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- /* -*- Mode: IDL; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
- *
- * ***** BEGIN LICENSE BLOCK *****
- * Version: MPL 1.1/GPL 2.0/LGPL 2.1
- *
- * The contents of this file are subject to the Mozilla Public License Version
- * 1.1 (the "License"); you may not use this file except in compliance with
- * the License. You may obtain a copy of the License at
- * http://www.mozilla.org/MPL/
- *
- * Software distributed under the License is distributed on an "AS IS" basis,
- * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
- * for the specific language governing rights and limitations under the
- * License.
- *
- * The Original Code is mozilla.org code.
- *
- * The Initial Developer of the Original Code is
- * Netscape Communications Corporation.
- * Portions created by the Initial Developer are Copyright (C) 1998
- * the Initial Developer. All Rights Reserved.
- *
- * Contributor(s):
- * John Bandhauer <jband@netscape.com>
- *
- * Alternatively, the contents of this file may be used under the terms of
- * either of the GNU General Public License Version 2 or later (the "GPL"),
- * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
- * in which case the provisions of the GPL or the LGPL are applicable instead
- * of those above. If you wish to allow use of your version of this file only
- * under the terms of either the GPL or the LGPL, and not to allow others to
- * use your version of this file under the terms of the MPL, indicate your
- * decision by deleting the provisions above and replace them with the notice
- * and other provisions required by the GPL or the LGPL. If you do not delete
- * the provisions above, a recipient may use your version of this file under
- * the terms of any one of the MPL, the GPL or the LGPL.
- *
- * ***** END LICENSE BLOCK ***** */
-
- /* The long avoided variant support for xpcom. */
-
- #include "nsIVariant.h"
- #include "nsStringFwd.h"
- #include "xpt_struct.h"
-
- /**
- * Map the nsAUTF8String, nsUTF8String classes to the nsACString and
- * nsCString classes respectively for now. These defines need to be removed
- * once Jag lands his nsUTF8String implementation.
- */
- #define nsAUTF8String nsACString
- #define nsUTF8String nsCString
- #define PromiseFlatUTF8String PromiseFlatCString
-
- /**
- * nsDiscriminatedUnion is a type that nsIVariant implementors *may* use
- * to hold underlying data. It has no methods. So, its use requires no linkage
- * to the xpcom module.
- */
-
- struct nsDiscriminatedUnion
- {
- union {
- PRInt8 mInt8Value;
- PRInt16 mInt16Value;
- PRInt32 mInt32Value;
- PRInt64 mInt64Value;
- PRUint8 mUint8Value;
- PRUint16 mUint16Value;
- PRUint32 mUint32Value;
- PRUint64 mUint64Value;
- float mFloatValue;
- double mDoubleValue;
- PRBool mBoolValue;
- char mCharValue;
- PRUnichar mWCharValue;
- nsIID mIDValue;
- nsAString* mAStringValue;
- nsAUTF8String* mUTF8StringValue;
- nsACString* mCStringValue;
- struct {
- nsISupports* mInterfaceValue;
- nsIID mInterfaceID;
- } iface;
- struct {
- nsIID mArrayInterfaceID;
- void* mArrayValue;
- PRUint32 mArrayCount;
- PRUint16 mArrayType;
- } array;
- struct {
- char* mStringValue;
- PRUint32 mStringLength;
- } str;
- struct {
- PRUnichar* mWStringValue;
- PRUint32 mWStringLength;
- } wstr;
- } u;
- PRUint16 mType;
- };
-
- /**
- * nsVariant implements the generic variant support. The xpcom module registers
- * a factory (see NS_VARIANT_CONTRACTID in nsIVariant.idl) that will create
- * these objects. They are created 'empty' and 'writable'.
- *
- * nsIVariant users won't usually need to see this class.
- *
- * This class also has static helper methods that nsIVariant *implementors* can
- * use to help them do all the 'standard' nsIVariant data conversions.
