From f5914f4b6bcdb517733c761fe5ba9d94471eb01d Mon Sep 17 00:00:00 2001 From: Jeff King Date: Fri, 10 Apr 2020 15:44:28 -0400 Subject: parse_config_key(): return subsection len as size_t We return the length to a subset of a string using an "int *" out-parameter. This is fine most of the time, as we'd expect config keys to be relatively short, but it could behave oddly if we had a gigantic config key. A more appropriate type is size_t. Let's switch over, which lets our callers use size_t as appropriate (they are bound by our type because they must pass the out-parameter as a pointer). This is mostly just a cleanup to make it clear this code handles long strings correctly. In practice, our config parser already chokes on long key names (because of a similar int/size_t mixup!). When doing an int/size_t conversion, we have to be careful that nobody was trying to assign a negative value to the variable. I manually confirmed that for each case here. They tend to just feed the result to xmemdupz() or similar; in a few cases I adjusted the parameter types for helper functions to make sure the size_t is preserved. Signed-off-by: Jeff King Signed-off-by: Junio C Hamano --- userdiff.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'userdiff.c') diff --git a/userdiff.c b/userdiff.c index efbe05e5a5..30ab42df8e 100644 --- a/userdiff.c +++ b/userdiff.c @@ -222,7 +222,7 @@ static struct userdiff_driver driver_false = { { NULL, 0 } }; -static struct userdiff_driver *userdiff_find_by_namelen(const char *k, int len) +static struct userdiff_driver *userdiff_find_by_namelen(const char *k, size_t len) { int i; for (i = 0; i < ndrivers; i++) { @@ -266,7 +266,7 @@ int userdiff_config(const char *k, const char *v) { struct userdiff_driver *drv; const char *name, *type; - int namelen; + size_t namelen; if (parse_config_key(k, "diff", &name, &namelen, &type) || !name) return 0; -- cgit v1.3