static int Main(string[] args)
{
String command = null;
List <String> scriptFilename = new List <String>();
bool showUsage = false;
bool nonDebugNonGuiExitOnError = false;
bool showIncludes = false;
int errorCode = 0; // 0==success, the return value
PrintVersion();
ParseArguments(args,
out command, out scriptFilename, out showUsage,
out nonDebugNonGuiExitOnError, out showIncludes, out errorCode);
if (showUsage)
{
PrintUsage();
return(errorCode);
}
TextReader reader;
bool showPrompt;
bool readFromConsole;
errorCode = DetermineAndOpenInputSource(command, scriptFilename,
out reader, out showPrompt, out readFromConsole);
if (errorCode != 0)
{
return(errorCode);
}
GrShell shell = new GrShell(reader);
GrShellImpl shellImpl = new GrShellImpl();
IGrShellImplForDriver impl = shellImpl;
GrShellDriver driver = new GrShellDriver(shell, impl);
shell.SetImpl(shellImpl);
shell.SetDriver(driver);
driver.tokenSources.Push(shell.token_source);
driver.showIncludes = showIncludes;
impl.nonDebugNonGuiExitOnError = nonDebugNonGuiExitOnError;
try
{
driver.conditionalEvaluationResults.Push(true);
while (!driver.Quitting && !driver.Eof)
{
driver.ShowPromptAsNeeded(showPrompt);
bool success = shell.ParseShellCommand();
errorCode = HandleEofOrErrorIfNonConsoleShell(scriptFilename, success, nonDebugNonGuiExitOnError,
shell, driver,
ref reader, ref showPrompt, ref readFromConsole);
if (errorCode != 0)
{
return(errorCode);
}
}
driver.conditionalEvaluationResults.Pop();
}
catch (Exception e)
{
Console.WriteLine("exit due to " + e.Message);
errorCode = -2;
}
finally
{
impl.Cleanup();
}
return(errorCode);
}
public bool Include(String filename, String from, String to)
{
try
{
if (showIncludes)
{
impl.debugOut.WriteLine("Including " + filename);
}
TextReader reader = null;
if (filename.EndsWith(".gz", StringComparison.InvariantCultureIgnoreCase))
{
FileStream filereader = new FileStream(filename, FileMode.Open, FileAccess.Read);
reader = new StreamReader(new GZipStream(filereader, CompressionMode.Decompress));
}
else
{
reader = new StreamReader(filename);
}
if (from != null || to != null)
{
reader = new FromToReader(reader, from, to);
}
using (reader)
{
SimpleCharStream charStream = new SimpleCharStream(reader);
GrShellTokenManager tokenSource = new GrShellTokenManager(charStream);
tokenSources.Push(tokenSource);
try
{
grShell.ReInit(tokenSource);
while (!Quitting && !Eof)
{
if (!grShell.ParseShellCommand())
{
impl.errOut.WriteLine("Shell command parsing failed in include of \"" + filename + "\" (at nesting level " + tokenSources.Count + ")");
return(false);
}
}
Eof = false;
}
finally
{
if (showIncludes)
{
impl.debugOut.WriteLine("Leaving " + filename);
}
tokenSources.Pop();
grShell.ReInit(tokenSources.Peek());
}
}
}
catch (Exception e)
{
impl.errOut.WriteLine("Error during include of \"" + filename + "\": " + e.Message);
return(false);
}
return(true);
}
