From 6f06a7e4c1594f710828540afa4416ca1a0df031 Mon Sep 17 00:00:00 2001 From: Eric Andersen Date: Fri, 5 Sep 2003 21:04:40 +0000 Subject: mjn3 noticed we were missing seed48, which was odd since we had all the other *48 random functions. --- libc/stdlib/Makefile | 3 ++- libc/stdlib/seed48.c | 30 ++++++++++++++++++++++++++++++ libc/stdlib/seed48_r.c | 38 ++++++++++++++++++++++++++++++++++++++ 3 files changed, 70 insertions(+), 1 deletion(-) create mode 100644 libc/stdlib/seed48.c create mode 100644 libc/stdlib/seed48_r.c diff --git a/libc/stdlib/Makefile b/libc/stdlib/Makefile index 01765c1f6..a60af2712 100644 --- a/libc/stdlib/Makefile +++ b/libc/stdlib/Makefile @@ -82,7 +82,8 @@ CSRC = abort.c getenv.c mkdtemp.c mktemp.c realpath.c mkstemp.c mkstemp64.c \ rand.c random.c random_r.c setenv.c system.c div.c ldiv.c getpt.c \ ptsname.c grantpt.c unlockpt.c gcvt.c drand48-iter.c jrand48.c \ jrand48_r.c lrand48.c lrand48_r.c mrand48.c mrand48_r.c nrand48.c \ - nrand48_r.c rand_r.c srand48.c srand48_r.c calloc.c valloc.c + nrand48_r.c rand_r.c srand48.c srand48_r.c seed48.c seed48_r.c \ + calloc.c valloc.c ifeq ($(UCLIBC_HAS_FLOATS),y) CSRC += drand48.c drand48_r.c erand48.c erand48_r.c endif diff --git a/libc/stdlib/seed48.c b/libc/stdlib/seed48.c new file mode 100644 index 000000000..ec1ef252e --- /dev/null +++ b/libc/stdlib/seed48.c @@ -0,0 +1,30 @@ +/* Copyright (C) 1995,1996,1997,1998,2001,2002 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper , August 1995. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library 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 + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include + +/* Global state for non-reentrant functions. Defined in drand48-iter.c. */ +extern struct drand48_data __libc_drand48_data; + +unsigned short int * +seed48 (unsigned short int seed16v[3]) +{ + (void) seed48_r (seed16v, &__libc_drand48_data); + return __libc_drand48_data.__old_x; +} diff --git a/libc/stdlib/seed48_r.c b/libc/stdlib/seed48_r.c new file mode 100644 index 000000000..734b5e39d --- /dev/null +++ b/libc/stdlib/seed48_r.c @@ -0,0 +1,38 @@ +/* Copyright (C) 1995, 1997, 1998, 2001 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper , August 1995. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library 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 + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include +#include +#include + +int seed48_r (unsigned short int seed16v[3], struct drand48_data *buffer) +{ + /* Save old value at a private place to be used as return value. */ + memcpy (buffer->__old_x, buffer->__x, sizeof (buffer->__x)); + + /* Install new state. */ + buffer->__x[2] = seed16v[2]; + buffer->__x[1] = seed16v[1]; + buffer->__x[0] = seed16v[0]; + buffer->__a = 0x5deece66dull; + buffer->__c = 0xb; + buffer->__init = 1; + + return 0; +} -- cgit v1.2.3