syntax = "proto3";

package c_int64;

// Fixture for bd-awv (ra6 3l): 64-bit cdata fidelity.
//
// Carries one singular field per 64-bit proto kind. The C runtime
// must encode/decode each through LuaJIT int64_t/uint64_t cdata —
// never narrow to a Lua double — so values past 2^53 round-trip
// byte-equal and remain cdata after decode.
//
// Same convention as Tarantool's msgpackffi, net.box, box.tuple,
// and the built-in protobuf. See runtime/pb/wire.lua decoder
// comments for the per-kind type mapping.

message Wide {
  int64    a_int64    = 1;   // varint, sign-extended
  uint64   a_uint64   = 2;   // varint
  sint64   a_sint64   = 3;   // zigzag varint
  fixed64  a_fixed64  = 4;   // 8-byte LE unsigned
  sfixed64 a_sfixed64 = 5;   // 8-byte LE signed
}