diff-lib, read-tree, unpack-trees: mark cache_entry pointers const

Add const to struct cache_entry pointers throughout the tree which are
only used for reading.  This allows callers to pass in const pointers.

Signed-off-by: René Scharfe <rene.scharfe@lsrfire.ath.cx>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/builtin/read-tree.c b/builtin/read-tree.c
index 042ac1b84f22257d1a8a4d32d34124b6dc372f16..b847486cba628988d431d61fbdc728747f82c2e1 100644 (file)
--- a/builtin/read-tree.c
+++ b/builtin/read-tree.c
@@ -66,7 +66,7 @@ static int exclude_per_directory_cb(const struct option *opt, const char *arg,
        return 0;
 }
 
-static void debug_stage(const char *label, struct cache_entry *ce,
+static void debug_stage(const char *label, const struct cache_entry *ce,
                        struct unpack_trees_options *o)
 {
        printf("%s ", label);

diff --git a/diff-lib.c b/diff-lib.c
index f35de0ffa0ec263acae7ac6211e3c2817987f760..83d0cb8f8212aeb284edb4147d15288db8f0f0bd 100644 (file)
--- a/diff-lib.c
+++ b/diff-lib.c
@@ -64,8 +64,9 @@ static int check_removed(const struct cache_entry *ce, struct stat *st)
  * commits, untracked content and/or modified content).
  */
 static int match_stat_with_submodule(struct diff_options *diffopt,
-                                     struct cache_entry *ce, struct stat *st,
-                                     unsigned ce_option, unsigned *dirty_submodule)
+                                    const struct cache_entry *ce,
+                                    struct stat *st, unsigned ce_option,
+                                    unsigned *dirty_submodule)
 {
        int changed = ce_match_stat(ce, st, ce_option);
        if (S_ISGITLINK(ce->ce_mode)) {
@@ -237,7 +238,7 @@ int run_diff_files(struct rev_info *revs, unsigned int option)
 /* A file entry went away or appeared */
 static void diff_index_show_file(struct rev_info *revs,
                                 const char *prefix,
-                                struct cache_entry *ce,
+                                const struct cache_entry *ce,
                                 const unsigned char *sha1, int sha1_valid,
                                 unsigned int mode,
                                 unsigned dirty_submodule)
@@ -246,7 +247,7 @@ static void diff_index_show_file(struct rev_info *revs,
                       sha1, sha1_valid, ce->name, dirty_submodule);
 }
 
-static int get_stat_data(struct cache_entry *ce,
+static int get_stat_data(const struct cache_entry *ce,
                         const unsigned char **sha1p,
                         unsigned int *modep,
                         int cached, int match_missing,
@@ -283,7 +284,7 @@ static int get_stat_data(struct cache_entry *ce,
 }
 
 static void show_new_file(struct rev_info *revs,
-                         struct cache_entry *new,
+                         const struct cache_entry *new,
                          int cached, int match_missing)
 {
        const unsigned char *sha1;
@@ -302,8 +303,8 @@ static void show_new_file(struct rev_info *revs,
 }
 
 static int show_modified(struct rev_info *revs,
-                        struct cache_entry *old,
-                        struct cache_entry *new,
+                        const struct cache_entry *old,
+                        const struct cache_entry *new,
                         int report_missing,
                         int cached, int match_missing)
 {
@@ -362,8 +363,8 @@ static int show_modified(struct rev_info *revs,
  * give you the position and number of entries in the index).
  */
 static void do_oneway_diff(struct unpack_trees_options *o,
-       struct cache_entry *idx,
-       struct cache_entry *tree)
+                          const struct cache_entry *idx,
+                          const struct cache_entry *tree)
 {
        struct rev_info *revs = o->unpack_data;
        int match_missing, cached;
@@ -425,8 +426,8 @@ static void do_oneway_diff(struct unpack_trees_options *o,
  */
 static int oneway_diff(struct cache_entry **src, struct unpack_trees_options *o)
 {
-       struct cache_entry *idx = src[0];
-       struct cache_entry *tree = src[1];
+       const struct cache_entry *idx = src[0];
+       const struct cache_entry *tree = src[1];
        struct rev_info *revs = o->unpack_data;
 
        /*

diff --git a/unpack-trees.c b/unpack-trees.c
index 2fecef8022ef51d6524fd9545d37f5a9454f0479..c5a40dfbe3214bee90b1824f4590fe2069c4be02 100644 (file)
--- a/unpack-trees.c
+++ b/unpack-trees.c
@@ -241,8 +241,11 @@ static int check_updates(struct unpack_trees_options *o)
        return errs != 0;
 }
 
-static int verify_uptodate_sparse(struct cache_entry *ce, struct unpack_trees_options *o);
-static int verify_absent_sparse(struct cache_entry *ce, enum unpack_trees_error_types, struct unpack_trees_options *o);
+static int verify_uptodate_sparse(const struct cache_entry *ce,
+                                 struct unpack_trees_options *o);
+static int verify_absent_sparse(const struct cache_entry *ce,
+                               enum unpack_trees_error_types,
+                               struct unpack_trees_options *o);
 
 static int apply_sparse_checkout(struct cache_entry *ce, struct unpack_trees_options *o)
 {
@@ -326,7 +329,7 @@ static void mark_all_ce_unused(struct index_state *index)
                index->cache[i]->ce_flags &= ~(CE_UNPACKED | CE_ADDED | CE_NEW_SKIP_WORKTREE);
 }
 
