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/*
* Copyright 2016 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef Fuzz_DEFINED
#define Fuzz_DEFINED
#include "SkData.h"
#include "SkTRegistry.h"
#include "SkTypes.h"
class Fuzz : SkNoncopyable {
public:
explicit Fuzz(SkData*);
// Returns the total number of "random" bytes available.
size_t size();
// Returns the total number of "random" bytes remaining for randomness.
size_t remaining();
template <typename T>
bool next(T* n);
bool nextBool();
uint8_t nextB();
uint32_t nextU();
// This can be nan, +- infinity, 0, anything.
float nextF();
// Returns a float between [0..1) as a IEEE float
float nextF1();
// Return the next fuzzed value [min, max) as an unsigned 32bit integer.
uint32_t nextRangeU(uint32_t min, uint32_t max);
/**
* Returns next fuzzed value [min...max) as a float.
* Will not be Infinity or NaN.
*/
float nextRangeF(float min, float max);
void signalBug (); // Tell afl-fuzz these inputs found a bug.
void signalBoring(); // Tell afl-fuzz these inputs are not worth testing.
private:
template <typename T>
T nextT();
SkAutoTUnref<SkData> fBytes;
int fNextByte;
};
template <typename T>
bool Fuzz::next(T* n) {
if (fNextByte + sizeof(T) > fBytes->size()) {
return false;
}
memcpy(n, fBytes->bytes() + fNextByte, sizeof(T));
fNextByte += sizeof(T);
return true;
}
struct Fuzzable {
const char* name;
void (*fn)(Fuzz*);
};
#define DEF_FUZZ(name, f) \
static void fuzz_##name(Fuzz*); \
SkTRegistry<Fuzzable> register_##name({#name, fuzz_##name}); \
static void fuzz_##name(Fuzz* f)
#endif//Fuzz_DEFINED
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