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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "mozilla/Maybe.h" // mozilla::Maybe
#include "mozilla/Utf8.h" // mozilla::IsTrailingUnit, mozilla::Utf8Unit, mozilla::DecodeOneUtf8CodePoint
#include <inttypes.h> // UINT8_MAX
#include <stdint.h> // uint16_t
#include "js/Exception.h" // JS_IsExceptionPending, JS_ClearPendingException
#include "js/RootingAPI.h" // JS::Rooted, JS::MutableHandle
#include "jsapi-tests/tests.h" // BEGIN_TEST, END_TEST, CHECK
#include "vm/JSAtom.h" // js::AtomizeChars, js::AtomizeUTF8Chars
#include "vm/StringType.h" // JSAtom
using mozilla::DecodeOneUtf8CodePoint;
using mozilla::IsAscii;
using mozilla::IsTrailingUnit;
using mozilla::Maybe;
using mozilla::Utf8Unit;
using JS::Latin1Char;
using JS::MutableHandle;
using JS::Rooted;
BEGIN_TEST(testAtomizeTwoByteUTF8) {
Rooted<JSAtom*> atom16(cx);
Rooted<JSAtom*> atom8(cx);
for (uint16_t i = 0; i <= UINT8_MAX; i++) {
// Test cases where the first unit is ASCII.
if (IsAscii(char16_t(i))) {
for (uint16_t j = 0; j <= UINT8_MAX; j++) {
if (IsAscii(char16_t(j))) {
// If both units are ASCII, the sequence encodes a two-code point
// string.
if (!shouldBeTwoCodePoints(i, j, &atom16, &atom8)) {
return false;
}
} else {
// ASCII followed by non-ASCII should be invalid.
if (!shouldBeInvalid(i, j)) {
return false;
}
}
}
continue;
}
// Test remaining cases where the first unit isn't a two-byte lead.
if ((i & 0b1110'0000) != 0b1100'0000) {
for (uint16_t j = 0; j <= UINT8_MAX; j++) {
// If the first unit isn't a two-byte lead, the sequence is invalid no
// matter what the second unit is.
if (!shouldBeInvalid(i, j)) {
return false;
}
}
continue;
}
// Test remaining cases where the first unit is the two-byte lead of a
// non-Latin-1 code point.
if (i >= 0b1100'0100) {
for (uint16_t j = 0; j <= UINT8_MAX; j++) {
if (IsTrailingUnit(Utf8Unit(static_cast<uint8_t>(j)))) {
if (!shouldBeSingleNonLatin1(i, j, &atom16, &atom8)) {
return false;
}
} else {
if (!shouldBeInvalid(i, j)) {
return false;
}
}
}
continue;
}
// Test remaining cases where the first unit is the two-byte lead of an
// overlong ASCII code point.
if (i < 0b1100'0010) {
for (uint16_t j = 0; j <= UINT8_MAX; j++) {
if (!shouldBeInvalid(i, j)) {
return false;
}
}
continue;
}
// Finally, test remaining cases where the first unit is the two-byte lead
// of a Latin-1 code point.
for (uint16_t j = 0; j <= UINT8_MAX; j++) {
if (IsTrailingUnit(Utf8Unit(static_cast<uint8_t>(j)))) {
if (!shouldBeSingleLatin1(i, j, &atom16, &atom8)) {
return false;
}
} else {
if (!shouldBeInvalid(i, j)) {
return false;
}
}
}
}
return true;
}
bool shouldBeTwoCodePoints(uint16_t first, uint16_t second,
MutableHandle<JSAtom*> atom16,
MutableHandle<JSAtom*> atom8) {
CHECK(first <= UINT8_MAX);
CHECK(second <= UINT8_MAX);
CHECK(IsAscii(char16_t(first)));
CHECK(IsAscii(char16_t(second)));
const char16_t utf16[] = {static_cast<char16_t>(first),
static_cast<char16_t>(second)};
atom16.set(js::AtomizeChars(cx, utf16, 2));
CHECK(atom16);
CHECK(atom16->length() == 2);
CHECK(atom16->latin1OrTwoByteChar(0) == first);
CHECK(atom16->latin1OrTwoByteChar(1) == second);
const char utf8[] = {static_cast<char>(first), static_cast<char>(second)};
atom8.set(js::AtomizeUTF8Chars(cx, utf8, 2));
CHECK(atom8);
CHECK(atom8->length() == 2);
CHECK(atom8->latin1OrTwoByteChar(0) == first);
CHECK(atom8->latin1OrTwoByteChar(1) == second);
CHECK(atom16 == atom8);
return true;
}
bool shouldBeOneCodePoint(uint16_t first, uint16_t second, char32_t v,
MutableHandle<JSAtom*> atom16,
MutableHandle<JSAtom*> atom8) {
CHECK(first <= UINT8_MAX);
CHECK(second <= UINT8_MAX);
CHECK(v <= UINT16_MAX);
const char16_t utf16[] = {static_cast<char16_t>(v)};
atom16.set(js::AtomizeChars(cx, utf16, 1));
CHECK(atom16);
CHECK(atom16->length() == 1);
CHECK(atom16->latin1OrTwoByteChar(0) == v);
const char utf8[] = {static_cast<char>(first), static_cast<char>(second)};
atom8.set(js::AtomizeUTF8Chars(cx, utf8, 2));
CHECK(atom8);
CHECK(atom8->length() == 1);
CHECK(atom8->latin1OrTwoByteChar(0) == v);
CHECK(atom16 == atom8);
return true;
}
bool shouldBeSingleNonLatin1(uint16_t first, uint16_t second,
MutableHandle<JSAtom*> atom16,
MutableHandle<JSAtom*> atom8) {
CHECK(first <= UINT8_MAX);
CHECK(second <= UINT8_MAX);
const char bytes[] = {static_cast<char>(first), static_cast<char>(second)};
const char* iter = &bytes[1];
Maybe<char32_t> cp =
DecodeOneUtf8CodePoint(Utf8Unit(bytes[0]), &iter, bytes + 2);
CHECK(cp.isSome());
char32_t v = cp.value();
CHECK(v > UINT8_MAX);
return shouldBeOneCodePoint(first, second, v, atom16, atom8);
}
bool shouldBeSingleLatin1(uint16_t first, uint16_t second,
MutableHandle<JSAtom*> atom16,
MutableHandle<JSAtom*> atom8) {
CHECK(first <= UINT8_MAX);
CHECK(second <= UINT8_MAX);
const char bytes[] = {static_cast<char>(first), static_cast<char>(second)};
const char* iter = &bytes[1];
Maybe<char32_t> cp =
DecodeOneUtf8CodePoint(Utf8Unit(bytes[0]), &iter, bytes + 2);
CHECK(cp.isSome());
char32_t v = cp.value();
CHECK(v <= UINT8_MAX);
return shouldBeOneCodePoint(first, second, v, atom16, atom8);
}
bool shouldBeInvalid(uint16_t first, uint16_t second) {
CHECK(first <= UINT8_MAX);
CHECK(second <= UINT8_MAX);
const char invalid[] = {static_cast<char>(first), static_cast<char>(second)};
CHECK(!js::AtomizeUTF8Chars(cx, invalid, 2));
CHECK(JS_IsExceptionPending(cx));
JS_ClearPendingException(cx);
return true;
}
END_TEST(testAtomizeTwoByteUTF8)
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