h_mbtowc
h_mbtowc("en_US.UTF-8", "\240", "\302\240", 0);
h_mbtowc("ja_JP.ISO2022-JP", "\033$B", "\033$B$\"\033(B", 1);
h_mbtowc("ja_JP.SJIS", "\202", "\202\240", 0);
h_mbtowc("ja_JP.eucJP", "\244", "\244\242", 0);
h_mbtowc("zh_CN.GB18030", "\241", "\241\241", 0);
h_mbtowc("zh_TW.Big5", "\241", "\241@", 0);
h_mbtowc("zh_TW.eucTW", "\241", "\241\241", 0);