1 /* 2 * Copyright 2011 Google Inc. 3 * 4 * Use of this source code is governed by a BSD-style license that can be 5 * found in the LICENSE file. 6 */ 7 8 #include "SkRandom.h" 9 #include "SkReader32.h" 10 #include "SkWriter32.h" 11 #include "Test.h" 12 13 static void check_contents(skiatest::Reporter* reporter, const SkWriter32& writer, 14 const void* expected, size_t size) { 15 SkAutoSMalloc<256> storage(size); 16 REPORTER_ASSERT(reporter, writer.bytesWritten() == size); 17 writer.flatten(storage.get()); 18 REPORTER_ASSERT(reporter, !memcmp(storage.get(), expected, size)); 19 } 20 21 22 static void test_reserve(skiatest::Reporter* reporter) { 23 // There used to be a bug where we'd assert your first reservation had to 24 // fit in external storage if you used it. This would crash in debug mode. 25 uint8_t storage[4]; 26 SkWriter32 writer(storage, sizeof(storage)); 27 writer.reserve(40); 28 } 29 30 static void test_string_null(skiatest::Reporter* reporter) { 31 uint8_t storage[8]; 32 SkWriter32 writer(storage, sizeof(storage)); 33 34 // Can we write nullptr? 35 writer.writeString(nullptr); 36 const int32_t expected[] = { 0x0, 0x0 }; 37 check_contents(reporter, writer, expected, sizeof(expected)); 38 } 39 40 static void test_rewind(skiatest::Reporter* reporter) { 41 SkSWriter32<32> writer; 42 int32_t array[3] = { 1, 2, 4 }; 43 44 REPORTER_ASSERT(reporter, 0 == writer.bytesWritten()); 45 for (size_t i = 0; i < SK_ARRAY_COUNT(array); ++i) { 46 writer.writeInt(array[i]); 47 } 48 check_contents(reporter, writer, array, sizeof(array)); 49 50 writer.rewindToOffset(2*sizeof(int32_t)); 51 REPORTER_ASSERT(reporter, sizeof(array) - 4 == writer.bytesWritten()); 52 writer.writeInt(3); 53 REPORTER_ASSERT(reporter, sizeof(array) == writer.bytesWritten()); 54 array[2] = 3; 55 check_contents(reporter, writer, array, sizeof(array)); 56 57 // test rewinding past allocated chunks. This used to crash because we 58 // didn't truncate our link-list after freeing trailing blocks 59 { 60 SkWriter32 writer; 61 for (int i = 0; i < 100; ++i) { 62 writer.writeInt(i); 63 } 64 REPORTER_ASSERT(reporter, 100*4 == writer.bytesWritten()); 65 for (int j = 100*4; j >= 0; j -= 16) { 66 writer.rewindToOffset(j); 67 } 68 REPORTER_ASSERT(reporter, writer.bytesWritten() < 16); 69 } 70 } 71 72 static void test_ptr(skiatest::Reporter* reporter) { 73 SkSWriter32<32> writer; 74 75 void* p0 = reporter; 76 void* p1 = &writer; 77 78 // try writing ptrs where at least one of them may be at a non-multiple of 79 // 8 boundary, to confirm this works on 64bit machines. 80 81 writer.writePtr(p0); 82 writer.write8(0x33); 83 writer.writePtr(p1); 84 writer.write8(0x66); 85 86 size_t size = writer.bytesWritten(); 87 REPORTER_ASSERT(reporter, 2 * sizeof(void*) + 2 * sizeof(int32_t)); 88 89 char buffer[32]; 90 SkASSERT(sizeof(buffer) >= size); 91 writer.flatten(buffer); 92 93 SkReader32 reader(buffer, size); 94 REPORTER_ASSERT(reporter, reader.readPtr() == p0); 95 REPORTER_ASSERT(reporter, reader.readInt() == 0x33); 96 REPORTER_ASSERT(reporter, reader.readPtr() == p1); 97 REPORTER_ASSERT(reporter, reader.readInt() == 0x66); 98 } 99 100 static void test1(skiatest::Reporter* reporter, SkWriter32* writer) { 101 const uint32_t data[] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 }; 102 for (size_t i = 0; i < SK_ARRAY_COUNT(data); ++i) { 103 REPORTER_ASSERT(reporter, i*4 == writer->bytesWritten()); 104 writer->write32(data[i]); 105 REPORTER_ASSERT(reporter, data[i] == writer->readTAt<uint32_t>(i * 4)); 106 } 107 108 char buffer[sizeof(data)]; 109 REPORTER_ASSERT(reporter, sizeof(buffer) == writer->bytesWritten()); 110 writer->flatten(buffer); 111 REPORTER_ASSERT(reporter, !memcmp(data, buffer, sizeof(buffer))); 112 } 113 114 static void test2(skiatest::Reporter* reporter, SkWriter32* writer) { 115 static const char gStr[] = "abcdefghimjklmnopqrstuvwxyz"; 116 size_t i; 117 118 size_t len = 0; 119 for (i = 0; i <= 26; ++i) { 120 len += SkWriter32::WriteStringSize(gStr, i); 121 writer->writeString(gStr, i); 122 } 123 REPORTER_ASSERT(reporter, writer->bytesWritten() == len); 124 125 SkAutoMalloc storage(len); 126 writer->flatten(storage.get()); 127 128 SkReader32 reader; 129 reader.setMemory(storage.get(), len); 130 for (i = 0; i <= 26; ++i) { 131 REPORTER_ASSERT(reporter, !reader.eof()); 132 const char* str = reader.readString(&len); 133 REPORTER_ASSERT(reporter, i == len); 134 REPORTER_ASSERT(reporter, strlen(str) == len); 135 REPORTER_ASSERT(reporter, !memcmp(str, gStr, len)); 136 // Ensure that the align4 of the string is padded with zeroes. 