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Niels Lohmann
edf8d17601
* MessagePack reader: read runs of scalar array elements in one loop As for CBOR: when an array opens and the input is contiguous, read the integers, floats, booleans, and nils that follow in a tight loop instead of going through parse_msgpack_internal and parse_msgpack_value for every element. The loop stops at any other kind of value and when fewer than 9 bytes are left; those values are read by the general path as before. Non-contiguous inputs are not affected. Signed-off-by: Niels Lohmann <mail@nlohmann.me> * MessagePack reader: enter the scalar run only when a scalar follows As for CBOR: enter_msgpack_array tests the first byte and the remaining length inline and calls the out-of-line run only for a scalar, so arrays of maps or strings no longer pay for a call that reads nothing; the run's loop condition moves to the end (do-while). Signed-off-by: Niels Lohmann <mail@nlohmann.me> * MessagePack reader: mark the initial accepted in the scalar run as a false-positive dead store ci_infer reports DEAD_STORE for 'bool accepted = true;' in the MessagePack scalar run, as in the CBOR one, because every case assigns accepted before it is read. Signed-off-by: Niels Lohmann <mail@nlohmann.me> * MessagePack tests: assign the parsed value instead of casting it to void GCC (ci_test_gcc) reports -Werror=unused-result for static_cast<void>(json::from_msgpack(...)): a cast to void does not silence warn_unused_result on GCC. Assign to a json, as the other tests in the file do. Signed-off-by: Niels Lohmann <mail@nlohmann.me> * MessagePack reader: drop the scalar pre-check before the run enter_msgpack_array now calls the run directly, and parse_msgpack_scalar_run tests the remaining count and length at the top of a while loop instead of relying on msgpack_scalar_follows(); its own switch already leaves on any value that is not a scalar. Instructions per repetition, new/old: SAX canada 0.946 (clang) and 0.973 (GCC 13), DOM read canada 0.991 / 0.992; no row more than 0.3 % higher. Signed-off-by: Niels Lohmann <mail@nlohmann.me> * MessagePack reader: say why the initial accepted in the scalar run stays As for CBOR: Infer's DEAD_STORE report is right, not a false positive. The initializer is kept for clang-tidy's cppcoreguidelines-init-variables. Signed-off-by: Niels Lohmann <mail@nlohmann.me> * MessagePack reader: give the scalar run the bulk tag instead of a wrapper As for CBOR: parse_msgpack_scalar_run takes the bulk-scan tag itself and is the function kept out of line, so parse_msgpack_array_start goes. Signed-off-by: Niels Lohmann <mail@nlohmann.me> * MessagePack reader: start the scalar run's accepted at false As for CBOR: Infer ignores dead stores of 0, so the suppression goes. Signed-off-by: Niels Lohmann <mail@nlohmann.me> * MessagePack reader: let the scalar run find its array itself As for CBOR: parse_msgpack_scalar_run reads container_stack.back() in its bulk version, so the caller no longer evaluates it for input that is not contiguous. Signed-off-by: Niels Lohmann <mail@nlohmann.me> --------- Signed-off-by: Niels Lohmann <mail@nlohmann.me>