Symbian OS 软件开发——应用C++开发智能手机应用程序入门

// Chapter 6 Examples // // Copyright (c) Symbian Software Ltd 1999 - 2007. All rights reserved. // // This file contains the source for the various examples in Chapter 6. // It uses the console. Note that this example is made to run on the emulator only. #include <e32base.h> #include <e32cons.h> CConsoleBase* console; /*---------------------------------------------------------------------------- Stub example from console section. -----------------------------------------------------------------------------*/ void PressAnyKey() { _LIT(KAnyKey,"[Press any key]\n"); console->Printf(KAnyKey); console->Getch(); } /*------------------------------------------------------------------------ From example comparing string handling in C and Symbian OS. -------------------------------------------------------------------------*/ _LIT(KNamePrefix,"Name: "); void makeName(const TDesC& aName) { TBuf<80> str; str.Copy(KNamePrefix); str.Append(aName); _LIT(KFormatStr,"str = %S\n"); console->Printf(KFormatStr,&str); } void MainFunc() { _LIT(KFunctionStr,"---MainFunc()---"); console->Printf(KFunctionStr); makeName(_L("Sharon")); // Note that this demonstrates _L, but _LIT should be used instead PressAnyKey(); } /*------------------------------------------------------------------------------- Example from heap descriptor section --------------------------------------------------------------------------------*/ void heapDesExampleL() { _LIT(KFunctionStr,"---heapDesExampleL()---"); console->Printf(KFunctionStr); _LIT(KString1,"Test"); _LIT(KString2,"My Heap String"); HBufC* myHeapDes = HBufC::NewL(KString1().Length()); CleanupStack::PushL(myHeapDes); *myHeapDes = KString1; _LIT(KFormat1,"myHeapDes = \"%S\" length = %d\n"); console->Printf(KFormat1,myHeapDes,myHeapDes->Length()); myHeapDes->ReAllocL(KString2().Length()); // if you do not do this, // next line would panic /* Replace entire string in the HBufC */ *myHeapDes = KString2; console->Printf(KFormat1,myHeapDes,myHeapDes->Length()); /* Get a modifiable pointer to the HBufC's data buffer */ TPtr myPtr = myHeapDes->Des(); _LIT(KString3,"Hello"); _LIT(KString4,"!!!"); /* Modify the HBufC buffer area through the TPtr, using Copy() * and Append() */ myPtr.Copy(KString3); myPtr.Append(KString4); _LIT(KFormat2,"myHeapDes = \"%S\" length = %d myPtr = \"%S\" length = %d\n"); console->Printf(KFormat2,myHeapDes,myHeapDes->Length(), &myPtr,myPtr.Length()); CleanupStack::PopAndDestroy(myHeapDes); PressAnyKey(); } /*------------------------------------------------------------------------- Examples from 'Touring the Descriptor Methods' section. --------------------------------------------------------------------------*/ void CompareExample() { _LIT(KFunctionStr,"---CompareExample()---"); console->Printf(KFunctionStr); _LIT(KString1,"My String"); _LIT(KString2,"MY STRING"); _LIT(KString3,"Another string"); TBuf<20> str1(KString1); TBuf<20> str2(KString2); TInt res; /* Compare shows a match since str1 is initialized to KString1 */ res = str1.Compare(KString1); _LIT(KFormatCompare1,"Compare() string 1 and string 1 = %d\n"); console->Printf(KFormatCompare1, res); /* Compare shows a no match since str1 and str2 contents do * not exactly match */ res = str1.Compare(str2); _LIT(KFormatCompare2,"Compare() string 1 and string 2 = %d\n"); console->Printf(KFormatCompare2, res); /* Compare shows a