Location:
charconv.h
Link against: charconv.lib
CCnvCharacterSetConverter
Supported from 5.1
Converts text between Unicode and other character sets. The first
stage of the conversion is to specify the non-Unicode character set being
converted to or from. This is done by calling one of the overloads of
PrepareToConvertToOrFromL()
.
The second stage is to convert the text — using one
of the overloads of ConvertFromUnicode()
or
ConvertToUnicode()
.
Where possible the first documented overload of
PrepareToConvertToOrFromL()
should be used because the second
overload panics if the specified character set is not available —
the first overload simply returns whether the character set is available or not
available. However if the conversions are to be performed often, or if the user
must select the character set for the conversion from a list, the second
overload may be more appropriate.
The first overload is less efficient than the second, because it
searches through the file system for the selected character set every time it
is invoked. The second overload searches through an array of all available
character sets. In this method, the file system need only be searched
once — when CreateArrayOfCharacterSetsAvailableLC()
or CreateArrayOfCharacterSetsAvailableL()
is used to create the
array.
The conversion functions allow users of this class to perform partial conversions on an input descriptor — handling the situation where the input descriptor is truncated mid way through a multi-byte character. This means that you do not have to guess how big to make the output descriptor for a given input descriptor — you can simply do the conversion in a loop using a small output descriptor. The ability to handle truncated descriptors also allows users of the class to convert information received in chunks from an external source.
The class also provides a number of utility functions.
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Defined in CCnvCharacterSetConverter
:
Anonymous
, AsciiConversionData()
, AutoDetectCharacterSetL()
, ConvertCharacterSetIdentifierToMibEnumL()
, ConvertCharacterSetIdentifierToStandardNameL()
, ConvertFromUnicode()
, ConvertMibEnumOfCharacterSetToIdentifierL()
, ConvertStandardNameOfCharacterSetToIdentifier()
, ConvertStandardNameOfCharacterSetToIdentifierL()
, ConvertToUnicode()
, CreateArrayOfCharacterSetsAvailableL()
, CreateArrayOfCharacterSetsAvailableLC()
, DoConvertFromUnicode()
, DoConvertToUnicode()
, EAvailable
, EBigEndian
, EDowngradeExoticLineTerminatingCharactersToCarriageReturnLineFeed
, EDowngradeExoticLineTerminatingCharactersToJustLineFeed
, EErrorIllFormedInput
, EInputConversionFlagAllowTruncatedInputNotEvenPartlyConsumable
, EInputConversionFlagAppend
, EInputConversionFlagStopAtFirstUnconvertibleCharacter
, ELittleEndian
, ENotAvailable
, EOutputConversionFlagInputIsTruncated
, KStateDefault
, NewL()
, NewLC()
, PrepareToConvertToOrFromL()
, SCharacterSet
, SetDefaultEndiannessOfForeignCharacters()
, SetDowngradeForExoticLineTerminatingCharacters()
, SetReplacementForUnconvertibleUnicodeCharactersL()
, TArrayOfAscendingIndices
, TAvailability
, TDowngradeForExoticLineTerminatingCharacters
, TEndianness
, TError
, ~CCnvCharacterSetConverter()
Inherited from CBase
:
operator new()
static CCnvCharacterSetConverter* NewL();
Allocates and constructs a
CCnvCharacterSetConverter
object. If there is insufficient memory
to create the object, the function leaves.
Since the memory is allocated on the heap, objects of this type
should be destroyed using the delete
operator when the required
conversions are complete.
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static CCnvCharacterSetConverter* NewLC();
Allocates and constructs a
CCnvCharacterSetConverter
object, and leaves the object on the
cleanup stack. If there is insufficient memory to create the object, the
function leaves.
Since the memory is allocated on the heap, objects of this type
should be destroyed using either the CleanupStack::Pop()
function
and then the delete operator, or the CleanupStack::PopAndDestroy()
function.
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virtual ~CCnvCharacterSetConverter();
The destructor frees all resources owned by the object, prior to its destruction.
TAvailability PrepareToConvertToOrFromL(TUint aCharacterSetIdentifier, RFs& aFileServerSession);
Specifies the character set to convert to or from.
aCharacterSetIdentifier
is a UID which identifies a character set.
It can be one of the character sets for which conversion is built into EPOC, or
it may be a character set for which conversion is implemented by a plug-in DLL.
