tequilaOS/platform_bionic
2
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

Merge "Upgrade to the current NetBSD rand implementation."

Browse source
This commit is contained in:
Elliott Hughes 2012-10-01 14:05:08 -07:00 committed by Gerrit Code Review
commit cd195eba1f
12 changed files with 184 additions and 27 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

16
libc/Android.mk
View file

@ -140,7 +140,6 @@ libc_common_src_files := \
stdio/__sprintf_chk.c \
stdio/__vsnprintf_chk.c \
stdio/__vsprintf_chk.c \
stdlib/_rand48.c \
stdlib/assert.c \
stdlib/atexit.c \
stdlib/atoi.c \
@ -151,19 +150,14 @@ libc_common_src_files := \
stdlib/div.c \
stdlib/exit.c \
stdlib/getenv.c \
stdlib/jrand48.c \
stdlib/ldiv.c \
stdlib/lldiv.c \
stdlib/locale.c \
stdlib/lrand48.c \
stdlib/mrand48.c \
stdlib/nrand48.c \
stdlib/putenv.c \
stdlib/qsort.c \
stdlib/seed48.c \
stdlib/setenv.c \
stdlib/setjmperr.c \
stdlib/srand48.c \
stdlib/strntoimax.c \
stdlib/strntoumax.c \
stdlib/strtod.c \
@ -265,8 +259,6 @@ libc_common_src_files := \
bionic/clearenv.c \
bionic/dirname.c \
bionic/dirname_r.c \
bionic/drand48.c \
bionic/erand48.c \
bionic/err.c \
bionic/fdprintf.c \
bionic/fork.c \
@ -342,6 +334,14 @@ libc_upstream_netbsd_src_files := \
upstream-netbsd/libc/regex/regfree.c \
upstream-netbsd/libc/stdio/getdelim.c \
upstream-netbsd/libc/stdio/getline.c \
upstream-netbsd/libc/stdlib/drand48.c \
upstream-netbsd/libc/stdlib/erand48.c \
upstream-netbsd/libc/stdlib/jrand48.c \
upstream-netbsd/libc/stdlib/lrand48.c \
upstream-netbsd/libc/stdlib/mrand48.c \
upstream-netbsd/libc/stdlib/nrand48.c \
upstream-netbsd/libc/stdlib/_rand48.c \
upstream-netbsd/libc/stdlib/srand48.c \
upstream-netbsd/libc/stdlib/tdelete.c \
upstream-netbsd/libc/stdlib/tfind.c \
upstream-netbsd/libc/stdlib/tsearch.c \

10
libc/private/rand48.h
View file

@ -1,3 +1,5 @@
/* $NetBSD: rand48.h,v 1.6 2011/05/18 19:36:36 dsl Exp $ */
/*
* Copyright (c) 1993 Martin Birgmeier
* All rights reserved.
@ -9,17 +11,17 @@
* This software is provided ``as is'', and comes with no warranties
* of any kind. I shall in no event be liable for anything that happens
* to anyone/anything when using this software.
*
* $OpenBSD: rand48.h,v 1.3 2002/02/16 21:27:24 millert Exp $
*/
#ifndef _RAND48_H_
#define _RAND48_H_
#include <math.h>
#include <stdlib.h>
void __dorand48(unsigned short[3]);
extern void __dorand48(unsigned short[3]);
extern unsigned short __rand48_seed[3];
extern unsigned short __rand48_mult[3];
extern unsigned short __rand48_add;
#define RAND48_SEED_0 (0x330e)
#define RAND48_SEED_1 (0xabcd)

12
libc/stdlib/_rand48.c → libc/upstream-netbsd/libc/stdlib/_rand48.c
View file

@ -1,4 +1,5 @@
/* $OpenBSD: _rand48.c,v 1.3 2005/08/08 08:05:36 espie Exp $ */
/* $NetBSD: _rand48.c,v 1.7 2005/06/12 05:21:27 lukem Exp $ */
/*
* Copyright (c) 1993 Martin Birgmeier
* All rights reserved.
@ -12,6 +13,13 @@
* to anyone/anything when using this software.
*/
#include <sys/cdefs.h>
#if defined(LIBC_SCCS) && !defined(lint)
__RCSID("$NetBSD: _rand48.c,v 1.7 2005/06/12 05:21:27 lukem Exp $");
#endif /* LIBC_SCCS and not lint */
#include <assert.h>
#include "rand48.h"
unsigned short __rand48_seed[3] = {
@ -32,6 +40,8 @@ __dorand48(unsigned short xseed[3])
unsigned long accu;
unsigned short temp[2];
_DIAGASSERT(xseed != NULL);
accu = (unsigned long) __rand48_mult[0] * (unsigned long) xseed[0] +
(unsigned long) __rand48_add;
temp[0] = (unsigned short) accu; /* lower 16 bits */

