X-Git-Url: https://pd.if.org/git/?a=blobdiff_plain;f=functions%2Fstdlib%2Frand.c;h=b326be00493615731ba5ecb7ba5d62170b7af3cc;hb=12e17136786afb1775c9dc946cbe41f5e230c24a;hp=abe58f6fd9e2bf17ccd5adccfce5326d8138f1a7;hpb=c8f799d852e3698468a78954d82588e841cc0b70;p=pdclib.old

diff --git a/functions/stdlib/rand.c b/functions/stdlib/rand.c
index abe58f6..b326be0 100644
--- a/functions/stdlib/rand.c
+++ b/functions/stdlib/rand.c
@@ -1,28 +1,37 @@
-/* ----------------------------------------------------------------------------
- * $Id$
- * ----------------------------------------------------------------------------
- * 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( void )
 {
-    int ret;
-    
-    myseed = myseed * 1103515245UL + 12345;
-    ret = (int)((myseed >> 16) & 0x8fff);
-    return (ret);
+    int rnd1, rnd2;
+    TESTCASE( ( rnd1 = rand() ) < RAND_MAX );
+    TESTCASE( ( rnd2 = rand() ) < RAND_MAX );
+    srand( 1 );
+    TESTCASE( rand() == rnd1 );
+    TESTCASE( rand() == rnd2 );
+    return TEST_RESULTS;
 }
-*/
+
+#endif