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authorRoland McGrath <roland@gnu.org>2005-02-10 09:40:23 +0000
committerRoland McGrath <roland@gnu.org>2005-02-10 09:40:23 +0000
commitf17c2202e4238b7408b8ee8ab742e5d2198cff6e (patch)
treebb7302826f1e982e4e3010e8cceacd0dbf7d3fc1 /stdlib/random_r.c
parent1a53c052c34ec4e934ba177b4f5bcf0b51be2ceb (diff)
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[BZ #710]
2005-02-09  Jakub Jelinek  <jakub@redhat.com>
	[BZ #710]
	* stdlib/random_r.c (__initstate_r): Save old state.
	* stdlib/Makefile (tests): Add tst-random2.
	* stdlib/tst-random2.c: New test.
	Reported by Peter Bergner <bergner@vnet.ibm.com>.

	(s390-.*-.*, powerpc.*-.*-.*, sparc.*-.*-.*): Add WORDSIZE64 entries
	for these mapping back to the above.
Diffstat (limited to 'stdlib/random_r.c')
-rw-r--r--stdlib/random_r.c11
1 files changed, 10 insertions, 1 deletions
diff --git a/stdlib/random_r.c b/stdlib/random_r.c
index 09677e6077..c85fd5eeef 100644
--- a/stdlib/random_r.c
+++ b/stdlib/random_r.c
@@ -1,5 +1,5 @@
 /* 
-   Copyright (C) 1995 Free Software Foundation
+   Copyright (C) 1995, 2005 Free Software Foundation
 
    The GNU C Library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
@@ -240,10 +240,19 @@ __initstate_r (seed, arg_state, n, buf)
   int degree;
   int separation;
   int32_t *state;
+  int old_type;
+  int32_t *old_state;
 
   if (buf == NULL)
     goto fail;
 
+  old_type = buf->rand_type;
+  old_state = buf->state;
+  if (old_type == TYPE_0)
+    old_state[-1] = TYPE_0;
+  else
+    old_state[-1] = (MAX_TYPES * (buf->rptr - old_state)) + old_type;
+
   if (n >= BREAK_3)
     type = n < BREAK_4 ? TYPE_3 : TYPE_4;
   else if (n < BREAK_1)