4.4BSD/usr/share/man/cat4/euc.0
EUC(4) BSD Programmer's Manual EUC(4)
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EEUUCC - EUC encoding of runes
SSYYNNOOPPSSIISS
EENNCCOODDIINNGG ""EEUUCC""
VVAARRIIAABBLLEE _l_e_n_1 _m_a_s_k_1 _l_e_n_2 _m_a_s_k_2 _l_e_n_3 _m_a_s_k_3 _l_e_n_4 _m_a_s_k_4 _m_a_s_k
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The EEUUCC encoding is provided for compatibility with UNIX based systems.
See mklocale(1) for a complete description of the LC_CTYPE source file
format.
EEUUCC implements a system of 4 multibyte codesets. A multibyte character
in the first codeset consists of _l_e_n_1 bytes starting with a byte in the
range of 0x00 to 0x7f. To allow use of ASCII, _l_e_n_1 is always 1. A
multibyte character in the second codeset consists of _l_e_n_2 bytes starting
with a byte in the range of 0x80-0xff excluding 0x8e and 0x8f. A multi-
byte character in the third codeset consists of _l_e_n_3 bytes starting with
the byte 0x8e. A multibyte character in the fourth codeset consists of
_l_e_n_4 bytes starting with the byte 0x8f.
The rune_t encoding of EEUUCC multibyte characters is dependent on the _l_e_n
and _m_a_s_k arguments. First, the bytes are moved into a rune_t as follows:
byte0 << ((_l_e_nN-1) * 8) | byte1 << ((_l_e_nN-2) * 8) | ... | byte_l_e_nN-1
The result is then ANDed with _~_m_a_s_k and ORed with _m_a_s_k_N_. _C_o_d_e_s_e_t_s _2 _a_n_d _3
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EEXXAAMMPPLLEE -- JJaappaanneessee LLooccaallee
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_/_*
_* _T_h_i_s _i_s _f_o_r _C_o_d_e _S_e_t _3_, _h_a_l_f_-_w_i_d_t_h _k_a_n_a
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SSEEEE AALLSSOO
mklocale_(_1_)_, setlocale_(_3_)
4.4BSD June 4, 1993 _3