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// Copyright 2016 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef QUICHE_HTTP2_HPACK_HUFFMAN_HPACK_HUFFMAN_ENCODER_H_
#define QUICHE_HTTP2_HPACK_HUFFMAN_HPACK_HUFFMAN_ENCODER_H_
// Functions supporting the encoding of strings using the HPACK-defined Huffman
// table.
#include <cstddef> // For size_t
#include <string>
#include "absl/strings/string_view.h"
#include "net/third_party/quiche/src/common/platform/api/quiche_export.h"
namespace http2 {
// Returns the size of the Huffman encoding of |plain|, which may be greater
// than plain.size().
QUICHE_EXPORT_PRIVATE size_t HuffmanSize(absl::string_view plain);
// Encode the plain text string |plain| with the Huffman encoding defined in the
// HPACK RFC, 7541. |encoded_size| is used to pre-allocate storage and it
// should be the value returned by HuffmanSize(). Appends the result to
// |*huffman|.
QUICHE_EXPORT_PRIVATE void HuffmanEncode(absl::string_view plain,
size_t encoded_size,
std::string* huffman);
// Encode |input| with the Huffman encoding defined RFC7541, used in HPACK and
// QPACK. |encoded_size| must be the value returned by HuffmanSize().
// Appends the result to the end of |*output|.
QUICHE_EXPORT_PRIVATE void HuffmanEncodeFast(absl::string_view input,
size_t encoded_size,
std::string* output);
} // namespace http2
#endif // QUICHE_HTTP2_HPACK_HUFFMAN_HPACK_HUFFMAN_ENCODER_H_