Mac Developer Library Developer


This manual page is for Mac OS X version 10.9

If you are running a different version of Mac OS X, view the documentation locally:

  • In Terminal, using the man(1) command

Reading manual pages

Manual pages are intended as a quick reference for people who already understand a technology.

  • To learn how the manual is organized or to learn about command syntax, read the manual page for manpages(5).

  • For more information about this technology, look for other documentation in the Apple Developer Library.

  • For general information about writing shell scripts, read Shell Scripting Primer.

EUC(5)                      BSD File Formats Manual                     EUC(5)

     euc -- EUC encoding of wide characters


     VARIABLE len1 mask1 len2 mask2 len3 mask3 len4 mask4 mask

     EUC implements a system of 4 multibyte codesets.  A multibyte character in the first codeset consists
     of len1 bytes starting with a byte in the range of 0x00 to 0x7f.  To allow use of ASCII, len1 is always
     1.  A multibyte character in the second codeset consists of len2 bytes starting with a byte in the
     range of 0x80-0xff excluding 0x8e and 0x8f.  A multibyte character in the third codeset consists of
     len3 bytes starting with the byte 0x8e.  A multibyte character in the fourth codeset consists of len4
     bytes starting with the byte 0x8f.

     The wchar_t encoding of EUC multibyte characters is dependent on the len and mask arguments.  First,
     the bytes are moved into a wchar_t as follows:

     byte0 << ((lenN-1) * 8) | byte1 << ((lenN-2) * 8) | ... | bytelenN-1

     The result is then ANDed with ~mask and ORed with maskN.  Codesets 2 and 3 are special in that the
     leading byte (0x8e or 0x8f) is first removed and the lenN argument is reduced by 1.

     For example, the ja_JP.eucJP locale has the following VARIABLE line:

     VARIABLE        1 0x0000 2 0x8080 2 0x0080 3 0x8000 0x8080

     Codeset 1 consists of the values 0x0000 - 0x007f.

     Codeset 2 consists of the values who have the bits 0x8080 set.

     Codeset 3 consists of the values 0x0080 - 0x00ff.

     Codeset 4 consists of the values 0x8000 - 0xff7f excluding the values which have the 0x0080 bit set.

     Notice that the global mask is set to 0x8080, this implies that from those 2 bits the codeset can be

     mklocale(1), setlocale(3)

BSD                            November 8, 2003                            BSD

Reporting Problems

The way to report a problem with this manual page depends on the type of problem:

Content errors
Report errors in the content of this documentation with the feedback links below.
Bug reports
Report bugs in the functionality of the described tool or API through Bug Reporter.
Formatting problems
Report formatting mistakes in the online version of these pages with the feedback links below.