diff options
Diffstat (limited to 'src/codec/stream_value.h')
-rw-r--r-- | src/codec/stream_value.h | 64 |
1 files changed, 0 insertions, 64 deletions
diff --git a/src/codec/stream_value.h b/src/codec/stream_value.h deleted file mode 100644 index 09203cb..0000000 --- a/src/codec/stream_value.h +++ /dev/null @@ -1,64 +0,0 @@ -#pragma once - -#include "schema.h" - -#include <forstio/core/buffer.h> -#include <forstio/core/error.h> - -#include <cstdint> -#include <cstring> - -namespace saw { -/** - * Helper class to encode/decode any primtive type into/from litte endian. - * The shift class does this by shifting bytes. This type of procedure is - * platform independent. So it does not matter if the memory layout is - * little endian or big endian - */ -template<typename T> class shift_stream_value { - static_assert(always_false<T>, "Shift Stream Value only supports Primitives"); -}; - -template <typename T, size_t N> class shift_stream_value<schema::Primitive<T,N>> { -public: - inline static error_or<void> decode(typename native_data_type<schema::Primitive<T,N>>::type &val, buffer &buff) { - if (buff.read_composite_length() < N) { - return make_error<err::buffer_exhausted>(); - } - - typename native_data_type<schema::Primitive<schema::UnsignedInteger,N>>::type raw = 0; - - for (size_t i = 0; i < N; ++i) { - raw |= (static_cast<typename native_data_type<schema::Primitive<T,N>>::type>(buff.read(i)) << (i * 8)); - } - - memcpy(&val, &raw, N); - buff.read_advance(N); - - return void_t{}; - } - - inline static error_or<void> encode(const typename native_data_type<schema::Primitive<T,N>>::type &val, buffer &buff) { - error err = buff.write_require_length(N); - if (err.failed()) { - return err; - } - - typename native_data_type<schema::Primitive<schema::UnsignedInteger,N>>::type raw{}; - memcpy(&raw, &val, N); - - for (size_t i = 0; i < N; ++i) { - buff.write(i) = raw >> (i * 8); - } - - buff.write_advance(N); - - return void_t{}; - } - - inline static size_t size() { return N; } -}; - -template <typename T> using stream_value = shift_stream_value<T>; - -} // namespace saw |