Coverage Report

Created: 2025-01-28 06:58

/src/libunistring/lib/unistr/u8-uctomb-aux.c
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/* Conversion UCS-4 to UTF-8.
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   Copyright (C) 2002, 2006-2007, 2009-2024 Free Software Foundation, Inc.
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   Written by Bruno Haible <bruno@clisp.org>, 2002.
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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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#include "attribute.h"
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int
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u8_uctomb_aux (uint8_t *s, ucs4_t uc, ptrdiff_t n)
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474k
{
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  int count;
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  if (uc < 0x80)
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    /* The case n >= 1 is already handled by the caller.  */
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74.9k
    return -2;
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  else if (uc < 0x800)
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    count = 2;
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  else if (uc < 0x10000)
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    {
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      if (uc < 0xd800 || uc >= 0xe000)
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        count = 3;
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0
      else
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0
        return -1;
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203k
    }
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15.7k
  else if (uc < 0x110000)
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15.7k
    count = 4;
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0
  else
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    return -1;
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  if (n < count)
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    return -2;
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  switch (count) /* note: code falls through cases! */
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    {
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11.3k
    case 4: s[3] = 0x80 | (uc & 0x3f); uc = uc >> 6; uc |= 0x10000;
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      FALLTHROUGH;
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    case 3: s[2] = 0x80 | (uc & 0x3f); uc = uc >> 6; uc |= 0x800;
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      FALLTHROUGH;
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    case 2: s[1] = 0x80 | (uc & 0x3f); uc = uc >> 6; uc |= 0xc0;
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  /*case 1:*/ s[0] = uc;
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    }
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  return count;
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}