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authorJohn Keeping <john@keeping.me.uk>2016-02-08 14:12:35 +0000
committerJason A. Donenfeld <Jason@zx2c4.com>2016-02-08 18:27:38 +0100
commitbdcbe0922d7099ebd61d875709ea9408bc1d7543 (patch)
treedf225a74a832eb528e0686d6286bd8a5282eb633
parenta8b9ef8c1c68fbb9c89db2d8c12dca38c15e2bfd (diff)
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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>
-rw-r--r--ui-stats.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/ui-stats.c b/ui-stats.c
index a9c13fd..8cd9178 100644
--- a/ui-stats.c
+++ b/ui-stats.c
@@ -184,9 +184,9 @@ static void add_commit(struct string_list *authors, struct commit *commit,
period->trunc(date);
tmp = xstrdup(period->pretty(date));
item = string_list_insert(items, tmp);
- if (item->util)
- free(tmp);
counter = (uintptr_t *)&item->util;
+ if (*counter)
+ free(tmp);
(*counter)++;
authorstat->total++;