1 /*
2 * Copyright 2016 Google Inc.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8
9 #include "fuzz/Fuzz.h"
10 #include "fuzz/FuzzCommon.h"
11
12 // UBSAN reminds us that bool can only legally hold 0 or 1.
next(bool * b)13 void Fuzz::next(bool* b) {
14 uint8_t n;
15 this->next(&n);
16 *b = (n & 1) == 1;
17 }
18
next(SkImageFilter::CropRect * cropRect)19 void Fuzz::next(SkImageFilter::CropRect* cropRect) {
20 SkRect rect;
21 uint8_t flags;
22 this->next(&rect);
23 this->nextRange(&flags, 0, 0xF);
24 *cropRect = SkImageFilter::CropRect(rect, flags);
25 }
26
nextBytes(void * n,size_t size)27 void Fuzz::nextBytes(void* n, size_t size) {
28 if ((fNextByte + size) > fBytes->size()) {
29 sk_bzero(n, size);
30 memcpy(n, fBytes->bytes() + fNextByte, fBytes->size() - fNextByte);
31 fNextByte = fBytes->size();
32 return;
33 }
34 memcpy(n, fBytes->bytes() + fNextByte, size);
35 fNextByte += size;
36 }
37
next(SkRegion * region)38 void Fuzz::next(SkRegion* region) {
39 // See FuzzCommon.h
40 FuzzNiceRegion(this, region, 10);
41 }
42
nextRange(float * f,float min,float max)43 void Fuzz::nextRange(float* f, float min, float max) {
44 this->next(f);
45 if (!std::isnormal(*f) && *f != 0.0f) {
46 // Don't deal with infinity or other strange floats.
47 *f = max;
48 }
49 *f = min + std::fmod(std::abs(*f), (max - min + 1));
50 }
51