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Open Source Computer Vision Library
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115 lines
4.4 KiB
115 lines
4.4 KiB
/////////////////////////////////////////////////////////////////////////// |
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// |
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// Copyright (c) 2012, Industrial Light & Magic, a division of Lucas |
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// Digital Ltd. LLC |
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// |
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// All rights reserved. |
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// |
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// Redistribution and use in source and binary forms, with or without |
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// modification, are permitted provided that the following conditions are |
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// met: |
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// * Redistributions of source code must retain the above copyright |
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// notice, this list of conditions and the following disclaimer. |
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// * Redistributions in binary form must reproduce the above |
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// copyright notice, this list of conditions and the following disclaimer |
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// in the documentation and/or other materials provided with the |
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// distribution. |
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// * Neither the name of Industrial Light & Magic nor the names of |
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// its contributors may be used to endorse or promote products derived |
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// from this software without specific prior written permission. |
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// |
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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// |
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/////////////////////////////////////////////////////////////////////////// |
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#ifndef INCLUDED_IMATHNAMESPACE_H |
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#define INCLUDED_IMATHNAMESPACE_H |
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// |
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// The purpose of this file is to make it possible to specify an |
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// IMATH_INTERNAL_NAMESPACE as a preprocessor definition and have all of the |
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// Imath symbols defined within that namespace rather than the standard |
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// Imath namespace. Those symbols are made available to client code through |
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// the IMATH_NAMESPACE in addition to the IMATH_INTERNAL_NAMESPACE. |
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// |
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// To ensure source code compatibility, the IMATH_NAMESPACE defaults to Imath |
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// and then "using namespace IMATH_INTERNAL_NAMESPACE;" brings all of the |
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// declarations from the IMATH_INTERNAL_NAMESPACE into the IMATH_NAMESPACE. |
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// This means that client code can continue to use syntax like Imath::V3f, |
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// but at link time it will resolve to a mangled symbol based on the |
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// IMATH_INTERNAL_NAMESPACE. |
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// |
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// As an example, if one needed to build against a newer version of Imath and |
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// have it run alongside an older version in the same application, it is now |
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// possible to use an internal namespace to prevent collisions between the |
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// older versions of Imath symbols and the newer ones. To do this, the |
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// following could be defined at build time: |
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// |
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// IMATH_INTERNAL_NAMESPACE = Imath_v2 |
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// |
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// This means that declarations inside Imath headers look like this (after |
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// the preprocessor has done its work): |
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// |
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// namespace Imath_v2 { |
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// ... |
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// class declarations |
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// ... |
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// } |
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// |
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// namespace Imath { |
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// using namespace Imath_v2; |
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// } |
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// |
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// |
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// Open Source version of this file pulls in the IlmBaseConfig.h file |
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// for the configure time options. |
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// |
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#include "IlmBaseConfig.h" |
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#ifndef IMATH_NAMESPACE |
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#define IMATH_NAMESPACE Imath |
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#endif |
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#ifndef IMATH_INTERNAL_NAMESPACE |
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#define IMATH_INTERNAL_NAMESPACE IMATH_NAMESPACE |
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#endif |
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// |
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// We need to be sure that we import the internal namespace into the public one. |
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// To do this, we use the small bit of code below which initially defines |
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// IMATH_INTERNAL_NAMESPACE (so it can be referenced) and then defines |
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// IMATH_NAMESPACE and pulls the internal symbols into the public |
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// namespace. |
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// |
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namespace IMATH_INTERNAL_NAMESPACE {} |
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namespace IMATH_NAMESPACE { |
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using namespace IMATH_INTERNAL_NAMESPACE; |
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} |
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// |
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// There are identical pairs of HEADER/SOURCE ENTER/EXIT macros so that |
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// future extension to the namespace mechanism is possible without changing |
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// project source code. |
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// |
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#define IMATH_INTERNAL_NAMESPACE_HEADER_ENTER namespace IMATH_INTERNAL_NAMESPACE { |
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#define IMATH_INTERNAL_NAMESPACE_HEADER_EXIT } |
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#define IMATH_INTERNAL_NAMESPACE_SOURCE_ENTER namespace IMATH_INTERNAL_NAMESPACE { |
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#define IMATH_INTERNAL_NAMESPACE_SOURCE_EXIT } |
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#endif /* INCLUDED_IMATHNAMESPACE_H */
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