зеркало из https://github.com/mozilla/gecko-dev.git
169 строки
7.5 KiB
C++
169 строки
7.5 KiB
C++
/* -*- Mode: IDL; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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*
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* The contents of this file are subject to the Netscape Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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* John Bandhauer <jband@netscape.com>
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*/
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/* The long avoided variant support for xpcom. */
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#include "nsIVariant.h"
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#include "xpt_struct.h"
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/**
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* nsDiscriminatedUnion is a type that nsIVariant implementors *may* use
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* to hold underlying data. It has no methods. So, its use requires no linkage
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* to the xpcom module.
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*/
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struct NS_COM nsDiscriminatedUnion
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{
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union {
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PRInt8 mInt8Value;
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PRInt16 mInt16Value;
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PRInt32 mInt32Value;
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PRInt64 mInt64Value;
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PRUint8 mUint8Value;
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PRUint16 mUint16Value;
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PRUint32 mUint32Value;
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PRUint64 mUint64Value;
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float mFloatValue;
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double mDoubleValue;
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PRBool mBoolValue;
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char mCharValue;
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PRUnichar mWCharValue;
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nsIID mIDValue;
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nsAString* mAStringValue;
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struct {
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nsISupports* mInterfaceValue;
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nsIID mInterfaceID;
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};
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struct {
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nsIID mArrayInterfaceID;
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void* mArrayValue;
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PRUint32 mArrayCount;
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PRUint16 mArrayType;
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};
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struct {
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char* mStringValue;
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PRUint32 mStringLength;
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};
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struct {
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PRUnichar* mWStringValue;
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PRUint32 mWStringLength;
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};
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};
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PRUint16 mType;
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};
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/**
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* nsVariant implements the generic variant support. The xpcom module registers
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* a factory (see NS_VARIANT_CONTRACTID in nsIVariant.idl) that will create
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* these objects. They are created 'empty' and 'writable'.
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*
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* nsIVariant users won't usually need to see this class.
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*
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* This class also has static helper methods that nsIVariant *implementors* can
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* use to help them do all the 'standard' nsIVariant data conversions.
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*/
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class NS_COM nsVariant : public nsIWritableVariant
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{
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public:
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NS_DECL_ISUPPORTS
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NS_DECL_NSIVARIANT
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NS_DECL_NSIWRITABLEVARIANT
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nsVariant();
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virtual ~nsVariant();
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static nsresult Initialize(nsDiscriminatedUnion* data);
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static nsresult Cleanup(nsDiscriminatedUnion* data);
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static nsresult ConvertToInt8(const nsDiscriminatedUnion& data, PRUint8 *_retval);
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static nsresult ConvertToInt16(const nsDiscriminatedUnion& data, PRInt16 *_retval);
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static nsresult ConvertToInt32(const nsDiscriminatedUnion& data, PRInt32 *_retval);
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static nsresult ConvertToInt64(const nsDiscriminatedUnion& data, PRInt64 *_retval);
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static nsresult ConvertToUint8(const nsDiscriminatedUnion& data, PRUint8 *_retval);
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static nsresult ConvertToUint16(const nsDiscriminatedUnion& data, PRUint16 *_retval);
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static nsresult ConvertToUint32(const nsDiscriminatedUnion& data, PRUint32 *_retval);
