public static Token ReadToken(LocatedTextReaderWrapper input)
{
input.SkipWhiteSpace();
int nextCharacterCode = input.Peek();
if(nextCharacterCode < 0) {
return null;
}
char nextCharacter = (char)nextCharacterCode;
var startLocation = input.Location.Clone();
Token token;
if(IsStringStart(nextCharacter)) {
token = ReadString(input);
} else if(IsNumberChar(nextCharacter)) {
token = ReadNumber(input);
} else if(IsIdentifierStart(nextCharacter)) {
token = ReadIdentifier(input);
} else if(IsSymbolChar(nextCharacter)) {
token = ReadSymbol(input);
} else {
throw new BadDataException("Unknown token starting with " + nextCharacter, startLocation);
}
token.Location = startLocation;
return token;
}
private void osq2osb_Click(object sender, EventArgs e)
{
using(var reader = new LocatedTextReaderWrapper(osqScript.Text)) {
reverser.Parser.InputReader = reader;
osbScript.Text = reverser.Encode();
}
osb2osq.Enabled = true;
}
static void Main(string[] args)
{
if(args.Length == 0) {
Console.WriteLine("Parsing from console...");
var executionContext = new ExecutionContext();
while(true) {
try {
using(var console = Console.OpenStandardInput())
using(var reader = new LocatedTextReaderWrapper(console)) {
var parser = new Parser(reader);
foreach(var node in parser.ReadNodes()) {
string output = node.Execute(executionContext);
Console.Write(output);
}
}
} catch(Exception e) {
Console.WriteLine("Error: " + e);
}
}
} else {
watchers = new Dictionary<FileCollectionWatcher, string>();
foreach(var filename in args) {
var watcher = new FileCollectionWatcher();
watcher.Changed += FileChanged;
watchers[watcher] = filename;
ParseFile(watcher, filename);
Console.WriteLine("Watching " + filename + " for changes...");
}
Thread.Sleep(-1);
}
}
private static void ParseFile(FileCollectionWatcher watcher, string filename)
{
Console.Write("Parsing " + filename + "...");
using(var inputFile = File.Open(filename, FileMode.Open, FileAccess.Read))
using(var outputFile = File.Open(Path.Combine(Path.GetDirectoryName(filename), Path.GetFileNameWithoutExtension(filename)) + ".osb", FileMode.Create, FileAccess.Write)) {
var executionContext = new ExecutionContext();
using(var reader = new LocatedTextReaderWrapper(inputFile, new Location(filename)))
using(var writer = new StreamWriter(outputFile)) {
try {
var parser = new Parser(reader);
foreach(var node in parser.ReadNodes()) {
string output = node.Execute(executionContext);
writer.Write(output);
}
watcher.Clear();
} catch(Exception e) {
Console.WriteLine("\nError: " + e);
return;
} finally {
if(!watcher.Contains(filename)) {
watcher.Add(filename);
}
foreach(string file in executionContext.Dependencies.Where((file) => !watcher.Contains(file))) {
watcher.Add(file);
}
}
}
}
Console.WriteLine(" Done!");
}
/// <summary>
/// Initializes a new instance of the <see cref="Encoder"/> class with sensible defaults.
/// </summary>
/// <param name="reader">The reader.</param>
/// <remarks>The <see cref="Encoder"/> instance created is readily usable with a default <see cref="Parser"/> and <see cref="ExecutionContext"/>.</remarks>
public Encoder(LocatedTextReaderWrapper reader)
{
Parser = new Parser.Parser(reader);
ExecutionContext = new ExecutionContext();
}
/// <summary>
/// Transforms the osq script into an osb script.
/// </summary>
/// <returns>The osb script.</returns>
public string Encode()
{
if(ExecutionContext == null) {
throw new InvalidOperationException("ExecutionContext must not be null");
}
if(Parser == null) {
throw new InvalidOperationException("Parser must not be null");
}
scriptNodes = new List<ConvertedNode>();
var output = new StringBuilder();
using(var bufferingReader = new BufferingTextReaderWrapper(Parser.InputReader))
using(var myReader = new LocatedTextReaderWrapper(bufferingReader, Parser.InputReader.Location.Clone())) { // Sorry we have to do this...
var parser = new Parser.Parser(Parser, myReader);
NodeBase node;
while((node = parser.ReadNode()) != null) {
string curOutput = node.Execute(ExecutionContext);
output.Append(curOutput);
var converted = new ConvertedNode {
Node = node,
NodeOutput = curOutput,
OriginalScript = bufferingReader.BufferedText
};
scriptNodes.Add(converted);
bufferingReader.ClearBuffer();
}
}
return output.ToString();
}
/// <summary>
/// Initializes a new instance of the <see cref="Parser"/> class.
