本文整理汇总了C++中CFileReader::ReadBlockL方法的典型用法代码示例。如果您正苦于以下问题：C++ CFileReader::ReadBlockL方法的具体用法？C++ CFileReader::ReadBlockL怎么用？C++ CFileReader::ReadBlockL使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类CFileReader的用法示例。
在下文中一共展示了CFileReader::ReadBlockL方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: doTestStepL
//.........这里部分代码省略.........
{
// block size is in bits so to allocate the correct number of bytes divide by 8
// iv is left on the cleanup stack for the duration of the test and deleted in a conditional at the end of the outer block.
// If this conditional block changes, take care to update the condition for deleting this allocated IV, near the end of this function.
iv = HBufC8::NewLC(blockSize/8);
// blocksize is in bits so to allocate the correct number of 8 byte chunks divide by 64
for(TInt i = 0 ; i <blockSize/64 ; i++)
{
iv->Des().Append(_L8("12345678"));
}
TRAP_LOG(err,impl->SetIvL(iv->Des()));
}
// convert to bytesize
blockSize/=8;
blockSize += iOffset;
//read from src file
CFileReader* srcData = CFileReader::NewLC(srcPath,blockSize);
// first step is to read from the src file one block
// at a time, encrypt that block and then write
// the encrypted block out to a temporary file.
CFileWriter* encryptedDataWriter = CFileWriter::NewLC(TPtrC(KTempEncryptedFilePath));
TInt numBlocks = srcData->NumBlocks();
INFO_PRINTF1(_L("Starting Incremental Encryption..."));
for(TInt i = 1 ; i <= numBlocks ; i++)
{
TRAP_LOG(err,srcData->ReadBlockL());
//Create buffer for encrypted data
TInt maxOutputLength = impl->MaxFinalOutputLength(TPtrC8(*srcData).Length());
HBufC8* encrypted = HBufC8::NewLC(maxOutputLength);
TPtr8 encryptedPtr = encrypted->Des();
if(i == numBlocks)
{
TRAP(err,impl->ProcessFinalL(*srcData, encryptedPtr));
if(err != KErrNone)
{
ERR_PRINTF3(_L("*** ERROR:%d - ProcessFinalL() Block=%d ***"),err,i);
User::Leave(err);
}
}
else
{
TRAP(err,impl->ProcessL(*srcData, encryptedPtr));
if(err != KErrNone)
{
ERR_PRINTF3(_L("*** ERROR:%d - ProcessL() Block=%d ***"),err,i);
User::Leave(err);
}
}
TRAP_LOG(err,encryptedDataWriter->WriteBlockL(encryptedPtr));
CleanupStack::PopAndDestroy(encrypted);
}