1 files changed, 87 insertions, 0 deletions
diff --git a/serialize/binary-reader.inl b/serialize/binary-reader.inl
new file mode 100644
index 00000000..cf935a76
--- /dev/null
+++ b/serialize/binary-reader.inl
@@ -0,0 +1,87 @@
+#pragma once
+#include "binary-reader.hpp"
+#include "compat/assert.hpp"
+
+namespace floormat::Serialize {
+
+template<string_input_iterator It>
+template<char_sequence Seq>
+constexpr binary_reader<It>::binary_reader(const Seq& seq) noexcept
+        : it{std::begin(seq)}, end{std::end(seq)}
+{}
+
+template<string_input_iterator It>
+constexpr binary_reader<It>::binary_reader(It begin, It end) noexcept :
+        it{begin}, end{end}
+{}
+
+template<string_input_iterator It>
+template<std::floating_point T>
+constexpr value_u binary_reader<It>::read_u() noexcept
+{
+    value_u buf;
+    static_assert(sizeof(T) <= sizeof(buf));
+    fm_assert(std::distance(it, end) >= sizeof(T));
+    num_bytes_read += sizeof(T);
+    for (int i = 0; i < sizeof(T); i++)
+        buf.bytes[i] = *it++;
+    return buf;
+}
+
+template<string_input_iterator It>
+template<typename T>
+T binary_reader<It>::read() noexcept
+{
+    value_u buf = read_u<T>();
+    return *reinterpret_cast<T>(buf.bytes);
+}
+
+template<string_input_iterator It>
+template<std::size_t N>
+constexpr std::array<char, N> binary_reader<It>::read() noexcept
+{
+    std::array<char, N> array;
+    if (std::is_constant_evaluated())
+        array = {};
+    fm_assert(N <= (std::size_t)std::distance(it, end));
+    num_bytes_read += N;
+    for (std::size_t i = 0; i < N; i++)
+        array[i] = *it++;
+    return array;
+}
+
+template<string_input_iterator It>
+constexpr void binary_reader<It>::assert_end() noexcept
+{
+    fm_assert(it == end);
+}
+
+template<string_input_iterator It>
+template<integer T>
+constexpr value_u binary_reader<It>::read_u() noexcept
+{
+    value_u buf;
+    if (std::is_constant_evaluated())
+        for (std::size_t i = 0; i < std::size(buf.bytes); i++)
+            buf.bytes[i] = 0;
+    static_assert(sizeof(T) <= sizeof(buf));
+    fm_assert((std::ptrdiff_t)sizeof(T) <= std::distance(it, end));
+    num_bytes_read += sizeof(T);
+    if constexpr(std::endian::native == std::endian::big)
+        for (int i = sizeof(T) - 1; i >= 0; i--)
+            buf.bytes[i] = *it++;
+    else
+        for (std::size_t i = 0; i < sizeof(T); i++)
+            buf.bytes[i] = *it++;
+    return buf;
+}
+
+template<string_input_iterator It, serializable T>
+binary_reader<It>& operator>>(binary_reader<It>& reader, T& x) noexcept
+{
+    value_u u = reader.template read<T>();
+    x = *reinterpret_cast<T*>(&u.bytes[0]);
+    return reader;
+}
+
+} // namespace floormat::Serialize