Sanitize for_each_reflog_ent()

It used to ignore the return value of the helper function; now, it
expects it to return 0, and stops iteration upon non-zero return
values; this value is then passed on as the return value of
for_each_reflog_ent().

Further, it makes no sense to force the parsing upon the helper
functions; for_each_reflog_ent() now calls the helper function with
old and new sha1, the email, the timestamp & timezone, and the message.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <junkio@cox.net>

6 files changed, 44 insertions, 24 deletions

diff --git a/builtin-reflog.c b/builtin-reflog.c
index a967117661..ca22452e64 100644
--- a/builtin-reflog.c
+++ b/builtin-reflog.c
@@ -195,19 +195,12 @@ static int keep_entry(struct commit **it, unsigned char *sha1)
 }
 
 static int expire_reflog_ent(unsigned char *osha1, unsigned char *nsha1,
-			     char *data, void *cb_data)
+		const char *email, unsigned long timestamp, int tz,
+		const char *message, void *cb_data)
 {
 	struct expire_reflog_cb *cb = cb_data;
-	unsigned long timestamp;
-	char *cp, *ep;
 	struct commit *old, *new;
 
-	cp = strchr(data, '>');
-	if (!cp || *++cp != ' ')
-		goto prune;
-	timestamp = strtoul(cp, &ep, 10);
-	if (*ep != ' ')
-		goto prune;
 	if (timestamp < cb->cmd->expire_total)
 		goto prune;
 
@@ -221,15 +214,20 @@ static int expire_reflog_ent(unsigned char *osha1, unsigned char *nsha1,
 	     (new && !in_merge_bases(new, cb->ref_commit))))
 		goto prune;
 
-	if (cb->newlog)
-		fprintf(cb->newlog, "%s %s %s",
-			sha1_to_hex(osha1), sha1_to_hex(nsha1), data);
+	if (cb->newlog) {
+		char sign = (tz < 0) ? '-' : '+';
+		int zone = (tz < 0) ? (-tz) : tz;
+		fprintf(cb->newlog, "%s %s %s %lu %c%04d\t%s",
+			sha1_to_hex(osha1), sha1_to_hex(nsha1),
+			email, timestamp, sign, zone,
+			message);
+	}
 	if (cb->cmd->verbose)
-		printf("keep %s", data);
+		printf("keep %s", message);
 	return 0;
  prune:
 	if (!cb->newlog || cb->cmd->verbose)
-		printf("%sprune %s", cb->newlog ? "" : "would ", data);
+		printf("%sprune %s", cb->newlog ? "" : "would ", message);
 	return 0;
 }
 
diff --git a/fsck-objects.c b/fsck-objects.c
index 1cc3b399bc..0d8a8ebb46 100644
--- a/fsck-objects.c
+++ b/fsck-objects.c
@@ -399,7 +399,9 @@ static void fsck_dir(int i, char *path)
 
 static int default_refs;
 
-static int fsck_handle_reflog_ent(unsigned char *osha1, unsigned char *nsha1, char *datail, void *cb_data)
+static int fsck_handle_reflog_ent(unsigned char *osha1, unsigned char *nsha1,
+		const char *email, unsigned long timestamp, int tz,
+		const char *message, void *cb_data)
 {
 	struct object *obj;
 
diff --git a/reachable.c b/reachable.c
index 4dfee1dbe8..a6a334822a 100644
--- a/reachable.c
+++ b/reachable.c
@@ -104,7 +104,9 @@ static void walk_commit_list(struct rev_info *revs)
 	}
 }
 
-static int add_one_reflog_ent(unsigned char *osha1, unsigned char *nsha1, char *datail, void *cb_data)
+static int add_one_reflog_ent(unsigned char *osha1, unsigned char *nsha1,
+		const char *email, unsigned long timestamp, int tz,
+		const char *message, void *cb_data)
 {
 	struct object *object;
 	struct rev_info *revs = (struct rev_info *)cb_data;
diff --git a/refs.c b/refs.c
index 4d6fad8879..d189d8ad99 100644
--- a/refs.c
+++ b/refs.c
@@ -1097,7 +1097,7 @@ int read_ref_at(const char *ref, unsigned long at_time, int cnt, unsigned char *
 	return 0;
 }
 
