string-list API: change "nr" and "alloc" to "size_t"

Change the "nr" and "alloc" members of "struct string_list" to use
"size_t" instead of "nr". On some platforms the size of an "unsigned
int" will be smaller than a "size_t", e.g. a 32 bit unsigned v.s. 64
bit unsigned. As "struct string_list" is a generic API we use in a lot
of places this might cause overflows.

As one example: code in "refs.c" keeps track of the number of refs
with a "size_t", and auxiliary code in builtin/remote.c in
get_ref_states() appends those to a "struct string_list".

While we're at it split the "nr" and "alloc" in string-list.h across
two lines, which is the case for most such struct member
declarations (e.g. in "strbuf.h" and "strvec.h").

Changing e.g. "int i" to "size_t i" in run_and_feed_hook() isn't
strictly necessary, and there are a lot more cases where we'll use a
local "int", "unsigned int" etc. variable derived from the "nr" in the
"struct string_list". But in that case as well as
add_wrapped_shortlog_msg() in builtin/shortlog.c we need to adjust the
printf format referring to "nr" anyway, so let's also change the other
variables referring to it.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 4 insertions, 4 deletions

diff --git a/bundle.c b/bundle.c
index a0bb687b0f..7608701a51 100644
--- a/bundle.c
+++ b/bundle.c
@@ -255,18 +255,18 @@ int verify_bundle(struct repository *r,
 
 		r = &header->references;
 		printf_ln(Q_("The bundle contains this ref:",
-			     "The bundle contains these %d refs:",
+			     "The bundle contains these %"PRIuMAX" refs:",
 			     r->nr),
-			  r->nr);
+			  (uintmax_t)r->nr);
 		list_refs(r, 0, NULL);
 		r = &header->prerequisites;
 		if (!r->nr) {
 			printf_ln(_("The bundle records a complete history."));
 		} else {
 			printf_ln(Q_("The bundle requires this ref:",
-				     "The bundle requires these %d refs:",
+				     "The bundle requires these %"PRIuMAX" refs:",
 				     r->nr),
-				  r->nr);
+				  (uintmax_t)r->nr);
 			list_refs(r, 0, NULL);
 		}
 	}