10
libc/bionic/drand48.c → libc/upstream-netbsd/libc/stdlib/drand48.c
View file

@ -1,3 +1,5 @@
/* $NetBSD: drand48.c,v 1.6 2005/06/12 05:21:28 lukem Exp $ */
/*
* Copyright (c) 1993 Martin Birgmeier
* All rights reserved.
@ -12,10 +14,16 @@
*/
#include <sys/cdefs.h>
#if defined(LIBC_SCCS) && !defined(lint)
__RCSID("$NetBSD: drand48.c,v 1.6 2005/06/12 05:21:28 lukem Exp $");
#endif /* LIBC_SCCS and not lint */
#include "namespace.h"
#include "rand48.h"
extern unsigned short __rand48_seed[3];
#ifdef __weak_alias
__weak_alias(drand48,_drand48)
#endif
double
drand48(void)

17
libc/bionic/erand48.c → libc/upstream-netbsd/libc/stdlib/erand48.c
View file

@ -1,3 +1,5 @@
/* $NetBSD: erand48.c,v 1.9 2006/03/22 20:52:16 drochner Exp $ */
/*
* Copyright (c) 1993 Martin Birgmeier
* All rights reserved.
@ -12,12 +14,27 @@
*/
#include <sys/cdefs.h>
#if defined(LIBC_SCCS) && !defined(lint)
__RCSID("$NetBSD: erand48.c,v 1.9 2006/03/22 20:52:16 drochner Exp $");
#endif /* LIBC_SCCS and not lint */
#include "namespace.h"
#include <assert.h>
#include <math.h>
#include "rand48.h"
#ifdef __weak_alias
__weak_alias(erand48,_erand48)
#endif
double
erand48(unsigned short xseed[3])
{
_DIAGASSERT(xseed != NULL);
__dorand48(xseed);
return ldexp((double) xseed[0], -48) +
ldexp((double) xseed[1], -32) +

19
libc/stdlib/jrand48.c → libc/upstream-netbsd/libc/stdlib/jrand48.c
View file

@ -1,4 +1,5 @@
/* $OpenBSD: jrand48.c,v 1.3 2005/08/08 08:05:36 espie Exp $ */
/* $NetBSD: jrand48.c,v 1.8 2005/06/12 05:21:28 lukem Exp $ */
/*
* Copyright (c) 1993 Martin Birgmeier
* All rights reserved.
@ -12,11 +13,27 @@
* to anyone/anything when using this software.
*/
#include <sys/cdefs.h>
#if defined(LIBC_SCCS) && !defined(lint)
__RCSID("$NetBSD: jrand48.c,v 1.8 2005/06/12 05:21:28 lukem Exp $");
#endif /* LIBC_SCCS and not lint */
#include "namespace.h"
#include <assert.h>
#include "rand48.h"
#ifdef __weak_alias
__weak_alias(jrand48,_jrand48)
#endif
long
jrand48(unsigned short xseed[3])
{
_DIAGASSERT(xseed != NULL);
__dorand48(xseed);
return ((long) xseed[2] << 16) + (long) xseed[1];
}

16
libc/stdlib/lrand48.c → libc/upstream-netbsd/libc/stdlib/lrand48.c
View file

@ -1,4 +1,5 @@
/* $OpenBSD: lrand48.c,v 1.3 2005/08/08 08:05:36 espie Exp $ */
/* $NetBSD: lrand48.c,v 1.8 2005/06/12 05:21:28 lukem Exp $ */
/*
* Copyright (c) 1993 Martin Birgmeier
* All rights reserved.
@ -12,13 +13,22 @@
* to anyone/anything when using this software.
*/
#include <sys/cdefs.h>
#if defined(LIBC_SCCS) && !defined(lint)
__RCSID("$NetBSD: lrand48.c,v 1.8 2005/06/12 05:21:28 lukem Exp $");
#endif /* LIBC_SCCS and not lint */
#include "namespace.h"
#include "rand48.h"
extern unsigned short __rand48_seed[3];
#ifdef __weak_alias
__weak_alias(lrand48,_lrand48)
#endif
long
lrand48(void)
{
__dorand48(__rand48_seed);
return ((long) __rand48_seed[2] << 15) + ((long) __rand48_seed[1] >> 1);
return (long)((unsigned long) __rand48_seed[2] << 15) +
((unsigned long) __rand48_seed[1] >> 1);
}

13
libc/stdlib/mrand48.c → libc/upstream-netbsd/libc/stdlib/mrand48.c
View file

@ -1,4 +1,5 @@
/* $OpenBSD: mrand48.c,v 1.3 2005/08/08 08:05:37 espie Exp $ */
/* $NetBSD: mrand48.c,v 1.7 2005/06/12 05:21:28 lukem Exp $ */
/*
* Copyright (c) 1993 Martin Birgmeier
* All rights reserved.
@ -12,9 +13,17 @@
* to anyone/anything when using this software.
*/
#include <sys/cdefs.h>
#if defined(LIBC_SCCS) && !defined(lint)
__RCSID("$NetBSD: mrand48.c,v 1.7 2005/06/12 05:21:28 lukem Exp $");
#endif /* LIBC_SCCS and not lint */
#include "namespace.h"
#include "rand48.h"
extern unsigned short __rand48_seed[3];
#ifdef __weak_alias
__weak_alias(mrand48,_mrand48)
#endif
long
mrand48(void)

