/* * Copyright (c) 2000-2001,2003-2004 Apple Computer, Inc. All Rights Reserved. * * @APPLE_LICENSE_HEADER_START@ * * Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved. * * This file contains Original Code and/or Modifications of Original Code * as defined in and that are subject to the Apple Public Source License * Version 2.0 (the 'License'). You may not use this file except in * compliance with the License. Please obtain a copy of the License at * http://www.opensource.apple.com/apsl/ and read it before using this * file. * * The Original Code and all software distributed under the License are * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. * Please see the License for the specific language governing rights and * limitations under the License. * * @APPLE_LICENSE_HEADER_END@ */ // // constdata - shared constant binary data objects // #ifndef _H_CONSTDATA #define _H_CONSTDATA #include #include namespace Security { // // ConstData represents a contiguous, binary blob of constant data. // Assignment is by sharing (thus cheap). // ConstData is a (constant) Dataoid type. // class ConstData { private: class Blob : public RefCount { public: Blob() : mData(NULL), mSize(0) { } Blob(const void *base, size_t size, bool takeOwnership = false); ~Blob() { delete[] reinterpret_cast(mData); } const void *data() const { return mData; } size_t length() const { return mSize; } private: const void *mData; size_t mSize; }; public: ConstData() { } //@@@ use a nullBlob? ConstData(const void *base, size_t size, bool takeOwnership = false) : mBlob(new Blob(base, size, takeOwnership)) { } template static ConstData wrap(const T &obj, bool takeOwnership) { return ConstData(&obj, sizeof(obj), takeOwnership); } public: const void *data() const { return mBlob ? mBlob->data() : NULL; } size_t length() const { return mBlob ? mBlob->length() : 0; } operator bool() const { return mBlob; } bool operator !() const { return !mBlob; } template operator const T *() const { return reinterpret_cast(data()); } template const T &as() const { return *static_cast(reinterpret_cast(data())); } private: RefPointer mBlob; }; } // end namespace Security #endif //_H_CONSTDATA