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// unit-test-byte-encode.cpp
#include "../../source/core/slang-byte-encode-util.h"
#include <stdio.h>
#include <stdlib.h>
#include "tools/unit-test/slang-unit-test.h"
#include "../../source/core/slang-random-generator.h"
#include "../../source/core/slang-list.h"
using namespace Slang;
static void checkUInt32(uint32_t value)
{
uint8_t buffer[ByteEncodeUtil::kMaxLiteEncodeUInt32 + 1];
int writeLen = ByteEncodeUtil::encodeLiteUInt32(value, buffer);
buffer[writeLen] = 0xcd;
uint32_t decode;
int readLen = ByteEncodeUtil::decodeLiteUInt32(buffer, &decode);
SLANG_CHECK(readLen == writeLen && decode == value);
}
SLANG_UNIT_TEST(byteEncode)
{
DefaultRandomGenerator randGen(0x5346536a);
{
SLANG_CHECK(ByteEncodeUtil::calcMsb8(0) == -1);
SLANG_CHECK(ByteEncodeUtil::calcMsb8(1) == 0);
SLANG_CHECK(ByteEncodeUtil::calcMsb8(0x81) == 7);
}
{
SLANG_CHECK(ByteEncodeUtil::calcMsb32(0) == -1);
SLANG_CHECK(ByteEncodeUtil::calcMsb32(0x81) == 7);
SLANG_CHECK(ByteEncodeUtil::calcMsb32(0x00000001) == 0);
SLANG_CHECK(ByteEncodeUtil::calcMsb32(0x00000081) == 7);
SLANG_CHECK(ByteEncodeUtil::calcMsb32(0x00000181) == 8);
SLANG_CHECK(ByteEncodeUtil::calcMsb32(0x00008181) == 15);
SLANG_CHECK(ByteEncodeUtil::calcMsb32(0x00018181) == 16);
SLANG_CHECK(ByteEncodeUtil::calcMsb32(0x00818181) == 23);
SLANG_CHECK(ByteEncodeUtil::calcMsb32(0x01818181) == 24);
SLANG_CHECK(ByteEncodeUtil::calcMsb32(0x81818181) == 31);
SLANG_CHECK(ByteEncodeUtil::calcMsb32(0xffffffff) == 31);
}
{
SLANG_CHECK(ByteEncodeUtil::calcMsByte32(0x00000000) == -1);
SLANG_CHECK(ByteEncodeUtil::calcMsByte32(0x00000001) == 0);
SLANG_CHECK(ByteEncodeUtil::calcMsByte32(0x00000081) == 0);
SLANG_CHECK(ByteEncodeUtil::calcMsByte32(0x00000181) == 1);
SLANG_CHECK(ByteEncodeUtil::calcMsByte32(0x00008181) == 1);
SLANG_CHECK(ByteEncodeUtil::calcMsByte32(0x00018181) == 2);
SLANG_CHECK(ByteEncodeUtil::calcMsByte32(0x00818181) == 2);
SLANG_CHECK(ByteEncodeUtil::calcMsByte32(0x01818181) == 3);
SLANG_CHECK(ByteEncodeUtil::calcMsByte32(0x81818181) == 3);
SLANG_CHECK(ByteEncodeUtil::calcMsByte32(0xffffffff) == 3);
}
{
SLANG_CHECK(ByteEncodeUtil::calcNonZeroMsByte32(0x00000001) == 0);
SLANG_CHECK(ByteEncodeUtil::calcNonZeroMsByte32(0x00000081) == 0);
SLANG_CHECK(ByteEncodeUtil::calcNonZeroMsByte32(0x00000181) == 1);
SLANG_CHECK(ByteEncodeUtil::calcNonZeroMsByte32(0x00008181) == 1);
SLANG_CHECK(ByteEncodeUtil::calcNonZeroMsByte32(0x00018181) == 2);
SLANG_CHECK(ByteEncodeUtil::calcNonZeroMsByte32(0x00818181) == 2);
SLANG_CHECK(ByteEncodeUtil::calcNonZeroMsByte32(0x01818181) == 3);
SLANG_CHECK(ByteEncodeUtil::calcNonZeroMsByte32(0x81818181) == 3);
SLANG_CHECK(ByteEncodeUtil::calcNonZeroMsByte32(0xffffffff) == 3);
}
{
const int blockSize = 1024;
List<uint8_t> encodedBuffer;
encodedBuffer.setCount(ByteEncodeUtil::kMaxLiteEncodeUInt32 * blockSize);
List<uint32_t> initialBuffer;
initialBuffer.setCount(blockSize);
List<uint32_t> decodeBuffer;
decodeBuffer.setCount(blockSize);
// Put in cache?
memset(decodeBuffer.begin(), 0, blockSize * sizeof(uint32_t));
for (int i = 0; i < blockSize; i++)
{
const int v = ByteEncodeUtil::calcMsb8(uint32_t((randGen.nextInt32() & 0xf) | 1));
// Make the commonality of different numbers that bytes are most common, then shorts etc..
uint32_t mask;
switch (v)
{
case 0: mask = 0xffffffff; break;
case 1: mask = 0x00ffffff; break;
case 2: mask = 0x0000ffff; break;
case 3: mask = 0x000000ff; break;
}
initialBuffer[i] = randGen.nextInt32() & mask;
}
size_t numEncodeBytes = ByteEncodeUtil::encodeLiteUInt32(initialBuffer.begin(), blockSize, encodedBuffer.begin());
SLANG_CHECK(ByteEncodeUtil::calcEncodeLiteSizeUInt32(initialBuffer.begin(), blockSize) == numEncodeBytes);
size_t numEncodeBytes2 = ByteEncodeUtil::decodeLiteUInt32(encodedBuffer.begin(), blockSize, decodeBuffer.begin());
SLANG_CHECK(numEncodeBytes2 == numEncodeBytes);
SLANG_CHECK(memcmp(decodeBuffer.begin(), initialBuffer.begin(), sizeof(uint32_t) * blockSize) == 0);
}
{
checkUInt32(uint32_t(0));
checkUInt32(uint32_t(0x7fffff));
checkUInt32(uint32_t(0x7fff));
checkUInt32(uint32_t(0x7f));
checkUInt32(uint32_t(0x7fffffff));
checkUInt32(uint32_t(0xffffffff));
#if 1
for (int64_t i = 0; i < SLANG_INT64(0x100000000); i += 371)
{
checkUInt32(uint32_t(i));
}
#else
for (int64_t i = 0; i < SLANG_INT64(0x100000000); i += 1)
{
checkUInt32(uint32_t(i));
}
#endif
}
}
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