X-Git-Url: https://pd.if.org/git/?a=blobdiff_plain;f=functions%2Fstdlib%2Fdiv.c;h=f1523fc99b5dda62db2c8afd9e9e01c622680aa2;hb=b1fc26afebd4d557ff89a44bc21767a8704c3809;hp=4994d3db3513d0c518942af9deea78d57f4174b3;hpb=34893ecc2200dc7017c36a54cb6c5f4c2378b5ec;p=pdclib

diff --git a/functions/stdlib/div.c b/functions/stdlib/div.c
index 4994d3d..f1523fc 100644
--- a/functions/stdlib/div.c
+++ b/functions/stdlib/div.c
@@ -1,19 +1,39 @@
-// ----------------------------------------------------------------------------
-// $Id$
-// ----------------------------------------------------------------------------
-// Public Domain C Library - http://pdclib.sourceforge.net
-// This code is Public Domain. Use, modify, and redistribute at will.
-// ----------------------------------------------------------------------------
+/* div( int, int )
 
-// ----------------------------------------------------------------------------
-// C++
+   This file is part of the Public Domain C Library (PDCLib).
+   Permission is granted to use, modify, and / or redistribute at will.
+*/
 
-ldiv_t div( long numer, long denom ) { /* TODO */ };
-lldiv_t div( long long numer, long long denom ) { /* TODO */ };
+#include <stdlib.h>
 
-// ----------------------------------------------------------------------------
-// Standard C
+#ifndef REGTEST
 
-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 */ };
+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