read-cache.c: introduce is_racy_timestamp() helper

This moves a common boolean expression into a helper function,
and makes the comparison between filesystem timestamp and index
timestamp done in the function in line with the other places.
st.st_mtime should be casted to (unsigned int) when compared to
an index timestamp ce_mtime.

Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/read-cache.c b/read-cache.c
index 8f5d02afaa1265205db5d1ad2a5d5ed3232cce5b..07abd5d7ebfc10998a3c6140a7a325d752d70b49 100644 (file)
--- a/read-cache.c
+++ b/read-cache.c
@@ -181,6 +181,12 @@ static int ce_match_stat_basic(struct cache_entry *ce, struct stat *st)
        return changed;
 }
 
+static int is_racy_timestamp(struct index_state *istate, struct cache_entry *ce)
+{
+       return (istate->timestamp &&
+               ((unsigned int)istate->timestamp) <= ce->ce_mtime);
+}
+
 int ie_match_stat(struct index_state *istate,
                  struct cache_entry *ce, struct stat *st,
                  unsigned int options)
@@ -214,9 +220,7 @@ int ie_match_stat(struct index_state *istate,
         * whose mtime are the same as the index file timestamp more
         * carefully than others.
         */
-       if (!changed &&
-           istate->timestamp &&
-           istate->timestamp <= ce->ce_mtime) {
+       if (!changed && is_racy_timestamp(istate, ce)) {
                if (assume_racy_is_modified)
                        changed |= DATA_CHANGED;
                else
@@ -1233,8 +1237,7 @@ int write_index(struct index_state *istate, int newfd)
                struct cache_entry *ce = cache[i];
                if (ce->ce_flags & CE_REMOVE)
                        continue;
-               if (istate->timestamp &&
-                   istate->timestamp <= ce->ce_mtime)
+               if (is_racy_timestamp(istate, ce))
                        ce_smudge_racily_clean_entry(ce);
                if (ce_write_entry(&c, newfd, ce) < 0)
                        return -1;