137 size_t alignedSize = SkAlign4(len + 1); 138 for (size_t j = len; j < alignedSize; j++) { 139 REPORTER_ASSERT(reporter, 0 == str[j]); 140 } 141 } 142 REPORTER_ASSERT(reporter, reader.eof()); 143 } 144 145 static void testWritePad(skiatest::Reporter* reporter, SkWriter32* writer) { 146 // Create some random data to write. 147 const size_t dataSize = 10; 148 149 SkAutoTMalloc<uint32_t> originalData(dataSize); 150 { 151 SkRandom rand(0); 152 for (size_t i = 0; i < dataSize; i++) { 153 originalData[(int) i] = rand.nextU(); 154 } 155 156 // Write the random data to the writer at different lengths for 157 // different alignments. 158 for (size_t len = 0; len < dataSize; len++) { 159 writer->writePad(originalData.get(), len); 160 } 161 } 162 163 size_t totalBytes = writer->bytesWritten(); 164 165 SkAutoMalloc readStorage(totalBytes); 166 writer->flatten(readStorage.get()); 167 168 SkReader32 reader; 169 reader.setMemory(readStorage.get(), totalBytes); 170 171 for (size_t len = 0; len < dataSize; len++) { 172 const char* readPtr = static_cast<const char*>(reader.skip(len)); 173 // Ensure that the data read is the same as what was written. 174 REPORTER_ASSERT(reporter, memcmp(readPtr, originalData.get(), len) == 0); 175 // Ensure that the rest is padded with zeroes. 176 const char* stop = readPtr + SkAlign4(len); 177 readPtr += len; 178 while (readPtr < stop) { 179 REPORTER_ASSERT(reporter, *readPtr++ == 0); 180 } 181 } 182 } 183 184 static void testOverwriteT(skiatest::Reporter* reporter, SkWriter32* writer) { 185 const size_t padding = 64; 186 187 const uint32_t uint1 = 0x12345678; 188 const uint32_t uint2 = 0x98765432; 189 const SkScalar scalar1 = 1234.5678f; 190 const SkScalar scalar2 = 9876.5432f; 191 const SkRect rect1 = SkRect::MakeXYWH(1, 2, 3, 4); 192 const SkRect rect2 = SkRect::MakeXYWH(5, 6, 7, 8); 193 194 for (size_t i = 0; i < (padding / 4); ++i) { 195 writer->write32(0); 196 } 197 198 writer->write32(uint1); 199 writer->writeRect(rect1); 200 writer->writeScalar(scalar1); 201 202 for (size_t i = 0; i < (padding / 4); ++i) { 203 writer->write32(0); 204 } 205 206 REPORTER_ASSERT(reporter, writer->readTAt<uint32_t>(padding) == uint1); 207 REPORTER_ASSERT(reporter, writer->readTAt<SkRect>(padding + sizeof(uint32_t)) == rect1); 208 REPORTER_ASSERT(reporter, writer->readTAt<SkScalar>( 209 padding + sizeof(uint32_t) + sizeof(SkRect)) == scalar1); 210 211 writer->overwriteTAt(padding, uint2); 212 writer->overwriteTAt(padding + sizeof(uint32_t), rect2); 213 writer->overwriteTAt(padding + sizeof(uint32_t) + sizeof(SkRect), scalar2); 214 215 REPORTER_ASSERT(reporter, writer->readTAt<uint32_t>(padding) == uint2); 216 REPORTER_ASSERT(reporter, writer->readTAt<SkRect>(padding + sizeof(uint32_t)) == rect2); 217 REPORTER_ASSERT(reporter, writer->readTAt<SkScalar>( 218 padding + sizeof(uint32_t) + sizeof(SkRect)) == scalar2); 219 } 220 221 DEF_TEST(Writer32_dynamic, reporter) { 222 SkWriter32 writer; 223 test1(reporter, &writer); 224 225 writer.reset(); 226 test2(reporter, &writer); 227 228 writer.reset(); 229 testWritePad(reporter, &writer); 230 231 writer.reset(); 232 testOverwriteT(reporter, &writer); 233 } 234 235 DEF_TEST(Writer32_contiguous, reporter) { 236 uint32_t storage[256]; 237 SkWriter32 writer; 238 writer.reset(storage, sizeof(storage)); 239 // This write is small enough to fit in storage, so it's contiguous. 240 test1(reporter, &writer); 241 REPORTER_ASSERT(reporter, writer.contiguousArray() != nullptr); 242 243 // Everything other aspect of contiguous/non-contiguous is an 244 // implementation detail, not part of the public contract for 245 // SkWriter32, and so not tested here. 246 } 247 248 DEF_TEST(Writer32_small, reporter) { 249 SkSWriter32<8 * sizeof(intptr_t)> writer; 250 test1(reporter, &writer); 251 writer.reset(); // should just rewind our storage 252 test2(reporter, &writer); 253 254 writer.reset(); 255 testWritePad(reporter, &writer); 256 257 writer.reset(); 258 testOverwriteT(reporter, &writer); 259 } 260 261 DEF_TEST(Writer32_large, reporter) { 262 SkSWriter32<1024 * sizeof(intptr_t)> writer; 263 test1(reporter, &writer); 264 writer.reset(); // should just rewind our storage 265 test2(reporter, &writer); 266 267 writer.reset(); 268 testWritePad(reporter, &writer); 269 270 writer.reset(); 271 testOverwriteT(reporter, &writer); 272 } 273 274 DEF_TEST(Writer32_misc, reporter) { 275 test_reserve(reporter); 276 test_string_null(reporter); 277 test_ptr(reporter); 278 test_rewind(reporter); 279 } 280 281
