don't seed new RNGs to 0 by default; allow overriding RNG constructor

darcs-hash:20070205172439-c9803-1407272fc5941c986205b683b05756d7b52eca9e.gz

3 files changed, 16 insertions, 5 deletions

diff --git a/random/random.c b/random/random.c
index 5a07110..c08555d 100644
--- a/random/random.c
+++ b/random/random.c
@@ -2,14 +2,21 @@
 #include "random.h"
 #include "random-glib.h"
 
+static NiceRNG * (*nice_rng_new_func) (void) = NULL;
+
 NiceRNG *
 nice_rng_new (void)
 {
-  NiceRNG *rng;
+  if (nice_rng_new_func == NULL)
+    return nice_rng_glib_new ();
+  else
+    return nice_rng_new_func ();
+}
 
-  rng = nice_rng_glib_new ();
-  rng->seed (rng, 0);
-  return rng;
+void
+nice_rng_set_new_func (NiceRNG * (*func) (void))
+{
+  nice_rng_new_func = func;
 }
 
 void
diff --git a/random/random.h b/random/random.h
index 2e31e63..5315fb8 100644
--- a/random/random.h
+++ b/random/random.h
@@ -20,6 +20,9 @@ NiceRNG *
 nice_rng_new (void);
 
 void
+nice_rng_set_new_func (NiceRNG * (*func) (void));
+
+void
 nice_rng_seed (NiceRNG *rng, guint32 seed);
 
 void
diff --git a/random/test.c b/random/test.c
index fe55db3..d84b5c0 100644
--- a/random/test.c
+++ b/random/test.c
@@ -1,7 +1,7 @@
 
 #include <string.h>
 
-#include "random.h"
+#include "random-glib.h"
 
 int
 main (void)
@@ -9,6 +9,7 @@ main (void)
   NiceRNG *rng;
   gchar buf[9];
 
+  nice_rng_set_new_func (nice_rng_glib_new_predictable);
   rng = nice_rng_new ();
   nice_rng_generate_bytes_print (rng, 8, buf);
   buf[8] = '\0';