/// </summary>
/// <param name="reader">The reader with which to parse.</param>
public Parser(LocatedTextReaderWrapper reader)
{
InputReader = reader;
}
/// <summary>
/// Initializes a new instance of the <see cref="Parser"/> class given a <see cref="Parser"/> to model after and a new reader.
/// </summary>
/// <param name="other">Parser to copy the options from.</param>
/// <param name="newReader">The new reader.</param>
public Parser(Parser other, LocatedTextReaderWrapper newReader)
: this(other)
{
InputReader = newReader;
}
public static IEnumerable<Token> ReadTokens(LocatedTextReaderWrapper input)
{
Token curToken;
while((curToken = ReadToken(input)) != null) {
yield return curToken;
}
}
private static Token ReadString(LocatedTextReaderWrapper input)
{
var str = new StringBuilder();
input.Read(); // Consume ".
while(true) {
int rawChar = input.Read();
if(rawChar < 0) {
throw new MissingDataException("End-of-string terminator", input.Location);
}
char nextCharacter = (char)rawChar;
if(nextCharacter == '"') {
break;
}
if(nextCharacter == '\\') {
nextCharacter = ReadEscapeCode(input);
}
str.Append(nextCharacter);
}
return new Token(TokenType.String, str.ToString());
}
private static Token ReadSymbol(LocatedTextReaderWrapper input)
{
var curToken = "";
while(input.Peek() >= 0) {
char nextCharacter = (char)input.Peek();
if(!IsSymbolChar(nextCharacter)) {
break;
}
string newToken = curToken + nextCharacter;
if(!IsSymbolStart(newToken)) {
break;
}
curToken = newToken;
input.Read(); // Discard.
}
return new Token(TokenType.Symbol, curToken);
}
private static Token ReadNumber(LocatedTextReaderWrapper input)
{
var startLocation = input.Location.Clone();
var numberString = new StringBuilder();
while(IsNumberChar((char)input.Peek())) {
numberString.Append((char)input.Read());
}
double number;
if(!double.TryParse(numberString.ToString(), NumberStyles.AllowDecimalPoint | NumberStyles.AllowLeadingSign, Parser.DefaultCulture, out number)) {
throw new BadDataException("Number", startLocation);
}
return new Token(TokenType.Number, number);
}
private static Token ReadIdentifier(LocatedTextReaderWrapper input)
{
var token = new StringBuilder();
while(input.Peek() >= 0) {
char nextCharacter = (char)input.Peek();
if(!IsIdentifierChar(nextCharacter)) {
break;
}
token.Append(nextCharacter);
input.Read(); // Discard.
}
return new Token(TokenType.Identifier, token.ToString());
}
private static char ReadEscapeCode(LocatedTextReaderWrapper input)
{
int nextCharacter = input.Read();
if(nextCharacter < 0) {
throw new MissingDataException("Code following \\", input.Location);
}
switch((char)nextCharacter) {
case 'n':
return '\n';
case 't':
return '\t';
case 'r':
return '\r';
case '\\':
return '\\';
case '"':
return '"';
default:
var e = new BadDataException("Unknown escape character", input.Location);
e.Data["character"] = (char)nextCharacter;
throw e;
}
}
/// <summary>
/// Initializes a new instance of the <see cref="Encoder"/> class.
/// </summary>
/// <param name="reader">The reader.</param>
/// <param name="context">The execution context.</param>
public Encoder(LocatedTextReaderWrapper reader, ExecutionContext context)
: this(new Parser(reader), context)
{
}
/// <summary>
/// Initializes a new instance of the <see cref="Encoder"/> class.
/// </summary>
/// <param name="reader">The reader.</param>
public Encoder(LocatedTextReaderWrapper reader)
: this(new Parser(reader))
{
}
