> Date: Mon, 7 Aug 2023 23:58:50 +0200 > From: Tobias Nygren <t...@netbsd.org> > > Is this sort of fix acceptable for the above cases? > > + ptrdiff_t offset = pos - buf; > new_buf = realloc(buf, buf_size); > if (!new_buf) > err(2, "realloc of linebuf to %zu bytes failed", > buf_size); > - > + > end = new_buf + buf_size; > - pos = new_buf + (pos - buf); > + pos = new_buf + offset; > buf = new_buf;
Yes, this is a good approach. Even if it's suboptimal in some cases, it is very easy to audit mechanical changes, which is important if there are a lot of them. Any further case-specific simplifications (like changing ptrdiff_t to size_t, since it will always be nonnegative here; just using `size_t offset = buf_size' before `buf_size *= 2', since since pos == end and end == buf + buf_size) can be done afterward in a separate commit.