- */
-
- class NS_COM nsVariant : public nsIWritableVariant
- {
- public:
- NS_DECL_ISUPPORTS
- NS_DECL_NSIVARIANT
- NS_DECL_NSIWRITABLEVARIANT
-
- nsVariant();
-
- static nsresult Initialize(nsDiscriminatedUnion* data);
- static nsresult Cleanup(nsDiscriminatedUnion* data);
-
- static nsresult ConvertToInt8(const nsDiscriminatedUnion& data, PRUint8 *_retval);
- static nsresult ConvertToInt16(const nsDiscriminatedUnion& data, PRInt16 *_retval);
- static nsresult ConvertToInt32(const nsDiscriminatedUnion& data, PRInt32 *_retval);
- static nsresult ConvertToInt64(const nsDiscriminatedUnion& data, PRInt64 *_retval);
- static nsresult ConvertToUint8(const nsDiscriminatedUnion& data, PRUint8 *_retval);
- static nsresult ConvertToUint16(const nsDiscriminatedUnion& data, PRUint16 *_retval);
- static nsresult ConvertToUint32(const nsDiscriminatedUnion& data, PRUint32 *_retval);
- static nsresult ConvertToUint64(const nsDiscriminatedUnion& data, PRUint64 *_retval);
- static nsresult ConvertToFloat(const nsDiscriminatedUnion& data, float *_retval);
- static nsresult ConvertToDouble(const nsDiscriminatedUnion& data, double *_retval);
- static nsresult ConvertToBool(const nsDiscriminatedUnion& data, PRBool *_retval);
- static nsresult ConvertToChar(const nsDiscriminatedUnion& data, char *_retval);
- static nsresult ConvertToWChar(const nsDiscriminatedUnion& data, PRUnichar *_retval);
- static nsresult ConvertToID(const nsDiscriminatedUnion& data, nsID * _retval);
- static nsresult ConvertToAString(const nsDiscriminatedUnion& data, nsAString & _retval);
- static nsresult ConvertToAUTF8String(const nsDiscriminatedUnion& data, nsAUTF8String & _retval);
- static nsresult ConvertToACString(const nsDiscriminatedUnion& data, nsACString & _retval);
- static nsresult ConvertToString(const nsDiscriminatedUnion& data, char **_retval);
- static nsresult ConvertToWString(const nsDiscriminatedUnion& data, PRUnichar **_retval);
- static nsresult ConvertToISupports(const nsDiscriminatedUnion& data, nsISupports **_retval);
- static nsresult ConvertToInterface(const nsDiscriminatedUnion& data, nsIID * *iid, void * *iface);
- static nsresult ConvertToArray(const nsDiscriminatedUnion& data, PRUint16 *type, nsIID* iid, PRUint32 *count, void * *ptr);
- static nsresult ConvertToStringWithSize(const nsDiscriminatedUnion& data, PRUint32 *size, char **str);
- static nsresult ConvertToWStringWithSize(const nsDiscriminatedUnion& data, PRUint32 *size, PRUnichar **str);
-
- static nsresult SetFromVariant(nsDiscriminatedUnion* data, nsIVariant* aValue);
-
- static nsresult SetFromInt8(nsDiscriminatedUnion* data, PRUint8 aValue);
- static nsresult SetFromInt16(nsDiscriminatedUnion* data, PRInt16 aValue);
- static nsresult SetFromInt32(nsDiscriminatedUnion* data, PRInt32 aValue);
- static nsresult SetFromInt64(nsDiscriminatedUnion* data, PRInt64 aValue);
- static nsresult SetFromUint8(nsDiscriminatedUnion* data, PRUint8 aValue);
- static nsresult SetFromUint16(nsDiscriminatedUnion* data, PRUint16 aValue);
- static nsresult SetFromUint32(nsDiscriminatedUnion* data, PRUint32 aValue);
- static nsresult SetFromUint64(nsDiscriminatedUnion* data, PRUint64 aValue);
- static nsresult SetFromFloat(nsDiscriminatedUnion* data, float aValue);
- static nsresult SetFromDouble(nsDiscriminatedUnion* data, double aValue);
- static nsresult SetFromBool(nsDiscriminatedUnion* data, PRBool aValue);
- static nsresult SetFromChar(nsDiscriminatedUnion* data, char aValue);
- static nsresult SetFromWChar(nsDiscriminatedUnion* data, PRUnichar aValue);
- static nsresult SetFromID(nsDiscriminatedUnion* data, const nsID & aValue);
- static nsresult SetFromAString(nsDiscriminatedUnion* data, const nsAString & aValue);
- static nsresult SetFromAUTF8String(nsDiscriminatedUnion* data, const nsAUTF8String & aValue);
- static nsresult SetFromACString(nsDiscriminatedUnion* data, const nsACString & aValue);
- static nsresult SetFromString(nsDiscriminatedUnion* data, const char *aValue);
- static nsresult SetFromWString(nsDiscriminatedUnion* data, const PRUnichar *aValue);
- static nsresult SetFromISupports(nsDiscriminatedUnion* data, nsISupports *aValue);
- static nsresult SetFromInterface(nsDiscriminatedUnion* data, const nsIID& iid, nsISupports *aValue);
- static nsresult SetFromArray(nsDiscriminatedUnion* data, PRUint16 type, const nsIID* iid, PRUint32 count, void * aValue);
- static nsresult SetFromStringWithSize(nsDiscriminatedUnion* data, PRUint32 size, const char *aValue);
- static nsresult SetFromWStringWithSize(nsDiscriminatedUnion* data, PRUint32 size, const PRUnichar *aValue);
-
- static nsresult SetToVoid(nsDiscriminatedUnion* data);
- static nsresult SetToEmpty(nsDiscriminatedUnion* data);
- static nsresult SetToEmptyArray(nsDiscriminatedUnion* data);
-
- private:
- ~nsVariant();
-
- protected:
- nsDiscriminatedUnion mData;
- PRBool mWritable;
- };
-
- /**
- * Users of nsIVariant should be using the contractID and not this CID.
- * - see NS_VARIANT_CONTRACTID in nsIVariant.idl.
- */
-
- #define NS_VARIANT_CID \
- { /* 0D6EA1D0-879C-11d5-90EF-0010A4E73D9A */ \
- 0xd6ea1d0, \
- 0x879c, \
- 0x11d5, \
- {0x90, 0xef, 0x0, 0x10, 0xa4, 0xe7, 0x3d, 0x9a}}
-
- #define NS_VARIANT_CLASSNAME "Variant"
-
-