git.zerfleddert.de Git - micropolis/blob - src/tclx/src/tclxclck.c

   1 /*
   2  * tclXclock.c --
   3  *
   4  *      Contains the TCL time and date related commands.
   5  *-----------------------------------------------------------------------------
   6  * Copyright 1992 Karl Lehenbauer and Mark Diekhans.
   7  *
   8  * Permission to use, copy, modify, and distribute this software and its
   9  * documentation for any purpose and without fee is hereby granted, provided
  10  * that the above copyright notice appear in all copies.  Karl Lehenbauer and
  11  * Mark Diekhans make no representations about the suitability of this
  12  * software for any purpose.  It is provided "as is" without express or
  13  * implied warranty.
  14  *-----------------------------------------------------------------------------
  15  * $Id: tclXclock.c,v 2.0 1992/10/16 04:50:28 markd Rel $
  16  *-----------------------------------------------------------------------------
  17  */
  18
  19 #include <time.h>
  20 #include "tclxint.h"
  21
  22 \f
  23 /*
  24  *-----------------------------------------------------------------------------
  25  *
  26  * Tcl_GetclockCmd --
  27  *     Implements the TCL getclock command:
  28  *         getclock
  29  *
  30  * Results:
  31  *     Standard TCL results.
  32  *
  33  *-----------------------------------------------------------------------------
  34  */
  35 int
  36 Tcl_GetclockCmd (clientData, interp, argc, argv)
  37     ClientData  clientData;
  38     Tcl_Interp *interp;
  39     int         argc;
  40     char      **argv;
  41 {
  42     if (argc != 1) {
  43         Tcl_AppendResult (interp, tclXWrongArgs, argv[0], (char *) NULL);
  44         return TCL_ERROR;
  45     }
  46     sprintf (interp->result, "%ld", time ((long *) NULL));
  47     return TCL_OK;
  48 }
  49 \f
  50 /*
  51  *-----------------------------------------------------------------------------
  52  *
  53  * Tcl_FmtclockCmd --
  54  *     Implements the TCL fmtclock command:
  55  *         fmtclock clockval [format] [GMT|{}]
  56  *
  57  * Results:
  58  *     Standard TCL results.
  59  *
  60  *-----------------------------------------------------------------------------
  61  */
  62 int
  63 Tcl_FmtclockCmd (clientData, interp, argc, argv)
  64     ClientData  clientData;
  65     Tcl_Interp *interp;
  66     int         argc;
  67     char      **argv;
  68 {
  69     int              useGMT = FALSE;
  70     long             clockVal;
  71     char            *format;
  72     struct tm       *timeDataPtr;
  73     int              fmtError;
  74
  75     if ((argc < 2) || (argc > 4)) {
  76         Tcl_AppendResult (interp, tclXWrongArgs, argv [0],
  77                           " clockval [format] [GMT|{}]", (char *) NULL);
  78         return TCL_ERROR;
  79     }
  80
  81     if (Tcl_GetLong (interp, argv[1], &clockVal) != TCL_OK)
  82         return TCL_ERROR;
  83     if ((argc == 4) && (argv [3][0] != '\0')) {
  84         if (!STREQU (argv [3], "GMT")) {
  85             Tcl_AppendResult (interp, "expected \"GMT\" or {} got \"",
  86                               argv [3], "\"", (char *) NULL);
  87             return TCL_ERROR;
  88         }
  89         useGMT = TRUE;
  90     }
  91
  92     if ((argc >= 3) && (argv [2][0] != '\0'))
  93         format = argv[2];
  94     else
  95         format = "%a %b %d %X %Z %Y";
  96
  97     if (useGMT)
  98         timeDataPtr = gmtime (&clockVal);
  99     else
 100         timeDataPtr = localtime (&clockVal);
 101
 102     fmtError = strftime (interp->result, TCL_RESULT_SIZE, format,
 103                          timeDataPtr) < 0;
 104     if (fmtError) {
 105         Tcl_AppendResult (interp, "error formating time", (char *) NULL);
 106         return TCL_ERROR;
 107     }
 108     return TCL_OK;
 109 }