TempEncodingHelper Class Reference

use this class to manage strings where the character encoding must be specified and may be different than the actual encoding in the string More...

#include <QoreString.h>

Public Member Functions
DLLLOCAL	TempEncodingHelper ()
	creates an empty TempEncodingHelperObject that may be initialized with TempEncodingHelper::set() later
DLLLOCAL	TempEncodingHelper (const QoreString &s, const QoreEncoding *qe, ExceptionSink *xsink)
	converts the given string to the required encoding if necessary
DLLLOCAL	TempEncodingHelper (const QoreString *s, const QoreEncoding *qe, ExceptionSink *xsink)
	converts the given string to the required encoding if necessary
DLLLOCAL	~TempEncodingHelper ()
	deletes any temporary string being managed by the object
DLLLOCAL char *	giveBuffer ()
	returns a char pointer of the string, the caller owns the pointer returned (it must be manually freed)
DLLLOCAL bool	is_temp () const
	returns true if a temporary string is being managed
DLLLOCAL void	makeTemp ()
	ensures that the object is holding a temporary value
DLLLOCAL	operator bool () const
	returns false if the object is empty (for example, if a Qore-language exception was thrown in the constructor), true if not
DLLLOCAL const QoreString *	operator* ()
	returns the string being managed
DLLLOCAL const QoreString *	operator-> ()
	returns the string being managed
DLLEXPORT void	removeBom ()
	remove any leading byte order marker (BOM) from UTF-16* strings
DLLLOCAL int	set (const QoreString *s, const QoreEncoding *qe, ExceptionSink *xsink)
	discards any current state and sets and converts (if necessary) a new string to the desired encoding

Detailed Description

use this class to manage strings where the character encoding must be specified and may be different than the actual encoding in the string

this class calls QoreString::convertEncoding() if necessary and manages any temporary string created by this call. the destructor will delete any temporary string if necessary. Note that the constructor may add Qore-language exception information to the "xsink" parameter in case character set encoding conversion was necessary and failed

See also

QoreString

// ensure a string is in UTF-8 encoding
TempEncodingHelper utf8_str(str, QCS_UTF8, xsink);
if (!str) // !str is only true if an exception has been thrown in the conversion
    return 0;
printf("%s\n", utf8_str->getBuffer());

Constructor & Destructor Documentation

TempEncodingHelper() [1/2]

DLLLOCAL TempEncodingHelper::TempEncodingHelper ( const QoreString & s, const QoreEncoding * qe, ExceptionSink * xsink )

inline

converts the given string to the required encoding if necessary

Parameters

s	a reference to the QoreString input value
qe	the QoreEncoding required
xsink	if an error occurs, the Qore-language exception information will be added here

Referenced by removeBom().

TempEncodingHelper() [2/2]

DLLLOCAL TempEncodingHelper::TempEncodingHelper ( const QoreString * s, const QoreEncoding * qe, ExceptionSink * xsink )

inline

converts the given string to the required encoding if necessary

Parameters

s	a pointer to the QoreString input value
qe	the QoreEncoding required
xsink	if an error occurs, the Qore-language exception information will be added here

Member Function Documentation

giveBuffer()

DLLLOCAL char * TempEncodingHelper::giveBuffer ( )

inline

returns a char pointer of the string, the caller owns the pointer returned (it must be manually freed)

Returns

a char pointer of the string, the caller owns the pointer returned

operator bool()

DLLLOCAL TempEncodingHelper::operator bool ( ) const

inline

returns false if the object is empty (for example, if a Qore-language exception was thrown in the constructor), true if not

Returns

false if the object is empty, true if not

removeBom()

DLLEXPORT void TempEncodingHelper::removeBom

(

)

remove any leading byte order marker (BOM) from UTF-16* strings

Since

Qore 0.8.13

References TempEncodingHelper().

set()

DLLLOCAL int TempEncodingHelper::set ( const QoreString * s, const QoreEncoding * qe, ExceptionSink * xsink )

inline

discards any current state and sets and converts (if necessary) a new string to the desired encoding

note that the return value is the opposite of most qore functions because it was implemented incorrectly; the documentation has been changed to reflect the incorrect implementation; the implementation was not fixed in order to preserve source compatibility

Parameters

s	a pointer to the QoreString input value
qe	the QoreEncoding required
xsink	if an error occurs, the Qore-language exception information will be added here

Returns

1=OK, 0=an error occurred and a Qore-language exception was raised

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

• include/qore/QoreString.h