🚀 go-pugleaf

In article <4jq1eq$a3c@solutions.solon.com>, jamie@csd.uwo.ca says...

[ ... ]
>   ANNOTATIONS ON K&R II

>      p. 135                 As the text states: sizeof *x is the size of the
>                             pointer not the x being pointed to.

I think this bears a bit of clarification: given a definition something like:

something *x;

sizeof(*x);

does NOT give the size of a pointer at all, it gives the size of a `something'  
I think you're trying to say that it doesn't give the size of the block 
actually pointed to by `x', which is also true.  

>      p. 119                 Note that: 1) char * is not the same as void *
>                             and 2) this qsort() is not necessarily the same
>                             as the standard library's.  (I got these points
>                             from a comment on p. 229 (question 13.8) of
>                             Steve Summit's C Programming FAQs.)

While `char *' and `void *' are not the same, they are required to have the 
same representation.  (The general idea seems to be that if you pass one in 
place of the other, it probably shouldn't cause a problem, but they never 
quite state that explicitly.  I presume this was an attempt at enforcing 
compatibility with older libraries that expected a `char *' where a `void *' 
is now indicated.)
                     
>      p. 183                 <sys/types.h> does not define size_t. It is
>                             defined in <stddef.h> (pp. 260-1).

If memory serves, under POSIX, sys/types.h is required to define size_t as 
well.  sys/* are NOT defined by the C standard at all.  size_t is required to 
be defined in string.h, stdlib.h and time.h in addition to stddef.h, for what 
little it may be worth.
    Later,
    Jerry.