1 #region Copyright notice and license 2 // Protocol Buffers - Google's data interchange format 3 // Copyright 2008 Google Inc. All rights reserved. 4 // https://developers.google.com/protocol-buffers/ 5 // 6 // Redistribution and use in source and binary forms, with or without 7 // modification, are permitted provided that the following conditions are 8 // met: 9 // 10 // * Redistributions of source code must retain the above copyright 11 // notice, this list of conditions and the following disclaimer. 12 // * Redistributions in binary form must reproduce the above 13 // copyright notice, this list of conditions and the following disclaimer 14 // in the documentation and/or other materials provided with the 15 // distribution. 16 // * Neither the name of Google Inc. nor the names of its 17 // contributors may be used to endorse or promote products derived from 18 // this software without specific prior written permission. 19 // 20 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 21 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 23 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 24 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 25 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 26 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 30 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 #endregion 32 33 using System; 34 using System.Buffers; 35 using System.Buffers.Binary; 36 using System.Collections.Generic; 37 using System.IO; 38 using System.Runtime.CompilerServices; 39 using System.Runtime.InteropServices; 40 using System.Security; 41 using System.Text; 42 using Google.Protobuf.Collections; 43 44 namespace Google.Protobuf 45 { 46 47 // warning: this is a mutable struct, so it needs to be only passed as a ref! 48 internal struct ParserInternalState 49 { 50 // NOTE: the Span representing the current buffer is kept separate so that this doesn't have to be a ref struct and so it can 51 // be included in CodedInputStream's internal state 52 53 /// <summary> 54 /// The position within the current buffer (i.e. the next byte to read) 55 /// </summary> 56 internal int bufferPos; 57 58 /// <summary> 59 /// Size of the current buffer 60 /// </summary> 61 internal int bufferSize; 62 63 /// <summary> 64 /// If we are currently inside a length-delimited block, this is the number of 65 /// bytes in the buffer that are still available once we leave the delimited block. 66 /// </summary> 67 internal int bufferSizeAfterLimit; 68 69 /// <summary> 70 /// The absolute position of the end of the current length-delimited block (including totalBytesRetired) 71 /// </summary> 72 internal int currentLimit; 73 74 /// <summary> 75 /// The total number of consumed before the start of the current buffer. The 76 /// total bytes read up to the current position can be computed as 77 /// totalBytesRetired + bufferPos. 78 /// </summary> 79 internal int totalBytesRetired; 80 81 internal int recursionDepth; // current recursion depth 82 83 internal SegmentedBufferHelper segmentedBufferHelper; 84 85 /// <summary> 86 /// The last tag we read. 0 indicates we've read to the end of the stream 87 /// (or haven't read anything yet). 88 /// </summary> 89 internal uint lastTag; 90 91 /// <summary> 92 /// The next tag, used to store the value read by PeekTag. 93 /// </summary> 94 internal uint nextTag; 95 internal bool hasNextTag; 96 97 // these fields are configuration, they should be readonly 98 internal int sizeLimit; 99 internal int recursionLimit; 100 101 // If non-null, the top level parse method was started with given coded input stream as an argument 102 // which also means we can potentially fallback to calling MergeFrom(CodedInputStream cis) if needed. 103 internal CodedInputStream CodedInputStream => segmentedBufferHelper.CodedInputStream; 104 105 /// <summary> 106 /// Internal-only property; when set to true, unknown fields will be discarded while parsing. 107 /// </summary> 108 internal bool DiscardUnknownFields { get; set; } 109 110 /// <summary> 111 /// Internal-only property; provides extension identifiers to compatible messages while parsing. 112 /// </summary> 113 internal ExtensionRegistry ExtensionRegistry { get; set; } 114 } 115 }