* Unify length field for embedded and heap strings
The length field is of the same type and position in RString for both
embedded and heap allocated strings, so we can unify it.
* Remove RSTRING_EMBED_LEN
Remove !USE_RVARGC code
[Feature #19579]
The Variable Width Allocation feature was turned on by default in Ruby
3.2. Since then, we haven't received bug reports or backports to the
non-Variable Width Allocation code paths, so we assume that nobody is
using it. We also don't plan on maintaining the non-Variable Width
Allocation code, so we are going to remove it.
Saves comitters' daily life by avoid #include-ing everything from
internal.h to make each file do so instead. This would significantly
speed up incremental builds.
We take the following inclusion order in this changeset:
1. "ruby/config.h", where _GNU_SOURCE is defined (must be the very
first thing among everything).
2. RUBY_EXTCONF_H if any.
3. Standard C headers, sorted alphabetically.
4. Other system headers, maybe guarded by #ifdef
5. Everything else, sorted alphabetically.
Exceptions are those win32-related headers, which tend not be self-
containing (headers have inclusion order dependencies).
* ext/-test-/string/cstr.c (bug_str_s_cstr_term_char): add a class
method to see plain Strings.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@49403 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* string.c (rb_string_value_cstr): fill minimum length of the encoding
as the terminator.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@41919 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
