///////////////////////////////////////////////////////////////////////
public static bool HasFlags(
MapOpenAccess access,
MapOpenAccess flags,
bool all
)
{
if (all)
{
return((access & flags) == flags);
}
else
{
return((access & flags) != MapOpenAccess.Default);
}
}
public override ReturnCode Execute(
Interpreter interpreter,
IClientData clientData,
ArgumentList arguments,
ref Result result
)
{
ReturnCode code = ReturnCode.Ok;
if (interpreter != null)
{
if (arguments != null)
{
if (arguments.Count >= 2)
{
string fileName = arguments[1];
if (interpreter.HasChannels(ref result))
{
MapOpenAccess access = MapOpenAccess.Default;
int permissions = 0; // NOTE: This is ONLY parsed, NOT used for opening the file.
string type = null;
if (arguments.Count >= 3)
{
Result enumString = arguments[2];
if (!String.IsNullOrEmpty(enumString))
{
//
// HACK: Translate illegal mode char "+" to what our Enum uses.
// This strategy will backfire later if we ever decide to
// allow parsing of the access mode as "flags" (via GetOptions).
//
enumString = enumString.Replace(Characters.PlusSign.ToString(), "Plus");
}
code = StringOps.StringToEnumList(interpreter, enumString, ref enumString);
if (code == ReturnCode.Ok)
{
object enumValue = EnumOps.TryParseEnum(
typeof(MapOpenAccess), enumString,
true, true);
if (enumValue is MapOpenAccess)
{
access = (MapOpenAccess)enumValue;
}
else
{
enumString = ScriptOps.BadValue(
"invalid", "access mode", arguments[2],
Enum.GetNames(typeof(MapOpenAccess)), null, null);
code = ReturnCode.Error;
}
}
if (code != ReturnCode.Ok)
{
//
// NOTE: Transfer local result from above and add to the error info.
//
result = enumString;
Engine.AddErrorInformation(interpreter, result,
String.Format("{0} while processing open access modes \"{1}\"",
Environment.NewLine, FormatOps.Ellipsis(arguments[2])));
}
}
if ((code == ReturnCode.Ok) && (arguments.Count >= 4))
{
code = Value.GetInteger2(
(IGetValue)arguments[3], ValueFlags.AnyInteger,
interpreter.CultureInfo, ref permissions, ref result);
}
if (code == ReturnCode.Ok)
{
if (arguments.Count >= 5)
{
type = arguments[4];
}
OptionDictionary options = new OptionDictionary(
new IOption[] {
#if CONSOLE
new Option(null, OptionFlags.None, 1, Index.Invalid, "-stdin", null),
new Option(null, OptionFlags.None, 1, Index.Invalid, "-stdout", null),
new Option(null, OptionFlags.None, 1, Index.Invalid, "-stderr", null),
#else
new Option(null, OptionFlags.Unsupported, 1, Index.Invalid, "-stdin", null),
new Option(null, OptionFlags.Unsupported, 1, Index.Invalid, "-stdout", null),
new Option(null, OptionFlags.Unsupported, 1, Index.Invalid, "-stderr", null),
#endif
new Option(null, OptionFlags.MustHaveValue, Index.Invalid, Index.Invalid, "-channelid", null),
new Option(null, OptionFlags.MustHaveIntegerValue, Index.Invalid, Index.Invalid, "-buffersize", null),
new Option(null, OptionFlags.None, Index.Invalid, Index.Invalid, "-autoflush", null),
new Option(typeof(HostStreamFlags), OptionFlags.MustHaveEnumValue, Index.Invalid, Index.Invalid, "-streamflags",
new Variant(HostStreamFlags.Default)),
new Option(typeof(FileOptions), OptionFlags.MustHaveEnumValue, Index.Invalid, Index.Invalid, "-options",
new Variant(FileOptions.None)),
new Option(typeof(FileShare), OptionFlags.MustHaveEnumValue, Index.Invalid, Index.Invalid, "-share",
new Variant(FileShare.Read))
});
int argumentIndex = Index.Invalid;
if (arguments.Count > 5)
{
code = interpreter.GetOptions(options, arguments, 0, 5, Index.Invalid, true, ref argumentIndex, ref result);
}
else
{
code = ReturnCode.Ok;
}
if (code == ReturnCode.Ok)
{
if (argumentIndex == Index.Invalid)
{
Variant value = null;
string channelId = null;
if (options.IsPresent("-channelid", ref value))
{
channelId = value.ToString();
}
if ((channelId == null) ||
(interpreter.DoesChannelExist(channelId) != ReturnCode.Ok))
{
#if CONSOLE
if (options.IsPresent("-stdin"))
{
//
// NOTE: Enforce the proper access for the standard input
// channel.
