Initial checkin.

[pdclib] / functions / stdlib / labs.c

diff --git a/functions/stdlib/labs.c b/functions/stdlib/labs.c
new file mode 100644 (file)
index 0000000..09d15a6
--- /dev/null
+++ b/functions/stdlib/labs.c
@@ -0,0 +1,35 @@
+/* $Id$ */
+
+/* Release $Name$ */
+
+/* labs( long 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
+
+long int labs( long int j )
+{
+    return ( j >= 0 ) ? j : -j;
+}
+
+#endif
+
+#ifdef TEST
+#include <_PDCLIB_test.h>
+#include <limits.h>
+
+int main()
+{
+    BEGIN_TESTS;
+    TESTCASE( labs( 0 ) == 0 );
+    TESTCASE( labs( LONG_MAX ) == LONG_MAX );
+    TESTCASE( labs( LONG_MIN + 1 ) == -( LONG_MIN + 1 ) );
+    return TEST_RESULTS;
+}
+
+#endif