In the latter case, the function searches through the file system for the DLL
which implements the character conversion.
Either this function or its overload must be called before
using the conversion functions ConvertFromUnicode()
or
ConvertToUnicode()
.
This overload of the function is simpler to use than the other
and does not panic if the character set with the specified UID is not available
at run time — it simply returns ENotAvailable
. It
should be used when the conversion character set is specified within the text
object being converted, e.g. an email message, or an HTML document. If the
character set is not specified, the user must be presented with a list of all
available sets, so it makes sense to use the other overload.
The function may need to search the file system each time it is called. If conversion takes place repeatedly over a short period, it may be more efficient to use the other overload.
Notes:
The file server session argument is used for locating and opening the required character set conversion DLL.
Although the other overload of this function is more efficient, if the character set is one for which conversion is built into EPOC, the difference in speed is negligible.
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void PrepareToConvertToOrFromL(TUint aCharacterSetIdentifier, const CArrayFix<SCharacterSet>& aArrayOfCharacterSetsAvailable, RFs& aFileServerSession);
Specifies the character set to convert to or from.
aCharacterSetIdentifier
is a UID which identifies a character set.
It can be one of the character sets for which conversion is built into EPOC, or
it may be a character set for which the conversion is implemented by a plug-in
DLL.
The function searches the character set array specified
(aArrayOfCharacterSetsAvailable
). This is an array containing all
of the character sets for which conversion is available. It is created by
calling CreateArrayOfCharacterSetsAvailableL()
or
CreateArrayOfCharacterSetsAvailableLC()
. You should be sure that
conversion is available for aCharacterSetIdentifier
, because if
not, a panic occurs. Otherwise, use the other overload of this function.
Either this function or its overload, must be called before
using the conversion functions ConvertFromUnicode()
or
ConvertToUnicode()
.
Unlike the other overload, this function does not search the
file system for plug-in conversion DLLs, (unless
aArrayOfCharacterSetsAvailable
is NULL). This function should be
used if conversions are to be performed often, or if the conversion character
set is to be selected by the user. Generating the array of all the available
character sets once and searching though it is more efficient than the method
used by the other overload, in which the file system may be searched every time
it is invoked.
Notes:
The file server session argument is used to open the required character set conversion data file.
The array passed to this function can also be used to provide a list from which a user can select the desired conversion character set.
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static CArrayFix<SCharacterSet>* CreateArrayOfCharacterSetsAvailableL(RFs& aFileServerSession);
Creates an array identifying all the character sets for which conversion is available. These can be character sets for which conversion is built into EPOC, or they may be character sets for which conversion is implemented by a plug-in DLL.
The array returned can be used by one of the
PrepareToConvertToOrFromL()
overloads to provide a list of
all the character sets available for conversion. The caller of this function is responsible for deleting the array, and should not modify it.
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static CArrayFix<SCharacterSet>* CreateArrayOfCharacterSetsAvailableLC(RFs& aFileServerSession);
Creates an array identifying all the character sets for which conversion is available and pushes a pointer to it onto the cleanup stack. These can be character sets for which conversion is built into EPOC, or they may be character sets for which conversion is implemented by a plug-in DLL.
The array returned can be used by one of the
PrepareToConvertToOrFromL()
overloads to provide a list of
all the character sets available for conversion. The caller of this function is responsible for deleting the array, and should not modify it.
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TInt ConvertFromUnicode(TDes8& aForeign, const TDesC16& aUnicode) const;
TInt ConvertFromUnicode(TDes8& aForeign, const TDesC16& aUnicode, TInt& aNumberOfUnconvertibleCharacters) const;
TInt ConvertFromUnicode(TDes8& aForeign, const TDesC16& aUnicode, TInt& aNumberOfUnconvertibleCharacters, TInt& aIndexOfFirstUnconvertibleCharacter) const;
Converts text encoded in the Unicode character set (UCS-2) into other character sets.
The first overload of the function simply performs the conversion. The second overload converts the text and gets the number of characters that could not be converted. The third overload converts the text, gets the number of characters that could not be converted, and also gets the index of the first character that could not be converted. A fourth overload was introduced in v6.0 — see below.
All overloads cause a panic if no target character set has been
selected to convert to (i.e. either overload of
PrepareToConvertToOrFromL()
must have been successfully called
beforehand). You may also need to call
SetDefaultEndiannessOfForeignCharacters()
to define the
endian-ness of the output descriptor.
