/*
 *
 * 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/ext/transport/chttp2/transport/incoming_metadata.h"

#include <string.h>

#include "src/core/ext/transport/chttp2/transport/internal.h"

#include <grpc/support/alloc.h>
#include <grpc/support/log.h>

grpc_error* grpc_chttp2_incoming_metadata_buffer_add(
    grpc_chttp2_incoming_metadata_buffer* buffer, grpc_mdelem elem) {
  buffer->size += GRPC_MDELEM_LENGTH(elem);
  grpc_linked_mdelem* storage;
  if (buffer->count < buffer->kPreallocatedMDElem) {
    storage = &buffer->preallocated_mdelems[buffer->count];
    buffer->count++;
  } else {
    storage = static_cast<grpc_linked_mdelem*>(
        buffer->arena->Alloc(sizeof(grpc_linked_mdelem)));
  }
  storage->md = elem;
  return grpc_metadata_batch_link_tail(&buffer->batch, storage);
}

grpc_error* grpc_chttp2_incoming_metadata_buffer_replace_or_add(
    grpc_chttp2_incoming_metadata_buffer* buffer, grpc_mdelem elem) {
  for (grpc_linked_mdelem* l = buffer->batch.list.head; l != nullptr;
       l = l->next) {
    if (grpc_slice_eq(GRPC_MDKEY(l->md), GRPC_MDKEY(elem))) {
      GRPC_MDELEM_UNREF(l->md);
      l->md = elem;
      return GRPC_ERROR_NONE;
    }
  }
  return grpc_chttp2_incoming_metadata_buffer_add(buffer, elem);
}

void grpc_chttp2_incoming_metadata_buffer_set_deadline(
    grpc_chttp2_incoming_metadata_buffer* buffer, grpc_millis deadline) {
  buffer->batch.deadline = deadline;
}

void grpc_chttp2_incoming_metadata_buffer_publish(
    grpc_chttp2_incoming_metadata_buffer* buffer, grpc_metadata_batch* batch) {
  grpc_metadata_batch_move(&buffer->batch, batch);
}
