tclcmdah.c

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		Tcl_SetStringObj(Tcl_GetObjResult(interp),
			Tcl_DStringValue(&ds), Tcl_DStringLength(&ds));
		Tcl_DStringFree(&ds);
	    } else {
		/*
		 * Store the result as binary data.
		 */

		string = Tcl_GetStringFromObj(data, &length);
		Tcl_UtfToExternalDString(encoding, string, length, &ds);
		resultPtr = Tcl_GetObjResult(interp);
		Tcl_SetByteArrayObj(resultPtr, 
			(unsigned char *) Tcl_DStringValue(&ds),
			Tcl_DStringLength(&ds));
		Tcl_DStringFree(&ds);
	    }

	    Tcl_FreeEncoding(encoding);
	    break;
	}
	case ENC_NAMES: {
	    if (objc > 2) {
		Tcl_WrongNumArgs(interp, 2, objv, NULL);
		return TCL_ERROR;
	    }
	    Tcl_GetEncodingNames(interp);
	    break;
	}
	case ENC_SYSTEM: {
	    if (objc > 3) {
		Tcl_WrongNumArgs(interp, 2, objv, "?encoding?");
		return TCL_ERROR;
	    }
	    if (objc == 2) {
		Tcl_SetStringObj(Tcl_GetObjResult(interp),
			Tcl_GetEncodingName(NULL), -1);
	    } else {
	        return Tcl_SetSystemEncoding(interp,
			Tcl_GetStringFromObj(objv[2], NULL));
	    }
	    break;
	}
    }
    return TCL_OK;
}

/*
 *----------------------------------------------------------------------
 *
 * Tcl_ErrorObjCmd --
 *
 *	This procedure is invoked to process the "error" Tcl command.
 *	See the user documentation for details on what it does.
 *
 * Results:
 *	A standard Tcl object result.
 *
 * Side effects:
 *	See the user documentation.
 *
 *----------------------------------------------------------------------
 */

	/* ARGSUSED */
int
Tcl_ErrorObjCmd(dummy, interp, objc, objv)
    ClientData dummy;		/* Not used. */
    Tcl_Interp *interp;		/* Current interpreter. */
    int objc;			/* Number of arguments. */
    Tcl_Obj *CONST objv[];	/* Argument objects. */
{
    Interp *iPtr = (Interp *) interp;
    char *info;
    int infoLen;

    if ((objc < 2) || (objc > 4)) {
	Tcl_WrongNumArgs(interp, 1, objv, "message ?errorInfo? ?errorCode?");
	return TCL_ERROR;
    }
    
    if (objc >= 3) {		/* process the optional info argument */
	info = Tcl_GetStringFromObj(objv[2], &infoLen);
	if (*info != 0) {
	    Tcl_AddObjErrorInfo(interp, info, infoLen);
	    iPtr->flags |= ERR_ALREADY_LOGGED;
	}
    }
    
    if (objc == 4) {
	Tcl_SetVar2Ex(interp, "errorCode", NULL, objv[3], TCL_GLOBAL_ONLY);
	iPtr->flags |= ERROR_CODE_SET;
    }
    
    Tcl_SetObjResult(interp, objv[1]);
    return TCL_ERROR;
}

/*
 *----------------------------------------------------------------------
 *
 * Tcl_EvalObjCmd --
 *
 *	This object-based procedure is invoked to process the "eval" Tcl 
 *	command. See the user documentation for details on what it does.
 *
 * Results:
 *	A standard Tcl object result.
 *
 * Side effects:
 *	See the user documentation.
 *
 *----------------------------------------------------------------------
 */