Notes:
A sixteen-bit descriptor is used to hold the source Unicode encoded text, and an eight-bit descriptor is used to hold the converted non-Unicode text. Eight-bit descriptors are used because non-Unicode character sets may use a single byte per character (e.g. Code Page 1252) or more than one byte per character (e.g. GB 2312-80) or even a variable number of bytes per character (e.g. Shift-JIS).
The function will fail to convert all the input descriptor if the output descriptor is not long enough to hold all the text.
Unicode characters cannot be converted if there is no
equivalent for them in the target character set. This does not stop the
conversion, the missing character is simply replaced by the character in the
target character set which represents unknown characters. This default unknown
character can be changed using
SetReplacementForUnconvertibleUnicodeCharactersL()
.
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TInt ConvertFromUnicode(TDes8& aForeign, const TDesC16& aUnicode, TArrayOfAscendingIndices& aIndicesOfUnconvertibleCharacters) const;
Supported from 6.0
Converts Unicode text into another character set.
Differs from the other overloads of this function by returning the indices of all of the characters in the source Unicode text which could not be converted.
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TInt ConvertToUnicode(TDes16& aUnicode, const TDesC8& aForeign, TInt& aState) const;
TInt ConvertToUnicode(TDes16& aUnicode, const TDesC8& aForeign, TInt& aState, TInt& aNumberOfUnconvertibleCharacters) const;
TInt ConvertToUnicode(TDes16& aUnicode, const TDesC8& aForeign, TInt& aState, TInt& aNumberOfUnconvertibleCharacters, TInt& aIndexOfFirstByteOfFirstUnconvertibleCharacter) const;
Converts text encoded in a non-Unicode character set into the Unicode character set (UCS-2).
The first overload of the function simply performs the conversion. The second overload converts the text and gets the number of bytes in the input string that could not be converted. The third overload converts the text, gets the number of bytes that could not be converted, and also gets the index of the first byte that could not be converted.
All overloads cause a panic if no source character set has been
selected to convert from (i.e. either overload of
PrepareToConvertToOrFromL()
must have been successfully called
beforehand). You may also need to call
SetDefaultEndiannessOfForeignCharacters()
to define the
endian-ness of the input descriptor.
Notes:
Since Unicode is intended to be the superset of all character sets, the function should usually report zero unconverted characters. Unconvertible characters will exist if the input descriptor contains illegal characters, i.e. values not in the selected non-Unicode character set.
The presence of illegal characters does not stop the conversion. The missing character is simply replaced by the Unicode character which represents unknown characters (0xFFFD).
If the source text consists solely of an incomplete
character, the function returns EErrorIllFormedInput
. The reason
for this is to prevent the possibility of the calling code getting into a
infinite loop.
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static TInt DoConvertFromUnicode(const SCnvConversionData& aConversionData, TEndianness aDefaultEndiannessOfForeignCharacters, const TDesC8& aReplacementForUnconvertibleUnicodeCharacters, TDes8& aForeign, const TDesC16& aUnicode, TArrayOfAscendingIndices& aIndicesOfUnconvertibleCharacters);
Supported from 6.0
Converts Unicode text into another character set. The Unicode
text specified in aUnicode
is converted using the conversion data
object (aConversionData
) provided by the plug-in for the foreign
character set, and the converted text is returned in
aForeign
.
Note
This is a utility function that should only be called from a
plug-in conversion library's implementation of
ConvertFromUnicode()
. Users of the character conversion API should
use one of the overloads of ConvertFromUnicode()
instead.
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static TInt DoConvertFromUnicode(const SCnvConversionData& aConversionData, TEndianness aDefaultEndiannessOfForeignCharacters, const TDesC8& aReplacementForUnconvertibleUnicodeCharacters, TDes8& aForeign, const TDesC16& aUnicode, TArrayOfAscendingIndices& aIndicesOfUnconvertibleCharacters, TUint& aOutputConversionFlags, TUint aInputConversionFlags);
Supported from 6.0
Converts Unicode text into another character set. The Unicode
text specified in aUnicode
is converted using the conversion data
object (aConversionData
) provided by the plug-in for the foreign
character set, and the converted text is returned in
aForeign
.
This overload differs from the previous one in that it allows the caller to specify flags which give more control over the conversion.
