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authorNguyễn Thái Ngọc Duy <pclouds@gmail.com>2013-07-09 15:29:00 (GMT)
committerJunio C Hamano <gitster@pobox.com>2013-07-09 16:12:48 (GMT)
commit9c5e6c802cde9881785b7f1b3278b97be4aabd82 (patch)
tree2eeb9fb013fffc711464d83141690fde1c72ce82 /unpack-trees.c
parentf8abaebab3fe1a1b873f9636ea410ac4007c8fa8 (diff)
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Convert "struct cache_entry *" to "const ..." wherever possible
I attempted to make index_state->cache[] a "const struct cache_entry **" to find out how existing entries in index are modified and where. The question I have is what do we do if we really need to keep track of on-disk changes in the index. The result is - diff-lib.c: setting CE_UPTODATE - name-hash.c: setting CE_HASHED - preload-index.c, read-cache.c, unpack-trees.c and builtin/update-index: obvious - entry.c: write_entry() may refresh the checked out entry via fill_stat_cache_info(). This causes "non-const struct cache_entry *" in builtin/apply.c, builtin/checkout-index.c and builtin/checkout.c - builtin/ls-files.c: --with-tree changes stagemask and may set CE_UPDATE Of these, write_entry() and its call sites are probably most interesting because it modifies on-disk info. But this is stat info and can be retrieved via refresh, at least for porcelain commands. Other just uses ce_flags for local purposes. So, keeping track of "dirty" entries is just a matter of setting a flag in index modification functions exposed by read-cache.c. Except unpack-trees, the rest of the code base does not do anything funny behind read-cache's back. The actual patch is less valueable than the summary above. But if anyone wants to re-identify the above sites. Applying this patch, then this: diff --git a/cache.h b/cache.h index 430d021..1692891 100644 --- a/cache.h +++ b/cache.h @@ -267,7 +267,7 @@ static inline unsigned int canon_mode(unsigned int mode) #define cache_entry_size(len) (offsetof(struct cache_entry,name) + (len) + 1) struct index_state { - struct cache_entry **cache; + const struct cache_entry **cache; unsigned int version; unsigned int cache_nr, cache_alloc, cache_changed; struct string_list *resolve_undo; will help quickly identify them without bogus warnings. Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'unpack-trees.c')
-rw-r--r--unpack-trees.c14
1 files changed, 7 insertions, 7 deletions
diff --git a/unpack-trees.c b/unpack-trees.c
index b27f2a6..bf01717 100644
--- a/unpack-trees.c
+++ b/unpack-trees.c
@@ -179,7 +179,7 @@ static void display_error_msgs(struct unpack_trees_options *o)
* Unlink the last component and schedule the leading directories for
* removal, such that empty directories get removed.
*/
-static void unlink_entry(struct cache_entry *ce)
+static void unlink_entry(const struct cache_entry *ce)
{
if (!check_leading_path(ce->name, ce_namelen(ce)))
return;
@@ -199,7 +199,7 @@ static int check_updates(struct unpack_trees_options *o)
if (o->update && o->verbose_update) {
for (total = cnt = 0; cnt < index->cache_nr; cnt++) {
- struct cache_entry *ce = index->cache[cnt];
+ const struct cache_entry *ce = index->cache[cnt];
if (ce->ce_flags & (CE_UPDATE | CE_WT_REMOVE))
total++;
}
@@ -212,7 +212,7 @@ static int check_updates(struct unpack_trees_options *o)
if (o->update)
git_attr_set_direction(GIT_ATTR_CHECKOUT, &o->result);
for (i = 0; i < index->cache_nr; i++) {
- struct cache_entry *ce = index->cache[i];
+ const struct cache_entry *ce = index->cache[i];
if (ce->ce_flags & CE_WT_REMOVE) {
display_progress(progress, ++cnt);
@@ -376,7 +376,7 @@ static struct cache_entry *next_cache_entry(struct unpack_trees_options *o)
return NULL;
}
-static void add_same_unmerged(struct cache_entry *ce,
+static void add_same_unmerged(const struct cache_entry *ce,
struct unpack_trees_options *o)
{
struct index_state *index = o->src_index;
@@ -650,7 +650,7 @@ static int find_cache_pos(struct traverse_info *info,
int p_len = tree_entry_len(p);
for (pos = o->cache_bottom; pos < index->cache_nr; pos++) {
- struct cache_entry *ce = index->cache[pos];
+ const struct cache_entry *ce = index->cache[pos];
const char *ce_name, *ce_slash;
int cmp, ce_len;
@@ -1353,7 +1353,7 @@ static int verify_clean_subdirectory(const struct cache_entry *ce,
*/
static int icase_exists(struct unpack_trees_options *o, const char *name, int len, struct stat *st)
{
- struct cache_entry *src;
+ const struct cache_entry *src;
src = index_name_exists(o->src_index, name, len, 1);
return src && !ie_match_stat(o->src_index, src, st, CE_MATCH_IGNORE_VALID|CE_MATCH_IGNORE_SKIP_WORKTREE);
@@ -1364,7 +1364,7 @@ static int check_ok_to_remove(const char *name, int len, int dtype,
enum unpack_trees_error_types error_type,
struct unpack_trees_options *o)
{
- struct cache_entry *result;
+ const struct cache_entry *result;
/*
* It may be that the 'lstat()' succeeded even though