random number generation organized

ChangeLog

@@ -1,3 +1,10 @@
+2008-11-29 Holger Vogt
+ * frontend/numparam/xpressn.c: rand() and gauss() moved to 
+   math/misc/randnumb.c
+ * 'set rndseed=value' value = integer > 0 in spinit will yield
+   deterministic pseudo random number sequence.
+ * random() and rand() with correspongding max value  
+
 2008-11-26 Dietmar Warning
  * src/spicelib/devices/bsim4v4, bsim4v5: this is a backup because the patch of 
  Phil Barker are providing only a placeholder for propriarity sti stress model - 

src/frontend/numparam/xpressn.c

@@ -10,15 +10,8 @@
 #include "numparam.h"
 #include "ngspice.h"
 
-/* MINGW: random in libiberty.a, but not in libiberty.h */
-#if defined(__MINGW32__) && defined(HAVE_RANDOM)
-extern long int random (void);
-#endif
-
-/* agauss added by Stephan Thiel June 2008 */
-#define Rand_Call random
-#define Rand_Seed srandom
-#define Rand_Range 1073741824
+/* random numbers in /maths/misc/randnumb.c */
+extern double gauss();
 
 /************ keywords ************/
 
@@ -27,19 +20,6 @@ static Str (150, keys);                /* all my keywords */
 static Str (150, fmath);        /* all math functions */
 
 
-/*
-static double
-max (double x, double y)
-{
-  return (x > y) ? x : y;
-}
-
-static double
-min (double x, double y)
-{
-  return (x < y) ? x : y;
-}
-*/
 static double
 ternary_fcn (int conditional, double if_value, double else_value)
 {
@@ -50,38 +30,6 @@ ternary_fcn (int conditional, double if_value, double else_value)
 }
 
 
-double drand()
-{
-  /* uniform random number generator, interval -1 .. +1 */
-   return ( 2.0*((double) (RAND_MAX-abs(Rand_Call())) / (double)RAND_MAX-0.5));
-}
-
-
-/***  gauss  ***/
-
- double gauss()
-{
-  static bool gliset = TRUE;
-  static double glgset = 0.0;
-  double fac,r,v1,v2;
-  if (gliset) {
-    do {
-      v1 = drand();  v2 = drand();
-      r = v1*v1 + v2*v2;
-    } while (r >= 1.0);
-    fac = sqrt(-2.0 * log(r) / r);
-    glgset = v1 * fac;
-    gliset = FALSE;
-    return v2 * fac;
-  } else {
-    gliset = TRUE;
-    return glgset;
-  }
-}
-
-
-
-
 static double
 agauss (double nominal_val, double variation, double sigma)
 {

src/include/ngspice.h

@@ -153,6 +153,9 @@ struct timeb timebegin;
 #ifndef HAVE_RANDOM
 #define srandom(a) srand(a)
 #define random rand
+#define RR_MAX RAND_MAX
+#else
+#define RR_MAX LONG_MAX
 #endif
 
 #ifdef HAVE_INDEX

src/maths/cmaths/cmath2.c

@@ -30,6 +30,8 @@ extern long int random (void);
 extern void srandom (unsigned int seed);
 #endif
 
+extern void checkseed(); /* seed random or set by 'set rndseed=value'*/
+
 static double *
 d_tan(double *dd, int length)
 {
@@ -209,6 +211,7 @@ void *
 cx_rnd(void *data, short int type, int length, int *newlength, short int *newtype, ...)
 {
     *newlength = length;
+    checkseed();
     if (type == VF_COMPLEX) {
       complex *c;
       complex *cc = (complex *) data;
@@ -218,7 +221,6 @@ cx_rnd(void *data, short int type, int length, int *newlength, short int *newtyp
       *newtype = VF_COMPLEX;
       for (i = 0; i < length; i++) {
         int j, k;
-
         j = (int)floor(realpart(&cc[i]));
         k = (int)floor(imagpart(&cc[i]));
         realpart(&c[i]) = j ? random() % j : 0;

src/maths/misc/Makefile.am

@@ -13,7 +13,8 @@ libmathmisc_la_SOURCES = \
 	logb.c		\
 	scalb.c		\
 	norm.h		\
-	norm.c		 
+	norm.c		\
+	randnumb.c 
 
 AM_CPPFLAGS = -I$(top_srcdir)/src/include
 

src/spinit.in

@@ -1,7 +1,9 @@
-* Standard spice and nutmeg init file
+* Standard ngspice init file
 alias exit quit
 alias acct rusage all
 set x11lineararcs
+*set rndseed=12
+*set filetype=ascii
 
 *unset brief
 
@@ -11,7 +13,7 @@ if $__flag = 0
 *set numparams
 
 * For SPICE2 POLYs, edit the below line to point to the location 
-* of your codemode.
+* of your codemodel.
 @XSPICEINIT@ codemodel @prefix@/lib/spice/spice2poly.cm
 
 * The other codemodels

visualc/vngspice.vcproj

@@ -48,7 +48,7 @@
 				RuntimeTypeInfo="false"
 				UsePrecompiledHeader="0"
 				WarningLevel="3"
-				Detect64BitPortabilityProblems="true"
+				Detect64BitPortabilityProblems="false"
 				DebugInformationFormat="4"
 				CompileAs="1"
 			/>
@@ -1100,11 +1100,11 @@
 				>
 			</File>
 			<File
-				RelativePath="..\src\frontend\plotting\grid.h"
+				RelativePath="..\src\include\grid.h"
 				>
 			</File>
 			<File
-				RelativePath="..\src\include\grid.h"
+				RelativePath="..\src\frontend\plotting\grid.h"
 				>
 			</File>
 			<File
@@ -7191,6 +7191,10 @@
 				RelativePath="..\src\frontend\quote.c"
 				>
 			</File>
+			<File
+				RelativePath="..\src\maths\misc\randnumb.c"
+				>
+			</File>
 			<File
 				RelativePath="..\src\frontend\rawfile.c"
 				>