implement the GET_LOG_MARKERS IPC request/reply

src/ipc.c

@@ -612,6 +612,48 @@ IPC_HANDLER(get_bar_config) {
     y(free);
 }
 
+/*
+ * Formats the reply message for a GET_LOG_MARKERS request and sends it to the
+ * client.
+ *
+ */
+IPC_HANDLER(get_log_markers) {
+#if YAJL_MAJOR >= 2
+    yajl_gen gen = yajl_gen_alloc(NULL);
+#else
+    yajl_gen gen = yajl_gen_alloc(NULL, NULL);
+#endif
+
+    int offset_next_write, offset_last_wrap, logsize;
+    get_log_markers(&offset_next_write, &offset_last_wrap, &logsize);
+
+    y(map_open);
+    ystr("offset_next_write");
+    y(integer, offset_next_write);
+
+    ystr("offset_last_wrap");
+    y(integer, offset_last_wrap);
+
+    ystr("shmname");
+    ystr(shmlogname);
+
+    ystr("size");
+    y(integer, logsize);
+
+    y(map_close);
+
+    const unsigned char *payload;
+#if YAJL_MAJOR >= 2
+    size_t length;
+#else
+    unsigned int length;
+#endif
+    y(get_buf, &payload, &length);
+
+    ipc_send_message(fd, length, I3_IPC_REPLY_TYPE_LOG_MARKERS, payload);
+    y(free);
+}
+
 /*
  * Callback for the YAJL parser (will be called when a string is parsed).
  *
@@ -697,14 +739,15 @@ IPC_HANDLER(subscribe) {
 
 /* The index of each callback function corresponds to the numeric
  * value of the message type (see include/i3/ipc.h) */
-handler_t handlers[7] = {
+handler_t handlers[8] = {
     handle_command,
     handle_get_workspaces,
     handle_subscribe,
     handle_get_outputs,
     handle_tree,
     handle_get_marks,
-    handle_get_bar_config
+    handle_get_bar_config,
+    handle_get_log_markers
 };
 
 /*