wasCSharpSQLite – Blame information for rev
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1 | office | 1 | /* |
2 | * LsetCmd.java |
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3 | * |
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4 | * Copyright (c) 1997 Cornell University. |
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5 | * Copyright (c) 1997 Sun Microsystems, Inc. |
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6 | * |
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7 | * See the file "license.terms" for information on usage and |
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8 | * redistribution of this file, and for a DISCLAIMER OF ALL |
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9 | * WARRANTIES. |
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10 | * |
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11 | * Included in SQLite3 port to C# for use in testharness only; 2008 Noah B Hart |
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12 | * |
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13 | * RCS @(#) $Id: LsetCmd.java,v 1.3 2003/01/09 02:15:39 mdejong Exp $ |
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14 | * |
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15 | */ |
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16 | using System; |
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17 | namespace tcl.lang |
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18 | { |
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19 | |||
20 | /// <summary> This class implements the built-in "Lset" command in Tcl.</summary> |
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21 | |||
22 | class LsetCmd : Command |
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23 | { |
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24 | /// <summary> See Tcl user documentation for details.</summary> |
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25 | /// <exception cref=""> TclException If incorrect number of arguments. |
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26 | /// </exception> |
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27 | |||
28 | public TCL.CompletionCode cmdProc( Interp interp, TclObject[] argv ) |
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29 | { |
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30 | if ( argv.Length != 4 ) |
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31 | { |
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32 | throw new TclNumArgsException( interp, 1, argv, "lset list index element" ); |
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33 | } |
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34 | |||
35 | int size = TclList.getLength( interp, argv[1] ); |
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36 | int index = Util.getIntForIndex( interp, argv[2], size ); |
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37 | TclObject list = argv[1]; |
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38 | bool isDuplicate = false; |
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39 | |||
40 | // If the list object is unshared we can modify it directly. Otherwise |
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41 | // we create a copy to modify: this is "copy on write". |
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42 | |||
43 | if ( list.Shared ) |
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44 | { |
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45 | list = list.duplicate(); |
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46 | isDuplicate = true; |
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47 | } |
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48 | |||
49 | try |
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50 | { TclObject[] replace = new TclObject[1]; |
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51 | replace[0]=argv[3]; |
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52 | TclList.replace(interp,list,index,1,replace,0,0 ); |
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53 | interp.setResult( list ); |
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54 | } |
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55 | catch ( TclException e ) |
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56 | { |
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57 | if ( isDuplicate ) |
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58 | { |
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59 | list.release(); |
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60 | } |
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61 | throw; |
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62 | } |
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63 | return TCL.CompletionCode.RETURN; |
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64 | } |
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65 | } |
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66 | } |