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/* Functions from hack's utils library.
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Copyright (C) 1989, 1990, 1991, 1998, 1999, 2003, 2008, 2009, 2011
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Copyright (C) 1989, 1990, 1991, 1998, 1999, 2003, 2008, 2009, 2011, 2013
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Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify