forked from mirror/openmw-tes3mp
77 lines
1.8 KiB
C++
77 lines
1.8 KiB
C++
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#ifndef CSM_WOLRD_RECORD_H
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#define CSM_WOLRD_RECORD_H
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#include <stdexcept>
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namespace CSMWorld
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{
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template <typename ESXRecordT>
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struct Record
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{
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enum state
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{
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State_BaseOnly, // defined in base only
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State_Modified, // exists in base, but has been modified
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State_ModifiedOnly, // newly created in modified
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State_Deleted // exists in base, but has been deleted
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};
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ESXRecordT mBase;
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ESXRecordT mModified;
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state mState;
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bool isDeleted() const;
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bool isModified() const;
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const ESXRecordT& get() const;
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///< Throws an exception, if the record is deleted.
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ESXRecordT& get();
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///< Throws an exception, if the record is deleted.
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void setModified (const ESXRecordT& modified);
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};
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template <typename ESXRecordT>
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bool Record<ESXRecordT>::isDeleted() const
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{
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return mState==State_Deleted;
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}
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template <typename ESXRecordT>
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bool Record<ESXRecordT>::isModified() const
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{
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return mState==State_Modified || mState==State_ModifiedOnly;
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}
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template <typename ESXRecordT>
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const ESXRecordT& Record<ESXRecordT>::get() const
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{
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if (isDeleted())
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throw std::logic_error ("attempt to access a deleted record");
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return mState==State_BaseOnly ? mBase : mModified;
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}
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template <typename ESXRecordT>
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ESXRecordT& Record<ESXRecordT>::get()
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{
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if (isDeleted())
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throw std::logic_error ("attempt to access a deleted record");
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return mState==State_BaseOnly ? mBase : mModified;
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}
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template <typename ESXRecordT>
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void Record<ESXRecordT>::setModified (const ESXRecordT& modified)
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{
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mModified = modified;
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if (mState!=State_ModifiedOnly)
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mState = State_Modified;
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}
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}
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#endif
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