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-rw-r--r--contrib/tcl/generic/tclClock.c353
1 files changed, 353 insertions, 0 deletions
diff --git a/contrib/tcl/generic/tclClock.c b/contrib/tcl/generic/tclClock.c
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+++ b/contrib/tcl/generic/tclClock.c
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+/*
+ * tclClock.c --
+ *
+ * Contains the time and date related commands. This code
+ * is derived from the time and date facilities of TclX,
+ * by Mark Diekhans and Karl Lehenbauer.
+ *
+ * Copyright 1991-1995 Karl Lehenbauer and Mark Diekhans.
+ * Copyright (c) 1995 Sun Microsystems, Inc.
+ *
+ * See the file "license.terms" for information on usage and redistribution
+ * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
+ *
+ * SCCS: @(#) tclClock.c 1.19 96/03/13 11:28:45
+ */
+
+#include "tcl.h"
+#include "tclInt.h"
+#include "tclPort.h"
+
+/*
+ * Function prototypes for local procedures in this file:
+ */
+
+static int FormatClock _ANSI_ARGS_((Tcl_Interp *interp,
+ unsigned long clockVal, int useGMT,
+ char *format));
+static int ParseTime _ANSI_ARGS_((Tcl_Interp *interp,
+ char *string, unsigned long *timePtr));
+
+/*
+ *-----------------------------------------------------------------------------
+ *
+ * Tcl_ClockCmd --
+ *
+ * This procedure is invoked to process the "clock" Tcl command.
+ * See the user documentation for details on what it does.
+ *
+ * Results:
+ * A standard Tcl result.
+ *
+ * Side effects:
+ * See the user documentation.
+ *
+ *-----------------------------------------------------------------------------
+ */
+
+int
+Tcl_ClockCmd (dummy, interp, argc, argv)
+ ClientData dummy; /* Not used. */
+ Tcl_Interp *interp; /* Current interpreter. */
+ int argc; /* Number of arguments. */
+ char **argv; /* Argument strings. */
+{
+ int c;
+ size_t length;
+ char **argPtr;
+ int useGMT = 0;
+ unsigned long clockVal;
+
+ if (argc < 2) {
+ Tcl_AppendResult(interp, "wrong # args: should be \"",
+ argv[0], " option ?arg ...?\"", (char *) NULL);
+ return TCL_ERROR;
+ }
+ c = argv[1][0];
+ length = strlen(argv[1]);
+ if ((c == 'c') && (strncmp(argv[1], "clicks", length) == 0)) {
+ if (argc != 2) {
+ Tcl_AppendResult(interp, "wrong # arguments: must be \"",
+ argv[0], " clicks\"", (char *) NULL);
+ return TCL_ERROR;
+ }
+ sprintf(interp->result, "%lu", TclGetClicks());
+ return TCL_OK;
+ } else if ((c == 'f') && (strncmp(argv[1], "format", length) == 0)) {
+ char *format = "%a %b %d %X %Z %Y";
+
+ if ((argc < 3) || (argc > 7)) {
+ wrongFmtArgs:
+ Tcl_AppendResult(interp, "wrong # args: ", argv [0],
+ " format clockval ?-format string? ?-gmt boolean?",
+ (char *) NULL);
+ return TCL_ERROR;
+ }
+
+ if (ParseTime(interp, argv[2], &clockVal) != TCL_OK) {
+ return TCL_ERROR;
+ }
+
+ argPtr = argv+3;
+ argc -= 3;
+ while ((argc > 1) && (argPtr[0][0] == '-')) {
+ if (strcmp(argPtr[0], "-format") == 0) {
+ format = argPtr[1];
+ } else if (strcmp(argPtr[0], "-gmt") == 0) {
+ if (Tcl_GetBoolean(interp, argPtr[1], &useGMT) != TCL_OK) {
+ return TCL_ERROR;
+ }
+ } else {
+ Tcl_AppendResult(interp, "bad option \"", argPtr[0],
+ "\": must be -format or -gmt", (char *) NULL);
+ return TCL_ERROR;
+ }
+ argPtr += 2;
+ argc -= 2;
+ }
+ if (argc != 0) {
+ goto wrongFmtArgs;
+ }
+
+ return FormatClock(interp, clockVal, useGMT, format);
+ } else if ((c == 's') && (strncmp(argv[1], "scan", length) == 0)) {
+ unsigned long baseClock;
+ long zone;
+ char * baseStr = NULL;
+
+ if ((argc < 3) || (argc > 7)) {
+ wrongScanArgs:
