X-Git-Url: https://hackdaworld.org/gitweb/?p=physik%2Fnlsop.git;a=blobdiff_plain;f=random.c;h=30a7fab1fe9efd98b9d43c5a35d364d9c48b8a14;hp=66943173da8d8bcc55b8ef190b57bd18df7efa59;hb=1b52e1f79e06531f0a98dc7e7c9fb514c10456bd;hpb=ac3628afff01679dfa9da69cf010764970e40be7

diff --git a/random.c b/random.c
index 6694317..30a7fab 100644
--- a/random.c
+++ b/random.c
@@ -10,6 +10,7 @@
 #include <fcntl.h>
 #include <unistd.h>
 #include <stdlib.h>
+#include <math.h>
 
 #include "random.h"
 
@@ -63,7 +64,7 @@ u32 get_rand(u32 max)
   }
   c_ptr=b_ptr;
  }
- 
+
  return((u32)(*(c_ptr++)*(max*1.0/((long long unsigned int)URAND_MAX+1))));
 }
 
@@ -72,3 +73,18 @@ u32 get_rand_lgp(u32 max,double a,double b)
  return((u32)(1.0*max*(-1.0*b+sqrt(b*b+2*a*((b+a/2)*get_rand(URAND_MAX)/((long long unsigned int)URAND_MAX+1))))/a));
 }
 
+u32 get_rand_reject(u32 max_x,u32 max_y,u32 *graph)
+{
+ u32 x,y;
+ unsigned char ok;
+
+ ok=0;
+ while(!ok)
+ {
+  x=get_rand(max_x);
+  y=get_rand(max_y);
+  if(y<=graph[x]) ok=1;
+ }
+
+ return x;
+}