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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 "include/utils/SkRandom.h"
- #include "tools/random_parse_path.h"
- 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 },
- };
- bool gEasy = false; // set to true while debugging to suppress unusual whitespace
- // mostly do nothing, then bias towards spaces
- const char gWhiteSpace[] = { 0, 0, 0, 0, 0, 0, 0, 0, ' ', ' ', ' ', ' ', 0x09, 0x0D, 0x0A };
- static void add_white(SkRandom* rand, SkString* atom) {
- if (gEasy) {
- atom->append(" ");
- return;
- }
- int reps = rand->nextRangeU(0, 2);
- for (int rep = 0; rep < reps; ++rep) {
- int index = rand->nextRangeU(0, (int) SK_ARRAY_COUNT(gWhiteSpace) - 1);
- if (gWhiteSpace[index]) {
- atom->append(&gWhiteSpace[index], 1);
- }
- }
- }
- static void add_comma(SkRandom* rand, SkString* atom) {
- if (gEasy) {
- atom->append(",");
- return;
- }
- size_t count = atom->size();
- add_white(rand, atom);
- if (rand->nextBool()) {
- atom->append(",");
- }
- do {
- add_white(rand, atom);
- } while (count == atom->size());
- }
- static void add_some_white(SkRandom* rand, SkString* atom) {
- size_t count = atom->size();
- do {
- add_white(rand, atom);
- } while (count == atom->size());
- }
- SkString MakeRandomParsePathPiece(SkRandom* rand) {
- SkString atom;
- int index = rand->nextRangeU(0, (int) SK_ARRAY_COUNT(gLegal) - 1);
- const Legal& legal = gLegal[index];
- gEasy ? atom.append("\n") : add_white(rand, &atom);
- char symbol = legal.fSymbol | (rand->nextBool() ? 0x20 : 0);
- atom.append(&symbol, 1);
- int reps = rand->nextRangeU(1, 3);
- for (int rep = 0; rep < reps; ++rep) {
- for (int index = 0; index < legal.fScalars; ++index) {
- SkScalar coord = rand->nextRangeF(0, 100);
- add_white(rand, &atom);
- atom.appendScalar(coord);
- if (rep < reps - 1 && index < legal.fScalars - 1) {
- add_comma(rand, &atom);
- } else {
- add_some_white(rand, &atom);
- }
- if ('A' == legal.fSymbol && 1 == index) {
- atom.appendScalar(rand->nextRangeF(-720, 720));
- add_comma(rand, &atom);
- atom.appendU32(rand->nextRangeU(0, 1));
- add_comma(rand, &atom);
- atom.appendU32(rand->nextRangeU(0, 1));
- add_comma(rand, &atom);
- }
- }
- }
- return atom;
- }
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