Since diff_line_range can form a single list through its
'next' pointer, we provide two kind of clone.
diff_line_range_clone:
used to clone only the element node and set the
element's 'next' pointer to NULL.
diff_line_range_clone_deeply:
used to clone the whole list of ranges.
Signed-off-by: Bo Yang <struggleyb.nku@xxxxxxxxx>
---
line.c | 39 +++++++++++++++++++++++++++++++++++++++
line.h | 4 ++++
2 files changed, 43 insertions(+), 0 deletions(-)
diff --git a/line.c b/line.c
index 6c5f69e..1b77172 100644
--- a/line.c
+++ b/line.c
@@ -384,6 +384,45 @@ void diff_line_range_append(struct diff_line_range *r, const char *arg)
r->ranges[r->nr - 1].arg = arg;
}
+struct diff_line_range *diff_line_range_clone(struct diff_line_range *r)
+{
+ struct diff_line_range *ret = xmalloc(sizeof(*ret));
+ int i = 0;
+
+ DIFF_LINE_RANGE_INIT(ret);
+ ret->ranges = xcalloc(r->nr, sizeof(struct line_range));
+ memcpy(ret->ranges, r->ranges, sizeof(struct line_range) * r->nr);
+
+ ret->alloc = ret->nr = r->nr;
+
+ for (; i < ret->nr; i++)
+ PRINT_PAIR_INIT(&ret->ranges[i].pair);
+
+ ret->spec = r->spec;
+ assert(ret->spec);
+ ret->spec->count++;
+
+ return ret;
+}
+
+struct diff_line_range *diff_line_range_clone_deeply(struct diff_line_range *r)
+{
+ struct diff_line_range *ret = NULL;
+ struct diff_line_range *tmp = NULL, *prev = NULL;
+
+ assert(r);
+ ret = tmp = prev = diff_line_range_clone(r);
+ r = r->next;
+ while (r) {
+ tmp = diff_line_range_clone(r);
+ prev->next = tmp;
+ prev = tmp;
+ r = r->next;
+ }
+
+ return ret;
+}
+
struct diff_line_range *diff_line_range_merge(struct diff_line_range *out,
struct diff_line_range *other)
{
diff --git a/line.h b/line.h
index 5bde828..e03eff0 100644
--- a/line.h
+++ b/line.h
@@ -119,6 +119,10 @@ extern struct diff_line_range *diff_line_range_merge(
struct diff_line_range *out,
struct diff_line_range *other);
+extern struct diff_line_range *diff_line_range_clone(struct diff_line_range *r);
+
+extern struct diff_line_range *diff_line_range_clone_deeply(struct diff_line_range *r);
+
extern void setup_line(struct rev_info *rev, struct diff_line_range *r);
extern void add_line_range(struct rev_info *revs, struct commit *commit,
--
1.7.2.19.g79e5d
--
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