refs.c: constify the sha arguments for ref_transaction_create|delete|update

ref_transaction_create|delete|update has no need to modify the sha1
arguments passed to it so it should use const unsigned char* instead
of unsigned char*.

Some functions, such as fast_forward_to(), already have its old/new
sha1 arguments as consts. This function will at some point need to
use ref_transaction_update() in which case this change is required.

Reviewed-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Ronnie Sahlberg <sahlberg@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Acked-by: Michael Haggerty <mhagger@alum.mit.edu>

diff --git a/refs.c b/refs.c
index d9cac6db18da868a1fedf2e2a5f1a0c1bad2bf20..21ed46534ab81aa966860a8eaad6e499d9e2b2c3 100644 (file)
--- a/refs.c
+++ b/refs.c
@@ -3359,7 +3359,8 @@ static struct ref_update *add_update(struct ref_transaction *transaction,
 
 void ref_transaction_update(struct ref_transaction *transaction,
                            const char *refname,
-                           unsigned char *new_sha1, unsigned char *old_sha1,
+                           const unsigned char *new_sha1,
+                           const unsigned char *old_sha1,
                            int flags, int have_old)
 {
        struct ref_update *update = add_update(transaction, refname);
@@ -3373,7 +3374,7 @@ void ref_transaction_update(struct ref_transaction *transaction,
 
 void ref_transaction_create(struct ref_transaction *transaction,
                            const char *refname,
-                           unsigned char *new_sha1,
+                           const unsigned char *new_sha1,
                            int flags)
 {
        struct ref_update *update = add_update(transaction, refname);
@@ -3387,7 +3388,7 @@ void ref_transaction_create(struct ref_transaction *transaction,
 
 void ref_transaction_delete(struct ref_transaction *transaction,
                            const char *refname,
-                           unsigned char *old_sha1,
+                           const unsigned char *old_sha1,
                            int flags, int have_old)
 {
        struct ref_update *update = add_update(transaction, refname);

diff --git a/refs.h b/refs.h
index 7d946f6b8ba21fa9f5bda02641a538411eecd0d3..8c7f9c44dcab7fb07b49ee1a4a1867f18e062023 100644 (file)
--- a/refs.h
+++ b/refs.h
@@ -240,7 +240,8 @@ struct ref_transaction *ref_transaction_begin(void);
  */
 void ref_transaction_update(struct ref_transaction *transaction,
                            const char *refname,
-                           unsigned char *new_sha1, unsigned char *old_sha1,
+                           const unsigned char *new_sha1,
+                           const unsigned char *old_sha1,
                            int flags, int have_old);
 
 /*
@@ -251,7 +252,7 @@ void ref_transaction_update(struct ref_transaction *transaction,
  */
 void ref_transaction_create(struct ref_transaction *transaction,
                            const char *refname,
-                           unsigned char *new_sha1,
+                           const unsigned char *new_sha1,
                            int flags);
 
 /*
@@ -261,7 +262,7 @@ void ref_transaction_create(struct ref_transaction *transaction,
  */
 void ref_transaction_delete(struct ref_transaction *transaction,
                            const char *refname,
-                           unsigned char *old_sha1,
+                           const unsigned char *old_sha1,
                            int flags, int have_old);
 
 /*