[PATCH 1/3] read-cache: factor out cache entries reading code

[Nguyễn Thái Ngọc Duy <pclouds@xxxxxxxxx>]

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@xxxxxxxxx>
---
 read-cache.c |   32 ++++++++++++++++++++------------
 1 files changed, 20 insertions(+), 12 deletions(-)

diff --git a/read-cache.c b/read-cache.c
index a51bba1..2dbf923 100644
--- a/read-cache.c
+++ b/read-cache.c
@@ -1273,10 +1273,28 @@ static struct cache_entry *create_from_disk(struct ondisk_cache_entry *ondisk)
 	return ce;
 }
 
+static int read_cache_entries(struct index_state *istate,
+			      const char *mmap, unsigned long src_offset)
+{
+	const char *buf = mmap + src_offset;
+	int i;
+
+	for (i = 0; i < istate->cache_nr; i++) {
+		struct ondisk_cache_entry *disk_ce;
+		struct cache_entry *ce;
+
+		disk_ce = (struct ondisk_cache_entry *)buf;
+		ce = create_from_disk(disk_ce);
+		set_index_entry(istate, i, ce);
+		buf += ondisk_ce_size(ce);
+	}
+	return buf - mmap;
+}
+
 /* remember to discard_cache() before reading a different cache! */
 int read_index_from(struct index_state *istate, const char *path)
 {
-	int fd, i;
+	int fd;
 	struct stat st;
 	unsigned long src_offset;
 	struct cache_header *hdr;
@@ -1319,17 +1337,7 @@ int read_index_from(struct index_state *istate, const char *path)
 	istate->cache = xcalloc(istate->cache_alloc, sizeof(struct cache_entry *));
 	istate->initialized = 1;
 
-	src_offset = sizeof(*hdr);
-	for (i = 0; i < istate->cache_nr; i++) {
-		struct ondisk_cache_entry *disk_ce;
-		struct cache_entry *ce;
-
-		disk_ce = (struct ondisk_cache_entry *)((char *)mmap + src_offset);
-		ce = create_from_disk(disk_ce);
-		set_index_entry(istate, i, ce);
-
-		src_offset += ondisk_ce_size(ce);
-	}
+	src_offset = read_cache_entries(istate, mmap, sizeof(*hdr));
 	istate->timestamp.sec = st.st_mtime;
 	istate->timestamp.nsec = ST_MTIME_NSEC(st);
 
-- 
1.7.8.36.g69ee2

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