memmove() loses bits...

[niko]

Hi all,
I was working on bits and in the end moving them to another variabile
The original sequence is
00000000100011000000000000000000

while once moved with memmove() is

00000000000011000000000000000000

which is obviously different.

What could be the problem? Im moving bits from an unsigned to a float if
this may help.
thanx

 

[Arthur J. O'Dwyer]

Hi all,
I was working on bits and in the end moving them to another variabile

[and somehow ends up with different bits]

Post a small, compilable program that demonstrates the problem.
Also make sure to tell us the 'sizeof' all relevant types (you
mentioned unsigned short and float; how many bytes are they on
your platform?).

[If you use tabs in your source code, run it through
http://www.contrib.andrew.cmu.edu/~ajo/usenetify2.c
before posting. Otherwise it will turn out unreadable.]

-Arthur

 

[Keith Thompson]

Hi all,
I was working on bits and in the end moving them to another variabile
The original sequence is
00000000100011000000000000000000

while once moved with memmove() is

00000000000011000000000000000000

which is obviously different.

What could be the problem? Im moving bits from an unsigned to a float if
this may help.

Some (short!) sample code would be helpful, but my best guess is that
the floating-point value is being normalized. The behavior may depend
on how you're retrieving the bits, which you don't show us.

 

[Ben Pfaff]

[If you use tabs in your source code, run it through
http://www.contrib.andrew.cmu.edu/~ajo/usenetify2.c
before posting. Otherwise it will turn out unreadable.]

blp@blp:~(0)$ wget http://www.contrib.andrew.cmu.edu/~ajo/usenetify2.c
--16:06:16-- http://www.contrib.andrew.cmu.edu/~ajo/usenetify2.c
=> `usenetify2.c'
Resolving www.contrib.andrew.cmu.edu... 128.2.4.154, 128.2.4.147
Connecting to www.contrib.andrew.cmu.edu[128.2.4.154]:80... connected.
HTTP request sent, awaiting response... 404 Not Found
16:06:17 ERROR 404: Not Found.

 

[Christian Bau]

[If you use tabs in your source code, run it through
http://www.contrib.andrew.cmu.edu/~ajo/usenetify2.c
before posting. Otherwise it will turn out unreadable.]

Try

http://www.contrib.andrew.cmu.edu/~ajo/free-software/usenetify2.c

instead.

 

[Arthur J. O'Dwyer]

[If you use tabs in your source code, run it through
http://www.contrib.andrew.cmu.edu/~ajo/usenetify2.c
before posting. Otherwise it will turn out unreadable.]

Try
http://www.contrib.andrew.cmu.edu/~ajo/free-software/usenetify2.c
instead.

Yes indeed; thanks for the correction. Funny how I can't type
URLs on my own site correctly...

-Arthur