/* 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 . */ #include #include /* 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: */