	/* ARGSUSED */
int
Tcl_EvalObjCmd(dummy, interp, objc, objv)
    ClientData dummy;		/* Not used. */
    Tcl_Interp *interp;		/* Current interpreter. */
    int objc;			/* Number of arguments. */
    Tcl_Obj *CONST objv[];	/* Argument objects. */
{
    int result;
    register Tcl_Obj *objPtr;

    if (objc < 2) {
	Tcl_WrongNumArgs(interp, 1, objv, "arg ?arg ...?");
	return TCL_ERROR;
    }
    
    if (objc == 2) {
	result = Tcl_EvalObjEx(interp, objv[1], TCL_EVAL_DIRECT);
    } else {
	/*
	 * More than one argument: concatenate them together with spaces
	 * between, then evaluate the result.  Tcl_EvalObjEx will delete
	 * the object when it decrements its refcount after eval'ing it.
	 */
    	objPtr = Tcl_ConcatObj(objc-1, objv+1);
	result = Tcl_EvalObjEx(interp, objPtr, TCL_EVAL_DIRECT);
    }
    if (result == TCL_ERROR) {
	char msg[32 + TCL_INTEGER_SPACE];

	sprintf(msg, "\n    (\"eval\" body line %d)", interp->errorLine);
	Tcl_AddObjErrorInfo(interp, msg, -1);
    }
    return result;
}

/*
 *----------------------------------------------------------------------
 *
 * Tcl_ExitObjCmd --
 *
 *	This procedure is invoked to process the "exit" Tcl command.
 *	See the user documentation for details on what it does.
 *
 * Results:
 *	A standard Tcl object result.
 *
 * Side effects:
 *	See the user documentation.
 *
 *----------------------------------------------------------------------
 */

	/* ARGSUSED */
int
Tcl_ExitObjCmd(dummy, interp, objc, objv)
    ClientData dummy;		/* Not used. */
    Tcl_Interp *interp;		/* Current interpreter. */
    int objc;			/* Number of arguments. */
    Tcl_Obj *CONST objv[];	/* Argument objects. */
{
    int value;

    if ((objc != 1) && (objc != 2)) {
	Tcl_WrongNumArgs(interp, 1, objv, "?returnCode?");
	return TCL_ERROR;
    }
    
    if (objc == 1) {
	value = 0;
    } else if (Tcl_GetIntFromObj(interp, objv[1], &value) != TCL_OK) {
	return TCL_ERROR;
    }
    Tcl_Exit(value);
    /*NOTREACHED*/
    return TCL_OK;			/* Better not ever reach this! */
}

/*
 *----------------------------------------------------------------------
 *
 * Tcl_ExprObjCmd --
 *
 *	This object-based procedure is invoked to process the "expr" Tcl
 *	command. See the user documentation for details on what it does.
 *
 *	With the bytecode compiler, this procedure is called in two
 *	circumstances: 1) to execute expr commands that are too complicated
 *	or too unsafe to try compiling directly into an inline sequence of
 *	instructions, and 2) to execute commands where the command name is
 *	computed at runtime and is "expr" or the name to which "expr" was
 *	renamed (e.g., "set z expr; $z 2+3")
 *
 * Results:
 *	A standard Tcl object result.
 *
 * Side effects:
 *	See the user documentation.
 *
 *----------------------------------------------------------------------
 */

	/* ARGSUSED */
int
Tcl_ExprObjCmd(dummy, interp, objc, objv)
    ClientData dummy;		/* Not used. */
    Tcl_Interp *interp;		/* Current interpreter. */
    int objc;			/* Number of arguments. */
    Tcl_Obj *CONST objv[];	/* Argument objects. */
{	 
    register Tcl_Obj *objPtr;
    Tcl_Obj *resultPtr;
    register char *bytes;
    int length, i, result;

    if (objc < 2) {
	Tcl_WrongNumArgs(interp, 1, objv, "arg ?arg ...?");
	return TCL_ERROR;
    }

    if (objc == 2) {
	result = Tcl_ExprObj(interp, objv[1], &resultPtr);
	if (result == TCL_OK) {
	    Tcl_SetObjResult(interp, resultPtr);
	    Tcl_DecrRefCount(resultPtr);  /* done with the result object */
	}
	return result;
    }

    /*
     * Create a new object holding the concatenated argument strings.
     */

    /*** QUESTION: Do we need to copy the slow way? ***/
    bytes = Tcl_GetStringFromObj(objv[1], &length);
    objPtr = Tcl_NewStringObj(bytes, length);
    Tcl_IncrRefCount(objPtr);
    for (i = 2;  i < objc;  i++) {
	Tcl_AppendToObj(objPtr, " ", 1);
	bytes = Tcl_GetStringFromObj(objv[i], &length);
	Tcl_AppendToObj(objPtr, bytes, length);
    }

