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/*
* Copyright (C) 2015 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "utf.h"
#include "common_runtime_test.h"
#include "utf-inl.h"
#include <vector>
namespace art {
class UtfTest : public CommonRuntimeTest {};
TEST_F(UtfTest, GetLeadingUtf16Char) {
EXPECT_EQ(0xffff, GetLeadingUtf16Char(0xeeeeffff));
}
TEST_F(UtfTest, GetTrailingUtf16Char) {
EXPECT_EQ(0xffff, GetTrailingUtf16Char(0xffffeeee));
EXPECT_EQ(0, GetTrailingUtf16Char(0x0000aaaa));
}
#define EXPECT_ARRAY_POSITION(expected, end, start) \
EXPECT_EQ(static_cast<uintptr_t>(expected), \
reinterpret_cast<uintptr_t>(end) - reinterpret_cast<uintptr_t>(start));
// A test string containing one, two, three and four byte UTF-8 sequences.
static const uint8_t kAllSequences[] = {
0x24,
0xc2, 0xa2,
0xe2, 0x82, 0xac,
0xf0, 0x9f, 0x8f, 0xa0,
0x00
};
// A test string that contains a UTF-8 encoding of a surrogate pair
// (code point = U+10400)
static const uint8_t kSurrogateEncoding[] = {
0xed, 0xa0, 0x81,
0xed, 0xb0, 0x80,
0x00
};
TEST_F(UtfTest, GetUtf16FromUtf8) {
const char* const start = reinterpret_cast<const char*>(kAllSequences);
const char* ptr = start;
uint32_t pair = 0;
// Single byte sequence.
pair = GetUtf16FromUtf8(&ptr);
EXPECT_EQ(0x24, GetLeadingUtf16Char(pair));
EXPECT_EQ(0, GetTrailingUtf16Char(pair));
EXPECT_ARRAY_POSITION(1, ptr, start);
// Two byte sequence
pair = GetUtf16FromUtf8(&ptr);
EXPECT_EQ(0xa2, GetLeadingUtf16Char(pair));
EXPECT_EQ(0, GetTrailingUtf16Char(pair));
EXPECT_ARRAY_POSITION(3, ptr, start);
// Three byte sequence
pair = GetUtf16FromUtf8(&ptr);
EXPECT_EQ(0x20ac, GetLeadingUtf16Char(pair));
EXPECT_EQ(0, GetTrailingUtf16Char(pair));
EXPECT_ARRAY_POSITION(6, ptr, start);
// Four byte sequence
pair = GetUtf16FromUtf8(&ptr);
EXPECT_EQ(0xd83c, GetLeadingUtf16Char(pair));
EXPECT_EQ(0xdfe0, GetTrailingUtf16Char(pair));
EXPECT_ARRAY_POSITION(10, ptr, start);
// Null terminator
pair = GetUtf16FromUtf8(&ptr);
EXPECT_EQ(0, GetLeadingUtf16Char(pair));
EXPECT_EQ(0, GetTrailingUtf16Char(pair));
EXPECT_ARRAY_POSITION(11, ptr, start);
}
TEST_F(UtfTest, GetUtf16FromUtf8_SurrogatesPassThrough) {
const char* const start = reinterpret_cast<const char *>(kSurrogateEncoding);
const char* ptr = start;
uint32_t pair = 0;
pair = GetUtf16FromUtf8(&ptr);
EXPECT_EQ(0xd801, GetLeadingUtf16Char(pair));
EXPECT_EQ(0, GetTrailingUtf16Char(pair));
EXPECT_ARRAY_POSITION(3, ptr, start);
pair = GetUtf16FromUtf8(&ptr);
EXPECT_EQ(0xdc00, GetLeadingUtf16Char(pair));
EXPECT_EQ(0, GetTrailingUtf16Char(pair));
EXPECT_ARRAY_POSITION(6, ptr, start);
}
TEST_F(UtfTest, CountModifiedUtf8Chars) {
EXPECT_EQ(5u, CountModifiedUtf8Chars(reinterpret_cast<const char *>(kAllSequences)));
EXPECT_EQ(2u, CountModifiedUtf8Chars(reinterpret_cast<const char *>(kSurrogateEncoding)));
}
static void AssertConversion(const std::vector<uint16_t> input,
const std::vector<uint8_t> expected) {
ASSERT_EQ(expected.size(), CountUtf8Bytes(&input[0], input.size()));
std::vector<uint8_t> output(expected.size());
ConvertUtf16ToModifiedUtf8(reinterpret_cast<char*>(&output[0]), &input[0], input.size());
EXPECT_EQ(expected, output);
}
TEST_F(UtfTest, CountAndConvertUtf8Bytes) {
// Surrogate pairs will be converted into 4 byte sequences.
AssertConversion({ 0xd801, 0xdc00 }, { 0xf0, 0x90, 0x90, 0x80 });
// Three byte encodings that are below & above the leading surrogate
// range respectively.
AssertConversion({ 0xdef0 }, { 0xed, 0xbb, 0xb0 });
AssertConversion({ 0xdcff }, { 0xed, 0xb3, 0xbf });
// Two byte encoding.
AssertConversion({ 0x0101 }, { 0xc4, 0x81 });
// Two byte special case : 0 must use an overlong encoding.
AssertConversion({ 0x0101, 0x0000 }, { 0xc4, 0x81, 0xc0, 0x80 });
// One byte encoding.
AssertConversion({ 'h', 'e', 'l', 'l', 'o' }, { 0x68, 0x65, 0x6c, 0x6c, 0x6f });
AssertConversion({
0xd802, 0xdc02, // Surrogate pair
0xdef0, 0xdcff, // Three byte encodings
0x0101, 0x0000, // Two byte encodings
'p' , 'p' // One byte encoding
}, {
0xf0, 0x90, 0xa0, 0x82,
0xed, 0xbb, 0xb0, 0xed, 0xb3, 0xbf,
0xc4, 0x81, 0xc0, 0x80,
0x70, 0x70
});
}
TEST_F(UtfTest, CountAndConvertUtf8Bytes_UnpairedSurrogate) {
// Unpaired trailing surrogate at the end of input.
AssertConversion({ 'h', 'e', 0xd801 }, { 'h', 'e', 0xed, 0xa0, 0x81 });
// Unpaired (or incorrectly paired) surrogates in the middle of the input.
AssertConversion({ 'h', 0xd801, 'e' }, { 'h', 0xed, 0xa0, 0x81, 'e' });
AssertConversion({ 'h', 0xd801, 0xd801, 'e' }, { 'h', 0xed, 0xa0, 0x81, 0xed, 0xa0, 0x81, 'e' });
AssertConversion({ 'h', 0xdc00, 0xdc00, 'e' }, { 'h', 0xed, 0xb0, 0x80, 0xed, 0xb0, 0x80, 'e' });
}
} // namespace art
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