-

[physik/morpheus.git] / random.c

diff --git a/random.c b/random.c
index 51f6774..5657eed 100644 (file)
--- a/random.c
+++ b/random.c
@@ -12,18 +12,23 @@
 /* global and extern variables */
 extern u32 gr;
 extern int random_fd;
+extern u32 *rand_buf,*rand_current;
 
 /* return random integer between 0 - max-1 */
 u32 rand_get(u32 max) 
 {
- u32 rand_int;
- if(read(random_fd,&rand_int,4)!=4)
+ if(rand_current==rand_buf+RAND_BUF_SIZE)
  {
-  puts("failed reading 4 bytes of random data");
-  return -23;
+  printfd("debug: reading new random bytes\n");
+  if(read(random_fd,rand_buf,RAND_BUF_SIZE)!=RAND_BUF_SIZE)
+  {
+   puts("failed reading viel bytes of random data");
+   return -23;
+  }
+  rand_current=rand_buf;
  }
  /* cells numbered 0...max-1 */
- return((u32)(rand_int*(max*1.0/URAND_MAX)));
+ return((u32)(*(rand_current++)*(max*1.0/URAND_MAX)));
 }
 
 /* get z value (linear growth of probability with depths) */
@@ -40,4 +45,3 @@ u32 rand_get_lgp(int slope_nel,int start_nel,u32 z_max)
  return(i-1); /* return values 0...z_cell-1 */
 }
 
-