match since a folded compare is case insensitive */ res = str1.CompareF(str2); _LIT(KFormatCompare3,"CompareF() string 1 and string 2 = %d\n"); console->Printf(KFormatCompare3, res); /* Compare shows a mismatch since string 1 and 3 are different */ res = str1.Compare(KString3); _LIT(KFormatCompare4,"Compare() string 1 and string 3 = %d\n"); console->Printf(KFormatCompare4, res); PressAnyKey(); } void FindExample() { _LIT(KFunctionStr,"---FindExample()---"); console->Printf(KFunctionStr); _LIT(KString1,"This is a test string"); _LIT(KString2,"test"); _LIT(KString3,"car"); _LIT(KString4,"TEST"); TBuf<40> buf(KString1); TInt res; /* Find returns position of "test" in KString1 */ res = buf.Find(KString2); _LIT(KFormat1,"Find of string 2 in string 1 res = %d\n"); console->Printf(KFormat1,res); /* "car" does not occur in KString1, so KErrNotFound reported */ res = buf.Find(KString3); _LIT(KFormat2,"Find of string 3 in string 1 res = %d\n"); console->Printf(KFormat2,res); /* Since FindF does a fold compare, "TEST" is found and position * is returned */ res = buf.FindF(KString4); _LIT(KFormat3,"Find of string 4 in string 1 res = %d\n"); console->Printf(KFormat3,res); PressAnyKey(); } void MatchExample() { _LIT(KFunctionStr,"---MatchExample()---"); console->Printf(KFunctionStr); _LIT(KString1,"This is test string A"); _LIT(KString2,"This is test string ?"); _LIT(KString3,"*is test string ?"); _LIT(KString4,"*"); _LIT(KString5,"*B"); TBuf<40> buf(KString1); TInt res; /* A match since ? indicates any single character */ res = buf.Match(KString2); _LIT(KFormat1,"Match: string 2 and string 1 res = %d\n"); console->Printf(KFormat1,res); /* A match using '*' and '?' in string */ res = buf.Match(KString3); _LIT(KFormat2,"Match: string 3 and string 1 res = %d\n"); console->Printf(KFormat2,res); /* '*' matches any string */ res = buf.Match(KString4); _LIT(KFormat3,"Match: string 4 and string 1 res = %d\n"); console->Printf(KFormat3,res); /* no match since KString1 does not end in 'B' */ res = buf.Match(KString5); _LIT(KFormat4,"Match: string 5 and string 1 res = %d\n"); console->Printf(KFormat4,res); PressAnyKey(); } void SubstringExample() { _LIT(KFunctionStr,"---SubstringExample()---"); console->Printf(KFunctionStr); _LIT(KString1,"This is my string"); TBufC<40> buff(KString1); TPtrC SubStr= buff.Left(4); /* Get left 4 characters of string */ _LIT(KFormat1,"Left(4): SubStr = \"%S\"\n"); console->Printf(KFormat1,&SubStr); /* Get right 3 characters of string */ SubStr.Set(buff.Right(3)); _LIT(KFormat2,"Right(3): SubStr = \"%S\"\n"); console->Printf(KFormat2,&SubStr); /* get 6 characters in middle, starting at position 8 */ SubStr.Set(buff.Mid(8,6)); _LIT(KFormat3,"Mid(8,6): SubStr = \"%S\"\n"); console->Printf(KFormat3,&SubStr); PressAnyKey(); } void CopyExample() { _LIT(KFunctionStr,"---CopyExample()---"); console->Printf(KFunctionStr); TUint8 binData[6] = {0xB0,0xB1,0xB2,0xB3,0xB4,0xB5}; /* Copy standard C array into binary descriptor */ TBuf8<sizeof(binData)> binDes; binDes.Copy(binData,sizeof(binData)); _LIT(KFormat1,"binDes[0]=%x binDes[1]=%x\n"); console->Printf(KFormat1,binDes[0],binDes[1]); /* Copy binary descriptor to another 8 bit binary descriptor */ TBuf8<20> buf8; buf8.Copy(binDes); _LIT(KFormat2,"buf8[0]=%x buf8[1]=%x\n"); console->Printf(KFormat2,buf8[0],buf8[1]); /* Copy literal into descriptor */ _LIT(KString1,"My string"); TBuf<20> buf16; buf16.C