X-Git-Url: https://pd.if.org/git/?a=blobdiff_plain;f=functions%2Fstdlib%2Frand.c;h=40d782448421c4e1201fe31b7dd97aff3c16d94c;hb=393020b6e48719d27699dea6b29e53025bbd5123;hp=abe58f6fd9e2bf17ccd5adccfce5326d8138f1a7;hpb=1d9d92ba957a0b8307c9a65c35867fde68e6533b;p=pdclib

diff --git a/functions/stdlib/rand.c b/functions/stdlib/rand.c
index abe58f6..40d7824 100644
--- a/functions/stdlib/rand.c
+++ b/functions/stdlib/rand.c
@@ -1,28 +1,35 @@
-/* ----------------------------------------------------------------------------
- * $Id$
- * ----------------------------------------------------------------------------
- * 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 */ };
+/* rand( void )
 
-/* PDPC code - unreviewed
-static unsigned long myseed = 1;
+   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>
 
-void srand(unsigned int seed)
+#ifndef REGTEST
+
+int rand( void )
 {
-    myseed = seed;
-    return;
+    _PDCLIB_seed = _PDCLIB_seed * 1103515245 + 12345;
+    return (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