mjn3 noticed we were missing seed48, which was odd since we had

all the other *48 random functions.

3 files changed, 70 insertions, 1 deletions

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 <drepper@gnu.ai.mit.edu>, 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 <stdlib.h>
+
+/* 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 <drepper@gnu.ai.mit.edu>, 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 <stdlib.h>
+#include <string.h>
+#include <limits.h>
+
+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;
+}