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For in Macros??

I tried to include this macro in my code:
#define GET_BITS(NoOfBits,GetInThis) for(TInt i=0,GetInThis =
0x0;i<NoOfBits;i++,ByteData = ByteData << 1,GetInThis = GetInThis <<
1){ if((ByteData & 0x80) == 0x80){ GetInThis = GetInThis|0x01;} }

Sorry for the one big line.
This code gets compiled properly , but is not executing .
Can somebody point any errors in this macro.
Also is for and while i.e. bacsically iteration statements allowed in
macros.
Thanks.
--Mayur K.
Nov 14 '05 #1
2 1336
Mayur K wrote:

I tried to include this macro in my code:
#define GET_BITS(NoOfBits,GetInThis) for(TInt i=0,GetInThis =
0x0;i<NoOfBits;i++,ByteData = ByteData << 1,GetInThis = GetInThis <<
1){ if((ByteData & 0x80) == 0x80){ GetInThis = GetInThis|0x01;} }

Sorry for the one big line.


So format it properly. We won't bother.

--
Chuck F (cb********@yahoo.com) (cb********@worldnet.att.net)
Available for consulting/temporary embedded and systems.
<http://cbfalconer.home.att.net> USE worldnet address!
Nov 14 '05 #2
Mayur K wrote:
I tried to include this macro in my code:
#define GET_BITS(NoOfBits,GetInThis) for(TInt i=0,GetInThis =
0x0;i<NoOfBits;i++,ByteData = ByteData << 1,GetInThis = GetInThis <<
1){ if((ByteData & 0x80) == 0x80){ GetInThis = GetInThis|0x01;} }

Sorry for the one big line.
This code gets compiled properly , but is not executing .
Please post a short, complete, compilable program
that demonstrates the problem. Without context, it's
all but impossible to debug an isolated snippet.
Can somebody point any errors in this macro.
I can see one probable error (and several shortcomings),
but without context I can't tell for sure.
Also is for and while i.e. bacsically iteration statements allowed in
macros.


Yes. Macros can expand to almost anything in the
C language. The only things a macro cannot produce are
preprocessor directives. (And comments, and inter-token
white space, and other such non-code "formatting" elements.)

--
Er*********@sun.com

Nov 14 '05 #3

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