47fa13640b
BUG=skia:1469, code.google.com/p/android/issues/detail?id=58257 R=scroggo@google.com Author: mtklein@google.com Review URL: https://chromiumcodereview.appspot.com/22359003 git-svn-id: http://skia.googlecode.com/svn/trunk@10662 2bbb7eff-a529-9590-31e7-b0007b416f81
266 lines
8.1 KiB
C++
266 lines
8.1 KiB
C++
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/*
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* Copyright 2011 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "SkRandom.h"
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#include "SkReader32.h"
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#include "SkWriter32.h"
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#include "Test.h"
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static void check_contents(skiatest::Reporter* reporter, const SkWriter32& writer,
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const void* expected, size_t size) {
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SkAutoSMalloc<256> storage(size);
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REPORTER_ASSERT(reporter, writer.bytesWritten() == size);
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writer.flatten(storage.get());
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REPORTER_ASSERT(reporter, !memcmp(storage.get(), expected, size));
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}
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static void test_string_null(skiatest::Reporter* reporter) {
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uint8_t storage[8];
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SkWriter32 writer(0, storage, sizeof(storage));
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SkReader32 reader(storage, sizeof(storage));
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const char* str;
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size_t len;
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// Can we write NULL?
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writer.writeString(NULL);
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const int32_t null[] = { 0xFFFF };
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check_contents(reporter, writer, null, sizeof(null));
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str = reader.readString(&len);
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REPORTER_ASSERT(reporter, NULL == str);
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REPORTER_ASSERT(reporter, 0 == len);
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writer.reset(storage, sizeof(storage));
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reader.rewind();
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// Is NULL distinct from ""?
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writer.writeString("");
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const int32_t empty[] = { 0x0, 0x0 };
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check_contents(reporter, writer, empty, sizeof(empty));
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str = reader.readString(&len);
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REPORTER_ASSERT(reporter, 0 == strcmp("", str));
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REPORTER_ASSERT(reporter, 0 == len);
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}
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static void test_rewind(skiatest::Reporter* reporter) {
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SkSWriter32<32> writer(32);
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int32_t array[3] = { 1, 2, 4 };
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REPORTER_ASSERT(reporter, 0 == writer.bytesWritten());
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for (size_t i = 0; i < SK_ARRAY_COUNT(array); ++i) {
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writer.writeInt(array[i]);
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}
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check_contents(reporter, writer, array, sizeof(array));
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writer.rewindToOffset(2*sizeof(int32_t));
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REPORTER_ASSERT(reporter, sizeof(array) - 4 == writer.bytesWritten());
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writer.writeInt(3);
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REPORTER_ASSERT(reporter, sizeof(array) == writer.bytesWritten());
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array[2] = 3;
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check_contents(reporter, writer, array, sizeof(array));
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// test rewinding past allocated chunks. This used to crash because we
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// didn't truncate our link-list after freeing trailing blocks
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{
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SkWriter32 writer(64);
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for (int i = 0; i < 100; ++i) {
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writer.writeInt(i);
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}
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REPORTER_ASSERT(reporter, 100*4 == writer.bytesWritten());
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for (int j = 100*4; j >= 0; j -= 16) {
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writer.rewindToOffset(j);
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}
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REPORTER_ASSERT(reporter, writer.bytesWritten() < 16);
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}
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}
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static void test_ptr(skiatest::Reporter* reporter) {
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SkSWriter32<32> writer(32);
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void* p0 = reporter;
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void* p1 = &writer;
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// try writing ptrs where at least one of them may be at a non-multiple of
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// 8 boundary, to confirm this works on 64bit machines.
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writer.writePtr(p0);
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writer.write8(0x33);
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writer.writePtr(p1);
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writer.write8(0x66);
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size_t size = writer.size();
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REPORTER_ASSERT(reporter, 2 * sizeof(void*) + 2 * sizeof(int32_t));
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char buffer[32];
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SkASSERT(sizeof(buffer) >= size);
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writer.flatten(buffer);
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SkReader32 reader(buffer, size);
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REPORTER_ASSERT(reporter, reader.readPtr() == p0);
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REPORTER_ASSERT(reporter, reader.readInt() == 0x33);
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REPORTER_ASSERT(reporter, reader.readPtr() == p1);
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REPORTER_ASSERT(reporter, reader.readInt() == 0x66);
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}
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static void test1(skiatest::Reporter* reporter, SkWriter32* writer) {
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const uint32_t data[] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };
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for (size_t i = 0; i < SK_ARRAY_COUNT(data); ++i) {
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REPORTER_ASSERT(reporter, i*4 == writer->size());
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writer->write32(data[i]);
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uint32_t* addr = writer->peek32(i * 4);
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REPORTER_ASSERT(reporter, data[i] == *addr);
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}
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char buffer[sizeof(data)];
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REPORTER_ASSERT(reporter, sizeof(buffer) == writer->size());
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writer->flatten(buffer);
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REPORTER_ASSERT(reporter, !memcmp(data, buffer, sizeof(buffer)));
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}
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static void test2(skiatest::Reporter* reporter, SkWriter32* writer) {
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static const char gStr[] = "abcdefghimjklmnopqrstuvwxyz";
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size_t i;
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size_t len = 0;
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for (i = 0; i <= 26; ++i) {
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len += SkWriter32::WriteStringSize(gStr, i);
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writer->writeString(gStr, i);
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}
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REPORTER_ASSERT(reporter, writer->size() == len);
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SkAutoMalloc storage(len);
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writer->flatten(storage.get());
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SkReader32 reader;
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reader.setMemory(storage.get(), len);
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for (i = 0; i <= 26; ++i) {
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REPORTER_ASSERT(reporter, !reader.eof());
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const char* str = reader.readString(&len);
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REPORTER_ASSERT(reporter, i == len);
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REPORTER_ASSERT(reporter, strlen(str) == len);
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REPORTER_ASSERT(reporter, !memcmp(str, gStr, len));
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// Ensure that the align4 of the string is padded with zeroes.
