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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.
- */
- #include "fuzz/Fuzz.h"
- #include "include/core/SkString.h"
- #include "include/utils/SkParsePath.h"
- #include <stdlib.h>
- // Most of this is taken from random_parse_path.cpp and adapted to use the Fuzz
- // instead of SKRandom
- static const struct Legal {
- char fSymbol;
- int fScalars;
- } gLegal[] = {
- { 'M', 2 },
- { 'H', 1 },
- { 'V', 1 },
- { 'L', 2 },
- { 'Q', 4 },
- { 'T', 2 },
- { 'C', 6 },
- { 'S', 4 },
- { 'A', 4 },
- { 'Z', 0 },
- };
- static bool gEasy = false; // set to true while debugging to suppress unusual whitespace
- // mostly do nothing, then bias towards spaces
- static const char gWhiteSpace[] = { 0, 0, 0, 0, 0, 0, 0, 0, ' ', ' ', ' ', ' ', 0x09, 0x0D, 0x0A };
- static void add_white(Fuzz* fuzz, SkString* atom) {
- if (gEasy) {
- atom->append(" ");
- return;
- }
- // Use a uint8_t to conserve bytes. This makes our "fuzzed bytes footprint"
- // smaller, which leads to more efficient fuzzing.
- uint8_t reps;
- fuzz->nextRange(&reps, 0, 2);
- for (uint8_t rep = 0; rep < reps; ++rep) {
- uint8_t index;
- fuzz->nextRange(&index, 0, (int) SK_ARRAY_COUNT(gWhiteSpace) - 1);
- if (gWhiteSpace[index]) {
- atom->append(&gWhiteSpace[index], 1);
- }
- }
- }
- static void add_some_white(Fuzz* fuzz, SkString* atom) {
- for(int i = 0; i < 10; i++) {
- add_white(fuzz, atom);
- }
- }
- static void add_comma(Fuzz* fuzz, SkString* atom) {
- if (gEasy) {
- atom->append(",");
- return;
- }
- add_white(fuzz, atom);
- bool b;
- fuzz->next(&b);
- if (b) {
- atom->append(",");
- }
- add_some_white(fuzz, atom);
- }
- SkString MakeRandomParsePathPiece(Fuzz* fuzz) {
- SkString atom;
- uint8_t index;
- fuzz->nextRange(&index, 0, (int) SK_ARRAY_COUNT(gLegal) - 1);
- const Legal& legal = gLegal[index];
- gEasy ? atom.append("\n") : add_white(fuzz, &atom);
- bool b;
- fuzz->next(&b);
- char symbol = legal.fSymbol | (b ? 0x20 : 0);
- atom.append(&symbol, 1);
- uint8_t reps;
- fuzz->nextRange(&reps, 1, 3);
- for (int rep = 0; rep < reps; ++rep) {
- for (int index = 0; index < legal.fScalars; ++index) {
- SkScalar coord;
- fuzz->nextRange(&coord, 0.0f, 100.0f);
- add_white(fuzz, &atom);
- atom.appendScalar(coord);
- if (rep < reps - 1 && index < legal.fScalars - 1) {
- add_comma(fuzz, &atom);
- } else {
- add_some_white(fuzz, &atom);
- }
- if ('A' == legal.fSymbol && 1 == index) {
- SkScalar s;
- fuzz->nextRange(&s, -720.0f, 720.0f);
- atom.appendScalar(s);
- add_comma(fuzz, &atom);
- fuzz->next(&b);
- atom.appendU32(b);
- add_comma(fuzz, &atom);
- fuzz->next(&b);
- atom.appendU32(b);
- add_comma(fuzz, &atom);
- }
- }
- }
- return atom;
- }
- DEF_FUZZ(ParsePath, fuzz) {
- SkPath path;
- SkString spec;
- uint8_t count;
- fuzz->nextRange(&count, 0, 40);
- for (uint8_t i = 0; i < count; ++i) {
- spec.append(MakeRandomParsePathPiece(fuzz));
- }
- SkDebugf("SkParsePath::FromSVGString(%s, &path);\n",spec.c_str());
- if (!SkParsePath::FromSVGString(spec.c_str(), &path)){
- SkDebugf("Could not decode path\n");
- }
- }
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