Add a function that allows unwanted entries in an object_array to be
removed. This encapsulation is a step towards giving object_array
ownership of its entries' name memory.
Use the new function to replace revision.c:gc_boundary().
Signed-off-by: Michael Haggerty <mhag...@alum.mit.edu>
---
object.c | 16 ++++++++++++++++
object.h | 11 +++++++++++
revision.c | 28 ++++++++++------------------
3 files changed, 37 insertions(+), 18 deletions(-)
diff --git a/object.c b/object.c
index 20703f5..fcd4a82 100644
--- a/object.c
+++ b/object.c
@@ -278,6 +278,22 @@ void add_object_array_with_mode(struct object *obj, const
char *name, struct obj
array->nr = ++nr;
}
+void object_array_filter(struct object_array *array,
+ object_array_each_func_t want, void *cb_data)
+{
+ unsigned nr = array->nr, src, dst;
+ struct object_array_entry *objects = array->objects;
+
+ for (src = dst = 0; src < nr; src++) {
+ if (want(&objects[src], cb_data)) {
+ if (src != dst)
+ objects[dst] = objects[src];
+ dst++;
+ }
+ }
+ array->nr = dst;
+}
+
void object_array_remove_duplicates(struct object_array *array)
{
unsigned int ref, src, dst;
diff --git a/object.h b/object.h
index 97d384b..0d39ff4 100644
--- a/object.h
+++ b/object.h
@@ -85,6 +85,17 @@ int object_list_contains(struct object_list *list, struct
object *obj);
/* Object array handling .. */
void add_object_array(struct object *obj, const char *name, struct
object_array *array);
void add_object_array_with_mode(struct object *obj, const char *name, struct
object_array *array, unsigned mode);
+
+typedef int (*object_array_each_func_t)(struct object_array_entry *, void *);
+
+/*
+ * Apply want to each entry in array, retaining only the entries for
+ * which the function returns true. Preserve the order of the entries
+ * that are retained.
+ */
+void object_array_filter(struct object_array *array,
+ object_array_each_func_t want, void *cb_data);
+
void object_array_remove_duplicates(struct object_array *);
void clear_object_flags(unsigned flags);
diff --git a/revision.c b/revision.c
index 19c59f4..ddc6d7c 100644
--- a/revision.c
+++ b/revision.c
@@ -2435,23 +2435,6 @@ static struct commit *get_revision_1(struct rev_info
*revs)
return NULL;
}
-static void gc_boundary(struct object_array *array)
-{
- unsigned nr = array->nr, i, j;
- struct object_array_entry *objects = array->objects;
-
- for (i = j = 0; i < nr; i++) {
- if (objects[i].item->flags & SHOWN)
- continue;
- if (i != j)
- objects[j] = objects[i];
- j++;
- }
- for (i = j; i < nr; i++)
- objects[i].item = NULL;
- array->nr = j;
-}
-
static void create_boundary_commit_list(struct rev_info *revs)
{
unsigned i;
@@ -2493,6 +2476,15 @@ static void create_boundary_commit_list(struct rev_info
*revs)
sort_in_topological_order(&revs->commits, revs->lifo);
}
+/*
+ * Return true for entries that have not yet been shown. (This is an
+ * object_array_each_func_t.)
+ */
+static int entry_unshown(struct object_array_entry *entry, void
*cb_data_unused)
+{
+ return !(entry->item->flags & SHOWN);
+}
+
static struct commit *get_revision_internal(struct rev_info *revs)
{
struct commit *c = NULL;
@@ -2575,7 +2567,7 @@ static struct commit *get_revision_internal(struct
rev_info *revs)
p->flags |= CHILD_SHOWN;
if (revs->boundary_commits.nr == revs->boundary_commits.alloc) {
/* Try to make space and thereby avoid a realloc(): */
- gc_boundary(&revs->boundary_commits);
+ object_array_filter(&revs->boundary_commits,
entry_unshown, NULL);
}
add_object_array(p, NULL, &revs->boundary_commits);
}
--
1.8.2.3
--
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