Initial checkin.

[pdclib.old] / functions / stdlib / abs.c

diff --git a/functions/stdlib/abs.c b/functions/stdlib/abs.c
new file mode 100644 (file)
index 0000000..1bd965d
--- /dev/null
+++ b/functions/stdlib/abs.c
@@ -0,0 +1,35 @@
+/* $Id$ */
+
+/* Release $Name$ */
+
+/* abs( 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
+
+int abs( int j )
+{
+    return ( j >= 0 ) ? j : -j;
+}
+
+#endif
+
+#ifdef TEST
+#include <_PDCLIB_test.h>
+#include <limits.h>
+
+int main()
+{
+    BEGIN_TESTS;
+    TESTCASE( abs( 0 ) == 0 );
+    TESTCASE( abs( INT_MAX ) == INT_MAX );
+    TESTCASE( abs( INT_MIN + 1 ) == -( INT_MIN + 1 ) );
+    return TEST_RESULTS;
+}
+
+#endif