maint/gnulib/lib/unistr/u16-uctomb-aux.c

/* */
This source file includes following definitions.
u16_uctomb_aux
   1 /* Conversion UCS-4 to UTF-16.
   2    Copyright (C) 2002, 2006-2007, 2009-2021 Free Software Foundation, Inc.
   3    Written by Bruno Haible <bruno@clisp.org>, 2002.
   4 
   5    This file is free software.
   6    It is dual-licensed under "the GNU LGPLv3+ or the GNU GPLv2+".
   7    You can redistribute it and/or modify it under either
   8      - the terms of the GNU Lesser General Public License as published
   9        by the Free Software Foundation; either version 3, or (at your
  10        option) any later version, or
  11      - the terms of the GNU General Public License as published by the
  12        Free Software Foundation; either version 2, or (at your option)
  13        any later version, or
  14      - the same dual license "the GNU LGPLv3+ or the GNU GPLv2+".
  15 
  16    This file is distributed in the hope that it will be useful,
  17    but WITHOUT ANY WARRANTY; without even the implied warranty of
  18    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  19    Lesser General Public License and the GNU General Public License
  20    for more details.
  21 
  22    You should have received a copy of the GNU Lesser General Public
  23    License and of the GNU General Public License along with this
  24    program.  If not, see <https://www.gnu.org/licenses/>.  */
  25 
  26 #include <config.h>
  27 
  28 /* Specification.  */
  29 #include "unistr.h"
  30 
  31 int
  32 u16_uctomb_aux (uint16_t *s, ucs4_t uc, ptrdiff_t n)
     /*  */
  33 {
  34   if (uc < 0xd800)
  35     {
  36       /* The case n >= 1 is already handled by the caller.  */
  37     }
  38   else if (uc < 0x10000)
  39     {
  40       if (uc >= 0xe000)
  41         {
  42           if (n >= 1)
  43             {
  44               s[0] = uc;
  45               return 1;
  46             }
  47         }
  48       else
  49         return -1;
  50     }
  51   else
  52     {
  53       if (uc < 0x110000)
  54         {
  55           if (n >= 2)
  56             {
  57               s[0] = 0xd800 + ((uc - 0x10000) >> 10);
  58               s[1] = 0xdc00 + ((uc - 0x10000) & 0x3ff);
  59               return 2;
  60             }
  61         }
  62       else
  63         return -1;
  64     }
  65   return -2;
  66 }
/* */
root/maint/gnulib/lib/unistr/u16-uctomb-aux.c

DEFINITIONS
