Class TUnicodeExpander

class TUnicodeExpander : public TUnicodeCompressionState;

Description

A class to hold functions to expand text using the Standard Compression Scheme for Unicode.

A note on error handling and leaving.

Although all the public functions except the constructor can leave, it is possible to guarantee success: that is, guarantee that a call will not leave, and that expansion will be completed. To do this, (i) supply a MUnicodeSink object with a non-leaving WriteUnicodeValueL function, such as a TMemoryUnicodeSink; (ii) read input from a RReadStream with a non-leaving ReadL function; (iii) supply a big enough buffer to write the ouput; you can find out how big by calling ExpandedSizeL, using methods (i) and (ii) to guarantee success.

This guarantee of success is particularly useful when expanding from one memory buffer to another.

Derivation

• TUnicodeCompressionState - (No abstract)

• TUnicodeExpander - A class to hold functions to expand text using the Standard Compression Scheme for Unicode

Members

Defined in TUnicodeExpander:
ExpandL(), ExpandL(), ExpandedSizeL(), ExpandedSizeL(), FlushL(), TUnicodeExpander()

Inherited from TUnicodeCompressionState:
EDynamicWindows, ENotUnicode, EOutputBufferOverflow, ESpecialBases, EStaticWindows, EUnhandledByte, TPanic, anonymous, iActiveWindowBase, iCompressedBytes, iDynamicWindow, iDynamicWindowDefault, iMaxCompressedBytes, iMaxUnicodeWords, iSpecialBase, iStaticWindow, iUnicodeMode, iUnicodeWords

IMPORT_C TUnicodeExpander();

Description

IMPORT_C void ExpandL(MUnicodeSink &aOutput, RReadStream &aInput, TInt aMaxOutputWords=KMaxTInt, TInt aMaxInputBytes=KMaxTInt, TInt *aOutputWords=0,TInt *aInputBytes=0);

Description

Parameters

MUnicodeSink &aOutput RReadStream &aInput TInt aMaxOutputWords TInt aMaxInputBytes TInt *aOutputWords TInt *aInputBytes

IMPORT_C void ExpandL(MUnicodeSink &aOutput, const TUint8 *aInput, TInt aMaxOutputWords=KMaxTInt, TInt aMaxInputBytes=KMaxTInt, TInt *aOutputWords=0,TInt *aInputBytes=0);

Description

Parameters

MUnicodeSink &aOutput const TUint8 *aInput TInt aMaxOutputWords TInt aMaxInputBytes TInt *aOutputWords TInt *aInputBytes

IMPORT_C TInt FlushL(MUnicodeSink &aOutput, TInt aMaxOutputWords, TInt &aOutputWords);

Description

Parameters

MUnicodeSink &aOutput TInt aMaxOutputWords TInt &aOutputWords

Return value

TInt

static IMPORT_C TInt ExpandedSizeL(RReadStream &aInput, TInt aInputBytes);

Description

Parameters

RReadStream &aInput TInt aInputBytes

Return value

TInt

static IMPORT_C TInt ExpandedSizeL(const TUint8 *aInput, TInt aInputBytes);

Description

Parameters

const TUint8 *aInput TInt aInputBytes

Return value

TInt