--- /dev/null
+/*
+ *
+ * Copyright 2015 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+#include <grpc/support/port_platform.h>
+
+#include "src/core/lib/security/credentials/credentials.h"
+
+#include <grpc/support/alloc.h>
+
+#include <string.h>
+
+#include "src/core/lib/slice/slice_internal.h"
+
+static void mdelem_list_ensure_capacity(grpc_credentials_mdelem_array* list,
+ size_t additional_space_needed) {
+ size_t target_size = list->size + additional_space_needed;
+ // Find the next power of two greater than the target size (i.e.,
+ // whenever we add more space, we double what we already have).
+ size_t new_size = 2;
+ while (new_size < target_size) {
+ new_size *= 2;
+ }
+ list->md = static_cast<grpc_mdelem*>(
+ gpr_realloc(list->md, sizeof(grpc_mdelem) * new_size));
+}
+
+void grpc_credentials_mdelem_array_add(grpc_credentials_mdelem_array* list,
+ grpc_mdelem md) {
+ mdelem_list_ensure_capacity(list, 1);
+ list->md[list->size++] = GRPC_MDELEM_REF(md);
+}
+
+void grpc_credentials_mdelem_array_append(grpc_credentials_mdelem_array* dst,
+ grpc_credentials_mdelem_array* src) {
+ mdelem_list_ensure_capacity(dst, src->size);
+ for (size_t i = 0; i < src->size; ++i) {
+ dst->md[dst->size++] = GRPC_MDELEM_REF(src->md[i]);
+ }
+}
+
+void grpc_credentials_mdelem_array_destroy(
+ grpc_credentials_mdelem_array* list) {
+ for (size_t i = 0; i < list->size; ++i) {
+ GRPC_MDELEM_UNREF(list->md[i]);
+ }
+ gpr_free(list->md);
+}