/trunk/managed/csharp-sqlite/TCL/src/commands/LreplaceCmd.cs
C# | 95 lines | 59 code | 11 blank | 25 comment | 8 complexity | c07fc6f57480c51f71be815c6f367202 MD5 | raw file
Possible License(s): Apache-2.0, BSD-2-Clause, MIT, LGPL-2.1, LGPL-3.0, GPL-2.0, CC-BY-SA-3.0, GPL-3.0, BSD-3-Clause
- /*
- * LreplaceCmd.java
- *
- * 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.
- *
- * Included in SQLite3 port to C# for use in testharness only; 2008 Noah B Hart
- * $Header$
- * RCS @(#) $Id: LreplaceCmd.java,v 1.5 2003/01/09 02:15:39 mdejong Exp $
- *
- */
- using System;
- namespace tcl.lang
- {
-
- /// <summary> This class implements the built-in "lreplace" command in Tcl.</summary>
-
- class LreplaceCmd : Command
- {
- /// <summary> See Tcl user documentation for details.</summary>
- /// <exception cref=""> TclException If incorrect number of arguments.
- /// </exception>
-
- public TCL.CompletionCode cmdProc(Interp interp, TclObject[] argv)
- {
- if (argv.Length < 4)
- {
- throw new TclNumArgsException(interp, 1, argv, "list first last ?element element ...?");
- }
- int size = TclList.getLength(interp, argv[1]);
- int first = Util.getIntForIndex(interp, argv[2], size - 1);
- int last = Util.getIntForIndex(interp, argv[3], size - 1);
- int numToDelete;
-
- if (first < 0)
- {
- first = 0;
- }
-
- // Complain if the user asked for a start element that is greater
- // than the list length. This won't ever trigger for the "end*"
- // case as that will be properly constrained by getIntForIndex
- // because we use size-1 (to allow for replacing the last elem).
-
- if ((first >= size) && (size > 0))
- {
-
- throw new TclException(interp, "list doesn't contain element " + argv[2]);
- }
- if (last >= size)
- {
- last = size - 1;
- }
- if (first <= last)
- {
- numToDelete = (last - first + 1);
- }
- else
- {
- numToDelete = 0;
- }
-
- TclObject list = argv[1];
- bool isDuplicate = false;
-
- // If the list object is unshared we can modify it directly. Otherwise
- // we create a copy to modify: this is "copy on write".
-
- if (list.Shared)
- {
- list = list.duplicate();
- isDuplicate = true;
- }
-
- try
- {
- TclList.replace(interp, list, first, numToDelete, argv, 4, argv.Length - 1);
- interp.setResult(list);
- }
- catch (TclException e)
- {
- if (isDuplicate)
- {
- list.release();
- }
- throw ;
- }
- return TCL.CompletionCode.RETURN;
- }
- }
- }