for_each_reflog_ent(): extract a helper to process a single entry

Split the logic that takes a single line of reflog entry in a
strbuf, parses the message, and calls the callback function out of
the loop into a separate helper function.

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

refs.c

@@ -2290,6 +2290,34 @@ int read_ref_at(const char *refname, unsigned long at_time, int cnt,
 	return 1;
 }
 
+static int show_one_reflog_ent(struct strbuf *sb, each_reflog_ent_fn fn, void *cb_data)
+{
+	unsigned char osha1[20], nsha1[20];
+	char *email_end, *message;
+	unsigned long timestamp;
+	int tz;
+
+	/* old SP new SP name <email> SP time TAB msg LF */
+	if (sb->len < 83 || sb->buf[sb->len - 1] != '\n' ||
+	    get_sha1_hex(sb->buf, osha1) || sb->buf[40] != ' ' ||
+	    get_sha1_hex(sb->buf + 41, nsha1) || sb->buf[81] != ' ' ||
+	    !(email_end = strchr(sb->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]))
+		return 0; /* corrupt? */
+	email_end[1] = '\0';
+	tz = strtol(message + 1, NULL, 10);
+	if (message[6] != '\t')
+		message += 6;
+	else
+		message += 7;
+	return fn(osha1, nsha1, sb->buf + 82, timestamp, tz, message, cb_data);
+}
+
 int for_each_recent_reflog_ent(const char *refname, each_reflog_ent_fn fn, long ofs, void *cb_data)
 {
 	const char *logfile;
@@ -2314,35 +2342,8 @@ int for_each_recent_reflog_ent(const char *refname, each_reflog_ent_fn fn, long
 		}
 	}
 
-	while (!strbuf_getwholeline(&sb, logfp, '\n')) {
-		unsigned char osha1[20], nsha1[20];
-		char *email_end, *message;
-		unsigned long timestamp;
-		int tz;
-
-		/* old SP new SP name <email> SP time TAB msg LF */
-		if (sb.len < 83 || sb.buf[sb.len - 1] != '\n' ||
-		    get_sha1_hex(sb.buf, osha1) || sb.buf[40] != ' ' ||
-		    get_sha1_hex(sb.buf + 41, nsha1) || sb.buf[81] != ' ' ||
-		    !(email_end = strchr(sb.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]))
-			continue; /* corrupt? */
-		email_end[1] = '\0';
-		tz = strtol(message + 1, NULL, 10);
-		if (message[6] != '\t')
-			message += 6;
-		else
-			message += 7;
-		ret = fn(osha1, nsha1, sb.buf + 82, timestamp, tz, message,
-			 cb_data);
-		if (ret)
-			break;
-	}
+	while (!ret && !strbuf_getwholeline(&sb, logfp, '\n'))
+		ret = show_one_reflog_ent(&sb, fn, cb_data);
 	fclose(logfp);
 	strbuf_release(&sb);
 	return ret;