RE: [C400-L] Ebcdic2ascii

["Jevgeni Astanovski" <J.Astanovski@xxxxxxxxxxxx>]

Actually the fact, that count is a constant is probably the only reason for it 
to be non lvalue.
I think, that if you will remove reference to variable count from the function 
"funct", compile the program (proably you will not get an error, and run the 
program in debug mode, you will be able to understand, if count is a constant 
or not, if it is a variable, it should be in stack, if constant - in program 
code segment. I recall that i hade similar errors with pointer to string.
If you do it like:

char *astring = "ABCDEFGH" ;

then you cannot modify astring value, as it points to a constant...

but 

char astring[8] =  "ABCDEFGH" ;

works fine.

Sorry for syntax.

> -----Original Message-----
> From: Jevgeni Astanovski 
> Sent: Wednesday, August 18, 2004 7:11 PM
> To: C programming iSeries / AS400
> Subject: RE: [C400-L] Ebcdic2ascii
> 
> 
> My compiler gave Beppe's error message when I modified my 
> program like this:
> 
> void funct(char *dest, const char *srce, const size_t count)
> {                                                           
>   while(count-- != 0)                                       
>   {                                                         
>     *dest++ = 256 - (*srce++) ;                             
>   }                                                         
> }                                                           
> 
> Don't you think, that as the calling function is declared as 
> static, and count variable is defined there, compiler did 
> some wrong assumptions?
> 
> > -----Original Message-----
> > From: Bob Crothers [mailto:bob@xxxxxxxxxxxxxx]
> > Sent: Wednesday, August 18, 2004 7:07 PM
> > To: 'C programming iSeries / AS400'
> > Subject: RE: [C400-L] Ebcdic2ascii
> > 
> > 
> > It is also a good practice to have the variable on the right and the
> > constant on the left.  That way the compiler will catch the 
> > mistake of:
> > 
> > while (x = 0)
> > 
> > Eg: Single equal sign is an assignment statement...usually 
> > what is desired
> > is a == for " while x equals 0".
> > 
> > Bob
> > 
> > > -----Original Message-----
> > > From: c400-l-bounces@xxxxxxxxxxxx 
> > [mailto:c400-l-bounces@xxxxxxxxxxxx] On
> > > Behalf Of Hall, Philip
> > > Sent: Wednesday, August 18, 2004 11:01 AM
> > > To: C programming iSeries / AS400
> > > Subject: RE: [C400-L] Ebcdic2ascii
> > > 
> > > 
> > > >      0    283        |         while (count-- != 0)  á
> > > 
> > > I know this might seem simplistic, but have you tried changing the
> > > position of the variables?  i.e using while( 0 != count-- )
> > > 
> > > Perhaps the compiler is doing some (arguably, 'smart') 
> > manipulation of the
> > > storage class of the left-hand side variable in an attempt 
> > to stream line
> > > the code, which in turn makes the left-hand variable no longer a
> > > modifiable variable - which *is* a bug if it turns out to 
> > be the case.
> > > 
> > > --phil
> > > 
> > > 
> > > 
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