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// slang-slice-allocator.h
#ifndef SLANG_SLICE_ALLOCATOR_H
#define SLANG_SLICE_ALLOCATOR_H
// Has definition of CharSlice
#include "../core/slang-memory-arena.h"
#include "slang-artifact.h"
#include "slang-com-ptr.h"
namespace Slang
{
struct SliceAllocator;
struct SliceUtil
{
/// Convert into a list of strings
static List<String> toList(const Slice<TerminatedCharSlice>& in);
/// Gets a 0 terminated string from a blob. If not possible returns nullptr
static const char* getTerminated(ISlangBlob* blob, TerminatedCharSlice& outSlice);
/// NOTE! the slice is only guarenteed to stay in scope whilst the blob does
static TerminatedCharSlice toTerminatedCharSlice(SliceAllocator& allocator, ISlangBlob* blob);
///
static TerminatedCharSlice toTerminatedCharSlice(StringBuilder& storage, ISlangBlob* blob);
/// The slice will only be in scope whilst the string is
static TerminatedCharSlice asTerminatedCharSlice(const String& in)
{
auto unowned = in.getUnownedSlice();
return TerminatedCharSlice(unowned.begin(), unowned.getLength());
}
/// Get string as a char slice
static CharSlice asCharSlice(const String& in)
{
auto unowned = in.getUnownedSlice();
return CharSlice(unowned.begin(), unowned.getLength());
}
template<typename T>
static Slice<T*> asSlice(const List<ComPtr<T>>& list)
{
return makeSlice((T* const*)list.getBuffer(), list.getCount());
}
/// Get a list as a slice
template<typename T>
static Slice<T> asSlice(const List<T>& list)
{
return Slice<T>(list.getBuffer(), list.getCount());
}
template<typename T>
static List<ComPtr<T>> toComPtrList(const Slice<T*>& in)
{
ISlangUnknown* check = (T*)nullptr;
SLANG_UNUSED(check);
List<ComPtr<T>> list;
list.setCount(in.count);
for (Index i = 0; i < in.count; ++i)
list[i] = ComPtr<T>(in[i]);
return list;
}
private:
/*
A reason to wrap in a struct rather than have as free functions is doing so will lead to compile
time errors with incorrect usage around temporaries.
*/
/// We don't want to make a temporary list into a slice..
template<typename T>
static Slice<T> asSlice(const List<T>&& list) = delete;
// We don't want temporaries to be 'asSliced' so disable
static TerminatedCharSlice asTerminatedCharSlice(const String&& in) = delete;
static CharSlice asCharSlice(const String&& in) = delete;
};
SLANG_FORCE_INLINE UnownedStringSlice asStringSlice(const CharSlice& slice)
{
return UnownedStringSlice(slice.begin(), slice.end());
}
SLANG_FORCE_INLINE CharSlice asCharSlice(const UnownedStringSlice& slice)
{
return CharSlice(slice.begin(), slice.getLength());
}
SLANG_FORCE_INLINE String asString(const CharSlice& slice)
{
return String(slice.begin(), slice.end());
}
struct SliceAllocator
{
TerminatedCharSlice allocate(const Slice<char>& slice);
TerminatedCharSlice allocate(const UnownedStringSlice& slice);
TerminatedCharSlice allocate(const String& in) { return allocate(in.getUnownedSlice()); }
TerminatedCharSlice allocate(const char* in);
TerminatedCharSlice allocate(const char* start, const char* end)
{
return allocate(UnownedStringSlice(start, end));
}
Slice<TerminatedCharSlice> allocate(const List<String>& in);
/// Get the backing arena
MemoryArena& getArena() { return m_arena; }
void deallocateAll() { m_arena.deallocateAll(); }
SliceAllocator()
: m_arena(2097152)
{
}
protected:
MemoryArena m_arena;
};
} // namespace Slang
#endif
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