Note
This is a utility function that should only be called from a
plug-in conversion library's implementation of
ConvertFromUnicode()
. Users of the character conversion API should
use one of the overloads of ConvertFromUnicode()
instead.
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static TInt DoConvertToUnicode(const SCnvConversionData& aConversionData, TEndianness aDefaultEndiannessOfForeignCharacters, TDes16& aUnicode, const TDesC8& aForeign, TInt& aNumberOfUnconvertibleCharacters, TInt& aIndexOfFirstByteOfFirstUnconvertibleCharacter);
Supported from 6.0
Converts non-Unicode text into Unicode. The non-Unicode text
specified in aForeign
is converted using the conversion data
object (aConversionData
) provided by the plug-in for the foreign
character set, and the converted text is returned in
aUnicode
.
Notes:
This is a utility function that should only be called from
a plug-in conversion library's implementation of
ConvertToUnicode()
. Ordinary users of the character conversion API
should use one of the overloads of ConvertToUnicode()
instead.
The last two arguments return information about unconverted
characters. Because Unicode is intended to cover all possible characters, these
rarely report anything other than zero characters. However they report the
existence of unconvertible characters if the input descriptor
aForeign
contains illegal characters, i.e. values not in the
foreign character set.
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static TInt DoConvertToUnicode(const SCnvConversionData& aConversionData, TEndianness aDefaultEndiannessOfForeignCharacters, TDes16& aUnicode, const TDesC8& aForeign, TInt& aNumberOfUnconvertibleCharacters, TInt& aIndexOfFirstByteOfFirstUnconvertibleCharacter, TUint& aOutputConversionFlags, TUint aInputConversionFlags);
Supported from 6.0
Converts non-Unicode text into Unicode. The non-Unicode text
specified in aForeign
is converted using the conversion data
object (aConversionData
) provided by the plug-in for the foreign
character set, and the converted text is returned in
aUnicode
.
This overload differs from the previous one in that it allows the caller to specify flags which give more control over the conversion.
Notes:
This is a utility function that should only be called from
a plug-in conversion library's implementation of
ConvertToUnicode()
. Ordinary users of the character conversion API
should use one of the overloads of ConvertToUnicode()
instead.
The aNumberOfUnconvertibleCharacters
and
aIndexOfFirstByteOfFirstUnconvertibleCharacter
arguments return
information about unconverted characters. Because Unicode is intended to cover
all possible characters, these rarely report anything other than zero
characters. However they report the existence of unconvertible characters if
the input descriptor aForeign
contains illegal characters, i.e.
values not in the foreign character set.
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static const SCnvConversionData& AsciiConversionData();
Supported from 6.0
Returns a ready-made SCnvConversionData
object for
converting between Unicode and ASCII. This can be passed into the
aConversionData
parameter to DoConvertFromUnicode()
or DoConvertToUnicode()
.
Note
This utility function should only be called by a plug-in conversion library.
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static void AutoDetectCharacterSetL(TInt& aConfidenceLevel, TUint& aCharacterSetIdentifier, const CArrayFix<SCharacterSet>& aArrayOfCharacterSetsAvailable, const TDesC8& aSample);
Supported from 6.1
Attempts to determine the non-Unicode character set of the sample text from those supported on the phone.
For each of the available character sets, its implementation of
IsInThisCharacterSetL()
is called. The character set which returns
the highest confidence level (i.e. which generates the fewest
0xFFFD
Unicode replacement characters) is returned in
aCharacterSetIdentifier
.
This function merely determines if the sample text is convertible with this converter: it does no textual analysis on the result. Therefore, this function is not capable of differentiating between very similar encodings (for example the different ISO 8859 variants).
Any code making use of this function should provide a way for the user to override the selection that this function makes.
Please note that the operation of this function is slow, and takes no account of the usual context that would be used in guessing a character set (for example, the language that is expected to be encoded or the transport used). For situations where such context is known, a faster, more accurate solution is advisable.
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HBufC8* ConvertCharacterSetIdentifierToStandardNameL(TUint aCharacterSetIdentifier) const;
Withdrawn in 6.0
Gets the Internet-standard name of a character set, which is
identified in EPOC by its UID. The function can be called at any time in the
CCnvCharacterSetConverter
object’s lifetime.
Note:
This function uses a hard-coded list of names.
