QoreStringValueHelper Class Reference

this class is used to safely manage calls to AbstractQoreNode::getStringRepresentation() when a simple QoreString value is needed, stack only, may not be dynamically allocated More...

#include <QoreStringNode.h>

Collaboration diagram for QoreStringValueHelper:

Public Member Methods
DLLEXPORT	QoreStringValueHelper (const QoreValue n)
	creates the object and acquires a pointer to the QoreString representation of the QoreValue passed
DLLEXPORT	QoreStringValueHelper (const QoreValue n, const QoreEncoding *enc, ExceptionSink *xsink)
	gets the QoreString representation and ensures that it's in the desired encoding More...
DLLLOCAL	~QoreStringValueHelper ()
	destroys the object and deletes the QoreString pointer being managed if it was a temporary pointer
DLLLOCAL char *	giveBuffer ()
	returns a char* string that the caller owns and must free() More...
DLLLOCAL QoreString *	giveString ()
	returns a copy of the QoreString that the caller owns More...
DLLLOCAL bool	is_temp () const
	returns true if the pointer being managed is temporary
DLLLOCAL const QoreString *	operator* ()
	returns the object being managed More...
DLLLOCAL const QoreString *	operator-> ()
	returns the object being managed More...

Private Member Methods
DLLLOCAL	QoreStringValueHelper (const QoreStringValueHelper &)
	this function is not implemented; it is here as a private function in order to prohibit it from being used
DLLLOCAL void *	operator new (size_t)
	this function is not implemented; it is here as a private function in order to prohibit it from being used
DLLLOCAL QoreStringValueHelper &	operator= (const QoreStringValueHelper &)
	this function is not implemented; it is here as a private function in order to prohibit it from being used
DLLLOCAL void	setup (ExceptionSink *xsink, const QoreValue n, const QoreEncoding *enc=0)
	sets up the object / common initialization

Detailed Description

this class is used to safely manage calls to AbstractQoreNode::getStringRepresentation() when a simple QoreString value is needed, stack only, may not be dynamically allocated

the QoreString value returned by this function is managed safely in an exception-safe way with this class

QoreStringValueHelper str(n);
printf("str='%s'\n", str->getBuffer());

Constructor & Destructor Documentation

QoreStringValueHelper()

DLLEXPORT QoreStringValueHelper::QoreStringValueHelper	(	const QoreValue	n,
		const QoreEncoding *	enc,
		ExceptionSink *	xsink
	)

gets the QoreString representation and ensures that it's in the desired encoding

a Qore-language exception may be thrown if an encoding error occurs

// get a QoreString value from "node" and ensure it's in UTF-8 encoding
QoreStringValueHelper t(node, QCS_UTF8, xsink);
// return if there was an exception converting the encoding to UTF-8
if (*xsink)
return 0;

// use the string value
return new MStringData(t->getBuffer(), MEncoding::M_ASCII);

Member Function Documentation

giveBuffer()

DLLLOCAL char* QoreStringValueHelper::giveBuffer ( )

inline

returns a char* string that the caller owns and must free()

the object is empty after this call

giveString()

DLLLOCAL QoreString* QoreStringValueHelper::giveString ( )

inline

returns a copy of the QoreString that the caller owns

the object may be left empty after this call

Returns

a QoreString pointer owned by the caller

operator*()

DLLLOCAL const QoreString* QoreStringValueHelper::operator* ( )

inline

returns the object being managed

Returns

the object being managed

operator->()

DLLLOCAL const QoreString* QoreStringValueHelper::operator-> ( )

inline

returns the object being managed

Returns

the object being managed

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The documentation for this class was generated from the following file:

• /export/home2/dnichols/src/el7/qore/git/qore/include/qore/QoreStringNode.h