Count East Asian Wide and Full Fidth chars as two columns.

* regex.c (create_wide_cs): New static function.
(wide_display_char_p): New function.

* regex.h (wide_display_char_p): Declared.

* stream.c (put_string, put_char): Use wide_display_char_p
to determine whether an extra column need be counted.  Also bugfix:
iswprint evidently cannot be relied to work over the entire Unicode
range, at least not in the C locale. Glibc's version and is reporting
valid Japanese characters as unprintable on Ubuntu. As a hack we
instead check for control characters and invert the result: control
chars are unprintable.

* tests/009/json.expected: Updated.

1 files changed, 1 insertions, 1 deletions

diff --git a/regex.h b/regex.h
index 90695a1d..1aaa521b 100644
--- a/regex.h
+++ b/regex.h
@@ -39,5 +39,5 @@ val search_regst(val haystack, val needle_regex, val start_num, val from_end);
 val match_regst(val str, val regex, val pos);
 val match_regst_right(val str, val regex, val end);
 val regsub(val regex, val repl, val str);
-
+int wide_display_char_p(wchar_t ch);
 void regex_init(void);