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-rw-r--r--stdlib/random_r.c28
1 files changed, 17 insertions, 11 deletions
diff --git a/stdlib/random_r.c b/stdlib/random_r.c
index 09677e6077..5e564a737d 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
@@ -32,7 +32,7 @@
4. Neither the name of the University nor the names of its contributors
may be used to endorse or promote products derived from this software
without specific prior written permission.
-
+
THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
@@ -236,14 +236,20 @@ __initstate_r (seed, arg_state, n, buf)
size_t n;
struct random_data *buf;
{
- int type;
- int degree;
- int separation;
- int32_t *state;
-
if (buf == NULL)
goto fail;
+ int32_t *old_state = buf->state;
+ if (old_state != NULL)
+ {
+ int old_type = buf->rand_type;
+ if (old_type == TYPE_0)
+ old_state[-1] = TYPE_0;
+ else
+ old_state[-1] = (MAX_TYPES * (buf->rptr - old_state)) + old_type;
+ }
+
+ int type;
if (n >= BREAK_3)
type = n < BREAK_4 ? TYPE_3 : TYPE_4;
else if (n < BREAK_1)
@@ -258,13 +264,13 @@ __initstate_r (seed, arg_state, n, buf)
else
type = n < BREAK_2 ? TYPE_1 : TYPE_2;
- degree = random_poly_info.degrees[type];
- separation = random_poly_info.seps[type];
+ int degree = random_poly_info.degrees[type];
+ int separation = random_poly_info.seps[type];
buf->rand_type = type;
buf->rand_sep = separation;
buf->rand_deg = degree;
- state = &((int32_t *) arg_state)[1]; /* First location. */
+ int32_t *state = &((int32_t *) arg_state)[1]; /* First location. */
/* Must set END_PTR before srandom. */
buf->end_ptr = &state[degree];