crestrictmgr.cpp

研读AxCrypt对加解密的处理方法

/*
    @(#) $Id$

    AxCrypt - Compressing and Encrypting Wrapper and Application Launcher for Secure Local,
    Server or Web Storage of Document Files.

    Copyright (C) 2004 Svante Seleborg/Axantum Software AB, All rights reserved.

    This program is free software; you can redistribute it and/or modify it under the terms
    of the GNU General Public License as published by the Free Software Foundation;
    either version 2 of the License, or (at your option) any later version.

    This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
    without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
    See the GNU General Public License for more details.

    You should have received a copy of the GNU General Public License along with this program;
    if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
    Boston, MA 02111-1307 USA

    The author may be reached at mailto:[e-mail] and http://axcrypt.sourceforge.net
----
    CRestrictMgr.cpp                     Handle and validate licenses
*/
#include "stdafx.h"
#include "CRestrictMgr.h"

#include "AxAssert.h"
#define AXLIB_ASSERT_FILE "CRestrictMgr.cpp"

/// \brief Set a restriction - empty string means remove restriction.
void
CRestrictMgr::Set(string sRestrict, const string sValue) {
    transform(sRestrict.begin(), sRestrict.end(), sRestrict.begin(), tolower);

    if (sValue.empty()) {
        if (Has(sRestrict)) {
            m_smRestrictions.erase(sRestrict);
        }
    } else {
        m_smRestrictions[sRestrict] = sValue;
    }
}

/// \brief Check if there is a restriction with that name at all
bool
CRestrictMgr::Has(string sRestrict) {
    transform(sRestrict.begin(), sRestrict.end(), sRestrict.begin(), tolower);
    return m_smRestrictions.find(sRestrict) != m_smRestrictions.end();
}

/// \brief Get the restriction as a string. Must exist.
const
string &
CRestrictMgr::GetStr(string sRestrict) {
    ASSCHK(Has(sRestrict), _T("Restriction must exist to get it!"));
    transform(sRestrict.begin(), sRestrict.end(), sRestrict.begin(), tolower);
    return m_smRestrictions[sRestrict];
}

/// \brief Get the restriction interpreted as an integer. Must exist.
int
CRestrictMgr::GetInt(string sRestrict) {
    ASSCHK(Has(sRestrict), _T("Restriction must exist to get it!"));
    transform(sRestrict.begin(), sRestrict.end(), sRestrict.begin(), tolower);
    return atoi(m_smRestrictions[sRestrict].c_str());
}