Merge branch 'json-view/13-view-dump' into json-view/16-view-simd

Signed-off-by: Niels Lohmann <mail@nlohmann.me>

include/nlohmann/detail/view/node.hpp

@@ -29,6 +29,11 @@ static_assert(static_cast<std::uint8_t>(value_t::null) == 0 && static_cast<std::
               && static_cast<std::uint8_t>(value_t::number_unsigned) == 6 && static_cast<std::uint8_t>(value_t::number_float) == 7,
               "the node format depends on the numbering of value_t");
 
+/// The largest input a document accepts, in bytes. Offsets and node counts are
+/// 32 bits wide; the limit keeps 16 bytes (the width of the scanner's steps)
+/// below 2^32, so that a position one step past the end of the text fits.
+static constexpr std::size_t max_input_size = 0xFFFFFFEFu;
+
 /// node flags
 struct node_flags
 {
@@ -57,17 +62,27 @@ NLOHMANN_VIEW_ALWAYS_INLINE bool is_container(const node& n) noexcept
     return static_cast<unsigned>(n.kind) - 1u <= 1u;
 }
 
-/// the converted value of an integer node (stored in len/next)
+/// the converted value of an integer node: len is its low half, next its high
+/// half (on little-endian targets the two words are the value in memory)
 NLOHMANN_VIEW_ALWAYS_INLINE std::uint64_t integer_bits(const node& n) noexcept
 {
+#if NLOHMANN_VIEW_LITTLE_ENDIAN
     std::uint64_t v = 0;
     std::memcpy(&v, reinterpret_cast<const unsigned char*>(&n) + 8, 8); // NOLINT(cppcoreguidelines-pro-type-reinterpret-cast)
     return v;
+#else
+    return static_cast<std::uint64_t>(n.len) | (static_cast<std::uint64_t>(n.next) << 32);
+#endif
 }
 
 NLOHMANN_VIEW_ALWAYS_INLINE void set_integer_bits(node& n, std::uint64_t v) noexcept
 {
+#if NLOHMANN_VIEW_LITTLE_ENDIAN
     std::memcpy(reinterpret_cast<unsigned char*>(&n) + 8, &v, 8); // NOLINT(cppcoreguidelines-pro-type-reinterpret-cast)
+#else
+    n.len = static_cast<std::uint32_t>(v);
+    n.next = static_cast<std::uint32_t>(v >> 32);
+#endif
 }
 
 /// token length of a number node