1 files changed, 119 insertions, 0 deletions
diff --git a/src/core/surface/event_string.c b/src/core/surface/event_string.c
new file mode 100644
index 0000000000..0a6a81d18e
--- /dev/null
+++ b/src/core/surface/event_string.c
@@ -0,0 +1,119 @@
+/*
+ *
+ * Copyright 2014, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "src/core/surface/event_string.h"
+
+#include <stdio.h>
+
+#include <grpc/support/string.h>
+#include <grpc/byte_buffer.h>
+
+static size_t addhdr(char *p, grpc_event *ev) {
+  return sprintf(p, "tag:%p call:%p", ev->tag, (void *)ev->call);
+}
+
+static const char *errstr(grpc_op_error err) {
+  switch (err) {
+    case GRPC_OP_OK:
+      return "OK";
+    case GRPC_OP_ERROR:
+      return "ERROR";
+  }
+  return "UNKNOWN_UNKNOWN";
+}
+
+static size_t adderr(char *p, grpc_op_error err) {
+  return sprintf(p, " err=%s", errstr(err));
+}
+
+char *grpc_event_string(grpc_event *ev) {
+  char buffer[1024];
+  char *p = buffer;
+
+  if (ev == NULL) return gpr_strdup("null");
+
+  switch (ev->type) {
+    case GRPC_QUEUE_SHUTDOWN:
+      p += sprintf(p, "QUEUE_SHUTDOWN");
+      break;
+    case GRPC_READ:
+      p += sprintf(p, "READ: ");
+      p += addhdr(p, ev);
+      if (ev->data.read) {
+        p += sprintf(p, " %d bytes",
+                     (int)grpc_byte_buffer_length(ev->data.read));
+      } else {
+        p += sprintf(p, " end-of-stream");
+      }
+      break;
+    case GRPC_INVOKE_ACCEPTED:
+      p += sprintf(p, "INVOKE_ACCEPTED: ");
+      p += addhdr(p, ev);
+      p += adderr(p, ev->data.invoke_accepted);
+      break;
+    case GRPC_WRITE_ACCEPTED:
+      p += sprintf(p, "WRITE_ACCEPTED: ");
+      p += addhdr(p, ev);
+      p += adderr(p, ev->data.write_accepted);
+      break;
+    case GRPC_FINISH_ACCEPTED:
+      p += sprintf(p, "FINISH_ACCEPTED: ");
+      p += addhdr(p, ev);
+      p += adderr(p, ev->data.write_accepted);
+      break;
+    case GRPC_CLIENT_METADATA_READ:
+      p += sprintf(p, "CLIENT_METADATA_READ: ");
+      p += addhdr(p, ev);
+      p += sprintf(p, " %d elements", (int)ev->data.client_metadata_read.count);
+      break;
+    case GRPC_FINISHED:
+      p += sprintf(p, "FINISHED: ");
+      p += addhdr(p, ev);
+      p += sprintf(p, " status_code=%d details='%s'", ev->data.finished.code,
+                   ev->data.finished.details);
+      break;
+    case GRPC_SERVER_RPC_NEW:
+      p += sprintf(p, "SERVER_RPC_NEW: ");
+      p += addhdr(p, ev);
+      p += sprintf(p, " method='%s' host='%s' %d metadata elements",
+                   ev->data.server_rpc_new.method, ev->data.server_rpc_new.host,
+                   (int)ev->data.server_rpc_new.metadata_count);
+      break;
+    case GRPC_COMPLETION_DO_NOT_USE:
+      p += sprintf(p, "DO_NOT_USE (this is a bug)");
+      p += addhdr(p, ev);
+      break;
+  }
+
+  return gpr_strdup(buffer);
+}