1 /* 2 * Copyright (C) 2009 Apple Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 #ifndef BinaryPropertyList_h 27 #define BinaryPropertyList_h 28 29 #include <wtf/Vector.h> 30 31 namespace WebCore { 32 33 class String; 34 35 // Writes a limited subset of binary property lists. 36 // Covers only what's needed for writing browser history as of this writing. 37 class BinaryPropertyListObjectStream { 38 public: 39 // Call writeBooleanTrue to write the boolean true value. 40 // A single shared object will be used in the serialized list. 41 virtual void writeBooleanTrue() = 0; 42 43 // Call writeInteger to write an integer value. 44 // A single shared object will be used for each integer in the serialized list. 45 virtual void writeInteger(int) = 0; 46 47 // Call writeString to write a string value. 48 // A single shared object will be used for each string in the serialized list. 49 virtual void writeString(const String&) = 0; 50 51 // Call writeUniqueString instead of writeString when it's unlikely the 52 // string will be written twice in the same property list; this saves hash 53 // table overhead for such strings. A separate object will be used for each 54 // of these strings in the serialized list. 55 virtual void writeUniqueString(const String&) = 0; 56 virtual void writeUniqueString(const char*) = 0; 57 58 // Call writeIntegerArray instead of writeArrayStart/writeArrayEnd for 59 // arrays entirely composed of integers. A single shared object will be used 60 // for each identical array in the serialized list. Warning: The integer 61 // pointer must remain valid until the writeBinaryPropertyList function 62 // returns, because these lists are put into a hash table without copying 63 // them -- that's OK if the client already has a Vector<int>. 64 virtual void writeIntegerArray(const int*, size_t) = 0; 65 66 // After calling writeArrayStart, write array elements. 67 // Then call writeArrayEnd, passing in the result from writeArrayStart. 68 // A separate object will be used for each of these arrays in the serialized list. 69 virtual size_t writeArrayStart() = 0; 70 virtual void writeArrayEnd(size_t resultFromWriteArrayStart) = 0; 71 72 // After calling writeDictionaryStart, write all keys, then all values. 73 // Then call writeDictionaryEnd, passing in the result from writeDictionaryStart. 74 // A separate object will be used for each dictionary in the serialized list. 75 virtual size_t writeDictionaryStart() = 0; 76 virtual void writeDictionaryEnd(size_t resultFromWriteDictionaryStart) = 0; 77 78 protected: ~BinaryPropertyListObjectStream()79 virtual ~BinaryPropertyListObjectStream() { } 80 }; 81 82 class BinaryPropertyListWriter { 83 public: 84 // Calls writeObjects once to prepare for writing and determine how big a 85 // buffer is required. Then calls buffer to get the appropriately-sized 86 // buffer, then calls writeObjects a second time and writes the property list. 87 void writePropertyList(); 88 89 protected: ~BinaryPropertyListWriter()90 virtual ~BinaryPropertyListWriter() { } 91 92 private: 93 // Called by writePropertyList. 94 // Must call the object stream functions for the objects to be written 95 // into the property list. 96 virtual void writeObjects(BinaryPropertyListObjectStream&) = 0; 97 98 // Called by writePropertyList. 99 // Returns the buffer that the writer should write into. 100 virtual UInt8* buffer(size_t) = 0; 101 102 friend class BinaryPropertyListPlan; 103 friend class BinaryPropertyListSerializer; 104 }; 105 106 } 107 108 #endif 109