* string.c ():
* string.c (single_byte_optimizable): make function inline. based
on a patch from Michael Selig <michael.selig at fs.com.au> in
[ruby-core:18532].
* string.c (str_modify_keep_cr): new function act as
rb_str_modify(), but don't clear coderange
* string.c (rb_str_casecmp): specialized for single byte strings.
* string.c (rb_str_splice): preserve coderange.
* string.c (rb_str_slice_bang, rb_str_reverse_bang,
rb_str_upcase_bang, rb_str_downcase_bang, tr_trans,
rb_str_capitalize_bang, rb_str_swapcase_bang,
rb_str_delete_bang, rb_str_chop_bang, rb_str_chomp_bang,
rb_str_lstrip_bang, rb_str_rstrip_bang): ditto.
* string.c (rb_str_clear): preset coderange.
* string.c (rb_str_split_m): specialized for splitting with a
string.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@19377 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
377eb14a9f