    /*
     * Evaluate the concatenated string object.
     */

    result = Tcl_ExprObj(interp, objPtr, &resultPtr);
    if (result == TCL_OK) {
	Tcl_SetObjResult(interp, resultPtr);
	Tcl_DecrRefCount(resultPtr);  /* done with the result object */
    }

    /*
     * Free allocated resources.
     */
    
    Tcl_DecrRefCount(objPtr);
    return result;
}

/*
 *----------------------------------------------------------------------
 *
 * Tcl_FileObjCmd --
 *
 *	This procedure is invoked to process the "file" Tcl command.
 *	See the user documentation for details on what it does.
 *	PLEASE NOTE THAT THIS FAILS WITH FILENAMES AND PATHS WITH
 *	EMBEDDED NULLS, WHICH COULD THEORETICALLY HAPPEN ON A MAC.
 *      With the object-based Tcl_FS APIs, the above NOTE may no
 *      longer be true.  In any case this assertion should be tested.
 *      
 * Results:
 *	A standard Tcl result.
 *
 * Side effects:
 *	See the user documentation.
 *
 *----------------------------------------------------------------------
 */

	/* ARGSUSED */
int
Tcl_FileObjCmd(dummy, interp, objc, objv)
    ClientData dummy;		/* Not used. */
    Tcl_Interp *interp;		/* Current interpreter. */
    int objc;			/* Number of arguments. */
    Tcl_Obj *CONST objv[];	/* Argument objects. */
{
    int index;

/*
 * This list of constants should match the fileOption string array below.
 */

    static CONST char *fileOptions[] = {
	"atime",	"attributes",	"channels",	"copy",
	"delete",
	"dirname",	"executable",	"exists",	"extension",
	"isdirectory",	"isfile",	"join",		"link",
	"lstat",        "mtime",	"mkdir",	"nativename",	
	"normalize",    "owned",
	"pathtype",	"readable",	"readlink",	"rename",
	"rootname",	"separator",    "size",		"split",	
	"stat",         "system", 
	"tail",		"type",		"volumes",	"writable",
	(char *) NULL
    };
    enum options {
	FILE_ATIME,	FILE_ATTRIBUTES, FILE_CHANNELS,	FILE_COPY,
	FILE_DELETE,
	FILE_DIRNAME,	FILE_EXECUTABLE, FILE_EXISTS,	FILE_EXTENSION,
	FILE_ISDIRECTORY, FILE_ISFILE,	FILE_JOIN,	FILE_LINK, 
	FILE_LSTAT,     FILE_MTIME,	FILE_MKDIR,	FILE_NATIVENAME, 
	FILE_NORMALIZE, FILE_OWNED,
	FILE_PATHTYPE,	FILE_READABLE,	FILE_READLINK,	FILE_RENAME,
	FILE_ROOTNAME,	FILE_SEPARATOR, FILE_SIZE,	FILE_SPLIT,	
	FILE_STAT,      FILE_SYSTEM, 
	FILE_TAIL,	FILE_TYPE,	FILE_VOLUMES,	FILE_WRITABLE
    };

    if (objc < 2) {
    	Tcl_WrongNumArgs(interp, 1, objv, "option ?arg ...?");
        return TCL_ERROR;
    }
    if (Tcl_GetIndexFromObj(interp, objv[1], fileOptions, "option", 0,
	    &index) != TCL_OK) {
    	return TCL_ERROR;
    }

    switch ((enum options) index) {
    	case FILE_ATIME: {
	    Tcl_StatBuf buf;
	    struct utimbuf tval;

