NAME

       set_ucodepage - Sets 8-bit to Unicode conversion tables. Allegro game programming library.

SYNOPSIS

       #include <allegro.h>

       void set_ucodepage(const unsigned short *table, const unsigned short *extras);

DESCRIPTION

       When  you select the U_ASCII_CP encoding mode, a set of tables are used to convert between
       8-bit characters and their Unicode equivalents. You can use this  function  to  specify  a
       custom set of mapping tables, which allows you to support different 8-bit codepages.

       The  `table'  parameter  points to an array of 256 shorts, which contain the Unicode value
       for each character in your codepage. The `extras' parameter, if not NULL, points to a list
       of  mapping  pairs,  which  will be used when reducing Unicode data to your codepage. Each
       pair consists of a Unicode value, followed by the way it should  be  represented  in  your
       codepage.   The  list  is  terminated by a zero Unicode value. This allows you to create a
       many->one mapping, where many different Unicode characters can be represented by a  single
       codepage value (eg. for reducing accented vowels to 7-bit ASCII).

       Allegro  will  use  the  `table'  parameter when it needs to convert an ASCII string to an
       Unicode string. But when Allegro converts an Unicode string to ASCII,  it  will  use  both
       parameters.  First,  it  will  loop  through  the  `table'  parameter looking for an index
       position pointing at the Unicode value it is trying to convert (ie. the `table'  parameter
       is  also  used  for  reverse  matching). If that fails, the `extras' list is used. If that
       fails too, Allegro will put the character `^', giving up the conversion.

       Note that Allegro comes with a default `table' and `extras' parameters set internally. The
       default  `table'  will convert 8-bit characters to `^'.  The default `extras' list reduces
       Latin-1 and Extended-A characters to 7 bits in a sensible way (eg. an accented vowel  will
       be reduced to the same vowel without the accent).

SEE ALSO

       set_uformat(3alleg4)