Buffer protocol proposal (#3261)

* Add buffer protocol

* Modify for some review comments

* Per-object buffer availability

* Rename to MemoryView from Buffer and make compilable

* Support integral repeat count in memory view format

* Support 'x' for padding bytes

* Add rb_memory_view_parse_item_format

* Check type in rb_memory_view_register

* Update dependencies in common.mk

* Add test of MemoryView

* Add test of rb_memory_view_init_as_byte_array

* Add native size format test

* Add MemoryView test utilities

* Add test of rb_memory_view_fill_contiguous_strides

* Skip spaces in format string

* Support endianness specifiers

* Update documentation

* Support alignment

* Use RUBY_ALIGNOF

* Fix format parser to follow the pack format

* Support the _ modifier

* Parse count specifiers in get_format_size function.

* Use STRUCT_ALIGNOF

* Fix test

* Fix test

* Fix total size for the case with tail padding

* Fix rb_memory_view_get_item_pointer

* Fix rb_memory_view_parse_item_format again

1 files changed, 162 insertions, 0 deletions

diff --git a/common.mk b/common.mk
index 8a1864dbd8..cf4c6398ab 100644
--- a/common.mk
+++ b/common.mk
@@ -107,6 +107,7 @@ COMMONOBJS    = array.$(OBJEXT) \
 		load.$(OBJEXT) \
 		marshal.$(OBJEXT) \
 		math.$(OBJEXT) \
+		memory_view.$(OBJEXT) \
 		mjit.$(OBJEXT) \
 		mjit_compile.$(OBJEXT) \
 		node.$(OBJEXT) \
@@ -7998,6 +7999,167 @@ math.$(OBJEXT): {$(VPATH)}math.c
 math.$(OBJEXT): {$(VPATH)}missing.h
 math.$(OBJEXT): {$(VPATH)}st.h
 math.$(OBJEXT): {$(VPATH)}subst.h
+memory_view.$(OBJEXT): $(hdrdir)/ruby/ruby.h
+memory_view.$(OBJEXT): $(top_srcdir)/internal/util.h
+memory_view.$(OBJEXT): {$(VPATH)}assert.h
+memory_view.$(OBJEXT): {$(VPATH)}backward/2/assume.h
+memory_view.$(OBJEXT): {$(VPATH)}backward/2/attributes.h
+memory_view.$(OBJEXT): {$(VPATH)}backward/2/bool.h
+memory_view.$(OBJEXT): {$(VPATH)}backward/2/gcc_version_since.h
+memory_view.$(OBJEXT): {$(VPATH)}backward/2/inttypes.h
+memory_view.$(OBJEXT): {$(VPATH)}backward/2/limits.h
+memory_view.$(OBJEXT): {$(VPATH)}backward/2/long_long.h
+memory_view.$(OBJEXT): {$(VPATH)}backward/2/stdalign.h
+memory_view.$(OBJEXT): {$(VPATH)}backward/2/stdarg.h
+memory_view.$(OBJEXT): {$(VPATH)}config.h
+memory_view.$(OBJEXT): {$(VPATH)}defines.h
+memory_view.$(OBJEXT): {$(VPATH)}intern.h
+memory_view.$(OBJEXT): {$(VPATH)}internal.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/anyargs.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/arithmetic.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/arithmetic/char.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/arithmetic/double.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/arithmetic/fixnum.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/arithmetic/gid_t.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/arithmetic/int.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/arithmetic/intptr_t.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/arithmetic/long.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/arithmetic/long_long.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/arithmetic/mode_t.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/arithmetic/off_t.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/arithmetic/pid_t.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/arithmetic/short.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/arithmetic/size_t.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/arithmetic/st_data_t.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/arithmetic/uid_t.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/assume.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/attr/alloc_size.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/attr/artificial.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/attr/cold.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/attr/const.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/attr/constexpr.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/attr/deprecated.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/attr/diagnose_if.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/attr/enum_extensibility.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/attr/error.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/attr/flag_enum.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/attr/forceinline.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/attr/format.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/attr/maybe_unused.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/attr/noalias.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/attr/nodiscard.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/attr/noexcept.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/attr/noinline.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/attr/nonnull.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/attr/noreturn.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/attr/pure.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/attr/restrict.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/attr/returns_nonnull.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/attr/warning.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/attr/weakref.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/cast.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/compiler_is.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/compiler_is/apple.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/compiler_is/clang.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/compiler_is/gcc.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/compiler_is/intel.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/compiler_is/msvc.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/compiler_is/sunpro.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/compiler_since.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/config.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/constant_p.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/core.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/core/rarray.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/core/rbasic.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/core/rbignum.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/core/rclass.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/core/rdata.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/core/rfile.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/core/rhash.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/core/robject.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/core/rregexp.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/core/rstring.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/core/rstruct.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/core/rtypeddata.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/ctype.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/dllexport.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/dosish.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/error.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/eval.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/event.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/fl_type.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/gc.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/glob.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/globals.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/has/attribute.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/has/builtin.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/has/c_attribute.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/has/cpp_attribute.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/has/declspec_attribute.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/has/extension.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/has/feature.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/has/warning.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/intern/array.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/intern/bignum.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/intern/class.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/intern/compar.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/intern/complex.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/intern/cont.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/intern/dir.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/intern/enum.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/intern/enumerator.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/intern/error.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/intern/eval.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/intern/file.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/intern/gc.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/intern/hash.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/intern/io.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/intern/load.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/intern/marshal.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/intern/numeric.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/intern/object.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/intern/parse.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/intern/proc.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/intern/process.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/intern/random.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/intern/range.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/intern/rational.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/intern/re.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/intern/ruby.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/intern/select.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/intern/select/largesize.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/intern/signal.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/intern/sprintf.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/intern/string.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/intern/struct.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/intern/thread.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/intern/time.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/intern/variable.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/intern/vm.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/interpreter.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/iterator.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/memory.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/method.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/module.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/newobj.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/rgengc.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/scan_args.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/special_consts.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/static_assert.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/stdalign.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/stdbool.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/symbol.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/token_paste.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/value.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/value_type.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/variable.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/warning_push.h
+memory_view.$(OBJEXT): {$(VPATH)}internal/xmalloc.h
+memory_view.$(OBJEXT): {$(VPATH)}memory_view.c
+memory_view.$(OBJEXT): {$(VPATH)}memory_view.h
+memory_view.$(OBJEXT): {$(VPATH)}missing.h
+memory_view.$(OBJEXT): {$(VPATH)}st.h
+memory_view.$(OBJEXT): {$(VPATH)}subst.h
 miniinit.$(OBJEXT): $(CCAN_DIR)/check_type/check_type.h
 miniinit.$(OBJEXT): $(CCAN_DIR)/container_of/container_of.h
 miniinit.$(OBJEXT): $(CCAN_DIR)/list/list.h