21
libc/stdlib/nrand48.c → libc/upstream-netbsd/libc/stdlib/nrand48.c
View file

@ -1,4 +1,5 @@
/* $OpenBSD: nrand48.c,v 1.3 2005/08/08 08:05:37 espie Exp $ */
/* $NetBSD: nrand48.c,v 1.9 2005/06/12 05:21:28 lukem Exp $ */
/*
* Copyright (c) 1993 Martin Birgmeier
* All rights reserved.
@ -12,11 +13,27 @@
* to anyone/anything when using this software.
*/
#include <sys/cdefs.h>
#if defined(LIBC_SCCS) && !defined(lint)
__RCSID("$NetBSD: nrand48.c,v 1.9 2005/06/12 05:21:28 lukem Exp $");
#endif /* LIBC_SCCS and not lint */
#include "namespace.h"
#include <assert.h>
#include "rand48.h"
#ifdef __weak_alias
__weak_alias(nrand48,_nrand48)
#endif
long
nrand48(unsigned short xseed[3])
{
_DIAGASSERT(xseed != NULL);
__dorand48(xseed);
return ((long) xseed[2] << 15) + ((long) xseed[1] >> 1);
return (long)((unsigned long) xseed[2] << 15) +
((unsigned long) xseed[1] >> 1);
}

17
libc/stdlib/srand48.c → libc/upstream-netbsd/libc/stdlib/srand48.c
View file

@ -1,4 +1,5 @@
/* $OpenBSD: srand48.c,v 1.3 2005/08/08 08:05:37 espie Exp $ */
/* $NetBSD: srand48.c,v 1.7 2005/06/12 05:21:28 lukem Exp $ */
/*
* Copyright (c) 1993 Martin Birgmeier
* All rights reserved.
@ -12,18 +13,24 @@
* to anyone/anything when using this software.
*/
#include <sys/cdefs.h>
#if defined(LIBC_SCCS) && !defined(lint)
__RCSID("$NetBSD: srand48.c,v 1.7 2005/06/12 05:21:28 lukem Exp $");
#endif /* LIBC_SCCS and not lint */
#include "namespace.h"
#include "rand48.h"
extern unsigned short __rand48_seed[3];
extern unsigned short __rand48_mult[3];
extern unsigned short __rand48_add;
#ifdef __weak_alias
__weak_alias(srand48,_srand48)
#endif
void
srand48(long seed)
{
__rand48_seed[0] = RAND48_SEED_0;
__rand48_seed[1] = (unsigned short) seed;
__rand48_seed[2] = (unsigned short) (seed >> 16);
__rand48_seed[2] = (unsigned short) ((unsigned long)seed >> 16);
__rand48_mult[0] = RAND48_MULT_0;
__rand48_mult[1] = RAND48_MULT_1;
__rand48_mult[2] = RAND48_MULT_2;

1
tests/Android.mk
View file

@ -23,6 +23,7 @@ test_src_files = \
pthread_test.cpp \
regex_test.cpp \
stdio_test.cpp \
stdlib_test.cpp \
string_test.cpp \
stubs_test.cpp \

59
tests/stdlib_test.cpp Normal file
View file

@ -0,0 +1,59 @@
/*
* Copyright (C) 2012 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <gtest/gtest.h>
#include <stdlib.h>
TEST(stdlib, drand48) {
srand48(0x01020304);
EXPECT_DOUBLE_EQ(0.65619299195623526, drand48());
EXPECT_DOUBLE_EQ(0.18522597229772941, drand48());
EXPECT_DOUBLE_EQ(0.42015087072844537, drand48());
EXPECT_DOUBLE_EQ(0.061637783047395089, drand48());
}
TEST(stdlib, lrand48_random_rand) {
srand48(0x01020304);
EXPECT_EQ(1409163720, lrand48());
EXPECT_EQ(397769746, lrand48());
EXPECT_EQ(902267124, lrand48());
EXPECT_EQ(132366131, lrand48());
#if __BIONIC__
// On bionic, random(3) is equivalent to lrand48...
srandom(0x01020304);
EXPECT_EQ(1409163720, random());
EXPECT_EQ(397769746, random());
EXPECT_EQ(902267124, random());
EXPECT_EQ(132366131, random());
// ...and rand(3) is the bottom 32 bits.
srand(0x01020304);
EXPECT_EQ(static_cast<int>(1409163720), rand());
EXPECT_EQ(static_cast<int>(397769746), rand());
EXPECT_EQ(static_cast<int>(902267124), rand());
EXPECT_EQ(static_cast<int>(132366131), rand());
#endif
}
TEST(stdlib, mrand48) {
srand48(0x01020304);
EXPECT_EQ(-1476639856, mrand48());
EXPECT_EQ(795539493, mrand48());
EXPECT_EQ(1804534249, mrand48());
EXPECT_EQ(264732262, mrand48());
}