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// slang-slice-allocator.cpp
#include "slang-slice-allocator.h"
#include "../core/slang-blob.h"
namespace Slang {
/* !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! SliceUtil !!!!!!!!!!!!!!!!!!!!!!!!!!! */
/* static */ List<String> SliceUtil::toList(const Slice<TerminatedCharSlice>& in)
{
List<String> list;
const auto count = in.count;
list.setCount(count);
for (Index i = 0; i < count; ++i)
{
list[i] = asStringSlice(in[i]);
}
return list;
}
/* static */const char* SliceUtil::getTerminated(ISlangBlob* blob, TerminatedCharSlice& outSlice)
{
const auto size = blob->getBufferSize();
if (size == 0)
{
outSlice = TerminatedCharSlice();
return outSlice.begin();
}
// If there is a 0 at the end byte, we are zero terminated
const char* chars = (const char*)blob->getBufferPointer();
if (chars[size - 1] == 0)
{
outSlice = TerminatedCharSlice(chars, Count(size - 1));
return chars;
}
// See if it has a castable interface
ComPtr<ICastable> castable;
if (SLANG_SUCCEEDED(blob->queryInterface(ICastable::getTypeGuid(), (void**)castable.writeRef())))
{
if (castable->castAs(SlangTerminatedChars::getTypeGuid()))
{
outSlice = TerminatedCharSlice(chars, Count(size));
return chars;
}
}
return nullptr;
}
/* static */TerminatedCharSlice SliceUtil::toTerminatedCharSlice(SliceAllocator& allocator, ISlangBlob* blob)
{
TerminatedCharSlice slice;
if (SliceUtil::getTerminated(blob, slice))
{
return slice;
}
const auto size = blob->getBufferSize();
// We are out of options, we just have to allocate with zero termination which allocateString does
auto dst = allocator.getArena().allocateString((const char*)blob->getBufferPointer(), Count(size));
return TerminatedCharSlice(dst, Count(size));
}
/* static */TerminatedCharSlice SliceUtil::toTerminatedCharSlice(StringBuilder& storage, ISlangBlob* blob)
{
TerminatedCharSlice slice;
if (SliceUtil::getTerminated(blob, slice))
{
return slice;
}
const auto size = blob->getBufferSize();
auto chars = (const char*)blob->getBufferPointer();
storage.Clear();
storage.append(UnownedStringSlice(chars, size));
return TerminatedCharSlice(storage.getBuffer(), Count(size));
}
/* !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! SliceAllocator !!!!!!!!!!!!!!!!!!!!!!!!!!! */
TerminatedCharSlice SliceAllocator::allocate(const char* in)
{
const size_t length = ::strlen(in);
auto dst = m_arena.allocateString(in, length);
return TerminatedCharSlice(dst, length);
}
TerminatedCharSlice SliceAllocator::allocate(const UnownedStringSlice& slice)
{
const auto length = slice.getLength();
auto dst = m_arena.allocateString(slice.begin(), length);
return TerminatedCharSlice(dst, length);
}
TerminatedCharSlice SliceAllocator::allocate(const Slice<char>& slice)
{
const auto count = slice.count;
auto dst = m_arena.allocateString(slice.begin(), count);
return TerminatedCharSlice(dst, count);
}
Slice<TerminatedCharSlice> SliceAllocator::allocate(const List<String>& in)
{
const auto count = in.getCount();
if (count == 0)
{
return Slice<TerminatedCharSlice>(nullptr, 0);
}
auto dst = m_arena.allocateArray<TerminatedCharSlice>(count);
for (Index i = 0; i < count; ++i)
{
dst[i] = allocate(in[i]);
}
return Slice<TerminatedCharSlice>(dst, count);
}
} // namespace Slang
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