[farther OT] Re: Why Is Escaping Data Considered So Magical?

[Lawrence D'Oliveiro]

In message <mailman.136.1278040489.1673.python-list at python.org>, Rami 
Chowdhury wrote:

> On Thursday 01 July 2010 16:50:59 Lawrence D'Oliveiro wrote:
>
>> Nevertheless, it it at least self-consistent. To return to my original
>> macro:
>> 
>>     #define Descr(v) &v, sizeof v
>> 
>> As written, this works whatever the type of v: array, struct, whatever.
> 
> Doesn't seem to, sorry. Using Michael Torrie's code example, slightly
> modified...
> 
>         char *buf = malloc(512 * sizeof(char));

Again, you misunderstand the difference between a C array and a pointer. 
Study the following example, which does work, and you might grasp the point:

ldo at theon:hack> cat test.c
#include <stdio.h>

int main(int argc, char ** argv)
  {
    char buf[512];
    const int a = 2, b = 3;
    snprintf(&buf, sizeof buf, "%d + %d = %d\n", a, b, a + b);
    fprintf(stdout, buf);
    return
        0;
  } /*main*/
ldo at theon:hack> ./test
2 + 3 = 5