Split net/spdy into core and chromium subdirectories.

net/spdy/fuzzing/hpack_fuzz_util.h

-// Copyright 2014 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 NET_SPDY_FUZZING_HPACK_FUZZ_UTIL_H_
-#define NET_SPDY_FUZZING_HPACK_FUZZ_UTIL_H_
-
-#include <stddef.h>
-#include <stdint.h>
-
-#include <memory>
-#include <vector>
-
-#include "net/base/net_export.h"
-#include "net/spdy/hpack/hpack_decoder.h"
-#include "net/spdy/hpack/hpack_encoder.h"
-#include "net/spdy/platform/api/spdy_string.h"
-#include "net/spdy/platform/api/spdy_string_piece.h"
-
-namespace net {
-
-class NET_EXPORT_PRIVATE HpackFuzzUtil {
- public:
-  // A GeneratorContext holds ordered header names & values which are
-  // initially seeded and then expanded with dynamically generated data.
-  struct NET_EXPORT_PRIVATE GeneratorContext {
-    GeneratorContext();
-    ~GeneratorContext();
-    std::vector<SpdyString> names;
-    std::vector<SpdyString> values;
-  };
-
-  // Initializes a GeneratorContext with a random seed and name/value fixtures.
-  static void InitializeGeneratorContext(GeneratorContext* context);
-
-  // Generates a header set from the generator context.
-  static SpdyHeaderBlock NextGeneratedHeaderSet(GeneratorContext* context);
-
-  // Samples a size from the exponential distribution with mean |mean|,
-  // upper-bounded by |sanity_bound|.
-  static size_t SampleExponential(size_t mean, size_t sanity_bound);
-
-  // Holds an input SpdyString, and manages an offset into that SpdyString.
-  struct NET_EXPORT_PRIVATE Input {
-    Input();  // Initializes |offset| to zero.
-    ~Input();
-
-    size_t remaining() {
-      return input.size() - offset;
-    }
-    const char* ptr() {
-      return input.data() + offset;
-    }
-
-    SpdyString input;
-    size_t offset;
-  };
-
-  // Returns true if the next header block was set at |out|. Returns
-  // false if no input header blocks remain.
-  static bool NextHeaderBlock(Input* input, SpdyStringPiece* out);
-
-  // Returns the serialized header block length prefix for a block of
-  // |block_size| bytes.
-  static SpdyString HeaderBlockPrefix(size_t block_size);
-
-  // A FuzzerContext holds fuzzer input, as well as each of the decoder and
-  // encoder stages which fuzzed header blocks are processed through.
-  struct NET_EXPORT_PRIVATE FuzzerContext {
-    FuzzerContext();
-    ~FuzzerContext();
-    std::unique_ptr<HpackDecoder> first_stage;
-    std::unique_ptr<HpackEncoder> second_stage;
-    std::unique_ptr<HpackDecoder> third_stage;
-  };
-
-  static void InitializeFuzzerContext(FuzzerContext* context);
-
-  // Runs |input_block| through |first_stage| and, iff that succeeds,
-  // |second_stage| and |third_stage| as well. Returns whether all stages
-  // processed the input without error.
-  static bool RunHeaderBlockThroughFuzzerStages(FuzzerContext* context,
-                                                SpdyStringPiece input_block);
-
-  // Flips random bits within |buffer|. The total number of flips is
-  // |flip_per_thousand| bits for every 1,024 bytes of |buffer_length|,
-  // rounding up.
-  static void FlipBits(uint8_t* buffer,
-                       size_t buffer_length,
-                       size_t flip_per_thousand);
-};
-
-}  // namespace net
-
-#endif  // NET_SPDY_FUZZING_HPACK_FUZZ_UTIL_H_