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size_t alignedSize = SkAlign4(len + 1);
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for (size_t j = len; j < alignedSize; j++) {
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REPORTER_ASSERT(reporter, 0 == str[j]);
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}
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}
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REPORTER_ASSERT(reporter, reader.eof());
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}
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static void testWritePad(skiatest::Reporter* reporter, SkWriter32* writer) {
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// Create some random data to write.
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const size_t dataSize = 10<<2;
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SkASSERT(SkIsAlign4(dataSize));
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SkAutoMalloc originalData(dataSize);
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{
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SkMWCRandom rand(0);
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uint32_t* ptr = static_cast<uint32_t*>(originalData.get());
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uint32_t* stop = ptr + (dataSize>>2);
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while (ptr < stop) {
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*ptr++ = rand.nextU();
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}
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// Write the random data to the writer at different lengths for
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// different alignments.
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for (size_t len = 0; len < dataSize; len++) {
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writer->writePad(originalData.get(), len);
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}
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}
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uint32_t totalBytes = writer->size();
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SkAutoMalloc readStorage(totalBytes);
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writer->flatten(readStorage.get());
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SkReader32 reader;
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reader.setMemory(readStorage.get(), totalBytes);
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for (size_t len = 0; len < dataSize; len++) {
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const char* readPtr = static_cast<const char*>(reader.skip(len));
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// Ensure that the data read is the same as what was written.
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REPORTER_ASSERT(reporter, memcmp(readPtr, originalData.get(), len) == 0);
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// Ensure that the rest is padded with zeroes.
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const char* stop = readPtr + SkAlign4(len);
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readPtr += len;
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while (readPtr < stop) {
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REPORTER_ASSERT(reporter, *readPtr++ == 0);
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}
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}
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}
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static void Tests(skiatest::Reporter* reporter) {
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// dynamic allocator
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{
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SkWriter32 writer(256 * 4);
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test1(reporter, &writer);
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writer.reset();
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test2(reporter, &writer);
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writer.reset();
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testWritePad(reporter, &writer);
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}
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// storage-block
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{
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SkWriter32 writer(0);
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uint32_t storage[256];
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writer.reset(storage, sizeof(storage));
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// These three writes are small enough to fit in storage.
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test1(reporter, &writer);
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REPORTER_ASSERT(reporter, writer.wroteOnlyToStorage());
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writer.reset(storage, sizeof(storage));
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test2(reporter, &writer);
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REPORTER_ASSERT(reporter, writer.wroteOnlyToStorage());
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writer.reset(storage, sizeof(storage));
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testWritePad(reporter, &writer);
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REPORTER_ASSERT(reporter, writer.wroteOnlyToStorage());
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// Try overflowing the storage-block.
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uint32_t smallStorage[8];
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writer.reset(smallStorage, sizeof(smallStorage));
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test2(reporter, &writer);
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REPORTER_ASSERT(reporter, !writer.wroteOnlyToStorage());
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}
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// small storage
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{
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SkSWriter32<8 * sizeof(intptr_t)> writer(100);
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test1(reporter, &writer);
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writer.reset(); // should just rewind our storage
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test2(reporter, &writer);
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writer.reset();
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testWritePad(reporter, &writer);
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}
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// large storage
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{
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SkSWriter32<1024 * sizeof(intptr_t)> writer(100);
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test1(reporter, &writer);
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writer.reset(); // should just rewind our storage
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test2(reporter, &writer);
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writer.reset();
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testWritePad(reporter, &writer);
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}
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test_string_null(reporter);
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test_ptr(reporter);
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test_rewind(reporter);
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}
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#include "TestClassDef.h"
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DEFINE_TESTCLASS("Writer32", Writer32Class, Tests)
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