X-Git-Url: http://git.bitcoin.ninja/index.cgi?p=shamirs;a=blobdiff_plain;f=shamirssecret.c;h=f440f49f21d7d2d9d7413f048b8cc546b38c0536;hp=9293f79eafea0282b28d43fbae7f8bcf4a2f75a1;hb=29918d3171bc7ca0f038da5385105adb9a3aaf00;hpb=7a6c59f40b44c243cecc3389db388c50e4979e07

diff --git a/shamirssecret.c b/shamirssecret.c
index 9293f79..f440f49 100644
--- a/shamirssecret.c
+++ b/shamirssecret.c
@@ -1,15 +1,36 @@
-#include <stdint.h>
+/*
+ * Shamir's secret sharing sharing implementation
+ *
+ * Copyright (C) 2013 Matt Corallo <git@bluematt.me>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope 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, write to the Free Software Foundation, Inc., 59 Temple
+ * Place - Suite 330, Boston, MA 02111-1307 USA.
+ */
 
 #ifndef IN_KERNEL
 #include <assert.h>
 #define CHECKSTATE(x) assert(x)
 #else
 #include <linux/bug.h>
-#define CHECKSTATE(x) BUG_ON(x)
+#define CHECKSTATE(x) BUG_ON(!(x))
 #endif
 
 #include "shamirssecret.h"
 
+#ifndef noinline
+#define noinline __attribute__((noinline))
+#endif
+
 /*
  * Calculations across the finite field GF(2^8)
  */
@@ -68,7 +89,7 @@ static const uint8_t log[P] = {
 	0x4a, 0xed, 0xde, 0xc5, 0x31, 0xfe, 0x18, 0x0d, 0x63, 0x8c, 0x80, 0xc0, 0xf7, 0x70, 0x07};
 
 // We disable lots of optimizations that result in non-constant runtime (+/- branch delays)
-static uint8_t field_mul_ret(uint8_t calc, uint8_t a, uint8_t b) __attribute__((optimize("-O0"))) __attribute__((noinline));
+static uint8_t field_mul_ret(uint8_t calc, uint8_t a, uint8_t b) __attribute__((optimize("-O0"))) noinline;
 static uint8_t field_mul_ret(uint8_t calc, uint8_t a, uint8_t b) {
 	uint8_t ret, ret2;
 	if (a == 0)
@@ -91,7 +112,7 @@ static uint8_t field_invert(uint8_t a) {
 }
 
 // We disable lots of optimizations that result in non-constant runtime (+/- branch delays)
-static uint8_t field_pow_ret(uint8_t calc, uint8_t a, uint8_t e) __attribute__((optimize("-O0"))) __attribute__((noinline));
+static uint8_t field_pow_ret(uint8_t calc, uint8_t a, uint8_t e) __attribute__((optimize("-O0"))) noinline;
 static uint8_t field_pow_ret(uint8_t calc, uint8_t a, uint8_t e) {
 	uint8_t ret, ret2;
 	if (a == 0)