commit 125590f9d5ebc53271846401d6087e47eced9897
author Mark D. Roth <roth@google.com> Mon May 02 07:37:16 2016 -0700
committer Mark D. Roth <roth@google.com> Mon May 02 07:37:16 2016 -0700
tree 7e10663577573234d818f50c8aca410d4abf37f6
parent 00598719bcf40a95505f2deeb53906c5944373fd

Add grpc_metadata_batch_size() function.

src/core/lib/transport/metadata.h

diff --git a/src/core/lib/transport/metadata.h b/src/core/lib/transport/metadata.h
index 77c32c7..4ecbbd1 100644
--- a/src/core/lib/transport/metadata.h
+++ b/src/core/lib/transport/metadata.h
@@ -148,8 +148,8 @@
 #define GRPC_MDSTR_LENGTH(s) (GPR_SLICE_LENGTH(s->slice))
 
 /* We add 32 bytes of padding as per RFC-7540 section 6.5.2. */
-#define GRPC_MDELEM_LENGTH(e) (GRPC_MDSTR_LENGTH(e->key) + \
-                               GRPC_MDSTR_LENGTH(e->value) + 32)
+#define GRPC_MDELEM_LENGTH(e) (GRPC_MDSTR_LENGTH((e)->key) + \
+                               GRPC_MDSTR_LENGTH((e)->value) + 32)
 
 int grpc_mdstr_is_legal_header(grpc_mdstr *s);
 int grpc_mdstr_is_legal_nonbin_header(grpc_mdstr *s);

src/core/lib/transport/metadata_batch.c

diff --git a/src/core/lib/transport/metadata_batch.c b/src/core/lib/transport/metadata_batch.c
index 4567221..4e1cd8e 100644
--- a/src/core/lib/transport/metadata_batch.c
+++ b/src/core/lib/transport/metadata_batch.c
@@ -192,3 +192,12 @@
          gpr_time_cmp(gpr_inf_future(batch->deadline.clock_type),
                       batch->deadline) == 0;
 }
+
+size_t grpc_metadata_batch_size(grpc_metadata_batch *batch) {
+  size_t size = 0;
+  for (grpc_linked_mdelem* elem = batch->list.head;
+       elem != NULL; elem = elem->next) {
+    size += GRPC_MDELEM_LENGTH(elem->md);
+  }
+  return size;
+}

src/core/lib/transport/metadata_batch.h

diff --git a/src/core/lib/transport/metadata_batch.h b/src/core/lib/transport/metadata_batch.h
index b626688..7af823f 100644
--- a/src/core/lib/transport/metadata_batch.h
+++ b/src/core/lib/transport/metadata_batch.h
@@ -66,6 +66,9 @@
 void grpc_metadata_batch_clear(grpc_metadata_batch *batch);
 int grpc_metadata_batch_is_empty(grpc_metadata_batch *batch);
 
+/* Returns the transport size of the batch. */
+size_t grpc_metadata_batch_size(grpc_metadata_batch *batch);
+
 /** Moves the metadata information from \a src to \a dst. Upon return, \a src is
  * zeroed. */
 void grpc_metadata_batch_move(grpc_metadata_batch *dst,