From b01e894ff8237322e369b65f04c57c111f10c810 Mon Sep 17 00:00:00 2001
From: pixel <pixel>
Date: Fri, 18 Jul 2008 14:05:39 +0000
Subject: Beautifying the code a bit.

---
 lib/RandISAAC.cc | 179 +++++++++++++++++++++++++++++++++----------------------
 1 file changed, 108 insertions(+), 71 deletions(-)

diff --git a/lib/RandISAAC.cc b/lib/RandISAAC.cc
index 2b0b09b..021bf20 100644
--- a/lib/RandISAAC.cc
+++ b/lib/RandISAAC.cc
@@ -17,7 +17,7 @@
  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 
-/* $Id: RandISAAC.cc,v 1.1 2008-07-18 14:01:49 pixel Exp $ */
+/* $Id: RandISAAC.cc,v 1.2 2008-07-18 14:05:39 pixel Exp $ */
 
 /* Based on ISAAC. See original (C) mention below. */
 
@@ -53,28 +53,30 @@ MODIFIED:
   *(r++) = b = (ind(mm,y>>RANDSIZL) + x) & 0xffffffff; \
 }
 
-void Random::isaac() {
-   Uint32 a,b,x,y,*m,*mm,*m2,*r,*mend;
-   mm=randmem; r=randrsl;
-   a = randa; b = (randb + (++randc)) & 0xffffffff;
-   for (m = mm, mend = m2 = m+(RANDSIZ/2); m<mend; )
-   {
-      rngstep( a<<13, a, b, mm, m, m2, r, x);
-      rngstep( a>>6 , a, b, mm, m, m2, r, x);
-      rngstep( a<<2 , a, b, mm, m, m2, r, x);
-      rngstep( a>>16, a, b, mm, m, m2, r, x);
-   }
-   for (m2 = mm; m2<mend; )
-   {
-      rngstep( a<<13, a, b, mm, m, m2, r, x);
-      rngstep( a>>6 , a, b, mm, m, m2, r, x);
-      rngstep( a<<2 , a, b, mm, m, m2, r, x);
-      rngstep( a>>16, a, b, mm, m, m2, r, x);
-   }
-   randb = b; randa = a;
+void Random::isaac()
+{
+    Uint32 a, b, x, y, *m, *mm, *m2, *r, *mend;
+
+    mm = randmem;
+    r = randrsl;
+    a = randa;
+    b = (randb + (++randc)) & 0xffffffff;
+    for (m = mm, mend = m2 = m + (RANDSIZ / 2); m < mend;) {
+        rngstep(a << 13, a, b, mm, m, m2, r, x);
+        rngstep(a >> 6, a, b, mm, m, m2, r, x);
+        rngstep(a << 2, a, b, mm, m, m2, r, x);
+        rngstep(a >> 16, a, b, mm, m, m2, r, x);
+    }
+    for (m2 = mm; m2 < mend;) {
+        rngstep(a << 13, a, b, mm, m, m2, r, x);
+        rngstep(a >> 6, a, b, mm, m, m2, r, x);
+        rngstep(a << 2, a, b, mm, m, m2, r, x);
+        rngstep(a >> 16, a, b, mm, m, m2, r, x);
+    }
+    randb = b;
+    randa = a;
 }
 
-
 #define mix(a,b,c,d,e,f,g,h) \
 { \
    a^=b<<11; d+=a; b+=c; \
@@ -87,60 +89,95 @@ void Random::isaac() {
    h^=a>>9;  c+=h; a+=b; \
 }
 
