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- mmmmbbbbcccchhhhaaaarrrr((((3333CCCC)))) mmmmbbbbcccchhhhaaaarrrr((((3333CCCC))))
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- NNNNAAAAMMMMEEEE
- _mmmm_bbbb_cccc_hhhh_aaaa_rrrr: _mmmm_bbbb_tttt_oooo_wwww_cccc, _mmmm_bbbb_llll_eeee_nnnn, _wwww_cccc_tttt_oooo_mmmm_bbbb - multibyte character handling
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- SSSSYYYYNNNNOOOOPPPPSSSSIIIISSSS
- _####_iiii_nnnn_cccc_llll_uuuu_dddd_eeee _<<<<_ssss_tttt_dddd_llll_iiii_bbbb_...._hhhh_>>>>
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- _iiii_nnnn_tttt _mmmm_bbbb_tttt_oooo_wwww_cccc _((((_wwww_cccc_hhhh_aaaa_rrrr______tttt _****_pppp_wwww_cccc_,,,, _cccc_oooo_nnnn_ssss_tttt _cccc_hhhh_aaaa_rrrr _****_ssss_,,,, _ssss_iiii_zzzz_eeee______tttt _nnnn_))))_;;;;
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- _iiii_nnnn_tttt _mmmm_bbbb_llll_eeee_nnnn _((((_cccc_oooo_nnnn_ssss_tttt _cccc_hhhh_aaaa_rrrr _****_ssss_,,,, _ssss_iiii_zzzz_eeee______tttt _nnnn_))))_;;;;
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- _iiii_nnnn_tttt _wwww_cccc_tttt_oooo_mmmm_bbbb _((((_cccc_hhhh_aaaa_rrrr _****_ssss_,,,, _wwww_cccc_hhhh_aaaa_rrrr______tttt _wwww_cccc_hhhh_aaaa_rrrr_))))_;;;;
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- DDDDEEEESSSSCCCCRRRRIIIIPPPPTTTTIIIIOOOONNNN
- Multibyte characters are used to represent characters in an extended
- character set. This is needed for locales where 8 bits are not enough to
- represent all the characters in the character set.
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- The multibyte character handling functions provide the means of
- translating multibyte characters into wide characters and back again.
- Wide characters have type _wwww_cccc_hhhh_aaaa_rrrr______tttt (defined in _ssss_tttt_dddd_llll_iiii_bbbb_...._hhhh), which is an
- integral type whose range of values can represent distinct codes for all
- members of the largest extended character set specified among the
- supported locales.
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- A maximum of 3 extended character sets are supported for each locale.
- The number of bytes in an extended character set is defined by the
- _LLLL_CCCC______CCCC_TTTT_YYYY_PPPP_EEEE category of the locale [see _ssss_eeee_tttt_llll_oooo_cccc_aaaa_llll_eeee(3C)]. However, the
- maximum number of bytes in any multibyte character will never be greater
- than _MMMM_BBBB______LLLL_EEEE_NNNN______MMMM_AAAA_XXXX. which is defined in _llll_iiii_mmmm_iiii_tttt_ssss_...._hhhh. The maximum number of
- bytes in a character in an extended character set in the _cccc_uuuu_rrrr_rrrr_eeee_nnnn_tttt locale
- is given by the macro, _MMMM_BBBB______CCCC_UUUU_RRRR______MMMM_AAAA_XXXX, also defined in _ssss_tttt_dddd_llll_iiii_bbbb_...._hhhh.
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- _mmmm_bbbb_tttt_oooo_wwww_cccc determines the number of bytes that comprise the multibyte
- character pointed to by _s. Also, if _p_w_c is not a null pointer, _mmmm_bbbb_tttt_oooo_wwww_cccc
- converts the multibyte character to a wide character and places the
- result in the object pointed to by _p_w_c. (The value of the wide character
- corresponding to the null character is zero.) At most _n characters will
- be examined, starting at the character pointed to by _s.
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- If _s is a null pointer, _mmmm_bbbb_tttt_oooo_wwww_cccc simply returns 0. If _s is not a null
- pointer, then, if _s points to the null character, _mmmm_bbbb_tttt_oooo_wwww_cccc returns 0; if
- the next _n or fewer bytes form a valid multibyte character, _mmmm_bbbb_tttt_oooo_wwww_cccc
- returns the number of bytes that comprise the converted multibyte
- character; otherwise, _s does not point to a valid multibyte character and
- _mmmm_bbbb_tttt_oooo_wwww_cccc returns -1.
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- _mmmm_bbbb_llll_eeee_nnnn determines the number of bytes comprising the multibyte character
- pointed to by _s. It is equivalent to
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- mbtowc ((wchar_t *)0, s, n);
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- PPPPaaaaggggeeee 1111
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- mmmmbbbbcccchhhhaaaarrrr((((3333CCCC)))) mmmmbbbbcccchhhhaaaarrrr((((3333CCCC))))
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- _wwww_cccc_tttt_oooo_mmmm_bbbb determines the number of bytes needed to represent the multibyte
- character corresponding to the code whose value is _w_c_h_a_r, and, if _s is
- not a null pointer, stores the multibyte character representation in the
- array pointed to by _s. At most _MMMM_BBBB______CCCC_UUUU_RRRR______MMMM_AAAA_XXXX characters are stored.
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- If _s is a null pointer, _wwww_cccc_tttt_oooo_mmmm_bbbb simply returns 0. If _s is not a null
- pointer, _wwww_cccc_tttt_oooo_mmmm_bbbb returns -1 if the value of _w_c_h_a_r does not correspond to a
- valid multibyte character; otherwise it returns the number of bytes that
- comprise the multibyte character corresponding to the value of _w_c_h_a_r.
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- SSSSEEEEEEEE AAAALLLLSSSSOOOO
- _wwww_cccc_hhhh_rrrr_tttt_bbbb_llll(1M), _mmmm_bbbb_ssss_tttt_rrrr_iiii_nnnn_gggg(3C), _ssss_eeee_tttt_llll_oooo_cccc_aaaa_llll_eeee(3C), _eeee_nnnn_vvvv_iiii_rrrr_oooo_nnnn(5).
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- PPPPaaaaggggeeee 2222
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