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Added locally_change_current_dir
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@ -14,5 +14,7 @@
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#include "misc_api/posix.h"
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#endif
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#include "misc_api/misc_api_shared.h"
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#endif // DLIB_MISC_APi_
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@ -59,6 +59,41 @@ namespace dlib
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to change the current working directory.
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!*/
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// ----------------------------------------------------------------------------------------
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class locally_change_current_dir : noncopyable
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{
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/*!
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WHAT THIS OBJECT REPRESENTS
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This object is a RAII tool for safely switching the current directory
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to a new directory and then automatically switching back to the original
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directory upon this object's destruction.
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!*/
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public:
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explicit locally_change_current_dir (
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const std::string& new_dir
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);
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/*!
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ensures
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- calls set_current_dir(new_dir)
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- #old_dir() == The value of get_current_dir() prior to switching to new_dir.
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!*/
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const std::string& old_dir (
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) const;
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/*!
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ensures
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- returns the directory we switch back to once this object is destructed.
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!*/
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~locally_change_current_dir(
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);
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/*!
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ensures
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- calls set_current_dir(old_dir())
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!*/
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};
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// ----------------------------------------------------------------------------------------
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class dir_create_error : public error {
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45
dlib/misc_api/misc_api_shared.h
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45
dlib/misc_api/misc_api_shared.h
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@ -0,0 +1,45 @@
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// Copyright (C) 2014 Davis E. King (davis@dlib.net)
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// License: Boost Software License See LICENSE.txt for the full license.
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#ifndef DLIB_MISC_API_ShARED_H__
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#define DLIB_MISC_API_ShARED_H__
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#include <string>
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#include "../noncopyable.h"
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namespace dlib
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{
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// ----------------------------------------------------------------------------------------
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class locally_change_current_dir : noncopyable
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{
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public:
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explicit locally_change_current_dir (
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const std::string& new_dir
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)
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{
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_old_dir = get_current_dir();
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set_current_dir(new_dir);
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}
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~locally_change_current_dir()
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{
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set_current_dir(_old_dir);
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}
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const std::string& old_dir (
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) const
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{
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return _old_dir;
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}
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private:
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std::string _old_dir;
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};
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// ----------------------------------------------------------------------------------------
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}
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#endif // DLIB_MISC_API_ShARED_H__
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