From ba8f85b49c38af7bc2a9acdef5dcde2de008d25e Mon Sep 17 00:00:00 2001
From: peter <peter@FreeBSD.org>
Date: Sat, 12 Jul 2008 05:00:28 +0000
Subject: Flatten bind9 vendor work area
---
contrib/bind9/lib/isc/lfsr.c | 161 -------------------------------------------
1 file changed, 161 deletions(-)
delete mode 100644 contrib/bind9/lib/isc/lfsr.c
(limited to 'contrib/bind9/lib/isc/lfsr.c')
diff --git a/contrib/bind9/lib/isc/lfsr.c b/contrib/bind9/lib/isc/lfsr.c
deleted file mode 100644
index 61f9386..0000000
--- a/contrib/bind9/lib/isc/lfsr.c
+++ /dev/null
@@ -1,161 +0,0 @@
-/*
- * Copyright (C) 2004, 2005 Internet Systems Consortium, Inc. ("ISC")
- * Copyright (C) 1999-2002 Internet Software Consortium.
- *
- * Permission to use, copy, modify, and distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
- * copyright notice and this permission notice appear in all copies.
- *
- * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
- * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
- * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
- * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
- * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
- * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
- * PERFORMANCE OF THIS SOFTWARE.
- */
-
-/* $Id: lfsr.c,v 1.14.18.4 2005/10/14 01:28:29 marka Exp $ */
-
-/*! \file */
-
-#include <config.h>
-
-#include <stddef.h>
-#include <stdlib.h>
-
-#include <isc/assertions.h>
-#include <isc/lfsr.h>
-#include <isc/util.h>
-
-#define VALID_LFSR(x) (x != NULL)
-
-void
-isc_lfsr_init(isc_lfsr_t *lfsr, isc_uint32_t state, unsigned int bits,
- isc_uint32_t tap, unsigned int count,
- isc_lfsrreseed_t reseed, void *arg)
-{
- REQUIRE(VALID_LFSR(lfsr));
- REQUIRE(8 <= bits && bits <= 32);
- REQUIRE(tap != 0);
-
- lfsr->state = state;
- lfsr->bits = bits;
- lfsr->tap = tap;
- lfsr->count = count;
- lfsr->reseed = reseed;
- lfsr->arg = arg;
-
- if (count == 0 && reseed != NULL)
- reseed(lfsr, arg);
- if (lfsr->state == 0)
- lfsr->state = 0xffffffffU >> (32 - lfsr->bits);
-}
-
-/*!
- * Return the next state of the lfsr.
- */
-static inline isc_uint32_t
-lfsr_generate(isc_lfsr_t *lfsr)
-{
-
- /*
- * If the previous state is zero, we must fill it with something
- * here, or we will begin to generate an extremely predictable output.
- *
- * First, give the reseed function a crack at it. If the state is
- * still 0, set it to all ones.
- */
- if (lfsr->state == 0) {
- if (lfsr->reseed != NULL)
- lfsr->reseed(lfsr, lfsr->arg);
- if (lfsr->state == 0)
- lfsr->state = 0xffffffffU >> (32 - lfsr->bits);
- }
-
- if (lfsr->state & 0x01) {
- lfsr->state = (lfsr->state >> 1) ^ lfsr->tap;
- return (1);
- } else {
- lfsr->state >>= 1;
- return (0);
- }
-}
-
-void
-isc_lfsr_generate(isc_lfsr_t *lfsr, void *data, unsigned int count)
-{
- unsigned char *p;
- unsigned int bit;
- unsigned int byte;
-
- REQUIRE(VALID_LFSR(lfsr));
- REQUIRE(data != NULL);
- REQUIRE(count > 0);
-
- p = data;
- byte = count;
-
- while (byte--) {
- *p = 0;
- for (bit = 0; bit < 7; bit++) {
- *p |= lfsr_generate(lfsr);
- *p <<= 1;
- }
- *p |= lfsr_generate(lfsr);
- p++;
- }
-
- if (lfsr->count != 0 && lfsr->reseed != NULL) {
- if (lfsr->count <= count * 8)
- lfsr->reseed(lfsr, lfsr->arg);
- else
- lfsr->count -= (count * 8);
- }
-}
-
-static inline isc_uint32_t
-lfsr_skipgenerate(isc_lfsr_t *lfsr, unsigned int skip)
-{
- while (skip--)
- (void)lfsr_generate(lfsr);
-
- (void)lfsr_generate(lfsr);
-
- return (lfsr->state);
-}
-
-/*
- * Skip "skip" states in "lfsr".
- */
-void
-isc_lfsr_skip(isc_lfsr_t *lfsr, unsigned int skip)
-{
- REQUIRE(VALID_LFSR(lfsr));
-
- while (skip--)
- (void)lfsr_generate(lfsr);
-}
-
-/*
- * Skip states in lfsr1 and lfsr2 using the other's current state.
- * Return the final state of lfsr1 ^ lfsr2.
- */
-isc_uint32_t
-isc_lfsr_generate32(isc_lfsr_t *lfsr1, isc_lfsr_t *lfsr2)
-{
- isc_uint32_t state1, state2;
- isc_uint32_t skip1, skip2;
-
- REQUIRE(VALID_LFSR(lfsr1));
- REQUIRE(VALID_LFSR(lfsr2));
-
- skip1 = lfsr1->state & 0x01;
- skip2 = lfsr2->state & 0x01;
-
- /* cross-skip. */
- state1 = lfsr_skipgenerate(lfsr1, skip2);
- state2 = lfsr_skipgenerate(lfsr2, skip1);
-
- return (state1 ^ state2);
-}
--
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