C++ (Cpp) HBufC8 Examples

Programming Language: C++ (Cpp)

Class/Type: HBufC8

Examples at hotexamples.com: 1

HBufC8 is a class in the Symbian operating system that provides buffer storage for 8-bit characters. It is part of the Symbian C++ Library.

Below are two code examples using HBufC8:

Example 1:

HBufC8* buffer = HBufC8::NewL(10);
// allocate a buffer with size 10

TPtr8 ptr = buffer->Des();
// get a descriptor for the buffer

_LIT8(KText, "Hello");
ptr.Copy(KText);
// copy the text "Hello" into the buffer

delete buffer;
// free the buffer memory

In this example, a buffer of size 10 is allocated using HBufC8::NewL(). A descriptor for the buffer is then obtained using the Des() method, and some text is copied into the buffer using the Copy() method. Finally, the memory allocated for the buffer is freed using delete.

Example 2:

RFile file;
User::LeaveIfError(file.Open(fs, _L("c:\\data\\file.txt"), EFileRead));
// open a file for reading

HBufC8* buffer = HBufC8::NewLC(1024);
TPtr8 ptr = buffer->Des();
// allocate a buffer with size 1024

User::LeaveIfError(file.Read(ptr));
// read data from the file into the buffer

TInt size = ptr.Size();
// get the size of the data read

CleanupStack::PopAndDestroy(buffer);
file.Close();
// free the buffer memory and close the file

In this example, a file is opened for reading using RFile. A buffer of size 1024 is allocated using HBufC8::NewLC(), and a descriptor for the buffer is obtained. Data from the file is then read into the buffer using the Read() method. The size of the data read is obtained using the Size() method of the descriptor. The memory allocated for the buffer is freed using CleanupStack::PopAndDestroy(), and the file is closed using Close(). The HBufC8 class is part of the Symbian C++ library package.

C++ (Cpp) HBufC8 - 1 examples found. These are the top rated real world C++ (Cpp) examples of HBufC8 extracted from open source projects. You can rate examples to help us improve the quality of examples.

Frequently Used Methods

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Des(30)

Length(30)

Ptr(30)

Compare(16)

Size(12)

ReAllocL(9)

Mid(7)

Right(5)

Find(4)

CompareF(3)

Locate(2)

AllocL(1)

FindC(1)

FindF(1)

ReAlloc(1)

Example #1

Show file

File: examplecookiemanager.cpp Project: kuailexs/symbiandump-mw2

TBool CExampleCookieManager::ValidateCookieL(CCookie& aCookie, const TUriC8& aUri)
	{
	THTTPHdrVal attributeVal;

	if(aCookie.Attribute(CCookie::EPath, attributeVal) == KErrNone)
		{
		// if the path attribute exists check it is a prefix of the path
		// of the uri that issued it (if not reject)
		RStringF cookiePath = attributeVal.StrF();
		const TDesC8& uriPath = aUri.Extract(EUriPath);
		if(uriPath.FindF(RemoveQuotes(cookiePath.DesC())) != 0)
			return EFalse;
		}
	else
		{
		// if the path attribute doesn't exist add it
		THTTPHdrVal val(iStringPool.OpenFStringL(aUri.Extract(EUriPath)));
		aCookie.SetAttributeL(CCookie::EPath, val);
		}

	if(aCookie.Attribute(CCookie::EDomain, attributeVal) == KErrNone)
		{
		const TChar dot('.');
		const TDesC8& cookieDomain = attributeVal.StrF().DesC();
		const TDesC8& uriDomain = aUri.Extract(EUriHost);

		// if the domain does not exactly match the uri and does not begin
		// with a dot then add one
		if((cookieDomain.Compare(uriDomain) != 0) &&
		   (cookieDomain.Locate(dot) != 0))
			{
			_LIT8(KAddDotString, ".%S");
			HBufC8* newDomain = HBufC8::NewLC(cookieDomain.Length() + 1);
			newDomain->Des().AppendFormat(KAddDotString(), &cookieDomain);

			RStringF domain = iStringPool.OpenFStringL(*newDomain);
			CleanupStack::PopAndDestroy(newDomain);

			THTTPHdrVal val(domain);
			aCookie.SetAttributeL(CCookie::EDomain, val);
			domain.Close();
			}

		// if the domain does not contain an embedded dot then reject it
		// ie reject .com or .com.
		// Start by removing one character from each end. ie start at pos 1 and take a length
		// which is 2 shorter than the original descriptor
		TPtrC8 domainMiddle = cookieDomain.Mid(1, cookieDomain.Length() - 2);
		if(domainMiddle.Locate(dot) == KErrNotFound)
			return EFalse;

		// Reject the cookie if the domain differs by two or more levels from the uri
		// ie if uri=www.x.y.com then accept a cookie with .x.y.com but reject .y.com
		TInt pos = uriDomain.FindF(cookieDomain);
		if(pos > 2)
			{
			const TDesC8& domainDiff = uriDomain.Left(pos);

			// Remove one character from each end. ie start at pos 1 and take a length
			// which is 2 shorter than the original descriptor
			const TDesC8& diffMiddle = domainDiff.Mid(1, domainDiff.Length() - 2);
			if(diffMiddle.Locate(dot) != KErrNotFound)
				return EFalse;
			}
		}
	else
		{
		// if the domain attribute is not found add it
		THTTPHdrVal val(iStringPool.OpenFStringL(aUri.Extract(EUriHost)));
		aCookie.SetAttributeL(CCookie::EDomain, val);
		val.StrF().Close();
		}

	if(!CheckPortMatch(aCookie, aUri))
		return EFalse;

	return ETrue;
	}