Question Confused over piece of code in parse_room()

thomas
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26 Jan 2020 22:12 #8516 by thomas

Replied by thomas on topic Confused over piece of code in parse_room()

If I understand correctly, because the original *end and mallocated *end have the same address as new_descr->description, plus *end being defined within this scope, means that *end disappears without having to free and null it.

Yes, that is exactly right - we've assigned the pointer new_descr->description to point to the same memory we were pointing to with the end pointer. We no longer need that, then.

Note that I've been quite a bit more descriptive in the new version of the code, in the pull request linked above.

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krell
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29 Jan 2020 14:31 #8522 by krell

Replied by krell on topic Confused over piece of code in parse_room()

I declared the new function as static and set it up that way. It seems to be working fine after running it like that for a while. Is there any reason that this function should not be static? Are there plans to use this function outside of db.c?

Code:

static void ensure_newline_terminated(struct extra_descr_data *);
.
.
.
/* Fix for crashes in the editor when formatting. E-descs are assumed to
  * end with a \r\n. -Welcor */
static void ensure_newline_terminated(struct extra_descr_data* new_descr) {
  char *with_term, *end;

  if (new_descr->description == NULL) {
    return;
  }

  end = strchr(new_descr->description, '\0');
  if (end > new_descr->description && *(end - 1) != '\n') {
    CREATE(with_term, char, strlen(new_descr->description) + 3);
    sprintf(with_term, "%s\r\n", new_descr->description); /* snprintf ok : size checked above*/
    free(new_descr->description);
    new_descr->description = with_term;
  }
}

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thomas
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31 Jan 2020 22:17 #8530 by thomas

Replied by thomas on topic Confused over piece of code in parse_room()

Indeed, it can be static. It is - as far as I know - the only place it makes sense to use it.

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