X-Git-Url: https://pd.if.org/git/?a=blobdiff_plain;f=functions%2Fstdlib%2Fdiv.c;h=b80c5c9411627ad3f353b32bc9aa643bcab40178;hb=cd6cfe0f578c4f744ddc9a342243aff6b42f8027;hp=4994d3db3513d0c518942af9deea78d57f4174b3;hpb=dcc8a8e99f69e090a03b7b868443addbc0817820;p=pdclib.old

diff --git a/functions/stdlib/div.c b/functions/stdlib/div.c
index 4994d3d..b80c5c9 100644
--- a/functions/stdlib/div.c
+++ b/functions/stdlib/div.c
@@ -1,19 +1,41 @@
-// ----------------------------------------------------------------------------
-// $Id$
-// ----------------------------------------------------------------------------
-// Public Domain C Library - http://pdclib.sourceforge.net
-// This code is Public Domain. Use, modify, and redistribute at will.
-// ----------------------------------------------------------------------------
+/* $Id$ */
 
-// ----------------------------------------------------------------------------
-// C++
+/* div( int, int )
 
-ldiv_t div( long numer, long denom ) { /* TODO */ };
-lldiv_t div( long long numer, long long denom ) { /* TODO */ };
+   This file is part of the Public Domain C Library (PDCLib).
+   Permission is granted to use, modify, and / or redistribute at will.
+*/
 
-// ----------------------------------------------------------------------------
-// Standard C
+#include <stdlib.h>
 
-div_t div( int numer, int denom ) { /* TODO */ };
-lldiv_t lldiv( long long numer, long long denom ) { /* TODO */ };
-ldiv_t ldiv( long numer, long denom ) { /* TODO */ };
+#ifndef REGTEST
+
+div_t div( int numer, int denom )
+{
+    div_t rc;
+    rc.quot = numer / denom;
+    rc.rem  = numer % denom;
+    /* TODO: pre-C99 compilers might require modulus corrections */
+    return rc;
+}
+
+#endif
+
+#ifdef TEST
+#include <_PDCLIB_test.h>
+
+int main( void )
+{
+    div_t result;
+    result = div( 5, 2 );
+    TESTCASE( result.quot == 2 && result.rem == 1 );
+    result = div( -5, 2 );
+    TESTCASE( result.quot == -2 && result.rem == -1 );
+    result = div( 5, -2 );
+    TESTCASE( result.quot == -2 && result.rem == 1 );
+    TESTCASE( sizeof( result.quot ) == sizeof( int ) );
+    TESTCASE( sizeof( result.rem )  == sizeof( int ) );
+    return TEST_RESULTS;
+}
+
+#endif