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1 /*
2  * Copyright 2011 Google Inc. All Rights Reserved.
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #include <stdio.h>
18 
19 #include "gtest/gtest.h"
20 #include "sfntly/data/memory_byte_array.h"
21 #include "sfntly/data/growable_memory_byte_array.h"
22 
23 namespace sfntly {
24 namespace byte_array_test {
25 
26 const int32_t BYTE_ARRAY_SIZES[] =
27     {1, 7, 127, 128, 129, 255, 256, 257, 666, 1023, 10000, 0xffff, 0x10000};
28 
FillTestByteArray(ByteArray * ba,int32_t size)29 void FillTestByteArray(ByteArray* ba, int32_t size) {
30   for (int32_t i = 0; i < size; ++i) {
31     ba->Put(i, (byte_t)(i % 256));
32   }
33 }
34 
ReadByteArrayWithBuffer(ByteArray * ba,ByteVector * buffer,ByteVector * b)35 void ReadByteArrayWithBuffer(ByteArray* ba, ByteVector* buffer, ByteVector* b) {
36   b->resize(ba->Length());
37   int32_t index = 0;
38   while (index < ba->Length()) {
39     int32_t bytes_read = ba->Get(index, buffer);
40     std::copy(buffer->begin(), buffer->begin() + bytes_read,
41               b->begin() + index);
42     index += bytes_read;
43   }
44 }
45 
ReadByteArrayWithSlidingWindow(ByteArray * ba,int window_size,ByteVector * b)46 void ReadByteArrayWithSlidingWindow(ByteArray* ba, int window_size,
47                                     ByteVector* b) {
48   b->resize(ba->Length());
49   int32_t index = 0;
50   int32_t actual_window_size = window_size;
51   while (index < ba->Length()) {
52     actual_window_size =
53         std::min<int32_t>(actual_window_size, b->size() - index);
54     int32_t bytes_read = ba->Get(index, &((*b)[0]), index, actual_window_size);
55     index += bytes_read;
56   }
57 }
58 
ReadComparison(ByteArray * ba1,ByteArray * ba2)59 bool ReadComparison(ByteArray* ba1, ByteArray* ba2) {
60   // single byte reads
61   for (int i = 0; i < ba1->Length(); ++i) {
62     EXPECT_EQ(ba1->Get(i), ba2->Get(i));
63   }
64 
65   ByteVector b1, b2;
66   // buffer reads
67   int increments = std::max<int32_t>(ba1->Length() / 11, 1);
68   for (int buffer_size = 1; buffer_size < ba1->Length();
69        buffer_size += increments) {
70     ByteVector buffer(buffer_size);
71     ReadByteArrayWithBuffer(ba1, &buffer, &b1);
72     ReadByteArrayWithBuffer(ba2, &buffer, &b2);
73     EXPECT_GT(b1.size(), static_cast<size_t>(0));
74     EXPECT_EQ(b1.size(), b2.size());
75     EXPECT_TRUE(std::equal(b1.begin(), b1.end(), b2.begin()));
76   }
77 
78   // sliding window reads
79   b1.clear();
80   b2.clear();
81   for (int window_size = 1; window_size < ba1->Length();
82        window_size += increments) {
83     ReadByteArrayWithSlidingWindow(ba1, window_size, &b1);
84     ReadByteArrayWithSlidingWindow(ba2, window_size, &b2);
85     EXPECT_GT(b1.size(), static_cast<size_t>(0));
86     EXPECT_EQ(b1.size(), b2.size());
87     EXPECT_TRUE(std::equal(b1.begin(), b1.end(), b2.begin()));
88   }
89 
90   return true;
91 }
92 
CopyTest(ByteArray * ba)93 bool CopyTest(ByteArray* ba) {
94   ByteArrayPtr fixed_copy = new MemoryByteArray(ba->Length());
95   ba->CopyTo(fixed_copy);
96   EXPECT_EQ(ba->Length(), fixed_copy->Length());
97   EXPECT_TRUE(ReadComparison(ba, fixed_copy));
98 
99   ByteArrayPtr growable_copy = new GrowableMemoryByteArray();
100   ba->CopyTo(growable_copy);
101   EXPECT_EQ(ba->Length(), growable_copy->Length());
102   EXPECT_TRUE(ReadComparison(ba, growable_copy));
103 
104   return true;
105 }
106 
ByteArrayTester(ByteArray * ba)107 bool ByteArrayTester(ByteArray* ba) {
108   return CopyTest(ba);
109 }
110 
111 }  // namespace byte_array_test
112 
TestMemoryByteArray()113 bool TestMemoryByteArray() {
114   fprintf(stderr, "fixed mem: size ");
115   for (size_t i = 0;
116        i < sizeof(byte_array_test::BYTE_ARRAY_SIZES) / sizeof(int32_t); ++i) {
117     int32_t size = byte_array_test::BYTE_ARRAY_SIZES[i];
118     fprintf(stderr, "%d ", size);
119     ByteArrayPtr ba = new MemoryByteArray(size);
120     byte_array_test::FillTestByteArray(ba, size);
121     EXPECT_TRUE(byte_array_test::ByteArrayTester(ba));
122   }
123   fprintf(stderr, "\n");
124   return true;
125 }
126 
TestGrowableMemoryByteArray()127 bool TestGrowableMemoryByteArray() {
128   fprintf(stderr, "growable mem: size ");
129   for (size_t i = 0;
130        i < sizeof(byte_array_test::BYTE_ARRAY_SIZES) / sizeof(int32_t); ++i) {
131     int32_t size = byte_array_test::BYTE_ARRAY_SIZES[i];
132     fprintf(stderr, "%d ", size);
133     ByteArrayPtr ba = new GrowableMemoryByteArray();
134     byte_array_test::FillTestByteArray(ba, size);
135     EXPECT_TRUE(byte_array_test::ByteArrayTester(ba));
136   }
137   fprintf(stderr, "\n");
138   return true;
139 }
140 
141 }  // namespace sfntly
142 
TEST(ByteArray,All)143 TEST(ByteArray, All) {
144   ASSERT_TRUE(sfntly::TestMemoryByteArray());
145   ASSERT_TRUE(sfntly::TestGrowableMemoryByteArray());
146 }
147