57 lines
1.9 KiB
C++
57 lines
1.9 KiB
C++
// util.hxx - general-purpose utility functions.
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// Copyright (C) 2002 Curtis L. Olson - http://www.flightgear.org/~curt
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License as
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// published by the Free Software Foundation; either version 2 of the
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// License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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//
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// $Id$
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#ifndef __UTIL_HXX
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#define __UTIL_HXX 1
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#include <string>
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#include <simgear/misc/sg_path.hxx>
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/**
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* Move a value towards a target.
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*
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* This function was originally written by Alex Perry.
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*
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* @param current The current value.
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* @param target The target value.
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* @param timeratio The percentage of smoothing time that has passed
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* (elapsed time/smoothing time)
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* @return The new value.
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*/
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double fgGetLowPass (double current, double target, double timeratio);
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/**
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* File access control, used by Nasal and fgcommands.
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* @param path Path to be validated
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* @param write True for write operations and false for read operations.
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* @return The validated path on success or empty if access denied.
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*
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* Warning: because this always (not just on Windows) treats both \ and /
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* as path separators, and accepts relative paths (check-to-use race if
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* the current directory changes),
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* always use the returned path not the original one
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*/
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SGPath fgValidatePath(const SGPath& path, bool write);
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/**
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* Set allowed paths for fgValidatePath
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*/
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void fgInitAllowedPaths();
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#endif // __UTIL_HXX
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