Niels Lohmann cc31370a78 Binary readers: swap the bytes of floats with a single byteswap ...

byte_swap reversed float and double values byte by byte. GCC does not
merge that loop into one bswap, and C++23's std::byteswap accepts only
integers. Overloads for float and double now copy the bits into a
uint32_t/uint64_t, call detail::byteswap, and copy them back. This
applies to every binary reader that uses get_number.

In the CBOR reader, the single- and double-precision float cases call a
non-inlined helper. Without it, GCC stopped inlining the stream
adapter's get_character() into parse_cbor_internal, which made reading
from a std::istream about 0.5 % slower.

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

2026-10-31 08:43:35 +01:00

..

nlohmann

Binary readers: swap the bytes of floats with a single byteswap

2026-10-31 08:43:35 +01:00