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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 THIRD_PARTY_BLINK_RENDERER_PLATFORM_TESTING_FUZZED_DATA_PROVIDER_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_TESTING_FUZZED_DATA_PROVIDER_H_
#include "base/test/fuzzed_data_provider.h"
#include "third_party/blink/renderer/platform/wtf/noncopyable.h"
#include "third_party/blink/renderer/platform/wtf/text/cstring.h"
#include "third_party/blink/renderer/platform/wtf/text/wtf_string.h"
namespace blink {
// This class simply wraps //base/test/fuzzed_data_provider and vends Blink
// friendly types.
class FuzzedDataProvider {
WTF_MAKE_NONCOPYABLE(FuzzedDataProvider);
public:
FuzzedDataProvider(const uint8_t* bytes, size_t num_bytes);
// Returns a string with length between 0 and max_length.
String ConsumeRandomLengthString(size_t max_length);
// Returns a String containing all remaining bytes of the input data.
CString ConsumeRemainingBytes();
// Returns a bool, or false when no data remains.
bool ConsumeBool() { return provider_.ConsumeBool(); }
// Returns a number in the range [min, max] by consuming bytes from the input
// data. The value might not be uniformly distributed in the given range. If
// there's no input data left, always returns |min|. |min| must be less than
// or equal to |max|.
template <typename T>
T ConsumeIntegralInRange(T min, T max) {
return provider_.ConsumeIntegralInRange<T>(min, max);
}
// Returns a number in the range [Type's min, Type's max]. The value might
// not be uniformly distributed in the given range. If there's no input data
// left, always returns |min|.
template <typename T>
T ConsumeIntegral() {
return provider_.ConsumeIntegral<T>();
}
// Returns a value from |array|, consuming as many bytes as needed to do so.
// |array| must be a fixed-size array.
template <typename T, size_t size>
T PickValueInArray(T (&array)[size]) {
return array[provider_.ConsumeIntegralInRange<size_t>(0, size - 1)];
}
// Reports the remaining bytes available for fuzzed input.
size_t RemainingBytes() { return provider_.remaining_bytes(); }
private:
base::FuzzedDataProvider provider_;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_PLATFORM_TESTING_FUZZED_DATA_PROVIDER_H_