//
if (access == MapOpenAccess.RdOnly)
{
try
{
IStreamHost streamHost = interpreter.Host;
//
// NOTE: *WARNING* This option causes the "fileName",
// "access", "permissions", and "type" arguments
// to be ignored.
//
lock (interpreter.SyncRoot) /* TRANSACTIONAL */
{
if (streamHost.In == null)
{
int?bufferSize = null;
if (options.IsPresent("-buffersize", ref value))
{
bufferSize = (int)value.Value;
}
streamHost.In = (bufferSize != null) ?
Console.OpenStandardInput((int)bufferSize) :
Console.OpenStandardInput();
}
}
code = interpreter.ModifyStandardChannels(
streamHost, channelId, ChannelType.Input |
ChannelType.ErrorOnExist, ref result);
if (code == ReturnCode.Ok)
{
result = (channelId != null) ? channelId : StandardChannel.Input;
}
}
catch (Exception e)
{
Engine.SetExceptionErrorCode(interpreter, e);
result = e;
code = ReturnCode.Error;
}
}
else
{
result = String.Format(
"illegal access mode \"{0}\", standard input " +
"can only be opened using access mode \"{1}\"",
access, MapOpenAccess.RdOnly);
code = ReturnCode.Error;
}
}
else if (options.IsPresent("-stdout"))
{
//
// NOTE: Enforce the proper access for the standard output
// channel.
//
if (access == MapOpenAccess.WrOnly)
{
try
{
IStreamHost streamHost = interpreter.Host;
//
// NOTE: *WARNING* This option causes the "fileName",
// "access", "permissions", and "type" arguments
// to be ignored.
//
lock (interpreter.SyncRoot) /* TRANSACTIONAL */
{
if (streamHost.Out == null)
{
int?bufferSize = null;
if (options.IsPresent("-buffersize", ref value))
{
bufferSize = (int)value.Value;
}
streamHost.Out = (bufferSize != null) ?
Console.OpenStandardOutput((int)bufferSize) :
Console.OpenStandardOutput();
}
}
code = interpreter.ModifyStandardChannels(
streamHost, channelId, ChannelType.Output |
ChannelType.ErrorOnExist, ref result);
if (code == ReturnCode.Ok)
{
result = (channelId != null) ? channelId : StandardChannel.Output;
}
}
catch (Exception e)
{
Engine.SetExceptionErrorCode(interpreter, e);
result = e;
code = ReturnCode.Error;
}
}
else
{
result = String.Format(
"illegal access mode \"{0}\", standard output " +
"can only be opened using access mode \"{1}\"",
access, MapOpenAccess.WrOnly);
code = ReturnCode.Error;
}
}
else if (options.IsPresent("-stderr"))
{
//
// NOTE: Enforce the proper access for the standard error
// channel.
//
if (access == MapOpenAccess.WrOnly)
{
try
{
IStreamHost streamHost = interpreter.Host;
//
// NOTE: *WARNING* This option causes the "fileName",
// "access", "permissions", and "type" arguments
// to be ignored.
//
lock (interpreter.SyncRoot) /* TRANSACTIONAL */
{
if (streamHost.Error == null)
{
int?bufferSize = null;
if (options.IsPresent("-buffersize", ref value))
{
bufferSize = (int)value.Value;
}
streamHost.Error = (bufferSize != null) ?