-static int locate_in_src_index(struct cache_entry *ce,
+static int locate_in_src_index(const struct cache_entry *ce,
                               struct unpack_trees_options *o)
 {
        struct index_state *index = o->src_index;
@@ -1001,7 +1004,9 @@ static void mark_new_skip_worktree(struct exclude_list *el,
                       select_flag, skip_wt_flag, el);
 }
 
-static int verify_absent(struct cache_entry *, enum unpack_trees_error_types, struct unpack_trees_options *);
+static int verify_absent(const struct cache_entry *,
+                        enum unpack_trees_error_types,
+                        struct unpack_trees_options *);
 /*
  * N-way merge "len" trees.  Returns 0 on success, -1 on failure to manipulate the
  * resulting index, -2 on failure to reflect the changes to the work tree.
@@ -1171,12 +1176,13 @@ return_failed:
 
 /* Here come the merge functions */
 
-static int reject_merge(struct cache_entry *ce, struct unpack_trees_options *o)
+static int reject_merge(const struct cache_entry *ce,
+                       struct unpack_trees_options *o)
 {
        return add_rejected_path(o, ERROR_WOULD_OVERWRITE, ce->name);
 }
 
-static int same(struct cache_entry *a, struct cache_entry *b)
+static int same(const struct cache_entry *a, const struct cache_entry *b)
 {
        if (!!a != !!b)
                return 0;
@@ -1193,9 +1199,9 @@ static int same(struct cache_entry *a, struct cache_entry *b)
  * When a CE gets turned into an unmerged entry, we
  * want it to be up-to-date
  */
-static int verify_uptodate_1(struct cache_entry *ce,
-                                  struct unpack_trees_options *o,
-                                  enum unpack_trees_error_types error_type)
+static int verify_uptodate_1(const struct cache_entry *ce,
+                            struct unpack_trees_options *o,
+                            enum unpack_trees_error_types error_type)
 {
        struct stat st;
 
@@ -1234,7 +1240,7 @@ static int verify_uptodate_1(struct cache_entry *ce,
                add_rejected_path(o, error_type, ce->name);
 }
 
-static int verify_uptodate(struct cache_entry *ce,
+static int verify_uptodate(const struct cache_entry *ce,
                           struct unpack_trees_options *o)
 {
        if (!o->skip_sparse_checkout && (ce->ce_flags & CE_NEW_SKIP_WORKTREE))
@@ -1242,13 +1248,14 @@ static int verify_uptodate(struct cache_entry *ce,
        return verify_uptodate_1(ce, o, ERROR_NOT_UPTODATE_FILE);
 }
 
-static int verify_uptodate_sparse(struct cache_entry *ce,
+static int verify_uptodate_sparse(const struct cache_entry *ce,
                                  struct unpack_trees_options *o)
 {
        return verify_uptodate_1(ce, o, ERROR_SPARSE_NOT_UPTODATE_FILE);
 }
 
-static void invalidate_ce_path(struct cache_entry *ce, struct unpack_trees_options *o)
+static void invalidate_ce_path(const struct cache_entry *ce,
+                              struct unpack_trees_options *o)
 {
        if (ce)
                cache_tree_invalidate_path(o->src_index->cache_tree, ce->name);
@@ -1261,16 +1268,16 @@ static void invalidate_ce_path(struct cache_entry *ce, struct unpack_trees_optio
  * Currently, git does not checkout subprojects during a superproject
  * checkout, so it is not going to overwrite anything.
  */
-static int verify_clean_submodule(struct cache_entry *ce,
-                                     enum unpack_trees_error_types error_type,
-                                     struct unpack_trees_options *o)
+static int verify_clean_submodule(const struct cache_entry *ce,
+                                 enum unpack_trees_error_types error_type,
+                                 struct unpack_trees_options *o)
 {
        return 0;
 }
 
-static int verify_clean_subdirectory(struct cache_entry *ce,
-                                     enum unpack_trees_error_types error_type,
-                                     struct unpack_trees_options *o)
+static int verify_clean_subdirectory(const struct cache_entry *ce,
+                                    enum unpack_trees_error_types error_type,
+                                    struct unpack_trees_options *o)
 {
        /*
         * we are about to extract "ce->name"; we would not want to lose
@@ -1356,7 +1363,7 @@ static int icase_exists(struct unpack_trees_options *o, const char *name, int le
 }
 
 static int check_ok_to_remove(const char *name, int len, int dtype,
-                             struct cache_entry *ce, struct stat *st,
+                             const struct cache_entry *ce, struct stat *st,
                              enum unpack_trees_error_types error_type,
                              struct unpack_trees_options *o)
 {
@@ -1411,9 +1418,9 @@ static int check_ok_to_remove(const char *name, int len, int dtype,
  * We do not want to remove or overwrite a working tree file that
  * is not tracked, unless it is ignored.
  */
-static int verify_absent_1(struct cache_entry *ce,
-                                enum unpack_trees_error_types error_type,
-                                struct unpack_trees_options *o)
+static int verify_absent_1(const struct cache_entry *ce,
+                          enum unpack_trees_error_types error_type,
+                          struct unpack_trees_options *o)
 {
        int len;
        struct stat st;
@@ -1446,7 +1453,7 @@ static int verify_absent_1(struct cache_entry *ce,
        }
 }
 
