create tremded branch

1 files changed, 60 insertions, 0 deletions

diff --git a/external/nettle-3.3/nettle/sexp2bignum.c b/external/nettle-3.3/nettle/sexp2bignum.c
new file mode 100644
index 0000000..692ee42
--- /dev/null
+++ b/external/nettle-3.3/nettle/sexp2bignum.c
@@ -0,0 +1,60 @@
+/* sexp2bignum.c
+
+   Copyright (C) 2002 Niels Möller
+
+   This file is part of GNU Nettle.
+
+   GNU Nettle is free software: you can redistribute it and/or
+   modify it under the terms of either:
+
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at your
+       option) any later version.
+
+   or
+
+     * 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.
+
+   or both in parallel, as here.
+
+   GNU Nettle 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 copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see http://www.gnu.org/licenses/.
+*/
+
+#if HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include "sexp.h"
+#include "bignum.h"
+
+int
+nettle_mpz_set_sexp(mpz_t x, unsigned limit, struct sexp_iterator *i)
+{
+  if (i->type == SEXP_ATOM
+      && i->atom_length
+      && !i->display)
+    {
+      /* Allow some extra here, for leading sign octets. */
+      if (limit && (8 * i->atom_length > (16 + limit)))
+	return 0;
+      
+      nettle_mpz_set_str_256_s(x, i->atom_length, i->atom);
+
+      /* FIXME: How to interpret a limit for negative numbers? */
+      if (limit && mpz_sizeinbase(x, 2) > limit)
+	return 0;
+      
+      return sexp_iterator_next(i);
+    }
+  else
+    return 0;
+}