kc3-lang/gnulib/lib/ucs4-utf16.h

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• Hash : 4bc0a0ad
  Author :
  Date : 2003-04-03T18:35:07
  

  New modules: utf8-ucs4, utf16-ucs4, ucs4-utf8, ucs4-utf16.
  

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• lib/ucs4-utf16.h

• /* Conversion UCS-4 to UTF-16.
     Copyright (C) 2002 Free Software Foundation, Inc.
     Written by Bruno Haible <haible@clisp.cons.org>, 2002.
  
  This program is free software; you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation; either version 2, or (at your option)
  any later version.
  
  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.
  
  You should have received a copy of the GNU General Public License
  along with this program; if not, write to the Free Software
  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  
  
  #include <stddef.h>
  
  /* Return the length (number of units) of the UTF-16 representation of uc,
     after storing it at S.  Return -1 upon failure, -2 if the number of
     available units, N, is too small.  */
  static int
  u16_uctomb_aux (unsigned short *s, unsigned int uc, int n)
  {
    if (uc >= 0x10000)
      {
        if (uc < 0x110000)
  	{
  	  if (n >= 2)
  	    {
  	      s[0] = 0xd800 + ((uc - 0x10000) >> 10);
  	      s[1] = 0xdc00 + ((uc - 0x10000) & 0x3ff);
  	      return 2;
  	    }
  	}
        else
  	return -1;
      }
    return -2;
  }
  
  static inline int
  u16_uctomb (unsigned short *s, unsigned int uc, int n)
  {
    if (uc < 0x10000 && n > 0)
      {
        s[0] = uc;
        return 1;
      }
    else
      return u16_uctomb_aux (s, uc, n);
  }
  

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