midx: mark `get_midx_checksum()` arguments as const

To make clear that the fucntion `get_midx_checksum()` does not do
anything to modify its argument, mark the MIDX pointer as const.

The following commit will rename this function altogether to make clear
that it returns the raw bytes of the checksum, not a hex-encoded copy of
it.

Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/midx.c b/midx.c
index 24e1e721754d0cbffed53d7545f12bca77d157bd..6c01f0fa522f70effe99ceb2ba8b9ec92d40bed6 100644 (file)
--- a/midx.c
+++ b/midx.c
@@ -24,7 +24,7 @@ void clear_incremental_midx_files_ext(struct odb_source *source, const char *ext
 int cmp_idx_or_pack_name(const char *idx_or_pack_name,
                         const char *idx_name);
 
-const unsigned char *get_midx_checksum(struct multi_pack_index *m)
+const unsigned char *get_midx_checksum(const struct multi_pack_index *m)
 {
        return m->data + m->data_len - m->source->odb->repo->hash_algo->rawsz;
 }

diff --git a/midx.h b/midx.h
index 6e54d73503d56088923ceff1c69e1f8d6013ac12..7c7e0b5912151b46455e386baa78418f20f26c4f 100644 (file)
--- a/midx.h
+++ b/midx.h
@@ -85,7 +85,7 @@ struct multi_pack_index {
 #define MIDX_EXT_BITMAP "bitmap"
 #define MIDX_EXT_MIDX "midx"
 
-const unsigned char *get_midx_checksum(struct multi_pack_index *m);
+const unsigned char *get_midx_checksum(const struct multi_pack_index *m);
 void get_midx_filename(struct odb_source *source, struct strbuf *out);
 void get_midx_filename_ext(struct odb_source *source, struct strbuf *out,
                           const unsigned char *hash, const char *ext);