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/* make-prefix.c: construct a pathname prefix.
Copyright (C) 1992 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
#include "config.h"
#include "concatn.h"
string
make_prefix (string prefix, string pathname)
{
string slash_pos = strrchr (pathname, '/');
if (slash_pos == NULL)
return concat (prefix, pathname);
else
{
string answer = NULL;
string path_only = xstrdup (pathname);
path_only[slash_pos - pathname] = 0;
answer = concatn (path_only, "/", prefix, slash_pos + 1, NULL);
free (path_only);
return answer;
}
}
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