time_print: new library, function time_print()

Implements error checking for the gmtime_r() call, which was missing
in two code locations.

Makefile.am

@@ -186,6 +186,7 @@ mpd_headers = \
 	src/replay_gain_info.h \
 	src/replay_gain_ape.h \
 	src/sig_handlers.h \
+	src/time_print.c src/time_print.h \
 	src/song.h \
 	src/song_print.h \
 	src/song_save.h \

src/DatabasePrint.cxx

@@ -27,6 +27,7 @@ extern "C" {
 #include "client.h"
 #include "song.h"
 #include "song_print.h"
+#include "time_print.h"
 #include "playlist_vector.h"
 #include "tag.h"
 }
@@ -105,21 +106,7 @@ PrintPlaylistFull(struct client *client,
 {
 	print_playlist_in_directory(client, directory, playlist.name);
 
-#ifndef G_OS_WIN32
-	struct tm tm;
-#endif
-	char timestamp[32];
-	time_t t = playlist.mtime;
-	strftime(timestamp, sizeof(timestamp),
-#ifdef G_OS_WIN32
-		 "%Y-%m-%dT%H:%M:%SZ",
-		 gmtime(&t)
-#else
-		 "%FT%TZ",
-		 gmtime_r(&t, &tm)
-#endif
-		 );
-	client_printf(client, "Last-Modified: %s\n", timestamp);
+	time_print(client, "Last-Modified", playlist.mtime);
 
 	return true;
 }

src/command.c

@@ -30,6 +30,7 @@
 #include "playlist_queue.h"
 #include "playlist_error.h"
 #include "queue_print.h"
+#include "time_print.h"
 #include "ls.h"
 #include "uri.h"
 #include "decoder_print.h"
@@ -115,25 +116,10 @@ print_spl_list(struct client *client, GPtrArray *list)
 	for (unsigned i = 0; i < list->len; ++i) {
 		struct stored_playlist_info *playlist =
 			g_ptr_array_index(list, i);
-		time_t t;
-#ifndef WIN32
-		struct tm tm;
-#endif
-		char timestamp[32];
 
 		client_printf(client, "playlist: %s\n", playlist->name);
 
-		t = playlist->mtime;
-		strftime(timestamp, sizeof(timestamp),
-#ifdef G_OS_WIN32
-			 "%Y-%m-%dT%H:%M:%SZ",
-			 gmtime(&t)
-#else
-			 "%FT%TZ",
-			 gmtime_r(&t, &tm)
-#endif
-			 );
-		client_printf(client, "Last-Modified: %s\n", timestamp);
+		time_print(client, "Last-Modified", playlist->mtime);
 	}
 }
 

src/song_print.c

@@ -19,6 +19,7 @@
 
 #include "config.h"
 #include "song_print.h"
+#include "time_print.h"
 #include "song.h"
 #include "directory.h"
 #include "tag_print.h"
@@ -63,32 +64,8 @@ song_print_info(struct client *client, struct song *song)
 			      song->start_ms / 1000,
 			      song->start_ms % 1000);
 
-	if (song->mtime > 0) {
-#ifndef G_OS_WIN32
-		struct tm tm;
-#endif
-		const struct tm *tm2;
-
-#ifdef G_OS_WIN32
-		tm2 = gmtime(&song->mtime);
-#else
-		tm2 = gmtime_r(&song->mtime, &tm);
-#endif
-
-		if (tm2 != NULL) {
-			char timestamp[32];
-
-			strftime(timestamp, sizeof(timestamp),
-#ifdef G_OS_WIN32
-				 "%Y-%m-%dT%H:%M:%SZ",
-#else
-				 "%FT%TZ",
-#endif
-				 tm2);
-			client_printf(client, "Last-Modified: %s\n",
-				      timestamp);
-		}
-	}
+	if (song->mtime > 0)
+		time_print(client, "Last-Modified", song->mtime);
 
 	if (song->tag)
 		tag_print(client, song->tag);

src/time_print.c

@@ -0,0 +1,47 @@
+/*
+ * Copyright (C) 2003-2011 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "config.h"
+#include "time_print.h"
+#include "client.h"
+
+#include <glib.h>
+
+void
+time_print(struct client *client, const char *name, time_t t)
+{
+#ifdef G_OS_WIN32
+	const struct tm *tm2 = gmtime(&t);
+#else
+	struct tm tm;
+	const struct tm *tm2 = gmtime_r(&t, &tm);
+#endif
+	if (tm2 == NULL)
+		return;
+
+	char buffer[32];
+	strftime(buffer, sizeof(buffer),
+#ifdef G_OS_WIN32
+		 "%Y-%m-%dT%H:%M:%SZ",
+#else
+		 "%FT%TZ",
+#endif
+		 tm2);
+	client_printf(client, "%s: %s\n", name, buffer);
+}

src/time_print.h

@@ -0,0 +1,33 @@
+/*
+ * Copyright (C) 2003-2011 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef MPD_TIME_PRINT_H
+#define MPD_TIME_PRINT_H
+
+#include <time.h>
+
+struct client;
+
+/**
+ * Write a line with a time stamp to the client.
+ */
+void
+time_print(struct client *client, const char *name, time_t t);
+
+#endif