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HBufC8* ConvertCharacterSetIdentifierToStandardNameL(TUint aCharacterSetIdentifier, RFs& aFileServerSession);
Supported from 6.0
Returns the Internet-standard name of a character set identified in EPOC by a UID.
If the character set specified is not one for which EPOC provides built-in conversion, the file system is searched for plug-ins which implement the conversion, hence the need for a file server session.
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TUint ConvertStandardNameOfCharacterSetToIdentifier(const TDesC8& aStandardNameOfCharacterSet) const;
Withdrawn in 6.0
Gets the UID of a character set for a given Internet-standard name.
Note:
This function uses a hard-coded list of names.
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TUint ConvertStandardNameOfCharacterSetToIdentifierL(const TDesC8& aStandardNameOfCharacterSet, RFs& aFileServerSession);
Supported from 6.0
Gets the UID of a character set identified by its Internet-standard name (the matching is case-insensitive).
If the character set specified is not one for which EPOC provides built-in conversion, the function searches the file system for plug-ins which implement the conversion and which provide the name-to-UID mapping information.
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TUint ConvertMibEnumOfCharacterSetToIdentifierL(TInt aMibEnumOfCharacterSet, RFs& aFileServerSession);
Supported from 6.0
Converts a MIB enum value to the UID value of the character set.
If the character set identified is not one for which EPOC provides built-in conversion, the function searches the file system for plug-ins which implement the conversion and which provide the MIB enum-to-UID mapping information.
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TInt ConvertCharacterSetIdentifierToMibEnumL(TUint aCharacterSetIdentifier, RFs& aFileServerSession);
Supported from 6.0
Converts the UID of a character set to its MIB enum value.
If the character set identified is not one for which EPOC provides built-in conversion, the function searches the file system for plug-ins which implement the conversion and which provide the UID-to-MIB enum mapping information.
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void SetDefaultEndiannessOfForeignCharacters(TEndianness aEndianness);
Sets the default endian-ness used by the
ConvertFromUnicode()
and ConvertToUnicode()
functions
to convert between Unicode and non-Unicode character sets.
The endian-ness of a multi-byte character set may be defined in the character set definition or, as in the case of UCS-2, be operating system dependent. If the endian-ness of the current character set is defined by the character set itself, then the default endian-ness specified by this function is ignored.
Notes:
The issue of endian-ness does not apply to single byte character sets — as there is no byte order.
This function should be called (if at all) after calling PrepareToConvertToOrFromL()
and before calling ConvertFromUnicode()
and/or ConvertToUnicode()
.
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void SetDowngradeForExoticLineTerminatingCharacters(TDowngradeForExoticLineTerminatingCharacters aDowngradeForExoticLineTerminatingCharacters);
Supported from 6.0
Sets whether the Unicode 'line separator' and 'paragraph separator' characters (0x2028 and 0x2029 respectively) should be converted into a carriage return / line feed pair, or into a line feed only when converting from Unicode into a foreign character set. This applies to all foreign character sets that do not contain a direct equivalent of these Unicode character codes.
By default, line and paragraph separators are converted into a
CR/LF pair. This function should be called (if at all) after calling
PrepareToConvertToOrFromL()
and before calling
ConvertFromUnicode()
and/or
ConvertToUnicode()
.
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void SetReplacementForUnconvertibleUnicodeCharactersL(const TDesC8& aReplacementForUnconvertibleUnicodeCharacters);
Sets the character used to replace unconvertible characters in the output descriptor, when converting from Unicode into another character set.
The default replacement for unconvertible Unicode characters is specified in the conversion data for the character set. The replacement text which is set using this function overrides the default value.
Notes:
If the replacement character is multi-byte, and its endian-ness is undefined in the character set, then its byte order is taken by default to be little-endian.
PrepareToConvertToOrFromL()
undoes the effect
of any previous calls to this function. So, to have any effect, this
function should be called between the PrepareToConvertToOrFromL()
call and the subsequent ConvertFromUnicode()
call or calls.
The value only applies when converting from Unicode to another character set. In Unicode, the code for “unknown character” is always 0xFFFD.
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TEndianness
Specifies the default endian-ness of the current character set.
Used by
SetDefaultEndiannessOfForeignCharacters()
.
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TAvailability
Indicates whether a character set is available or
unavailable for conversion. Used by the second overload of
PrepareToConvertToOrFromL()
.
