Tue Sep 1 17:24:05 2009 NAKAMURA Usaku <usa@ruby-lang.org>

* win32/win32.c (rb_w32_opendir, link, rb_w32_stati64, rb_w32_utime,

rb_w32_unlink): use WCHAR path internally.

* win32/win32.c, include/ruby/win32.h (rb_w32_wchown, rb_w32_wlink,

rb_w32_wstati64, rb_w32_wutime, rb_w32_wunlink): new functions those

accept WCHAR path.

* file.c (rb_stat, eaccess, access_internal, rb_file_s_ftype,

chmod_internal, rb_file_chmod, rb_file_chown, utime_internal,

rb_file_s_link, unlink_internal, rb_file_s_rename): use WCHAR version

runtime functions on Win32.

* file.c (rb_str_conv_for_path): guarantee that the return path always

ended with NUL charcter.

* file.c (apply2files, rb_stat, rb_file_s_lstat, rb_file_symlink_p,

rb_file_readable_p, rb_file_writable_p, rb_file_executable_p,

check3rdbyte, rb_file_identical_p, rb_file_chmod, rb_file_chown,

rb_file_s_link, rb_file_s_symlink, rb_file_s_rename): call

rb_str_conv_for_path() before passing the path to system, and

simple use RSTRING_PTR() instead of StringValueCStr().