X-Git-Url: https://pd.if.org/git/?a=blobdiff_plain;f=functions%2Fstdlib%2Fdiv.c;h=2c6bbb5d6b534337a99b72db8979cf38dd1d272b;hb=d9dcf16664c81809258992e1653ecb68c8079974;hp=34af22323cf11e265ad1e4a9a15a89639d8188b6;hpb=c8f799d852e3698468a78954d82588e841cc0b70;p=pdclib.old

diff --git a/functions/stdlib/div.c b/functions/stdlib/div.c
index 34af223..2c6bbb5 100644
--- a/functions/stdlib/div.c
+++ b/functions/stdlib/div.c
@@ -1,10 +1,45 @@
-/* ----------------------------------------------------------------------------
- * $Id$
- * ----------------------------------------------------------------------------
- * 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 */ };
+/* $Id$ */
+
+/* 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>
+
+#ifndef _PDCLIB_CONFIG_H
+#include <_PDCLIB_config.h>
+#endif
+
+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 ) == _PDCLIB_INT_BYTES );
+    TESTCASE( sizeof( result.rem )  == _PDCLIB_INT_BYTES );
+    return TEST_RESULTS;
+}
+
+#endif