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How can I convert Big-endian to Little-endian efficiently?
2

How can I convert Big-endian to Little-endian efficiently?

How can I convert Big-endian to Little-endian efficiently?

(OP)
I have a several Long numbers that are stored in Big-endian and I want to convert then Little-endian. How can I do this efficiently?

RE: How can I convert Big-endian to Little-endian efficiently?

Hi JLMartin!

Hmmm. Two methods come to mind:

1) Call the Winsock function htonl() or ntohl() depending on the direction you want to go

2) Do something ugly (but removes dependency on Winsock) like:

     Dim s1, s2, s3, s4 as byte
     s1 = (Num And &HFF000000) / &H01000000
     s2 = (Num And &H00FF0000) / &H00010000
     s3 = (Num And &H0000FF00) / &H00000100
     s4 = Num And &H000000FF
     Num = (s4 * &H00100000) + (s3 * &H00010000) + (s2 * &H00000100) + s1

NOTE: I haven't tested this code - you might need to play around with the AND statements, but it looks good.

Chip H.

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