examples/Basics/ExtensionPattern/src_original_v2/NumberStoreOriginalImplementation_v2.cpp

00001 /*
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00003 
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00015 
00016 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
00017 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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00019 DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
00020 FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
00021 DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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00023 CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
00024 OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
00025 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00026 
00027 Description:
00028 CPP file demonstrating Extension DLL pattern
00029 This file contains the original implementation of the CNumberStore function.
00030 This file has _not_ been modified in order to add public extension functions.
00031 The only extension is to add the private "DoMultiplyNumbers" function which is
00032 deliberately "private" to stop code calling it.  It must be called through the 
00033 public "MultiplyNumbers" function which is available in the extension dll.  
00034 */
00035 
00036 
00037 
00038 #include <NumberStore.h>
00039 
00040         
00041 //This constant is defined in the CPP to demonstrate an intrusive change; 
00042 //DoMultiplyNumbers must be implemented in this DLL in order to see this const  
00043 const TInt KMagicMultiplyer=2;
00044 
00045 //Function implementations of all _original_ functions
00046 
00047 EXPORT_C CNumberStore::CNumberStore ()
00048         {
00049         }
00050 
00051 EXPORT_C CNumberStore::CNumberStore (TInt aNumber1, TInt aNumber2)
00052         {
00053         SetNumber1(aNumber1);
00054         SetNumber2(aNumber2);
00055         }
00056 
00057 EXPORT_C void CNumberStore::SetNumber1 (TInt aNumber1)
00058         {
00059         iNumber1=aNumber1;
00060         }
00061 
00062 EXPORT_C void CNumberStore::SetNumber2 (TInt aNumber2)
00063         {
00064         iNumber2=aNumber2;
00065         }
00066 
00067 EXPORT_C TInt CNumberStore::Number1 () const
00068         {
00069         return iNumber1;
00070         }
00071 
00072 EXPORT_C TInt CNumberStore::Number2 () const
00073         {
00074         return iNumber2;
00075         }
00076 
00077 // Five new functions added in version 2 of the DLL
00078 // Each of these set to panic to demonstrate if any legacy code calls them inadvertently
00079 EXPORT_C void NewOwnerFunction1()
00080         {
00081         User::Panic(_L("New Function Called"),1);
00082         }
00083         
00084 EXPORT_C void NewOwnerFunction2()
00085         {
00086         User::Panic(_L("New Function Called"),2);
00087         }
00088         
00089 EXPORT_C void NewOwnerFunction3()
00090         {
00091         User::Panic(_L("New Function Called"),3);
00092         }
00093         
00094 EXPORT_C void NewOwnerFunction4()
00095         {
00096         User::Panic(_L("New Function Called"),4);
00097         }
00098         
00099 EXPORT_C void NewOwnerFunction5()
00100         {
00101         User::Panic(_L("New Function Called"),5);
00102         }
00103         
00104 //Function implementations of private functions which are only used by the extension dll
00105 //Note that this function occurs at a different ordinal position in the lib / def file due
00106 //to the addition of the 5 new functions above
00107 //This function must be defined in this file so it can see KMagicMultiplyer.
00108 EXPORT_C TInt CNumberStore::DoMultiplyNumbers() const
00109         {
00110         return (iNumber1*iNumber2*KMagicMultiplyer);
00111         }

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