1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
|
/*
* Copyright (C) 2010 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.
*/
#define LOG_TAG "Unicode_test"
#include <sys/mman.h>
#include <unistd.h>
#include <log/log.h>
#include <utils/Unicode.h>
#include <gtest/gtest.h>
namespace android {
class UnicodeTest : public testing::Test {
protected:
virtual void SetUp() {
}
virtual void TearDown() {
}
char16_t const * const kSearchString = u"I am a leaf on the wind.";
};
TEST_F(UnicodeTest, UTF8toUTF16ZeroLength) {
ssize_t measured;
const uint8_t str[] = { };
measured = utf8_to_utf16_length(str, 0);
EXPECT_EQ(0, measured)
<< "Zero length input should return zero length output.";
}
TEST_F(UnicodeTest, UTF8toUTF16ASCIILength) {
ssize_t measured;
// U+0030 or ASCII '0'
const uint8_t str[] = { 0x30 };
measured = utf8_to_utf16_length(str, sizeof(str));
EXPECT_EQ(1, measured)
<< "ASCII glyphs should have a length of 1 char16_t";
}
TEST_F(UnicodeTest, UTF8toUTF16Plane1Length) {
ssize_t measured;
// U+2323 SMILE
const uint8_t str[] = { 0xE2, 0x8C, 0xA3 };
measured = utf8_to_utf16_length(str, sizeof(str));
EXPECT_EQ(1, measured)
<< "Plane 1 glyphs should have a length of 1 char16_t";
}
TEST_F(UnicodeTest, UTF8toUTF16SurrogateLength) {
ssize_t measured;
// U+10000
const uint8_t str[] = { 0xF0, 0x90, 0x80, 0x80 };
measured = utf8_to_utf16_length(str, sizeof(str));
EXPECT_EQ(2, measured)
<< "Surrogate pairs should have a length of 2 char16_t";
}
TEST_F(UnicodeTest, UTF8toUTF16TruncatedUTF8) {
ssize_t measured;
// Truncated U+2323 SMILE
// U+2323 SMILE
const uint8_t str[] = { 0xE2, 0x8C };
measured = utf8_to_utf16_length(str, sizeof(str));
EXPECT_EQ(-1, measured)
<< "Truncated UTF-8 should return -1 to indicate invalid";
}
TEST_F(UnicodeTest, UTF8toUTF16Normal) {
const uint8_t str[] = {
0x30, // U+0030, 1 UTF-16 character
0xC4, 0x80, // U+0100, 1 UTF-16 character
0xE2, 0x8C, 0xA3, // U+2323, 1 UTF-16 character
0xF0, 0x90, 0x80, 0x80, // U+10000, 2 UTF-16 character
};
char16_t output[1 + 1 + 1 + 2 + 1]; // Room for NULL
utf8_to_utf16(str, sizeof(str), output, sizeof(output) / sizeof(output[0]));
EXPECT_EQ(0x0030, output[0])
<< "should be U+0030";
EXPECT_EQ(0x0100, output[1])
<< "should be U+0100";
EXPECT_EQ(0x2323, output[2])
<< "should be U+2323";
EXPECT_EQ(0xD800, output[3])
<< "should be first half of surrogate U+10000";
EXPECT_EQ(0xDC00, output[4])
<< "should be second half of surrogate U+10000";
EXPECT_EQ(NULL, output[5])
<< "should be NULL terminated";
}
TEST_F(UnicodeTest, strstr16EmptyTarget) {
EXPECT_EQ(strstr16(kSearchString, u""), kSearchString)
<< "should return the original pointer";
}
TEST_F(UnicodeTest, strstr16EmptyTarget_bug) {
// In the original code when target is an empty string strlen16() would
// start reading the memory until a "terminating null" (that is, zero)
// character is found. This happens because "*target++" in the original
// code would increment the pointer beyond the actual string.
void* memptr;
const size_t alignment = sysconf(_SC_PAGESIZE);
const size_t size = 2 * alignment;
ASSERT_EQ(posix_memalign(&memptr, alignment, size), 0);
// Fill allocated memory.
memset(memptr, 'A', size);
// Create a pointer to an "empty" string on the first page.
char16_t* const emptyString = (char16_t* const)((char*)memptr + alignment - 4);
*emptyString = (char16_t)0;
// Protect the second page to show that strstr16() violates that.
ASSERT_EQ(mprotect((char*)memptr + alignment, alignment, PROT_NONE), 0);
// Test strstr16(): when bug is present a segmentation fault is raised.
ASSERT_EQ(strstr16((char16_t*)memptr, emptyString), (char16_t*)memptr)
<< "should not read beyond the first char16_t.";
// Reset protection of the second page
ASSERT_EQ(mprotect((char*)memptr + alignment, alignment, PROT_READ | PROT_WRITE), 0);
// Free allocated memory.
free(memptr);
}
TEST_F(UnicodeTest, strstr16SameString) {
const char16_t* result = strstr16(kSearchString, kSearchString);
EXPECT_EQ(kSearchString, result)
<< "should return the original pointer";
}
TEST_F(UnicodeTest, strstr16TargetStartOfString) {
const char16_t* result = strstr16(kSearchString, u"I am");
EXPECT_EQ(kSearchString, result)
<< "should return the original pointer";
}
TEST_F(UnicodeTest, strstr16TargetEndOfString) {
const char16_t* result = strstr16(kSearchString, u"wind.");
EXPECT_EQ(kSearchString+19, result);
}
TEST_F(UnicodeTest, strstr16TargetWithinString) {
const char16_t* result = strstr16(kSearchString, u"leaf");
EXPECT_EQ(kSearchString+7, result);
}
TEST_F(UnicodeTest, strstr16TargetNotPresent) {
const char16_t* result = strstr16(kSearchString, u"soar");
EXPECT_EQ(nullptr, result);
}
// http://b/29267949
// Test that overreading in utf8_to_utf16_length is detected
TEST_F(UnicodeTest, InvalidUtf8OverreadDetected) {
// An utf8 char starting with \xc4 is two bytes long.
// Add extra zeros so no extra memory is read in case the code doesn't
// work as expected.
static char utf8[] = "\xc4\x00\x00\x00";
ASSERT_DEATH(utf8_to_utf16_length((uint8_t *) utf8, strlen(utf8),
true /* overreadIsFatal */), "" /* regex for ASSERT_DEATH */);
}
}
|
