/*

 * Copyright (c) 2015-2019 Spotify AB

 *

 * 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 <spotify/json/detail/escape.hpp>

#include <cstring>

#include <spotify/json/detail/macros.hpp>

#include "escape_common.hpp"

namespace spotify {

namespace json {

namespace detail {

#if defined(json_arch_x86_sse42)

void write_escaped_sse42(encode_context &context, const char *begin, const char *end);

#endif  // defined(json_arch_x86_sse42)

void write_escaped_scalar(encode_context &context, const char *begin, const char *end) {

  const auto buf = context.reserve(6 * (end - begin));  // 6 is the length of \u00xx

  auto ptr = buf;

  if (json_unaligned_2(begin) && (end - begin) >= 1) { write_escaped_1(ptr, begin); }

  if (json_unaligned_4(begin) && (end - begin) >= 2) { write_escaped_2(ptr, begin); }

  if (json_unaligned_8(begin) && (end - begin) >= 4) { write_escaped_4(ptr, begin); }

  while ((end - begin) >= 8) { write_escaped_8(ptr, begin); }

  if    ((end - begin) >= 4) { write_escaped_4(ptr, begin); }

  if    ((end - begin) >= 2) { write_escaped_2(ptr, begin); }

  if    ((end - begin) >= 1) { write_escaped_1(ptr, begin); }

  context.advance(ptr - buf);

}

void write_escaped(encode_context &context, const char *begin, const char *end) {

#if defined(json_arch_x86_sse42)

  if (json_likely(context.has_sse42)) {

    return write_escaped_sse42(context, begin, end);

  }

#endif  // defined(json_arch_x86_sse42)

  write_escaped_scalar(context, begin, end);

}

}  // namespace detail

}  // namespace json

}  // namespace spotify