コード例 #1
0
        private IEnumerable <FileLine> Prepocess()
        {
            string s;

newLine:
            while ((s = reader.ReadLine()) != null)
            {
                var ss = s;
                lineNumber++;
                if (!insideComment)
                {
                    var idx = s.IndexOf("/*");
                    if (idx > -1)
                    {
                        ss            = s.Substring(0, idx);
                        insideComment = true;
                    }
                }
                else
                {
                    var idx = s.IndexOf("*/");
                    if (idx > -1)
                    {
                        ss            = s.Substring(idx + 2);
                        insideComment = false;
                    }
                    else
                    {
                        continue;
                    }
                }

                var commentIdx = ss.IndexOf("//");
                if (commentIdx > -1)
                {
                    ss = ss.Substring(0, commentIdx);
                }

                if (ss.Trim().StartsWith("#"))
                {
                    ss = ss.TrimStart();
                    //Parse preprocessor
                    if (ss.Trim() == "#endif")
                    {
                        supress = false;
                        wasIf   = false;
                    }
                    if (ss.Trim() == "#else")
                    {
                        if (wasIf)
                        {
                            supress = !supress;
                        }
                        else
                        {
                            throw new FormatException(string.Format("Unmatched #else in {0} line {1}", fileName, lineNumber));
                        }
                    }
                    if (supress)
                    {
                        goto newLine;
                    }


                    if (ss.StartsWith("#ifdef"))
                    {
                        var m = s.Substring("#ifdef".Length + 1);
                        supress = !macros.ContainsKey(m);
                        wasIf   = true;
                    }

                    if (ss.StartsWith("#ifndef"))
                    {
                        var m = s.Substring("#ifndef".Length + 1);
                        supress = macros.ContainsKey(m);
                        wasIf   = true;
                    }

                    if (ss.StartsWith("#undef"))
                    {
                        var m = s.Substring("#undef".Length + 1);
                        macros.Remove(m);
                    }

                    if (ss.StartsWith("#define"))
                    {
                        var macro = new MacroDef
                        {
                            Line = lineNumber,
                            File = fileName
                        };

                        var block = ss.Substring("#define".Length + 1);

                        while (block.EndsWith("\\"))
                        {
                            ss    = reader.ReadLine();
                            block = block.TrimEnd('\\') + ss;
                            lineNumber++;
                        }
                        var m = defineParser.Match(block);
                        if (!m.Success)
                        {
                            throw new FormatException(string.Format("Error parsing define at {0} line {1}", fileName, lineNumber));
                        }

                        macro.Name       = m.Groups["name"].Value;
                        macro.Body       = m.Groups["body"].Value;
                        macro.Parameters = m.Groups["params"].Value.Split(',').Select(p => p.Trim()).Where(p => !string.IsNullOrEmpty(p)).ToArray();
                        macro.Prepare();
                        macros[macro.Name] = macro;
                    }

                    if (ss.StartsWith("#include"))
                    {
                        var f = ss.Substring("#include".Length + 1).Trim('"', ' ', '<', '>');
                        var l = lookupFile(fileName, f);
                        var p = new Preprocessor(l.Item1, l.Item2, lookupFile, macros);
                        foreach (var x in p.Prepocess())
                        {
                            yield return(x);
                        }
                    }
                    continue;
                }
                if (supress)
                {
                    goto newLine;
                }
                if (s.Length > 0)
                {
                    yield return(new FileLine(fileName, lineNumber, PreprocessLine(s)));
                }
            }
        }
コード例 #2
0
        public static IEnumerable <FileLine> Prepocess(string fileName, TextReader reader, Func <string, string, Tuple <string, TextReader> > lookupFile)
        {
            var p = new Preprocessor(fileName, reader, lookupFile, new Dictionary <string, MacroDef>());

            return(p.Prepocess());
        }