/*
 *
 * Copyright 2017 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.
 *
 */

#ifndef GRPC_CORE_LIB_SURFACE_VALIDATE_METADATA_H
#define GRPC_CORE_LIB_SURFACE_VALIDATE_METADATA_H

#include <grpc/support/port_platform.h>

#include <grpc/slice.h>
#include "src/core/lib/iomgr/error.h"

grpc_error* grpc_validate_header_key_is_legal(const grpc_slice& slice);
grpc_error* grpc_validate_header_nonbin_value_is_legal(const grpc_slice& slice);

int grpc_is_binary_header_internal(const grpc_slice& slice);
inline int grpc_key_is_binary_header(const uint8_t* buf, size_t length) {
  if (length < 5) return 0;
  return 0 == memcmp(buf + length - 4, "-bin", 4);
}
inline int grpc_is_refcounted_slice_binary_header(const grpc_slice& slice) {
  GPR_DEBUG_ASSERT(slice.refcount != nullptr);
  return grpc_key_is_binary_header(slice.data.refcounted.bytes,
                                   slice.data.refcounted.length);
}

#endif /* GRPC_CORE_LIB_SURFACE_VALIDATE_METADATA_H */