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, 3 deletions

diff --git a/mailmap.c b/mailmap.c
index 40ce152..7befdc5 100644
--- a/mailmap.c
+++ b/mailmap.c
@@ -43,8 +43,8 @@ static void free_mailmap_info(void *p, const char *s)
 static void free_mailmap_entry(void *p, const char *s)
 {
 	struct mailmap_entry *me = (struct mailmap_entry *)p;
-	debug_mm("mailmap: removing entries for <%s>, with %d sub-entries\n",
-		 s, me->namemap.nr);
+	debug_mm("mailmap: removing entries for <%s>, with %"PRIuMAX" sub-entries\n",
+		 s, (uintmax_t)me->namemap.nr);
 	debug_mm("mailmap: - simple: '%s' <%s>\n",
 		 debug_str(me->name), debug_str(me->email));
 
@@ -250,7 +250,8 @@ int read_mailmap(struct string_list *map)
 
 void clear_mailmap(struct string_list *map)
 {
-	debug_mm("mailmap: clearing %d entries...\n", map->nr);
+	debug_mm("mailmap: clearing %"PRIuMAX" entries...\n",
+		 (uintmax_t)map->nr);
 	map->strdup_strings = 1;
 	string_list_clear_func(map, free_mailmap_entry);
 	debug_mm("mailmap: cleared\n");