Replace function or define by the text itself

Question

How can I replace all occurence of

check_free_set_to_null(&pointer)

by

if (pointer)
{
    free(pointer)
    printf(pointer have been freed)
}
else
{
    printf(pointer couldnt had been freed)
    return (1)
}

maybe using some sort of

{1} = check_free_set_to_null(CONTENT)

  if ({1})
    {
        free({1})
        printf({1} have been freed)
    }
    else
    {
        printf({1} couldnt had been freed)
        return (1)
    }

how could I do that ? (take note thats its not exactly what that have to be replaced, its just an example) Im not looking for the compiler to interpret it as multiple line, im looking for modifying the file.

Note: a check of `if (pointer)` is not needed before calling `free(pointer)`. `pointer = NULL; free(pointer);` is OK. — chux - Reinstate Monica, Jul 02 '17 at 16:27
@tilz0R Simply short demo code. `free(NULL);` is OK. OP's need for `if (pointer)` before `free()` is dubious. — chux - Reinstate Monica, Jul 02 '17 at 17:25
Calling `free` on `NULL` ptr is fine as @chux pointed out. `free` does not do anythng if pointer is `NULL`. more at `man 3 free` — dlmeetei, Jul 03 '17 at 08:53

score 1 · Answer 1 · answered Jul 02 '17 at 09:52

1

You can use macros for this job.

#define check_free_set_to_null(pointer) if (pointer) { \
    free(pointer)\
    printf(pointer have been freed)\
} else {\
    printf(pointer couldnt had been freed)\
    return (1)\
}

answered Jul 02 '17 at 09:52

unalignedmemoryaccess

7,246
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It need to be inline on the file. How can I only activate this macro and generate the c file ? – user6714088 Jul 02 '17 at 09:59
@user6714088 with this approach, compiler will put it inline. – unalignedmemoryaccess Jul 02 '17 at 10:00
It need to be inline on a new or the same file for more editing without putting other define inline then – user6714088 Jul 02 '17 at 10:52
As title stated, I need to put the define or fonction text inline. – user6714088 Jul 02 '17 at 14:01
No, this is not achievable in that way. You have to open your file and do for exmaple `preg` replace in a file itself. – unalignedmemoryaccess Jul 02 '17 at 16:53

Replace function or define by the text itself

1 Answers1

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