-void for_each_reflog_ent(const char *ref, each_reflog_ent_fn fn, void *cb_data)
+int for_each_reflog_ent(const char *ref, each_reflog_ent_fn fn, void *cb_data)
 {
 	const char *logfile;
 	FILE *logfp;
@@ -1106,19 +1106,35 @@ void for_each_reflog_ent(const char *ref, each_reflog_ent_fn fn, void *cb_data)
 	logfile = git_path("logs/%s", ref);
 	logfp = fopen(logfile, "r");
 	if (!logfp)
-		return;
+		return -1;
 	while (fgets(buf, sizeof(buf), logfp)) {
 		unsigned char osha1[20], nsha1[20];
-		int len;
+		char *email_end, *message;
+		unsigned long timestamp;
+		int len, ret, tz;
 
 		/* old SP new SP name <email> SP time TAB msg LF */
 		len = strlen(buf);
 		if (len < 83 || buf[len-1] != '\n' ||
 		    get_sha1_hex(buf, osha1) || buf[40] != ' ' ||
-		    get_sha1_hex(buf + 41, nsha1) || buf[81] != ' ')
+		    get_sha1_hex(buf + 41, nsha1) || buf[81] != ' ' ||
+		    !(email_end = strchr(buf + 82, '>')) ||
+		    email_end[1] != ' ' ||
+		    !(timestamp = strtoul(email_end + 2, &message, 10)) ||
+		    !message || message[0] != ' ' ||
+		    (message[1] != '+' && message[1] != '-') ||
+		    !isdigit(message[2]) || !isdigit(message[3]) ||
+		    !isdigit(message[4]) || !isdigit(message[5]) ||
+		    message[6] != '\t')
 			continue; /* corrupt? */
-		fn(osha1, nsha1, buf+82, cb_data);
+		email_end[1] = '\0';
+		tz = strtol(message + 1, NULL, 10);
+		message += 7;
+		ret = fn(osha1, nsha1, buf+82, timestamp, tz, message, cb_data);
+		if (ret)
+			return ret;
 	}
 	fclose(logfp);
+	return 0;
 }
 
diff --git a/refs.h b/refs.h
index de43cc768a..0e877e82ee 100644
--- a/refs.h
+++ b/refs.h
@@ -45,8 +45,8 @@ extern int write_ref_sha1(struct ref_lock *lock, const unsigned char *sha1, cons
 extern int read_ref_at(const char *ref, unsigned long at_time, int cnt, unsigned char *sha1);
 
 /* iterate over reflog entries */
-typedef int each_reflog_ent_fn(unsigned char *osha1, unsigned char *nsha1, char *, void *);
-void for_each_reflog_ent(const char *ref, each_reflog_ent_fn fn, void *cb_data);
+typedef int each_reflog_ent_fn(unsigned char *osha1, unsigned char *nsha1, const char *, unsigned long, int, const char *, void *);
+int for_each_reflog_ent(const char *ref, each_reflog_ent_fn fn, void *cb_data);
 
 /** Returns 0 if target has the right format for a ref. **/
 extern int check_ref_format(const char *target);
diff --git a/revision.c b/revision.c
index 6e4ec46302..1e3b29a429 100644
--- a/revision.c
+++ b/revision.c
@@ -505,7 +505,9 @@ static void handle_one_reflog_commit(unsigned char *sha1, void *cb_data)
 	}
 }
 
-static int handle_one_reflog_ent(unsigned char *osha1, unsigned char *nsha1, char *detail, void *cb_data)
+static int handle_one_reflog_ent(unsigned char *osha1, unsigned char *nsha1,
+		const char *email, unsigned long timestamp, int tz,
+		const char *message, void *cb_data)
 {
 	handle_one_reflog_commit(osha1, cb_data);
 	handle_one_reflog_commit(nsha1, cb_data);