diff options
Diffstat (limited to 'erts')
| -rw-r--r-- | erts/doc/src/erlang.xml | 7 | ||||
| -rw-r--r-- | erts/emulator/beam/dist.h | 1 | ||||
| -rw-r--r-- | erts/emulator/beam/external.c | 8 | ||||
| -rw-r--r-- | erts/emulator/test/binary_SUITE.erl | 10 |
4 files changed, 14 insertions, 12 deletions
diff --git a/erts/doc/src/erlang.xml b/erts/doc/src/erlang.xml index e440a3d270..aeded7c719 100644 --- a/erts/doc/src/erlang.xml +++ b/erts/doc/src/erlang.xml @@ -6589,11 +6589,12 @@ ok some details of the encoding. This option was introduced in R11B-4. Currently, the allowed values for <c><anno>Version</anno></c> are <c>0</c> and <c>1</c>.</p> - <p><c>{minor_version, 1}</c> forces any floats in the term to be encoded + <p><c>{minor_version, 1}</c> is since 17.0 the default, it forces any floats in + the term to be encoded in a more space-efficient and exact way (namely in the 64-bit IEEE format, rather than converted to a textual representation). <c>binary_to_term/1</c> - in R11B-4 and later is able decode the new representation.</p> - <p><c>{minor_version, 0}</c> is currently the default, meaning that floats + in R11B-4 and later is able decode this representation.</p> + <p><c>{minor_version, 0}</c> meaning that floats will be encoded using a textual representation; this option is useful if you want to ensure that releases prior to R11B-4 can decode resulting binary.</p> diff --git a/erts/emulator/beam/dist.h b/erts/emulator/beam/dist.h index ff8f5e106f..0519a9225e 100644 --- a/erts/emulator/beam/dist.h +++ b/erts/emulator/beam/dist.h @@ -44,6 +44,7 @@ /* All flags that should be enabled when term_to_binary/1 is used. */ #define TERM_TO_BINARY_DFLAGS (DFLAG_EXTENDED_REFERENCES \ | DFLAG_NEW_FUN_TAGS \ + | DFLAG_NEW_FLOATS \ | DFLAG_EXTENDED_PIDS_PORTS \ | DFLAG_EXPORT_PTR_TAG \ | DFLAG_BIT_BINARIES) diff --git a/erts/emulator/beam/external.c b/erts/emulator/beam/external.c index 9fb2dbd8bf..b8e6b3b072 100644 --- a/erts/emulator/beam/external.c +++ b/erts/emulator/beam/external.c @@ -529,7 +529,7 @@ Uint erts_encode_ext_size(Eterm term) Uint erts_encode_ext_size_2(Eterm term, unsigned dflags) { - return encode_size_struct2(NULL, term, TERM_TO_BINARY_DFLAGS|dflags) + return encode_size_struct2(NULL, term, dflags) + 1 /* VERSION_MAGIC */; } @@ -1099,10 +1099,10 @@ BIF_RETTYPE term_to_binary_2(BIF_ALIST_2) if (tp[1] == am_minor_version && is_small(tp[2])) { switch (signed_val(tp[2])) { case 0: - flags = TERM_TO_BINARY_DFLAGS; + flags = TERM_TO_BINARY_DFLAGS & ~DFLAG_NEW_FLOATS; break; case 1: - flags = TERM_TO_BINARY_DFLAGS|DFLAG_NEW_FLOATS; + flags = TERM_TO_BINARY_DFLAGS; break; default: goto error; @@ -1605,9 +1605,9 @@ external_size_2(BIF_ALIST_2) if (tp[1] == am_minor_version && is_small(tp[2])) { switch (signed_val(tp[2])) { case 0: + flags &= ~DFLAG_NEW_FLOATS; break; case 1: - flags |= DFLAG_NEW_FLOATS; break; default: goto error; diff --git a/erts/emulator/test/binary_SUITE.erl b/erts/emulator/test/binary_SUITE.erl index a390c536bb..938aac6a0e 100644 --- a/erts/emulator/test/binary_SUITE.erl +++ b/erts/emulator/test/binary_SUITE.erl @@ -474,16 +474,16 @@ terms_compression_levels(_, _, _) -> ok. terms_float(Config) when is_list(Config) -> ?line test_floats(fun(Term) -> - Bin0 = term_to_binary(Term), Bin0 = term_to_binary(Term, [{minor_version,0}]), Term = binary_to_term_stress(Bin0), + Bin1 = term_to_binary(Term), Bin1 = term_to_binary(Term, [{minor_version,1}]), Term = binary_to_term_stress(Bin1), true = size(Bin1) < size(Bin0), - Size0 = erlang:external_size(Term), - Size00 = erlang:external_size(Term, [{minor_version, 0}]), - Size1 = erlang:external_size(Term, [{minor_version, 1}]), - true = (Size0 =:= Size00), + Size0 = erlang:external_size(Term, [{minor_version, 0}]), + Size1 = erlang:external_size(Term), + Size11 = erlang:external_size(Term, [{minor_version, 1}]), + true = (Size1 =:= Size11), true = Size1 < Size0 end). |