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authorJakub Jelinek <jakub@redhat.com>2007-07-12 18:26:36 +0000
committerJakub Jelinek <jakub@redhat.com>2007-07-12 18:26:36 +0000
commit0ecb606cb6cf65de1d9fc8a919bceb4be476c602 (patch)
tree2ea1f8305970753e4a657acb2ccc15ca3eec8e2c /stdlib/random_r.c
parent7d58530341304d403a6626d7f7a1913165fe2f32 (diff)
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2.5-18.1
Diffstat (limited to 'stdlib/random_r.c')
-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];