Coverage Report

Created: 2025-03-06 06:58

/src/wget/lib/basename.c
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Source (jump to first uncovered line)
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/* basename.c -- return the last element in a file name
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   Copyright (C) 1990, 1998-2001, 2003-2006, 2009-2025 Free Software
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   Foundation, Inc.
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   This program is free software: you can redistribute it and/or modify
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   it under the terms of the GNU General Public License as published by
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   the Free Software Foundation, either version 3 of the License, or
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   (at your option) any later version.
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   This program 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 General Public License for more details.
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   You should have received a copy of the GNU 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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#include "dirname.h"
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#include <string.h>
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#include "xalloc.h"
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char *
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base_name (char const *name)
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{
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  char const *base = last_component (name);
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  idx_t length;
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  int dotslash_len;
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  if (*base)
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    {
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      length = base_len (base);
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      /* Collapse a sequence of trailing slashes into one.  */
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      length += ISSLASH (base[length]);
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      /* On systems with drive letters, "a/b:c" must return "./b:c" rather
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         than "b:c" to avoid confusion with a drive letter.  On systems
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         with pure POSIX semantics, this is not an issue.  */
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      dotslash_len = FILE_SYSTEM_PREFIX_LEN (base) != 0 ? 2 : 0;
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    }
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  else
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    {
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      /* There is no last component, so NAME is a file system root or
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         the empty string.  */
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      base = name;
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      length = base_len (base);
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      dotslash_len = 0;
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    }
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  char *p = ximalloc (dotslash_len + length + 1);
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  if (dotslash_len)
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    {
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      p[0] = '.';
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      p[1] = '/';
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    }
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  /* Finally, copy the basename.  */
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  memcpy (p + dotslash_len, base, length);
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  p[dotslash_len + length] = '\0';
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  return p;
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}