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static nsresult ConvertToUint64(const nsDiscriminatedUnion& data, PRUint64 *_retval);
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static nsresult ConvertToFloat(const nsDiscriminatedUnion& data, float *_retval);
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static nsresult ConvertToDouble(const nsDiscriminatedUnion& data, double *_retval);
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static nsresult ConvertToBool(const nsDiscriminatedUnion& data, PRBool *_retval);
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static nsresult ConvertToChar(const nsDiscriminatedUnion& data, char *_retval);
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static nsresult ConvertToWChar(const nsDiscriminatedUnion& data, PRUnichar *_retval);
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static nsresult ConvertToID(const nsDiscriminatedUnion& data, nsID * _retval);
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static nsresult ConvertToAString(const nsDiscriminatedUnion& data, nsAWritableString & _retval);
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static nsresult ConvertToString(const nsDiscriminatedUnion& data, char **_retval);
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static nsresult ConvertToWString(const nsDiscriminatedUnion& data, PRUnichar **_retval);
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static nsresult ConvertToISupports(const nsDiscriminatedUnion& data, nsISupports **_retval);
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static nsresult ConvertToInterface(const nsDiscriminatedUnion& data, nsIID * *iid, void * *iface);
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static nsresult ConvertToArray(const nsDiscriminatedUnion& data, PRUint16 *type, nsIID* iid, PRUint32 *count, void * *ptr);
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static nsresult ConvertToStringWithSize(const nsDiscriminatedUnion& data, PRUint32 *size, char **str);
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static nsresult ConvertToWStringWithSize(const nsDiscriminatedUnion& data, PRUint32 *size, PRUnichar **str);
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static nsresult SetFromVariant(nsDiscriminatedUnion* data, nsIVariant* aValue);
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static nsresult SetFromInt8(nsDiscriminatedUnion* data, PRUint8 aValue);
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static nsresult SetFromInt16(nsDiscriminatedUnion* data, PRInt16 aValue);
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static nsresult SetFromInt32(nsDiscriminatedUnion* data, PRInt32 aValue);
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static nsresult SetFromInt64(nsDiscriminatedUnion* data, PRInt64 aValue);
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static nsresult SetFromUint8(nsDiscriminatedUnion* data, PRUint8 aValue);
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static nsresult SetFromUint16(nsDiscriminatedUnion* data, PRUint16 aValue);
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static nsresult SetFromUint32(nsDiscriminatedUnion* data, PRUint32 aValue);
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static nsresult SetFromUint64(nsDiscriminatedUnion* data, PRUint64 aValue);
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static nsresult SetFromFloat(nsDiscriminatedUnion* data, float aValue);
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static nsresult SetFromDouble(nsDiscriminatedUnion* data, double aValue);
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static nsresult SetFromBool(nsDiscriminatedUnion* data, PRBool aValue);
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static nsresult SetFromChar(nsDiscriminatedUnion* data, char aValue);
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static nsresult SetFromWChar(nsDiscriminatedUnion* data, PRUnichar aValue);
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static nsresult SetFromID(nsDiscriminatedUnion* data, const nsID & aValue);
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static nsresult SetFromAString(nsDiscriminatedUnion* data, const nsAReadableString & aValue);
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static nsresult SetFromString(nsDiscriminatedUnion* data, const char *aValue);
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static nsresult SetFromWString(nsDiscriminatedUnion* data, const PRUnichar *aValue);
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static nsresult SetFromISupports(nsDiscriminatedUnion* data, nsISupports *aValue);
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static nsresult SetFromInterface(nsDiscriminatedUnion* data, const nsIID& iid, nsISupports *aValue);
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static nsresult SetFromArray(nsDiscriminatedUnion* data, PRUint16 type, const nsIID* iid, PRUint32 count, void * aValue);
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static nsresult SetFromStringWithSize(nsDiscriminatedUnion* data, PRUint32 size, const char *aValue);
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static nsresult SetFromWStringWithSize(nsDiscriminatedUnion* data, PRUint32 size, const PRUnichar *aValue);
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static nsresult SetToVoid(nsDiscriminatedUnion* data);
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static nsresult SetToEmpty(nsDiscriminatedUnion* data);
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protected:
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nsDiscriminatedUnion mData;
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PRBool mWritable;
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};
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/**
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* Users of nsIVariant should be using the contractID and not this CID.
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* - see NS_VARIANT_CONTRACTID in nsIVariant.idl.
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*/
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#define NS_VARIANT_CID \
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{ /* 0D6EA1D0-879C-11d5-90EF-0010A4E73D9A */ \
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0xd6ea1d0, \
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0x879c, \
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0x11d5, \
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{0x90, 0xef, 0x0, 0x10, 0xa4, 0xe7, 0x3d, 0x9a}}
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#define NS_VARIANT_CLASSNAME "Variant"
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