Initial checkin of gRPC to third_party/

third_party/grpc/src/core/transport/transport_op_string.c

Index: third_party/grpc/src/core/transport/transport_op_string.c
diff --git a/third_party/grpc/src/core/transport/transport_op_string.c b/third_party/grpc/src/core/transport/transport_op_string.c
new file mode 100644
index 0000000000000000000000000000000000000000..98b51afc8819a62037cb5fc0a74a314cec3c6847
--- /dev/null
+++ b/third_party/grpc/src/core/transport/transport_op_string.c
@@ -0,0 +1,140 @@
+/*
+ *
+ * Copyright 2015, 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/channel/channel_stack.h"
+
+#include <stdarg.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "src/core/support/string.h"
+#include <grpc/support/alloc.h>
+#include <grpc/support/string_util.h>
+#include <grpc/support/useful.h>
+
+/* These routines are here to facilitate debugging - they produce string
+   representations of various transport data structures */
+
+static void put_metadata(gpr_strvec *b, grpc_mdelem *md) {
+  gpr_strvec_add(b, gpr_strdup("key="));
+  gpr_strvec_add(b,
+                 gpr_dump_slice(md->key->slice, GPR_DUMP_HEX | GPR_DUMP_ASCII));
+
+  gpr_strvec_add(b, gpr_strdup(" value="));
+  gpr_strvec_add(
+      b, gpr_dump_slice(md->value->slice, GPR_DUMP_HEX | GPR_DUMP_ASCII));
+}
+
+static void put_metadata_list(gpr_strvec *b, grpc_metadata_batch md) {
+  grpc_linked_mdelem *m;
+  for (m = md.list.head; m != NULL; m = m->next) {
+    if (m != md.list.head) gpr_strvec_add(b, gpr_strdup(", "));
+    put_metadata(b, m->md);
+  }
+  if (gpr_time_cmp(md.deadline, gpr_inf_future(md.deadline.clock_type)) != 0) {
+    char *tmp;
+    gpr_asprintf(&tmp, " deadline=%lld.%09d", (long long)md.deadline.tv_sec,
+                 (int)md.deadline.tv_nsec);
+    gpr_strvec_add(b, tmp);
+  }
+}
+
+char *grpc_transport_stream_op_string(grpc_transport_stream_op *op) {
+  char *tmp;
+  char *out;
+  int first = 1;
+
+  gpr_strvec b;
+  gpr_strvec_init(&b);
+
+  if (op->send_initial_metadata != NULL) {
+    if (!first) gpr_strvec_add(&b, gpr_strdup(" "));
+    first = 0;
+    gpr_strvec_add(&b, gpr_strdup("SEND_INITIAL_METADATA{"));
+    put_metadata_list(&b, *op->send_initial_metadata);
+    gpr_strvec_add(&b, gpr_strdup("}"));
+  }
+
+  if (op->send_message != NULL) {
+    if (!first) gpr_strvec_add(&b, gpr_strdup(" "));
+    first = 0;
+    gpr_asprintf(&tmp, "SEND_MESSAGE:flags=0x%08x:len=%d",
+                 op->send_message->flags, op->send_message->length);
+    gpr_strvec_add(&b, tmp);
+  }
+
+  if (op->send_trailing_metadata != NULL) {
+    if (!first) gpr_strvec_add(&b, gpr_strdup(" "));
+    first = 0;
+    gpr_strvec_add(&b, gpr_strdup("SEND_TRAILING_METADATA{"));
+    put_metadata_list(&b, *op->send_trailing_metadata);
+    gpr_strvec_add(&b, gpr_strdup("}"));
+  }
+
+  if (op->recv_initial_metadata != NULL) {
+    if (!first) gpr_strvec_add(&b, gpr_strdup(" "));
+    first = 0;
+    gpr_strvec_add(&b, gpr_strdup("RECV_INITIAL_METADATA"));
+  }
+
+  if (op->recv_message != NULL) {
+    if (!first) gpr_strvec_add(&b, gpr_strdup(" "));
+    first = 0;
+    gpr_strvec_add(&b, gpr_strdup("RECV_MESSAGE"));
+  }
+
+  if (op->recv_trailing_metadata != NULL) {
+    if (!first) gpr_strvec_add(&b, gpr_strdup(" "));
+    first = 0;
+    gpr_strvec_add(&b, gpr_strdup("RECV_TRAILING_METADATA"));
+  }
+
+  if (op->cancel_with_status != GRPC_STATUS_OK) {
+    if (!first) gpr_strvec_add(&b, gpr_strdup(" "));
+    first = 0;
+    gpr_asprintf(&tmp, "CANCEL:%d", op->cancel_with_status);
+    gpr_strvec_add(&b, tmp);
+  }
+
+  out = gpr_strvec_flatten(&b, NULL);
+  gpr_strvec_destroy(&b);
+
+  return out;
+}
+
+void grpc_call_log_op(char *file, int line, gpr_log_severity severity,
+                      grpc_call_element *elem, grpc_transport_stream_op *op) {
+  char *str = grpc_transport_stream_op_string(op);
+  gpr_log(file, line, severity, "OP[%s:%p]: %s", elem->filter->name, elem, str);
+  gpr_free(str);
+}