/2003 at 10:06:55 PM, Chris wrote:
| Quote: | I have tried looking for these functions Ntohs (Network To Host
Short) and htons(Host to Network Short) functions in Java but can't
find any. Is there a way to implement this function?
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Can you be more specific about what you are trying to do?
When you write numeric values to streams, the standard Java classes
always use network order, so I doubt that you really need these methods.
--
Regards,
John McGrath [TeamB]
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Before sending me e-mail, please read:
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Tor Iver Wilhelmsen
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| Posted: Mon Oct 20, 2003 6:50 am Post subject: Re: ntohs? htons? |
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"Chris" <cchuah (AT) tycoint (DOT) com> writes:
| Quote: | I have tried looking for these functions Ntohs (Network To Host
Short) and htons(Host to Network Short) functions in Java but can't
find any. Is there a way to implement this function?
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They are not necessary: The Java language defines byte ordering in a
way to be the same as network byte ordering. So the byte ordering
problems that those functions seek to fix are nonexistent.
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Shankar Unni
Guest
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| Posted: Mon Oct 20, 2003 8:19 pm Post subject: Re: ntohs? htons? |
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John McGrath [TeamB] wrote:
| Quote: | Can you be more specific about what you are trying to do?
When you write numeric values to streams, the standard Java classes
always use network order, so I doubt that you really need these methods.
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Perhaps he already has a binary stream from somewhere, and wants to
interpret a sequence of 2 bytes as a short.
Answer:
a. write your own routine that can take two bytes and return a short
(and does all the shifting and or'ing), or
b. use java.io.DataInputStream.
byte[] bytes = .. some binary data ..
DataInputStream is =
new DataInputStream(new ByteArrayInputStream(bytes));
..
// call is.read{Short,Long,UnsignedShort,...}()
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