////////////////////////////////////////////////////////////////////////////////
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// This source file is part of the ZipArchive library source distribution and
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// is Copyrighted 2000 - 2011 by Artpol Software - Tadeusz Dracz
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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
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// as published by the Free Software Foundation; either version 2
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// of the License, or (at your option) any later version.
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//
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// For the licensing details refer to the License.txt file.
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//
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// Web Site: http://www.artpol-software.com
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////////////////////////////////////////////////////////////////////////////////
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/**
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* \file BitFlag.h
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* Includes the ZipArchiveLib::CBitFlag class.
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*/
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#if !defined(ZIPARCHIVE_BITFLAG_DOT_H)
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#define ZIPARCHIVE_BITFLAG_DOT_H
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#if _MSC_VER > 1000
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#pragma once
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#endif
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namespace ZipArchiveLib
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{
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/**
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Provides functionality for bit operations on an integer value.
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*/
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struct ZIP_API CBitFlag
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{
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public:
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/**
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The current value.
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*/
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int m_value;
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/**
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Initializes a new instance of the CBitFlag class.
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*/
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CBitFlag()
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:m_value(0)
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{
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}
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/**
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Initializes a new instance of the CBitFlag class.
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\param value
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The initial value.
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*/
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CBitFlag(int value)
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:m_value(value)
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{
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}
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/**
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Sets the given flags.
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\param flags
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The flags to set.
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*/
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void Set(int flags)
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{
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m_value |= flags;
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}
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/**
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Clears the given flags.
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\param flags
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The flags to clear.
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*/
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void Clear(int flags)
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{
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m_value &= ~flags;
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}
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/**
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Returns the value indicating whether any of the given flags is set.
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\param flags
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The flags to examine.
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\return
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\c true, if any of the given flags is set; \c false otherwise.
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*/
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bool IsSetAny(int flags) const
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{
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return (m_value & flags) != 0;
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}
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/**
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Returns the value indicating whether all of the given flags are set.
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\param flags
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The flags to examine.
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\return
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\c true, if all of the given flags are set; \c false otherwise.
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*/
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bool IsSetAll(int flags) const
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{
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return (m_value & flags) == flags;
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}
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/**
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Sets the given flags and examines if this caused a modification to the current object.
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\param flags
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The flags to set.
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\return
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\c true, if the operation caused modification; \c false otherwise.
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*/
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bool SetWithCheck(int flags)
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{
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if (!IsSetAll(flags))
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{
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Set(flags);
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return true;
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}
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else
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return false;
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}
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/**
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Clears the given flags and examines if this caused a modification to the current object.
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\param flags
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The flags to clear.
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\return
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\c true, if the operation caused modification; \c false otherwise.
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*/
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bool ClearWithCheck(int flags)
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{
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if (IsSetAny(flags))
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{
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Clear(flags);
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return true;
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}
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else
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return false;
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}
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/**
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Changes the given flags and examines if this caused a modification to the current object.
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\param flags
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The flags to change.
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\param set
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If \c true, the flags will be set; otherwise the flags will be cleared.
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\return
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\c true, if the operation caused a modification; \c false otherwise.
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*/
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bool ChangeWithCheck(int flags, bool set)
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{
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return set ? SetWithCheck(flags) : ClearWithCheck(flags);
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}
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/**
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Changes the given flags.
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\param flags
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The flags to change.
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\param set
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If \c true, the flags will be set; otherwise the flags will be cleared.
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*/
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void Change(int flags, bool set)
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{
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set ? Set(flags) : Clear(flags);
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}
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/**
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Returns the current value.
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*/
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operator int() const
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{
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return m_value;
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}
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CBitFlag& operator = (const CBitFlag& flag)
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{
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m_value = flag.m_value;
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return *this;
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}
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bool operator == (int value)
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{
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return m_value == value;
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}
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bool operator == (const CBitFlag& flag)
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{
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return m_value == flag.m_value;
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}
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};
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}
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#endif
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