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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 "SkRandom.h"
#include "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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