	    if ((objc < 3) || (objc > 4)) {
		Tcl_WrongNumArgs(interp, 2, objv, "name ?time?");
		return TCL_ERROR;
	    }
	    if (GetStatBuf(interp, objv[2], Tcl_FSStat, &buf) != TCL_OK) {
		return TCL_ERROR;
	    }
	    if (objc == 4) {
		if (Tcl_GetLongFromObj(interp, objv[3],
			(long*)(&buf.st_atime)) != TCL_OK) {
		    return TCL_ERROR;
		}
		tval.actime = buf.st_atime;
		tval.modtime = buf.st_mtime;
		if (Tcl_FSUtime(objv[2], &tval) != 0) {
		    Tcl_AppendStringsToObj(Tcl_GetObjResult(interp),
			    "could not set access time for file \"",
			    Tcl_GetString(objv[2]), "\": ",
			    Tcl_PosixError(interp), (char *) NULL);
		    return TCL_ERROR;
		}
		/*
		 * Do another stat to ensure that the we return the
		 * new recognized atime - hopefully the same as the
		 * one we sent in.  However, fs's like FAT don't
		 * even know what atime is.
		 */
		if (GetStatBuf(interp, objv[2], Tcl_FSStat, &buf) != TCL_OK) {
		    return TCL_ERROR;
		}
	    }
	    Tcl_SetLongObj(Tcl_GetObjResult(interp), (long) buf.st_atime);
	    return TCL_OK;
	}
	case FILE_ATTRIBUTES: {
            return TclFileAttrsCmd(interp, objc, objv);
	}
	case FILE_CHANNELS: {
	    if ((objc < 2) || (objc > 3)) {
		Tcl_WrongNumArgs(interp, 2, objv, "?pattern?");
		return TCL_ERROR;
	    }
	    return Tcl_GetChannelNamesEx(interp,
		    ((objc == 2) ? NULL : Tcl_GetString(objv[2])));
	}
	case FILE_COPY: {
	    return TclFileCopyCmd(interp, objc, objv);
	}	    
	case FILE_DELETE: {
	    return TclFileDeleteCmd(interp, objc, objv);
	}
    	case FILE_DIRNAME: {
	    Tcl_Obj *dirPtr;
	    if (objc != 3) {
		goto only3Args;
	    }
	    dirPtr = TclFileDirname(interp, objv[2]);
	    if (dirPtr == NULL) {
	        return TCL_ERROR;
	    } else {
		Tcl_SetObjResult(interp, dirPtr);
		Tcl_DecrRefCount(dirPtr);
		return TCL_OK;
	    }
	}
	case FILE_EXECUTABLE: {
	    if (objc != 3) {
		goto only3Args;
	    }
	    return CheckAccess(interp, objv[2], X_OK);
	}
	case FILE_EXISTS: {
	    if (objc != 3) {
		goto only3Args;
	    }
	    return CheckAccess(interp, objv[2], F_OK);
	}
	case FILE_EXTENSION: {
	    char *fileName, *extension;
	    if (objc != 3) {
	    	goto only3Args;
	    }
	    fileName = Tcl_GetString(objv[2]);
	    extension = TclGetExtension(fileName);
	    if (extension != NULL) {
	    	Tcl_SetStringObj(Tcl_GetObjResult(interp), extension, -1);
	    }
	    return TCL_OK;
	}
    	case FILE_ISDIRECTORY: {
	    int value;
	    Tcl_StatBuf buf;

	    if (objc != 3) {
		goto only3Args;
	    }
	    value = 0;
	    if (GetStatBuf(NULL, objv[2], Tcl_FSStat, &buf) == TCL_OK) {
		value = S_ISDIR(buf.st_mode);
	    }
	    Tcl_SetBooleanObj(Tcl_GetObjResult(interp), value);
	    return TCL_OK;
	}
    	case FILE_ISFILE: {
	    int value;
	    Tcl_StatBuf buf;
	    
    	    if (objc != 3) {
    	    	goto only3Args;
    	    }
	    value = 0;
	    if (GetStatBuf(NULL, objv[2], Tcl_FSStat, &buf) == TCL_OK) {
		value = S_ISREG(buf.st_mode);
	    }
	    Tcl_SetBooleanObj(Tcl_GetObjResult(interp), value);
	    return TCL_OK;
	}
	case FILE_JOIN: {
	    Tcl_Obj *resObj;

	    if (objc < 3) {
		Tcl_WrongNumArgs(interp, 2, objv, "name ?name ...?");
		return TCL_ERROR;
	    }
	    resObj = Tcl_FSJoinToPath(NULL, objc - 2, objv + 2);
	    Tcl_SetObjResult(interp, resObj);
	    return TCL_OK;
	}
	case FILE_LINK: {