AIX endian again Post: 18003

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Top Forums UNIX for Advanced & Expert Users AIX endian again Post 18003 by Shobhit on Friday 22nd of March 2002 12:11:17 AM

03-22-2002

Registered User

To many doubts

Hi Perderabo
I am basically trying to read a radar message following ASTERIX format(which is bit oriented) which comes on HDLC(little Endian) line.Now I have to put the bit stream coming into standard structures as per protocol.This decoding has to been implemented on Compaq(little endian) and i have to implement rather port it on HP(big endian).Since there is relative difference in LSB and MSB bits(I mean zeroth bit and 7th bit) on two platforms ,will redefining bit pattern will be a good solution to solve the problem.
##########
Also i have one general query regarding TCP and endian.Suppose I transmit from my application one long integer(say 8 bytes size) which is ruuning on littel endian and at other end on big endian system read it directly,will this cause some error.
################
Which is the ideal way or recommended way to transmit integers on network.Should we convert them to chars(one byte) and transmit 4 chars for one integer and regenerate integer using program at other end.
############
The last two question's answer will help me in my general understanding of transmission on TCP/IP and other lines.
###############
hope Perderabo you will be again kind enough to share some more knowlege of yours with all of us.
################
What difference it makes when u say TCP transmits octet and not byte?

I guess thats too many questions in one query.
sorry for that.

Last edited by Shobhit; 03-22-2002 at 01:18 AM..

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LEARN ABOUT PLAN9

xd

XD(1)							      General Commands Manual							     XD(1)

NAME

       xd - hex, octal, decimal, or ASCII dump

SYNOPSIS

       xd [ option ...	] [ -format ...  ] [ file ...  ]

DESCRIPTION

       Xd  concatenates  and  dumps  the  files (standard input by default) in one or more formats.  Groups of 16 bytes are printed in each of the
       named formats, one format per line.  Each line of output is prefixed by its address (byte offset) in the input file.   The  first  line	of
       output for each group is zero-padded; subsequent are blank-padded.

       Formats other than -c are specified by pairs of characters telling size and style, by default.  The sizes are

       1 or b	1-byte units.

       2 or w	2-byte big-endian units.

       4 or l	4-byte big-endian units.

       8 or v	8-byte big-endian units.

       The styles are

       o
       Octal.

       x
       Hexadecimal.

       d
       Decimal.

       Other options are

       -c	Format as 1x but print ASCII representations or C escape sequences where possible.

       -astyle	Print file addresses in the given style (and size 4).

       -u	(Unbuffered) Flush the output buffer after each 16-byte sequence.

       -s	Reverse (swab) the order of bytes in each group of 4 before printing.

       -r	Print repeating groups of identical 16-byte sequences as the first group followed by an asterisk.

SOURCE

       /sys/src/cmd/xd.c

SEE ALSO

       db(1)

BUGS

       The various output formats don't line up properly in the output of xd.

																	     XD(1)

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