55 lines
2.0 KiB
C
55 lines
2.0 KiB
C
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/*
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* Copyright (c) 2001, 2008, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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// Definitions of our util functions
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void *must_malloc(size_t size);
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// overflow management
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#define OVERFLOW ((size_t) - 1)
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#define PSIZE_MAX (OVERFLOW / 2) /* normal size limit */
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inline size_t scale_size(size_t size, size_t scale)
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{
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return (size > PSIZE_MAX / scale) ? OVERFLOW : size * scale;
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}
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inline size_t add_size(size_t size1, size_t size2)
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{
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return ((size1 | size2 | (size1 + size2)) > PSIZE_MAX) ? OVERFLOW : size1 + size2;
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}
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inline size_t add_size(size_t size1, size_t size2, int size3)
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{
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return add_size(add_size(size1, size2), size3);
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}
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// These may be expensive, because they have to go via Java TSD,
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// if the optional u argument is missing.
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struct unpacker;
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extern void unpack_abort(const char *msg, unpacker *u = nullptr);
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extern bool unpack_aborting(unpacker *u = nullptr);
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