Console.OpenStandardError((int)bufferSize) :
Console.OpenStandardError();
}
}
code = interpreter.ModifyStandardChannels(
streamHost, channelId, ChannelType.Error |
ChannelType.ErrorOnExist, ref result);
if (code == ReturnCode.Ok)
{
result = (channelId != null) ? channelId : StandardChannel.Error;
}
}
catch (Exception e)
{
Engine.SetExceptionErrorCode(interpreter, e);
result = e;
code = ReturnCode.Error;
}
}
else
{
result = String.Format(
"illegal access mode \"{0}\", standard error " +
"can only be opened using access mode \"{1}\"",
access, MapOpenAccess.WrOnly);
code = ReturnCode.Error;
}
}
else
#endif
{
Stream stream = null;
bool autoFlush = false;
switch (type)
{
case null: /* FALL-THROUGH */
case /* String.Empty */ "": /* FALL-THROUGH */
case "file":
{
try
{
HostStreamFlags hostStreamFlags = HostStreamFlags.OpenCommand;
FileAccess fileAccess = FileOps.FileAccessFromAccess(access);
FileMode fileMode = FileOps.FileModeFromAccess(access);
FileShare fileShare = FileShare.Read;
if (options.IsPresent("-streamflags", ref value))
{
hostStreamFlags = (HostStreamFlags)value.Value;
}
if (options.IsPresent("-share", ref value))
{
fileShare = (FileShare)value.Value;
}
int bufferSize = Channel.DefaultBufferSize;
if (options.IsPresent("-buffersize", ref value))
{
bufferSize = (int)value.Value;
}
FileOptions fileOptions = FileOptions.None;
if (options.IsPresent("-options", ref value))
{
fileOptions = (FileOptions)value.Value;
}
if (options.IsPresent("-autoflush"))
{
autoFlush = true;
}
bool seekToEof = false;
//
// HACK: Check for special case where they want to Append
// and Read/ReadWrite.
//
if (((fileAccess == FileAccess.Read) ||
(fileAccess == FileAccess.ReadWrite)) &&
(FlagOps.HasFlags(access, MapOpenAccess.SeekToEof, true) ||
FlagOps.HasFlags(access, MapOpenAccess.Append, true)))
{
seekToEof = true;
}
code = interpreter.GetStream(
fileName, fileMode, fileAccess, fileShare, bufferSize,
fileOptions, Channel.StrictGetStream, ref hostStreamFlags,
ref stream, ref result);
if (code == ReturnCode.Ok)
{
if ((stream != null) && seekToEof)
{
stream.Seek(0, SeekOrigin.End);
}
}
}
catch (Exception e)
{
Engine.SetExceptionErrorCode(interpreter, e);
result = e;
code = ReturnCode.Error;
}
break;
}
default:
{
result = String.Format(
"unsupported channel type \"{0}\"",
type);
code = ReturnCode.Error;
break;
}
}
//
// NOTE: Did we manage to open the file successfully?
//
if (code == ReturnCode.Ok)
{
StreamFlags flags = StreamFlags.PreventClose;
if (channelId == null)
{
channelId = FormatOps.Id("file", null, interpreter.NextId());
}
code = interpreter.AddFileOrSocketChannel(
channelId, stream, options, flags,
FlagOps.HasFlags(access, MapOpenAccess.Append, true),
autoFlush, null, ref result);
if (code == ReturnCode.Ok)
{
result = channelId;
}
}
}
}
else
{
result = String.Format(
"can't add \"{0}\": channel already exists",
channelId);
code = ReturnCode.Error;
}
}
else
{
result = "wrong # args: should be \"open fileName ?access? ?permissions? ?type? ?options?\"";
code = ReturnCode.Error;
}
}
}
}
else
{
code = ReturnCode.Error;
}
}
else
{
result = "wrong # args: should be \"open fileName ?access? ?permissions? ?type? ?options?\"";
code = ReturnCode.Error;
}
}
else
{
result = "invalid argument list";
code = ReturnCode.Error;
}
}
else
{
result = "invalid interpreter";
code = ReturnCode.Error;
}
return(code);
}