Subject: [PATCH 24/28] attr.c: always pass check[] to collect_some_attrs()

From: Stefan Beller <[email-masked]>
Date: Mon, 10 Oct 2016 17:21:11 -0700

From: Junio C Hamano <[email-masked]>

This function used to be called with check=NULL to signal it to
collect all attributes in the global check_all_attr[] array.

Because the longer term plan is to allocate check_all_attr[] and
attr_stack data structures per git_attr_check instance (i.e. "check"
here) to make the attr subsystem thread-safe, it is unacceptable.

Pass "Are we grabbing all attributes defined in the system?" bit as
a separate argument and pass it from the callers.

Signed-off-by: Junio C Hamano <[email-masked]>
Signed-off-by: Stefan Beller <[email-masked]>
---
 attr.c | 37 +++++++++++++++++++------------------
 1 file changed, 19 insertions(+), 18 deletions(-)

diff --git a/attr.c b/attr.c
index cb3b702..a08783a 100644
--- a/attr.c
+++ b/attr.c
@@ -756,11 +756,12 @@ static void empty_attr_check_elems(struct git_attr_check *check)
 
 /*
  * Collect attributes for path into the array pointed to by
- * check_all_attr.  If check is not NULL, only attributes in
- * check[] are collected. Otherwise all attributes are collected.
+ * check_all_attr.  If collect_all is zero, only attributes in
+ * check[] are collected.  Otherwise, check[] is cleared and
+ * any and all attributes that are visible are collected in it.
  */
 static void collect_some_attrs(const char *path, int pathlen,
-			       struct git_attr_check *check)
+			       struct git_attr_check *check, int collect_all)
 
 {
 	struct attr_stack *stk;
@@ -781,10 +782,11 @@ static void collect_some_attrs(const char *path, int pathlen,
 	}
 
 	prepare_attr_stack(path, dirlen);
+
 	for (i = 0; i < attr_nr; i++)
 		check_all_attr[i].value = ATTR__UNKNOWN;
 
-	if (check && !cannot_trust_maybe_real) {
+	if (!collect_all && !cannot_trust_maybe_real) {
 		struct git_attr_check_elem *celem = check->check;
 
 		rem = 0;
@@ -803,6 +805,17 @@ static void collect_some_attrs(const char *path, int pathlen,
 	rem = attr_nr;
 	for (stk = attr_stack; 0 < rem && stk; stk = stk->prev)
 		rem = fill(path, pathlen, basename_offset, stk, rem);
+
+	if (collect_all) {
+		empty_attr_check_elems(check);
+		for (i = 0; i < attr_nr; i++) {
+			const struct git_attr *attr = check_all_attr[i].attr;
+			const char *value = check_all_attr[i].value;
+			if (value == ATTR__UNSET || value == ATTR__UNKNOWN)
+				continue;
+			git_attr_check_append(check, attr)->value = value;
+		}
+	}
 }
 
 static int git_check_attrs(const char *path, int pathlen,
@@ -811,7 +824,7 @@ static int git_check_attrs(const char *path, int pathlen,
 	int i;
 	struct git_attr_check_elem *celem = check->check;
 
-	collect_some_attrs(path, pathlen, check);
+	collect_some_attrs(path, pathlen, check, 0);
 
 	for (i = 0; i < check->check_nr; i++) {
 		const char *value = check_all_attr[celem[i].attr->attr_nr].value;
@@ -825,19 +838,7 @@ static int git_check_attrs(const char *path, int pathlen,
 
 void git_all_attrs(const char *path, struct git_attr_check *check)
 {
-	int i;
-
-	git_attr_check_clear(check);
-	collect_some_attrs(path, strlen(path), NULL);
-
-	for (i = 0; i < attr_nr; i++) {
-		const char *name = check_all_attr[i].attr->name;
-		const char *value = check_all_attr[i].value;
-		if (value == ATTR__UNSET || value == ATTR__UNKNOWN)
-			continue;
-		git_attr_check_append(check, git_attr(name));
-		check->check[check->check_nr - 1].value = value;
-	}
+	collect_some_attrs(path, strlen(path), check, 1);
 }
 
 void git_attr_set_direction(enum git_attr_direction new, struct index_state *istate)
-- 
2.10.1.382.ga23ca1b.dirty