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/* concatn.c: concatenate an arbitrary number of strings.
Copyright 1993, 1995, 2008, 2009 Karl Berry.
Copyright 1999, 2005 Olaf Weber.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this library; if not, see <http://www.gnu.org/licenses/>. */
#include <kpathsea/config.h>
#include <kpathsea/concatn.h>
/* OK, it would be epsilon more efficient to compute the total length
and then do the copying ourselves, but I doubt it matters in reality. */
string
concatn (const_string str1, ...)
{
string arg;
string ret;
va_list ap;
if (!str1)
return NULL;
ret = xstrdup (str1);
va_start (ap, str1);
while ((arg = va_arg (ap, string)) != NULL)
{
string temp = concat (ret, arg);
free (ret);
ret = temp;
}
va_end (ap);
return ret;
}
#ifdef TEST
int
main ()
{
printf ("null = \"%s\"\n", concatn (NULL));
printf ("\"a\" = \"%s\"\n", concatn ("a", NULL));
printf ("\"ab\" = \"%s\"\n", concatn ("a", "b", NULL));
printf ("\"abc\" = \"%s\"\n", concatn ("a", "b", "c", NULL));
printf ("\"abcd\" = \"%s\"\n", concatn ("ab", "cd", NULL));
printf ("\"abcde\" = \"%s\"\n", concatn ("ab", "c", "de", NULL));
printf ("\"abcdef\" = \"%s\"\n", concatn ("", "a", "", "bcd", "ef", NULL));
return 0;
}
#endif /* TEST */
/*
Local variables:
standalone-compile-command: "gcc -posix -g -I. -I.. -DTEST concatn.c kpathsea.a"
End:
*/
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