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mirror of https://github.com/FirebirdSQL/firebird.git synced 2025-01-22 18:43:02 +01:00
This commit is contained in:
Dmitry Yemanov 2020-04-16 08:51:33 +03:00
parent 2231e6e187
commit 0cc87ef415
7 changed files with 0 additions and 129 deletions

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<ClInclude Include="..\..\..\src\common\classes\TempFile.h" />
<ClInclude Include="..\..\..\src\common\classes\timestamp.h" />
<ClInclude Include="..\..\..\src\common\classes\tree.h" />
<ClInclude Include="..\..\..\src\common\classes\TriState.h" />
<ClInclude Include="..\..\..\src\common\classes\UserBlob.h" />
<ClInclude Include="..\..\..\src\common\classes\VaryStr.h" />
<ClInclude Include="..\..\..\src\common\classes\vector.h" />

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<ClInclude Include="..\..\..\src\common\classes\tree.h">
<Filter>headers</Filter>
</ClInclude>
<ClInclude Include="..\..\..\src\common\classes\TriState.h">
<Filter>headers</Filter>
</ClInclude>
<ClInclude Include="..\..\..\src\common\classes\UserBlob.h">
<Filter>headers</Filter>
</ClInclude>

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<ClInclude Include="..\..\..\src\common\classes\TempFile.h" />
<ClInclude Include="..\..\..\src\common\classes\timestamp.h" />
<ClInclude Include="..\..\..\src\common\classes\tree.h" />
<ClInclude Include="..\..\..\src\common\classes\TriState.h" />
<ClInclude Include="..\..\..\src\common\classes\UserBlob.h" />
<ClInclude Include="..\..\..\src\common\classes\VaryStr.h" />
<ClInclude Include="..\..\..\src\common\classes\vector.h" />

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<ClInclude Include="..\..\..\src\common\classes\tree.h">
<Filter>headers</Filter>
</ClInclude>
<ClInclude Include="..\..\..\src\common\classes\TriState.h">
<Filter>headers</Filter>
</ClInclude>
<ClInclude Include="..\..\..\src\common\classes\UserBlob.h">
<Filter>headers</Filter>
</ClInclude>

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<ClInclude Include="..\..\..\src\common\classes\TempFile.h" />
<ClInclude Include="..\..\..\src\common\classes\timestamp.h" />
<ClInclude Include="..\..\..\src\common\classes\tree.h" />
<ClInclude Include="..\..\..\src\common\classes\TriState.h" />
<ClInclude Include="..\..\..\src\common\classes\UserBlob.h" />
<ClInclude Include="..\..\..\src\common\classes\VaryStr.h" />
<ClInclude Include="..\..\..\src\common\classes\vector.h" />

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<ClInclude Include="..\..\..\src\common\classes\tree.h">
<Filter>headers</Filter>
</ClInclude>
<ClInclude Include="..\..\..\src\common\classes\TriState.h">
<Filter>headers</Filter>
</ClInclude>
<ClInclude Include="..\..\..\src\common\classes\UserBlob.h">
<Filter>headers</Filter>
</ClInclude>

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/*
* PROGRAM: Firebird aux classes.
* MODULE: TriState.h
* DESCRIPTION: Firebird's SQL tri-state emulation class.
*
* The contents of this file are subject to the Initial
* Developer's Public License Version 1.0 (the "License");
* you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
* http://www.ibphoenix.com/main.nfs?a=ibphoenix&page=ibp_idpl.
*
* Software distributed under the License is distributed AS IS,
* WITHOUT WARRANTY OF ANY KIND, either express or implied.
* See the License for the specific language governing rights
* and limitations under the License.
*
* The Original Code was created by Claudio Valderrama on 28-Aug-2007
* for the Firebird Open Source RDBMS project.
*
* Copyright (c) 2007 Claudio Valderrama
* and all contributors signed below.
*
* All Rights Reserved.
* Contributor(s): ______________________________________.
*
*
*/
#ifndef CLASSES_TRISTATE_H
#define CLASSES_TRISTATE_H
class TriState
{
public:
TriState();
explicit TriState(bool input);
void operator=(bool input);
bool asBool() const;
void reset();
bool assignOnce(bool input);
bool isUnknown() const;
bool isAssigned() const;
bool toggle();
private:
bool m_init, m_val;
};
// The var is left uninitialized.
inline TriState::TriState()
: m_init(false), m_val(false)
{
}
// The var is initialized to the explicit value.
inline TriState::TriState(bool input)
: m_init(true), m_val(input)
{
}
// The var receives a T/F value.
inline void TriState::operator=(bool input)
{
m_init = true;
m_val = input;
}
// The var is coerced to a T/F value as result.
inline bool TriState::asBool() const
{
return m_init && m_val;
}
// The var is returned to its uninitialized state.
inline void TriState::reset()
{
m_init = m_val = false;
}
// The assignment succeeds only if the var is uninitialized.
inline bool TriState::assignOnce(bool input)
{
if (m_init)
return false;
m_init = true;
m_val = input;
return true;
}
// Tests whether the var is uninitialized.
inline bool TriState::isUnknown() const
{
return !m_init;
}
// Tests whether the var is initialized.
inline bool TriState::isAssigned() const
{
return m_init;
}
// The var is toggled between T and F only if it's already initialized.
inline bool TriState::toggle()
{
if (!m_init)
return false;
m_val = !m_val;
return true;
}
#endif // CLASSES_TRISTATE_H