started to implement pbp compatibility, added support for multiple -r options,

using it now to look through the vault for recipients, -i to follow. current
state: encrypt produces output without errors or crashes; decrypt is incompatible
for the moment.

include/pcp/util.h

@@ -0,0 +1,38 @@
+/*
+    This file is part of Pretty Curved Privacy (pcp1).
+
+    Copyright (C) 2013 T. von Dein.
+
+    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 3 of the License, 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, see <http://www.gnu.org/licenses/>.
+
+    You can contact me by mail: <tlinden AT cpan DOT org>.
+*/
+
+
+// various helpers
+
+#ifndef _HAVE_PCP_UTIL_H
+#define _HAVE_PCP_UTIL_H
+
+#include <ctype.h>
+
+static inline char *_lc(char *in) {
+  size_t len = strlen(in);
+  int i;
+  for(i=0; i<len; ++i)
+    in[i] = towlower(in[i]);
+  return in;
+}
+
+#endif // _HAVE_PCP_UTIL_H