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// slang-serialize-types.cpp
#include "slang-serialize-types.h"
#include "../core/slang-byte-encode-util.h"
#include "../core/slang-math.h"
#include "../core/slang-text-io.h"
namespace Slang
{
// Needed for linkage with some compilers
/* static */ const SerialStringData::StringIndex SerialStringData::kNullStringIndex;
/* static */ const SerialStringData::StringIndex SerialStringData::kEmptyStringIndex;
namespace
{ // anonymous
struct ByteReader
{
Byte operator()() const { return Byte(*m_pos++); }
ByteReader(const char* pos)
: m_pos(pos)
{
}
mutable const char* m_pos;
};
} // namespace
// !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! SerialStringTableUtil !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
/* static */ void SerialStringTableUtil::encodeStringTable(
const StringSlicePool& pool,
List<char>& stringTable)
{
// Skip the default handles -> nothing is encoded via them
return encodeStringTable(pool.getAdded(), stringTable);
}
/* static */ void SerialStringTableUtil::encodeStringTable(
const ConstArrayView<UnownedStringSlice>& slices,
List<char>& stringTable)
{
stringTable.clear();
for (const auto& slice : slices)
{
// TODO(JS):
// This is a bit of a hack. We need to store the string length, along with the string
// contents. We don't want to write the size as (say) uint32, because most strings are
// short. So we just save off the length as a utf8 encoding. As it stands this *does* have
// an arguable problem because encoding isn't of the full 32 bits.
const int len = int(slice.getLength());
// We need to write into the the string array
char prefixBytes[6];
const int numPrefixBytes = encodeUnicodePointToUTF8(len, prefixBytes);
const Index baseIndex = stringTable.getCount();
auto newCount = baseIndex + numPrefixBytes + len;
stringTable.growToCount(newCount);
char* dst = stringTable.begin() + baseIndex;
memcpy(dst, prefixBytes, numPrefixBytes);
memcpy(dst + numPrefixBytes, slice.begin(), len);
}
}
/* static */ void SerialStringTableUtil::appendDecodedStringTable(
const char* table,
size_t tableSize,
List<UnownedStringSlice>& slicesOut)
{
const char* start = table;
const char* cur = start;
const char* end = table + tableSize;
while (cur < end)
{
ByteReader reader(cur);
const int len = getUnicodePointFromUTF8(reader);
slicesOut.add(UnownedStringSlice(reader.m_pos, len));
cur = reader.m_pos + len;
}
}
/* static */ void SerialStringTableUtil::decodeStringTable(
const char* table,
size_t tableSize,
List<UnownedStringSlice>& slicesOut)
{
slicesOut.setCount(2);
slicesOut[0] = UnownedStringSlice(nullptr, size_t(0));
slicesOut[1] = UnownedStringSlice("", size_t(0));
appendDecodedStringTable(table, tableSize, slicesOut);
}
/* static */ void SerialStringTableUtil::decodeStringTable(
const char* table,
size_t tableSize,
StringSlicePool& outPool)
{
outPool.clear();
const char* start = table;
const char* cur = start;
const char* end = table + tableSize;
while (cur < end)
{
ByteReader reader(cur);
const int len = getUnicodePointFromUTF8(reader);
outPool.add(UnownedStringSlice(reader.m_pos, len));
cur = reader.m_pos + len;
}
}
/* static */ void SerialStringTableUtil::calcStringSlicePoolMap(
const List<UnownedStringSlice>& slices,
StringSlicePool& pool,
List<StringSlicePool::Handle>& indexMapOut)
{
SLANG_ASSERT(slices.getCount() >= StringSlicePool::kDefaultHandlesCount);
SLANG_ASSERT(
slices[int(StringSlicePool::kNullHandle)] == "" &&
slices[int(StringSlicePool::kNullHandle)].begin() == nullptr);
SLANG_ASSERT(slices[int(StringSlicePool::kEmptyHandle)] == "");
indexMapOut.setCount(slices.getCount());
// Set up all of the defaults
for (int i = 0; i < StringSlicePool::kDefaultHandlesCount; ++i)
{
indexMapOut[i] = StringSlicePool::Handle(i);
}
const Index numSlices = slices.getCount();
for (Index i = StringSlicePool::kDefaultHandlesCount; i < numSlices; ++i)
{
indexMapOut[i] = pool.add(slices[i]);
}
}
// !!!!!!!!!!!!!!!!!!!!!!!!!!!! SerialRiffUtil !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
/* static */ Result SerialRiffUtil::writeArrayChunk(
FourCC chunkId,
const void* data,
size_t numEntries,
size_t typeSize,
RIFF::BuildCursor& cursor)
{
if (numEntries == 0)
{
return SLANG_OK;
}
SLANG_SCOPED_RIFF_BUILDER_DATA_CHUNK(cursor, chunkId);
SerialBinary::ArrayHeader header;
header.numEntries = uint32_t(numEntries);
cursor.addData(&header, sizeof(header));
cursor.addData(data, typeSize * numEntries);
return SLANG_OK;
}
/* static */ Result SerialRiffUtil::readArrayChunk(
RIFF::DataChunk const* dataChunk,
ListResizer& listOut)
{
typedef SerialBinary Bin;
MemoryReader reader(dataChunk->getPayload(), dataChunk->getPayloadSize());
const Size typeSize = listOut.getTypeSize();
Bin::ArrayHeader header;
SLANG_RETURN_ON_FAIL(reader.read(header));
const Size payloadSize = header.numEntries * typeSize;
SLANG_ASSERT(payloadSize == reader.getRemainingSize());
void* dst = listOut.setSize(header.numEntries);
::memcpy(dst, reader.getRemainingData(), payloadSize);
return SLANG_OK;
}
} // namespace Slang
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