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TError
Flags conversion errors. At this stage there is only one error flag — others may be added in the future.
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Anonymous
Sets the initial state of the conversion variable in the
ConvertToUnicode()
function.
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TDowngradeForExoticLineTerminatingCharacters
Supported from 6.0
Downgrade for line and paragraph separators
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Anonymous
Supported from 6.0
Input flags used to control a character set conversion.
Note
This enumeration can be used in the
DoConvertToUnicode()
and DoConvertFromUnicode()
functions. These are part of the Character Conversion Plug-in Provider API and
are for use by plug-in conversion libraries only.
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Anonymous
Supported from 6.0
Output flag used to indicate whether or not a character in the source descriptor is the first half of a surrogate pair, but is the last character in the descriptor to convert.
Note
This enumeration can be used in the
DoConvertToUnicode()
and DoConvertFromUnicode()
functions. These are part of the Character Conversion Plug-in Provider API and
are for use by plug-in conversion libraries only.
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SCharacterSet
Stores information about a non-Unicode character set. The
information is used to locate the conversion information required by
ConvertFromUnicode()
and ConvertToUnicode()
.
An array of these struct
s — which
contains all available character sets — can be generated by
CreateArrayOfCharacterSetsAvailableLC()
and
CreateArrayOfCharacterSetsAvailableL()
, and is used by one of the
overloads of PrepareToConvertToOrFromL()
.
Defined in CCnvCharacterSetConverter::SCharacterSet
:
Identifier()
, Name()
, NameIsFileName()
Identifier()
TUint Identifier() const;
Gets the character set’s UID.
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Name()
TPtrC Name() const;
Gets the full path and filename of the DLL which implements conversion for the character set.
If the character set is one for which conversion is built
into EPOC rather than implemented by a plug in DLL, the function just returns
the name of the character set. The NameIsFileName()
function can
be used to determine whether or not it is legal to create a
TParsePtrC
object over the descriptor returned by
Name()
.
Notes:
The name returned cannot be treated as an
Internet-standard name, it is locale-independent and should be mapped to the
locale-dependent name by software at a higher level before being shown to the
user. Conversion from Internet-standard names of character sets to the UID
identifiers is provided by the member function
ConvertStandardNameOfCharacterSetToIdentifierL()
.
Typically, to find the user-displayable name (as opposed to the internet-standard name) of a character set, you would do something like this:
const CCnvCharacterSetConverter::SCharacterSet& characterSet=...;
const TPtrC userDisplayable(characterSet.NameIsFileName()? TParsePtrC(characterSet.Name()).Name(): characterSet.Name());
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NameIsFileName()
TBool NameIsFileName() const;
Tests whether a filename given by the function
SCharacterSet::Name()
is a real file name (i.e. conversion is
provided by a plug in DLL), or just the character set name (i.e. conversion is
built into EPOC).
Note:
If the function returns ETrue
then the path
and filename can be parsed using TParse
or TParsePtrC
functions to obtain just the filename.
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TArrayOfAscendingIndices
Supported from 6.0
Holds an ascending array of the indices of the characters in
the source Unicode text which could not be converted by
CCnvCharacterSetConverter::ConvertFromUnicode()
into the foreign
character set
Defined in CCnvCharacterSetConverter::TArrayOfAscendingIndices
:
AppendIndex()
, EAppendFailed
, EAppendSuccessful
, NumberOfIndices()
, Remove()
, RemoveAll()
, TAppendResult
, TArrayOfAscendingIndices()
, operator[]()
TArrayOfAscendingIndices()
TArrayOfAscendingIndices()
C++ constructor. The array is initialised to be of length zero.
AppendIndex()
TAppendResult AppendIndex(TInt aIndex);
Appends an index to the array of indices. The value of
aIndex
should be greater than that of the last index in the array,
to maintain an ascending array. The return value should be tested to see
whether the function succeeded or not.
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Remove()
void Remove(TInt aIndexOfIndex)
Deletes a single index from the array.
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RemoveAll()
void RemoveAll()
Supported from 6.1
Deletes all indices from the array.
NumberOfIndices()
TInt NumberOfIndices() const
Returns the number of indices in the array.
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operator[]()
TInt operator[](TInt aIndexOfIndex) const
Gets the value of the specified index.
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TAppendResult
TAppendResult
The return value of
CCnvCharacterSetConverter::AppendIndex()
.
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