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| author | John Keeping <john@keeping.me.uk> | 2016-02-08 14:12:35 +0000 |
|---|---|---|
| committer | Jason A. Donenfeld <Jason@zx2c4.com> | 2016-02-08 18:27:38 +0100 |
| commit | bdcbe0922d7099ebd61d875709ea9408bc1d7543 (patch) | |
| tree | df225a74a832eb528e0686d6286bd8a5282eb633 /ui-diff.c | |
| parent | ui-stats: if we're going to abuse void*, do it safely (diff) | |
| download | cgit-pink-bdcbe0922d7099ebd61d875709ea9408bc1d7543.tar.gz cgit-pink-bdcbe0922d7099ebd61d875709ea9408bc1d7543.zip | |
ui-stats: cast pointer before checking for zero
We abuse the "void *util" field as a counter and recently started to cast it to a uintptr_t to avoid risking nasal demons by performing arithmetic on a void pointer. However, compilers are also known to do "interesting" things if they know that a pointer is or isn't NULL. Make this safer by checking if the counter (after casting) is non-zero rather than checking if the pointer is non-null. Signed-off-by: John Keeping <john@keeping.me.uk>
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