private static object ResolveToken(TokenRef tokenRef, IReadOnlyList <Func <object> > values) { return(values[(int)(tokenRef.Family & ~TokenFamily.Reference) - ReservedTokenCount]()); }
public static bool CppStyleEvaluator(IProcessorState processor, ref int bufferLength, ref int currentBufferPosition) { TokenTrie trie = new TokenTrie(); //Logic trie.AddToken(processor.Encoding.GetBytes("&&"), 0); trie.AddToken(processor.Encoding.GetBytes("||"), 1); trie.AddToken(processor.Encoding.GetBytes("^"), 2); trie.AddToken(processor.Encoding.GetBytes("!"), 3); trie.AddToken(processor.Encoding.GetBytes(">"), 4); trie.AddToken(processor.Encoding.GetBytes(">="), 5); trie.AddToken(processor.Encoding.GetBytes("<"), 6); trie.AddToken(processor.Encoding.GetBytes("<="), 7); trie.AddToken(processor.Encoding.GetBytes("=="), 8); trie.AddToken(processor.Encoding.GetBytes("="), 9); trie.AddToken(processor.Encoding.GetBytes("!="), 10); //Bitwise trie.AddToken(processor.Encoding.GetBytes("&"), 11); trie.AddToken(processor.Encoding.GetBytes("|"), 12); trie.AddToken(processor.Encoding.GetBytes("<<"), 13); trie.AddToken(processor.Encoding.GetBytes(">>"), 14); //Braces trie.AddToken(processor.Encoding.GetBytes("("), 15); trie.AddToken(processor.Encoding.GetBytes(")"), 16); //Whitespace trie.AddToken(processor.Encoding.GetBytes(" "), 17); trie.AddToken(processor.Encoding.GetBytes("\t"), 18); //EOLs trie.AddToken(processor.Encoding.GetBytes("\r\n"), 19); trie.AddToken(processor.Encoding.GetBytes("\n"), 20); trie.AddToken(processor.Encoding.GetBytes("\r"), 21); //Tokens trie.Append(processor.EncodingConfig.Variables); //Run forward to EOL and collect args TokenFamily currentTokenFamily; List <byte> currentTokenBytes = new List <byte>(); List <TokenRef> tokens = new List <TokenRef>(); int token; if (!trie.GetOperation(processor.CurrentBuffer, bufferLength, ref currentBufferPosition, out token)) { currentTokenFamily = TokenFamily.Literal; currentTokenBytes.Add(processor.CurrentBuffer[currentBufferPosition++]); } else if (token > ReservedTokenMaxIndex) { currentTokenFamily = TokenFamily.Reference | (TokenFamily)token; tokens.Add(new TokenRef { Family = currentTokenFamily }); } else { currentTokenFamily = (TokenFamily)token; if (currentTokenFamily != TokenFamily.WindowsEOL && currentTokenFamily != TokenFamily.LegacyMacEOL && currentTokenFamily != TokenFamily.UnixEOL) { tokens.Add(new TokenRef { Family = currentTokenFamily }); } else { return(EvaluateCondition(tokens, processor.EncodingConfig.VariableValues)); } } int braceDepth = 0; if (tokens[0].Family == TokenFamily.OpenBrace) { ++braceDepth; } bool first = true; while ((first || braceDepth > 0) && bufferLength > 0) { int targetLen = Math.Min(bufferLength, trie.MaxLength); for (; currentBufferPosition < bufferLength - targetLen + 1;) { int oldBufferPos = currentBufferPosition; if (trie.GetOperation(processor.CurrentBuffer, bufferLength, ref currentBufferPosition, out token)) { if (braceDepth == 0) { switch (tokens[tokens.Count - 1].Family) { case TokenFamily.Whitespace: case TokenFamily.Tab: case TokenFamily.CloseBrace: case TokenFamily.WindowsEOL: case TokenFamily.UnixEOL: case TokenFamily.LegacyMacEOL: TokenFamily thisFamily = (TokenFamily)token; if (thisFamily == TokenFamily.WindowsEOL || thisFamily == TokenFamily.UnixEOL || thisFamily == TokenFamily.LegacyMacEOL) { currentBufferPosition = oldBufferPos; } break; default: currentBufferPosition = oldBufferPos; first = false; break; } if (!first) { break; } } //We matched an item, so whatever this is, it's not a literal, end the current literal if that's // what we currently have if (currentTokenFamily == TokenFamily.Literal) { string literal = processor.Encoding.GetString(currentTokenBytes.ToArray()); tokens.Add(new TokenRef { Family = TokenFamily.Literal, Literal = literal }); currentTokenBytes.Clear(); } //If we have a token from the args... if (token > ReservedTokenMaxIndex) { if (currentTokenFamily == TokenFamily.Literal) { TokenRef previous = tokens[tokens.Count - 1]; previous.Literal += processor.Encoding.GetString(currentTokenBytes.ToArray()); currentTokenBytes = processor.Encoding.GetBytes(previous.Literal).ToList(); tokens.RemoveAt(tokens.Count - 1); } else { currentTokenFamily = TokenFamily.Reference | (TokenFamily)token; tokens.Add(new TokenRef { Family = currentTokenFamily }); } } //If we have a normal token... else { currentTokenFamily = (TokenFamily)token; if (currentTokenFamily != TokenFamily.WindowsEOL && currentTokenFamily != TokenFamily.LegacyMacEOL && currentTokenFamily != TokenFamily.UnixEOL) { if (currentTokenFamily == TokenFamily.OpenBrace) { ++braceDepth; } else if (currentTokenFamily == TokenFamily.CloseBrace) { --braceDepth; } tokens.Add(new TokenRef { Family = currentTokenFamily }); } else { return(EvaluateCondition(tokens, processor.EncodingConfig.VariableValues)); } } } else if (braceDepth > 0) { currentTokenFamily = TokenFamily.Literal; currentTokenBytes.Add(processor.CurrentBuffer[currentBufferPosition++]); } else { first = false; break; } } processor.AdvanceBuffer(currentBufferPosition); currentBufferPosition = processor.CurrentBufferPosition; bufferLength = processor.CurrentBufferLength; } return(EvaluateCondition(tokens, processor.EncodingConfig.VariableValues)); }