-static int verify_absent(struct cache_entry *ce,
+static int verify_absent(const struct cache_entry *ce,
                         enum unpack_trees_error_types error_type,
                         struct unpack_trees_options *o)
 {
@@ -1455,9 +1462,9 @@ static int verify_absent(struct cache_entry *ce,
        return verify_absent_1(ce, error_type, o);
 }
 
-static int verify_absent_sparse(struct cache_entry *ce,
-                        enum unpack_trees_error_types error_type,
-                        struct unpack_trees_options *o)
+static int verify_absent_sparse(const struct cache_entry *ce,
+                               enum unpack_trees_error_types error_type,
+                               struct unpack_trees_options *o)
 {
        enum unpack_trees_error_types orphaned_error = error_type;
        if (orphaned_error == ERROR_WOULD_LOSE_UNTRACKED_OVERWRITTEN)
@@ -1467,7 +1474,7 @@ static int verify_absent_sparse(struct cache_entry *ce,
 }
 
 static int merged_entry(const struct cache_entry *ce,
-                       struct cache_entry *old,
+                       const struct cache_entry *old,
                        struct unpack_trees_options *o)
 {
        int update = CE_UPDATE;
@@ -1527,8 +1534,9 @@ static int merged_entry(const struct cache_entry *ce,
        return 1;
 }
 
-static int deleted_entry(struct cache_entry *ce, struct cache_entry *old,
-               struct unpack_trees_options *o)
+static int deleted_entry(const struct cache_entry *ce,
+                        const struct cache_entry *old,
+                        struct unpack_trees_options *o)
 {
        /* Did it exist in the index? */
        if (!old) {
@@ -1543,7 +1551,8 @@ static int deleted_entry(struct cache_entry *ce, struct cache_entry *old,
        return 1;
 }
 
-static int keep_entry(struct cache_entry *ce, struct unpack_trees_options *o)
+static int keep_entry(const struct cache_entry *ce,
+                     struct unpack_trees_options *o)
 {
        add_entry(o, ce, 0, 0);
        return 1;
@@ -1567,9 +1576,9 @@ static void show_stage_entry(FILE *o,
 
 int threeway_merge(struct cache_entry **stages, struct unpack_trees_options *o)
 {
-       struct cache_entry *index;
-       struct cache_entry *head;
-       struct cache_entry *remote = stages[o->head_idx + 1];
+       const struct cache_entry *index;
+       const struct cache_entry *head;
+       const struct cache_entry *remote = stages[o->head_idx + 1];
        int count;
        int head_match = 0;
        int remote_match = 0;
@@ -1654,7 +1663,7 @@ int threeway_merge(struct cache_entry **stages, struct unpack_trees_options *o)
        if (o->aggressive) {
                int head_deleted = !head;
                int remote_deleted = !remote;
-               struct cache_entry *ce = NULL;
+               const struct cache_entry *ce = NULL;
 
                if (index)
                        ce = index;
@@ -1739,9 +1748,9 @@ int threeway_merge(struct cache_entry **stages, struct unpack_trees_options *o)
  */
 int twoway_merge(struct cache_entry **src, struct unpack_trees_options *o)
 {
-       struct cache_entry *current = src[0];
-       struct cache_entry *oldtree = src[1];
-       struct cache_entry *newtree = src[2];
+       const struct cache_entry *current = src[0];
+       const struct cache_entry *oldtree = src[1];
+       const struct cache_entry *newtree = src[2];
 
        if (o->merge_size != 2)
                return error("Cannot do a twoway merge of %d trees",
@@ -1806,8 +1815,8 @@ int twoway_merge(struct cache_entry **src, struct unpack_trees_options *o)
 int bind_merge(struct cache_entry **src,
                struct unpack_trees_options *o)
 {
-       struct cache_entry *old = src[0];
-       struct cache_entry *a = src[1];
+       const struct cache_entry *old = src[0];
+       const struct cache_entry *a = src[1];
 
        if (o->merge_size != 1)
                return error("Cannot do a bind merge of %d trees",
@@ -1829,8 +1838,8 @@ int bind_merge(struct cache_entry **src,
  */
 int oneway_merge(struct cache_entry **src, struct unpack_trees_options *o)
 {
-       struct cache_entry *old = src[0];
-       struct cache_entry *a = src[1];
+       const struct cache_entry *old = src[0];
+       const struct cache_entry *a = src[1];
 
        if (o->merge_size != 1)
                return error("Cannot do a oneway merge of %d trees",