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
nextBytes(void * n,size_t size)19 void Fuzz::nextBytes(void* n, size_t size) {
20 if ((fNextByte + size) > fBytes->size()) {
21 sk_bzero(n, size);
22 memcpy(n, fBytes->bytes() + fNextByte, fBytes->size() - fNextByte);
23 fNextByte = fBytes->size();
24 return;
25 }
26 memcpy(n, fBytes->bytes() + fNextByte, size);
27 fNextByte += size;
28 }
29
next(SkRegion * region)30 void Fuzz::next(SkRegion* region) {
31 // See FuzzCommon.h
32 FuzzNiceRegion(this, region, 10);
33 }
34
nextRange(float * f,float min,float max)35 void Fuzz::nextRange(float* f, float min, float max) {
36 this->next(f);
37 if (!std::isnormal(*f) && *f != 0.0f) {
38 // Don't deal with infinity or other strange floats.
39 *f = max;
40 }
41 *f = min + std::fmod(std::abs(*f), (max - min + 1));
42 }
43