change library(random) to use O'Keefe code.

git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@80 b08c6af1-5177-4d33-ba66-4b1c6b8b522a
2001-06-11 20:20:36 +00:00
parent 96ae69e8d6
commit 90c92979c6
9 changed files with 2718 additions and 6046 deletions
--- a/library/random/random.c
+++ b/library/random/random.c
@@ -0,0 +1,88 @@
+/*************************************************************************
+*									 *
+*	 YAP Prolog 							 *
+*									 *
+*	Yap Prolog was developed at NCCUP - Universidade do Porto	 *
+*									 *
+* Copyright L.Damas, V.S.Costa and Universidade do Porto 1985-1997	 *
+*									 *
+**************************************************************************
+*									 *
+* File:		regexp.c						 *
+* Last rev:								 *
+* mods:									 *
+* comments:	regular expression interpreter                           *
+*									 *
+*************************************************************************/
+
+#include "config.h"
+#include "c_interface.h"
+#include <math.h>
+
+void PROTO(init_random, (void));
+
+static short a1 = 27314, b1 = 9213, c1 = 17773;
+
+static int
+p_random(void)
+{
+  flt fli;
+  Int t1, t2, t3;
+
+  t1 = (a1 * 171) % 30269;
+  t2 = (b1 * 172) % 30307;
+  t3 = (c1 * 170) % 30323;
+  fli = (t1/30269.0) + (t2/30307.0) + (t3/30323.0);
+  a1 = t1;
+  b1 = t2;
+  c1 = t3;
+  return(unify(ARG1, MkFloatTerm(fli-(int)(fli))));
+}
+
+static int
+p_setrand(void)
+{
+  a1 = IntOfTerm(ARG1);
+  b1 = IntOfTerm(ARG2);
+  c1 = IntOfTerm(ARG3);
+  return(TRUE);
+}
+
+static int
+p_getrand(void)
+{
+  return(unify(ARG1,MkIntTerm(a1)) &&
+	 unify(ARG2,MkIntTerm(b1)) &&
+	 unify(ARG3,MkIntTerm(c1)));
+}
+
+void
+init_random(void)
+{
+  UserCPredicate("random", p_random, 1);
+  UserCPredicate("setrand", p_setrand, 3);
+  UserCPredicate("getrand", p_getrand, 3);
+}
+
+#ifdef _WIN32
+
+#include <windows.h>
+
+int WINAPI PROTO(win_random, (HANDLE, DWORD, LPVOID));
+
+int WINAPI win_random(HANDLE hinst, DWORD reason, LPVOID reserved)
+{
+  switch (reason) 
+    {
+    case DLL_PROCESS_ATTACH:
+      break;
+    case DLL_PROCESS_DETACH:
+      break;
+    case DLL_THREAD_ATTACH:
+      break;
+    case DLL_THREAD_DETACH:
+      break;
+    }
+  return 1;
+}
+#endif