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

/* */
This source file includes following definitions.
u16_uctomb
   1 /* Store a character in UTF-16 string.
   2    Copyright (C) 2002, 2005-2006, 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 #if defined IN_LIBUNISTRING
  29 /* Tell unistr.h to declare u16_uctomb as 'extern', not 'static inline'.  */
  30 # include "unistring-notinline.h"
  31 #endif
  32 
  33 /* Specification.  */
  34 #include "unistr.h"
  35 
  36 #if !HAVE_INLINE
  37 
  38 int
  39 u16_uctomb (uint16_t *s, ucs4_t uc, ptrdiff_t n)
     /*  */
  40 {
  41   if (uc < 0xd800)
  42     {
  43       if (n > 0)
  44         {
  45           s[0] = uc;
  46           return 1;
  47         }
  48       /* else return -2, below.  */
  49     }
  50   else if (uc < 0x10000)
  51     {
  52       if (uc >= 0xe000)
  53         {
  54           if (n >= 1)
  55             {
  56               s[0] = uc;
  57               return 1;
  58             }
  59         }
  60       else
  61         return -1;
  62     }
  63   else
  64     {
  65       if (uc < 0x110000)
  66         {
  67           if (n >= 2)
  68             {
  69               s[0] = 0xd800 + ((uc - 0x10000) >> 10);
  70               s[1] = 0xdc00 + ((uc - 0x10000) & 0x3ff);
  71               return 2;
  72             }
  73         }
  74       else
  75         return -1;
  76     }
  77   return -2;
  78 }
  79 
  80 #endif
/* */
root/maint/gnulib/lib/unistr/u16-uctomb.c

DEFINITIONS
