* include/ruby/encoding.h (rb_isascii): defined.
(rb_isalnum): ditto.
(rb_isalpha): ditto.
(rb_isblank): ditto.
(rb_iscntrl): ditto.
(rb_isdigit): ditto.
(rb_isgraph): ditto.
(rb_islower): ditto.
(rb_isprint): ditto.
(rb_ispunct): ditto.
(rb_isspace): ditto.
(rb_isupper): ditto.
(rb_isxdigit): ditto.
(rb_tolower): ditto.
(rb_toupper): ditto.
* include/ruby/st.h (st_strcasecmp): declared.
(st_strncasecmp): ditto.
* st.c (type_strcasehash): use st_strcasecmp instead of strcasecmp.
(st_strcasecmp): defined.
(st_strncasecmp): ditto.
* include/ruby/ruby.h: include include/ruby/encoding.h.
(ISASCII): use rb_isascii.
(ISPRINT): use rb_isprint.
(ISSPACE): use rb_isspace.
(ISUPPER): use rb_isupper.
(ISLOWER): use rb_islower.
(ISALNUM): use rb_isalnum.
(ISALPHA): use rb_isalpha.
(ISDIGIT): use rb_isdigit.
(ISXDIGIT): use rb_isxdigit.
(TOUPPER): defined.
(TOLOWER): ditto.
(STRCASECMP): ditto.
(STRNCASECMP): ditto.
* dir.c, encoding.c, file.c, hash.c, process.c, ruby.c, time.c,
transcode.c, ext/readline/readline.c: use locale insensitive
functions. [ruby-core:14662]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@14829 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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