From: Elijah Newren <newren@xxxxxxxxx>
Add an idx_map member to struct dir_rename_info, which tracks a mapping
of the full filename to the index within rename_dst where that filename
is found. We will later use this for quickly finding an array entry in
rename_dst given the pathname.
Signed-off-by: Elijah Newren <newren@xxxxxxxxx>
---
diffcore-rename.c | 22 +++++++++++++++++++++-
1 file changed, 21 insertions(+), 1 deletion(-)
diff --git a/diffcore-rename.c b/diffcore-rename.c
index 489e9cb0871e..db569e4a0b0a 100644
--- a/diffcore-rename.c
+++ b/diffcore-rename.c
@@ -368,6 +368,7 @@ static int find_exact_renames(struct diff_options *options)
}
struct dir_rename_info {
+ struct strintmap idx_map;
struct strmap *dir_rename_count;
unsigned setup;
};
@@ -509,10 +510,26 @@ static void initialize_dir_rename_info(struct dir_rename_info *info,
info->dir_rename_count = xmalloc(sizeof(*dir_rename_count));
strmap_init(info->dir_rename_count);
}
+ strintmap_init_with_options(&info->idx_map, -1, NULL, 0);
+ /*
+ * Loop setting up both info->idx_map, and doing setup of
+ * info->dir_rename_count.
+ */
for (i = 0; i < rename_dst_nr; ++i) {
/*
- * Make dir_rename_count contain a map of a map:
+ * For non-renamed files, make idx_map contain mapping of
+ * filename -> index (index within rename_dst, that is)
+ */
+ if (!rename_dst[i].is_rename) {
+ char *filename = rename_dst[i].p->two->path;
+ strintmap_set(&info->idx_map, filename, i);
+ continue;
+ }
+
+ /*
+ * For everything else (i.e. renamed files), make
+ * dir_rename_count contain a map of a map:
* old_directory -> {new_directory -> count}
* In other words, for every pair look at the directories for
* the old filename and the new filename and count how many
@@ -546,6 +563,9 @@ static void cleanup_dir_rename_info(struct dir_rename_info *info,
if (!info->setup)
return;
+ /* idx_map */
+ strintmap_clear(&info->idx_map);
+
if (!keep_dir_rename_count) {
partial_clear_dir_rename_count(info->dir_rename_count);
strmap_clear(info->dir_rename_count, 1);
--
gitgitgadget
