X-Git-Url: https://pd.if.org/git/?a=blobdiff_plain;f=functions%2Fstdlib%2Frand.c;h=b8163a381c145ba6779d9ae20b81a23f6579c87a;hb=e25ac2ecee6251afcec84e08165e454fb6bc256c;hp=967ae2fcff1e24b5653c15a3830198285db3658a;hpb=0a5395faab237ba9008352b0f4bee9659bbd3d5f;p=pdclib

diff --git a/functions/stdlib/rand.c b/functions/stdlib/rand.c
index 967ae2f..b8163a3 100644
--- a/functions/stdlib/rand.c
+++ b/functions/stdlib/rand.c
@@ -1,28 +1,38 @@
-// ----------------------------------------------------------------------------
-// $Id$
-// ----------------------------------------------------------------------------
-// Public Domain C Library - http://pdclib.sourceforge.net
-// This code is Public Domain. Use, modify, and redistribute at will.
-// ----------------------------------------------------------------------------
+/* $Id$ */
 
-int rand( void ) { /* TODO */ };
-void srand( unsigned int seed ) { /* TODO */ };
+/* Release $Name$ */
 
-/* PDPC code - unreviewed
-static unsigned long myseed = 1;
+/* rand( void )
 
-void srand(unsigned int seed)
+   This file is part of the Public Domain C Library (PDCLib).
+   Permission is granted to use, modify, and / or redistribute at will.
+*/
+
+#include <stdlib.h>
+
+#ifndef REGTEST
+
+int rand( void )
 {
-    myseed = seed;
-    return;
+    _PDCLIB_seed = _PDCLIB_seed * 1103515245 + 12345;
+    return (unsigned int) ( _PDCLIB_seed / 65536 ) % 32768;
 }
 
-int rand(void)
+#endif
+
+#ifdef TEST
+#include <_PDCLIB_test.h>
+
+int main()
 {
-    int ret;
-    
-    myseed = myseed * 1103515245UL + 12345;
-    ret = (int)((myseed >> 16) & 0x8fff);
-    return (ret);
+    int rnd1, rnd2;
+    BEGIN_TESTS;
+    TESTCASE( ( rnd1 = rand() ) < RAND_MAX );
+    TESTCASE( ( rnd2 = rand() ) < RAND_MAX );
+    srand( 1 );
+    TESTCASE( rand() == rnd1 );
+    TESTCASE( rand() == rnd2 );
+    return TEST_RESULTS;
 }
-*/
+
+#endif