Coverage Report

Created: 2025-03-06 07:58

/src/gnutls/lib/unistring/unistr/u16-mbtoucr.c
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/* Look at first character in UTF-16 string, returning an error code.
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   Copyright (C) 1999-2002, 2006-2007, 2009-2025 Free Software Foundation, Inc.
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   Written by Bruno Haible <bruno@clisp.org>, 2001.
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   This file is free software: you can redistribute it and/or modify
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   it under the terms of the GNU Lesser General Public License as
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   published by the Free Software Foundation; either version 2.1 of the
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   License, or (at your option) any later version.
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   This file is distributed in the hope that it will be useful,
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   but WITHOUT ANY WARRANTY; without even the implied warranty of
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   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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   GNU Lesser General Public License for more details.
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   You should have received a copy of the GNU Lesser General Public License
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   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
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#include <config.h>
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/* Specification.  */
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#include "unistr.h"
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int
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u16_mbtoucr (ucs4_t *puc, const uint16_t *s, size_t n)
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0
{
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  uint16_t c = *s;
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  if (c < 0xd800 || c >= 0xe000)
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    {
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      *puc = c;
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      return 1;
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    }
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  if (c < 0xdc00)
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    {
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      if (n >= 2)
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        {
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          if (s[1] >= 0xdc00 && s[1] < 0xe000)
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            {
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              *puc = 0x10000 + ((c - 0xd800) << 10) + (s[1] - 0xdc00);
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              return 2;
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            }
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          /* invalid multibyte character */
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        }
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      else
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        {
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          /* incomplete multibyte character */
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          *puc = 0xfffd;
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          return -2;
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        }
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    }
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  /* invalid multibyte character */
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  *puc = 0xfffd;
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  return -1;
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0
}