/*
 * SourceCmd.java
 *
 *	Implements the "source" command.
 *
 * Copyright (c) 1997 Cornell University.
 * Copyright (c) 1997 Sun Microsystems, Inc.
 *
 * See the file "license.terms" for information on usage and
 * redistribution of this file, and for a DISCLAIMER OF ALL
 * WARRANTIES.
 * 
 * RCS: @(#) $Id: SourceCmd.java,v 1.1.1.1 1998/10/14 21:09:20 cvsadmin Exp $
 *
 */

package tcl.lang;

/*
 * This class implements the built-in "source" command in Tcl.
 */

class SourceCmd implements Command {


/*
 *----------------------------------------------------------------------
 *
 * cmdProc --
 *
 *	This cmdProc is invoked to process the "source" Tcl command.
 *	See the user documentation for details on what it does.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	A standard Tcl result is stored in the interpreter.  See the
 *	user documentation.
 *
 *----------------------------------------------------------------------
 */

public void
cmdProc(
    Interp interp,			// Current interpreter.
    TclObject argv[])			// Argument list.
throws
    TclException			// Standard Tcl exception.
{
    String fileName = null;
    boolean url = false;

    if (argv.length == 2) {
	fileName = argv[1].toString();
    } else if (argv.length == 3) {
	if (argv[1].toString().equals("-url")) {
	    url = true;
	    fileName = argv[2].toString();
	}
    }

    if (fileName == null) {
	throw new TclNumArgsException(interp, 1, argv, "?-url? fileName");
    }

    try {
	if (url) {
	    if (fileName.startsWith("resource:/")) {
		interp.evalResource(fileName.substring(9));
	    } else {
		interp.evalURL(null, fileName);
	    }
	} else {
	    interp.evalFile(fileName);
	}
    } catch (TclException e) {
	int code = e.getCompletionCode();

	if (code == TCL.RETURN) {
	    int realCode = interp.updateReturnInfo();
	    if (realCode != TCL.OK) {
		e.setCompletionCode(realCode);
		throw e;
	    }
	} else if (code == TCL.ERROR) {
	    /*
	     * Record information telling where the error occurred.
	     */

	    interp.addErrorInfo("\n    (file line " +
		    interp.errorLine + ")");
	    throw e;
	} else {
	    throw e;
	}
    }
}

} // end SourceCmd