Modify match_stat_basic, into one function that handles the
general case, which is the same for all index formats, and
a function that handles the specific parts for each index
file version.

Signed-off-by: Thomas Gummerer <t.gumme...@gmail.com>
---
 read-cache.c | 77 +++++++++++++++++++++++++++++++-----------------------------
 1 file changed, 40 insertions(+), 37 deletions(-)

diff --git a/read-cache.c b/read-cache.c
index 3d83f05..6a0af35 100644
--- a/read-cache.c
+++ b/read-cache.c
@@ -163,38 +163,10 @@ static int ce_modified_check_fs(struct cache_entry *ce, 
struct stat *st)
        return 0;
 }
 
-static int ce_match_stat_basic(struct cache_entry *ce, struct stat *st)
+static int ce_match_stat_basic_v2(struct cache_entry *ce,
+                               struct stat *st,
+                               int changed)
 {
-       unsigned int changed = 0;
-
-       if (ce->ce_flags & CE_REMOVE)
-               return MODE_CHANGED | DATA_CHANGED | TYPE_CHANGED;
-
-       switch (ce->ce_mode & S_IFMT) {
-       case S_IFREG:
-               changed |= !S_ISREG(st->st_mode) ? TYPE_CHANGED : 0;
-               /* We consider only the owner x bit to be relevant for
-                * "mode changes"
-                */
-               if (trust_executable_bit &&
-                   (0100 & (ce->ce_mode ^ st->st_mode)))
-                       changed |= MODE_CHANGED;
-               break;
-       case S_IFLNK:
-               if (!S_ISLNK(st->st_mode) &&
-                   (has_symlinks || !S_ISREG(st->st_mode)))
-                       changed |= TYPE_CHANGED;
-               break;
-       case S_IFGITLINK:
-               /* We ignore most of the st_xxx fields for gitlinks */
-               if (!S_ISDIR(st->st_mode))
-                       changed |= TYPE_CHANGED;
-               else if (ce_compare_gitlink(ce))
-                       changed |= DATA_CHANGED;
-               return changed;
-       default:
-               die("internal error: ce_mode is %o", ce->ce_mode);
-       }
        if (ce->ce_mtime.sec != (unsigned int)st->st_mtime)
                changed |= MTIME_CHANGED;
        if (trust_ctime && ce->ce_ctime.sec != (unsigned int)st->st_ctime)
@@ -235,6 +207,43 @@ static int ce_match_stat_basic(struct cache_entry *ce, 
struct stat *st)
        return changed;
 }
 
+static int ce_match_stat_basic(struct cache_entry *ce, struct stat *st)
+{
+       unsigned int changed = 0;
+
+       if (ce->ce_flags & CE_REMOVE)
+               return MODE_CHANGED | DATA_CHANGED | TYPE_CHANGED;
+
+       switch (ce->ce_mode & S_IFMT) {
+       case S_IFREG:
+               changed |= !S_ISREG(st->st_mode) ? TYPE_CHANGED : 0;
+               /* We consider only the owner x bit to be relevant for
+                * "mode changes"
+                */
+               if (trust_executable_bit &&
+                   (0100 & (ce->ce_mode ^ st->st_mode)))
+                       changed |= MODE_CHANGED;
+               break;
+       case S_IFLNK:
+               if (!S_ISLNK(st->st_mode) &&
+                   (has_symlinks || !S_ISREG(st->st_mode)))
+                       changed |= TYPE_CHANGED;
+               break;
+       case S_IFGITLINK:
+               /* We ignore most of the st_xxx fields for gitlinks */
+               if (!S_ISDIR(st->st_mode))
+                       changed |= TYPE_CHANGED;
+               else if (ce_compare_gitlink(ce))
+                       changed |= DATA_CHANGED;
+               return changed;
+       default:
+               die("internal error: ce_mode is %o", ce->ce_mode);
+       }
+
+       changed = ce_match_stat_basic_v2(ce, st, changed);
+       return changed;
+}
+
 static int is_racy_timestamp(const struct index_state *istate, struct 
cache_entry *ce)
 {
        return (!S_ISGITLINK(ce->ce_mode) &&
@@ -1443,7 +1452,6 @@ void read_index_v2(struct index_state *istate, void 
*mmap, int mmap_size)
                src_offset += consumed;
        }
        strbuf_release(&previous_name_buf);
-
        while (src_offset <= mmap_size - 20 - 8) {
                /* After an array of active_nr index entries,
                 * there can be arbitrary number of extended
@@ -1500,7 +1508,6 @@ int read_index_from(struct index_state *istate, const 
char *path)
                die("index file smaller than expected");
 
        mmap = xmmap(NULL, mmap_size, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 
0);
-       close(fd);
        if (mmap == MAP_FAILED)
                die_errno("unable to map index file");
 
@@ -1512,7 +1519,6 @@ int read_index_from(struct index_state *istate, const 
char *path)
                goto unmap;
 
        read_index_v2(istate, mmap, mmap_size);
-
        istate->timestamp.sec = st.st_mtime;
        istate->timestamp.nsec = ST_MTIME_NSEC(st);
 
@@ -1802,9 +1808,6 @@ int write_index(struct index_state *istate, int newfd)
                }
        }
 
-       if (!istate->version)
-               istate->version = INDEX_FORMAT_DEFAULT;
-
        /* demote version 3 to version 2 when the latter suffices */
        if (istate->version == 3 || istate->version == 2)
                istate->version = extended ? 3 : 2;
-- 
1.7.10.886.gdf6792c.dirty

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