termlen and resize heap for the terminator. This is split from
  rb_str_fill_terminator (str_fill_term) because filling terminator
  and changing terminator length are different things. [Bug #12536]

* internal.h: declaration for rb_str_change_terminator_length.

* string.c (str_fill_term): Simplify only to zero-fill the terminator.
  For non-shared strings, it assumes that (capa + termlen) bytes of
  heap is allocated. This partially reverts r55557.

* encoding.c (rb_enc_associate_index): rb_str_change_terminator_length
  is used, and it should be called whenever the termlen is changed.

* string.c (str_capacity): New static function to return capacity
  of a string with the given termlen, because the termlen may
  sometimes be different from TERM_LEN(str) especially during
  changing termlen or filling terminator with specific termlen.

* string.c (rb_str_capacity): Use str_capacity.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@55575 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

  [Bug #12313][ruby-core:75147][ci skip]
* ext/bigdecimal/bigdecimal.c: Fix code sample of `BigDecimal.new`

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@54755 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

  rb_isalnum, rb_isxdigit, rb_isblank, rb_isspace, rb_isblank,
  rb_iscntrl, rb_isprint, rb_ispunct, rb_isgraph,
  rb_tolower, rb_toupper): use inline function to avoid function call.

* include/ruby/ruby.h (rb_isascii): use inline function to clarify
  the logic.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@54391 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

* error.c (rb_assert_failure): assertion with stack dump.
* ruby_assert.h (RUBY_ASSERT): new header for the assertion.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@53615 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

  and a pre-compilation/runtime loader sample.
  [Feature #11788]

* iseq.c: add new methods:
  * RubyVM::InstructionSequence#to_binary_format(extra_data = nil)
  * RubyVM::InstructionSequence.from_binary_format(binary)
  * RubyVM::InstructionSequence.from_binary_format_extra_data(binary)

* compile.c: implement body of this new feature.

* load.c (rb_load_internal0), iseq.c (rb_iseq_load_iseq):
  call RubyVM::InstructionSequence.load_iseq(fname) with
  loading script name if this method is defined.

  We can return any ISeq object as a result value.
  Otherwise loading will be continue as usual.

  This interface is not matured and is not extensible.
  So that we don't guarantee the future compatibility of this method.
  Basically, you should'nt use this method.

* iseq.h: move ISEQ_MAJOR/MINOR_VERSION (and some definitions)
  from iseq.c.

* encoding.c (rb_data_is_encoding), internal.h: added.

* vm_core.h: add several supports for lazy load.
  * add USE_LAZY_LOAD macro to specify enable or disable of
    this feature.
  * add several fields to rb_iseq_t.
  * introduce new macro rb_iseq_check().

* insns.def: some check for lazy loading feature.

* vm_insnhelper.c: ditto.

* proc.c: ditto.

* vm.c: ditto.

* test/lib/iseq_loader_checker.rb: enabled iff suitable
  environment variables are provided.

* test/runner.rb: enable lib/iseq_loader_checker.rb.

* sample/iseq_loader.rb: add sample compiler and loader.

    $ ruby sample/iseq_loader.rb [dir]

  will compile all ruby scripts in [dir].
  With default setting, this compile creates *.rb.yarb files
  in same directory of target .rb scripts.

    $ ruby -r sample/iseq_loader.rb [app]

  will run with enable to load compiled binary data.




git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@52949 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

* encoding.c (enc_name, rb_enc_name_list_i, rb_enc_aliases_enc_i):
  make fstring instead of making each copies.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@52859 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

* encoding.c (enc_m_loader): defer finding encoding object not to
  be infected by marshal source.  [ruby-core:71793] [Bug #11760]
* marshal.c (r_object0): enable compatible loader on USERDEF
  class.  the loader function is called with the class itself,
  instead of an allocated object, and the loaded data.
* marshal.c (compat_allocator_table): intialize
  compat_allocator_tbl on demand.
* object.c (rb_undefined_alloc): extract from rb_obj_alloc.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@52856 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

* encoding.c (enc_dump): use rb_check_arity to just check number
  of arguments.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@52854 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

* encoding.c (ENC_ASSERT): make an expression, and prevent the
  argument from further expansions.

* encoding.c (rb_enc_check_str): assert before using.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@52359 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

* encoding.c (enc_compatible_latter): adjust indent.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@52355 b2dd03c8-39d4-4d8f-98ff-823fe69b080e