-/* if (flag==TRUE), then use the contents of randrsl[] to initialize mm[]. */
-void Random::randinit(int flag) {
-   int i;
-   Uint32 a,b,c,d,e,f,g,h;
-   Uint32 *m,*r;
-   randa = randb = randc = 0;
-   m=randmem;
-   r=randrsl;
-   a=b=c=d=e=f=g=h=0x9e3779b9;  /* the golden ratio */
-
-   for (i=0; i<4; ++i)          /* scramble it */
-   {
-     mix(a,b,c,d,e,f,g,h);
-   }
-
-   if (flag) 
-   {
-     /* initialize using the contents of r[] as the seed */
-     for (i=0; i<RANDSIZ; i+=8)
-     {
-       a+=r[i  ]; b+=r[i+1]; c+=r[i+2]; d+=r[i+3];
-       e+=r[i+4]; f+=r[i+5]; g+=r[i+6]; h+=r[i+7];
-       mix(a,b,c,d,e,f,g,h);
-       m[i  ]=a; m[i+1]=b; m[i+2]=c; m[i+3]=d;
-       m[i+4]=e; m[i+5]=f; m[i+6]=g; m[i+7]=h;
-     }
-     /* do a second pass to make all of the seed affect all of m */
-     for (i=0; i<RANDSIZ; i+=8)
-     {
-       a+=m[i  ]; b+=m[i+1]; c+=m[i+2]; d+=m[i+3];
-       e+=m[i+4]; f+=m[i+5]; g+=m[i+6]; h+=m[i+7];
-       mix(a,b,c,d,e,f,g,h);
-       m[i  ]=a; m[i+1]=b; m[i+2]=c; m[i+3]=d;
-       m[i+4]=e; m[i+5]=f; m[i+6]=g; m[i+7]=h;
-     }
-   }
-   else
-   {
-     for (i=0; i<RANDSIZ; i+=8)
-     {
-       /* fill in mm[] with messy stuff */
-       mix(a,b,c,d,e,f,g,h);
-       m[i  ]=a; m[i+1]=b; m[i+2]=c; m[i+3]=d;
-       m[i+4]=e; m[i+5]=f; m[i+6]=g; m[i+7]=h;
-     }
-   }
-
-   isaac();            /* fill in the first set of results */
-   randcnt=RANDSIZ;  /* prepare to use the first set of results */
+/*
+ * if (flag==TRUE), then use the contents of randrsl[] to initialize mm[]. 
+ */
+void Random::randinit(int flag)
+{
+    int i;
+
+    Uint32 a, b, c, d, e, f, g, h;
+
+    Uint32 *m, *r;
+
+    randa = randb = randc = 0;
+    m = randmem;
+    r = randrsl;
+    a = b = c = d = e = f = g = h = 0x9e3779b9; /* the golden ratio */
+
+    for (i = 0; i < 4; ++i) {   /* scramble it */
+        mix(a, b, c, d, e, f, g, h);
+    }
+
+    if (flag) {
+       /*
+        * initialize using the contents of r[] as the seed 
+        */
+        for (i = 0; i < RANDSIZ; i += 8) {
+            a += r[i];
+            b += r[i + 1];
+            c += r[i + 2];
+            d += r[i + 3];
+            e += r[i + 4];
+            f += r[i + 5];
+            g += r[i + 6];
+            h += r[i + 7];
+            mix(a, b, c, d, e, f, g, h);
+            m[i] = a;
+            m[i + 1] = b;
+            m[i + 2] = c;
+            m[i + 3] = d;
+            m[i + 4] = e;
+            m[i + 5] = f;
+            m[i + 6] = g;
+            m[i + 7] = h;
+        }
+       /*
+        * do a second pass to make all of the seed affect all of m 
+        */
+        for (i = 0; i < RANDSIZ; i += 8) {
+            a += m[i];
+            b += m[i + 1];
+            c += m[i + 2];
+            d += m[i + 3];
+            e += m[i + 4];
+            f += m[i + 5];
+            g += m[i + 6];
+            h += m[i + 7];
+            mix(a, b, c, d, e, f, g, h);
+            m[i] = a;
+            m[i + 1] = b;
+            m[i + 2] = c;
+            m[i + 3] = d;
+            m[i + 4] = e;
+            m[i + 5] = f;
+            m[i + 6] = g;
+            m[i + 7] = h;
+        }
+    } else {
+        for (i = 0; i < RANDSIZ; i += 8) {
+           /*
+            * fill in mm[] with messy stuff 
+            */
+            mix(a, b, c, d, e, f, g, h);
+            m[i] = a;
+            m[i + 1] = b;
+            m[i + 2] = c;
+            m[i + 3] = d;
+            m[i + 4] = e;
+            m[i + 5] = f;
+            m[i + 6] = g;
+            m[i + 7] = h;
+        }
+    }
+
+    isaac();                    /* fill in the first set of results */
+    randcnt = RANDSIZ;          /* prepare to use the first set of results */
 }
 
 Random::Random() {
     int i;
-    
+
     srand(time(NULL));
     for (i = 0; i < RANDSIZ; i++) {
         randrsl[i] = rand();
-- 
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