From b6d455a02bd338e9dc0faa09d4d8177ecd8d569a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Petr=20Mr=C3=A1zek?= <peterix@gmail.com>
Date: Sun, 10 Apr 2016 15:53:05 +0200
Subject: NOISSUE reorganize and document libraries

---
 libraries/pack200/src/utils.h | 53 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 53 insertions(+)
 create mode 100644 libraries/pack200/src/utils.h

(limited to 'libraries/pack200/src/utils.h')

diff --git a/libraries/pack200/src/utils.h b/libraries/pack200/src/utils.h
new file mode 100644
index 00000000..5a3dc8f6
--- /dev/null
+++ b/libraries/pack200/src/utils.h
@@ -0,0 +1,53 @@
+/*
+ * Copyright (c) 2001, 2008, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+// Definitions of our util functions
+
+#include <stdexcept>
+
+void *must_malloc(size_t size);
+
+// overflow management
+#define OVERFLOW ((size_t) - 1)
+#define PSIZE_MAX (OVERFLOW / 2) /* normal size limit */
+
+inline size_t scale_size(size_t size, size_t scale)
+{
+	return (size > PSIZE_MAX / scale) ? OVERFLOW : size * scale;
+}
+
+inline size_t add_size(size_t size1, size_t size2)
+{
+	return ((size1 | size2 | (size1 + size2)) > PSIZE_MAX) ? OVERFLOW : size1 + size2;
+}
+
+inline size_t add_size(size_t size1, size_t size2, int size3)
+{
+	return add_size(add_size(size1, size2), size3);
+}
+
+struct unpacker;
+/// This throws an exception!
+extern void unpack_abort(const char *msg = nullptr);
-- 
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