X-Git-Url: https://pd.if.org/git/?a=blobdiff_plain;f=functions%2Fstdlib%2Fdiv.c;h=5d502c8df69b88cc7a1edb101252dc770ad018fe;hb=d865c4403fc91d1f1ac95ba76febcee9f429bb97;hp=34af22323cf11e265ad1e4a9a15a89639d8188b6;hpb=1d9d92ba957a0b8307c9a65c35867fde68e6533b;p=pdclib

diff --git a/functions/stdlib/div.c b/functions/stdlib/div.c
index 34af223..5d502c8 100644
--- a/functions/stdlib/div.c
+++ b/functions/stdlib/div.c
@@ -1,10 +1,40 @@
-/* ----------------------------------------------------------------------------
- * $Id$
- * ----------------------------------------------------------------------------
- * Public Domain C Library - http://pdclib.sourceforge.net
- * This code is Public Domain. Use, modify, and redistribute at will.
- * --------------------------------------------------------------------------*/
-
-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( int, int )
+
+   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
+
+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