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diff --git a/src/regex/regex_test_lib.h b/src/regex/regex_test_lib.h
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+/*
+ *  This file is part of GNUnet
+ *  (C) 2012 Christian Grothoff (and other contributing authors)
+ * 
+ *  GNUnet 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 3, or (at your
+ *  option) any later version.
+ * 
+ *  GNUnet 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 GNUnet; see the file COPYING.  If not, write to the
+ *  Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ *  Boston, MA 02111-1307, USA.
+ */
+/**
+ * @file src/regex/regex_test_lib.h
+ * @brief library to read regexes representing IP networks from a file.
+ *        and simplyfinying the into one big regex, in order to run
+ *        tests (regex performance, mesh profiler).
+ * @author Bertlomiej Polot
+ *
+ */
+
+#ifndef GNUNET_REGEX_TEST_LIB_H
+#define GNUNET_REGEX_TEST_LIB_H
+
+
+#ifdef __cplusplus
+extern "C"
+{
+  #if 0                           /* keep Emacsens' auto-indent happy */
+}
+#endif
+#endif
+
+/**
+ * Combine an array of regexes into a single prefix-shared regex.
+ *
+ * @param regexes A NULL-terminated array of regexes.
+ *
+ * @retrun A string with a single regex that matches any of the original regexes
+ */
+char *
+GNUNET_REGEX_combine(char * const regexes[]);
+
+/**
+ * Read a set of regexes from a file, one per line and return them in an array
+ * suitable for GNUNET_REGEX_combine.
+ * The array must be free'd using GNUNET_REGEX_free_from_file.
+ *
+ * @param filename Name of the file containing the regexes.
+ *
+ * @return A newly allocated, NULL terminated array of regexes.
+ */
+char **
+GNUNET_REGEX_read_from_file (const char *filename);
+
+
+/**
+ * Free all memory reserved for a set of regexes created by read_from_file.
+ *
+ * @param regexes NULL-terminated array of regexes.
+ */
+void
+GNUNET_REGEX_free_from_file (char **regexes);
+
+#if 0                           /* keep Emacsens' auto-indent happy */
+{
+  #endif
+  #ifdef __cplusplus
+}
+#endif
+
+/* end of gnunet_regex_lib.h */
+#endif
+\ No newline at end of file