+ Tcl_AppendResult (interp, "wrong # args: ", argv [0],
+ " scan dateString ?-base clockValue? ?-gmt boolean?",
+ (char *) NULL);
+ return TCL_ERROR;
+ }
+
+ argPtr = argv+3;
+ argc -= 3;
+ while ((argc > 1) && (argPtr[0][0] == '-')) {
+ if (strcmp(argPtr[0], "-base") == 0) {
+ baseStr = argPtr[1];
+ } else if (strcmp(argPtr[0], "-gmt") == 0) {
+ if (Tcl_GetBoolean(interp, argPtr[1], &useGMT) != TCL_OK) {
+ return TCL_ERROR;
+ }
+ } else {
+ Tcl_AppendResult(interp, "bad option \"", argPtr[0],
+ "\": must be -base or -gmt", (char *) NULL);
+ return TCL_ERROR;
+ }
+ argPtr += 2;
+ argc -= 2;
+ }
+ if (argc != 0) {
+ goto wrongScanArgs;
+ }
+
+ if (baseStr != NULL) {
+ if (ParseTime(interp, baseStr, &baseClock) != TCL_OK)
+ return TCL_ERROR;
+ } else {
+ baseClock = TclGetSeconds();
+ }
+
+ if (useGMT) {
+ zone = -50000; /* Force GMT */
+ } else {
+ zone = TclGetTimeZone(baseClock);
+ }
+
+ if (TclGetDate(argv[2], baseClock, zone, &clockVal) < 0) {
+ Tcl_AppendResult(interp, "unable to convert date-time string \"",
+ argv[2], "\"", (char *) NULL);
+ return TCL_ERROR;
+ }
+
+ sprintf(interp->result, "%lu", (long) clockVal);
+ return TCL_OK;
+ } else if ((c == 's') && (strncmp(argv[1], "seconds", length) == 0)) {
+ if (argc != 2) {
+ Tcl_AppendResult(interp, "wrong # arguments: must be \"",
+ argv[0], " seconds\"", (char *) NULL);
+ return TCL_ERROR;
+ }
+ sprintf(interp->result, "%lu", TclGetSeconds());
+ return TCL_OK;
+ } else {
+ Tcl_AppendResult(interp, "unknown option \"", argv[1],
+ "\": must be clicks, format, scan, or seconds",
+ (char *) NULL);
+ return TCL_ERROR;
+ }
+}
+
+/*
+ *-----------------------------------------------------------------------------
+ *
+ * ParseTime --
+ *
+ * Given a string, produce the corresponding time_t value.
+ *
+ * Results:
+ * The return value is normally TCL_OK; in this case *timePtr
+ * will be set to the integer value equivalent to string. If
+ * string is improperly formed then TCL_ERROR is returned and
+ * an error message will be left in interp->result.
+ *
+ * Side effects:
+ * None.
+ *
+ *-----------------------------------------------------------------------------
+ */
+
+static int
+ParseTime(interp, string, timePtr)
+ Tcl_Interp *interp;
+ char *string;
+ unsigned long *timePtr;
+{
+ char *end, *p;
+ unsigned long i;
+
+ /*
+ * Since some strtoul functions don't detect negative numbers, check
+ * in advance.
+ */
+ errno = 0;
+ for (p = (char *) string; isspace(UCHAR(*p)); p++) {
+ /* Empty loop body. */
+ }
+ if (*p == '+') {
+ p++;
+ }
+ i = strtoul(p, &end, 0);
+ if (end == p) {
+ goto badTime;
+ }
+ if (errno == ERANGE) {
+ interp->result = "integer value too large to represent";
+ Tcl_SetErrorCode(interp, "ARITH", "IOVERFLOW",
+ interp->result, (char *) NULL);
+ return TCL_ERROR;
+ }
+ while ((*end != '\0') && isspace(UCHAR(*end))) {
+ end++;
+ }
+ if (*end != '\0') {
+ goto badTime;
+ }
+
+ *timePtr = (time_t) i;
+ if (*timePtr != i) {
+ goto badTime;
+ }
+ return TCL_OK;
+
+ badTime:
+ Tcl_AppendResult (interp, "expected unsigned time but got \"",
+ string, "\"", (char *) NULL);
+ return TCL_ERROR;
+}
+
+/*
+ *-----------------------------------------------------------------------------
+ *
+ * FormatClock --
+ *
+ * Formats a time value based on seconds into a human readable
+ * string.
+ *
+ * Results:
+ * Standard Tcl result.
+ *
+ * Side effects:
+ * None.
+ *
+ *-----------------------------------------------------------------------------
+ */
+
+static int
+FormatClock(interp, clockVal, useGMT, format)
+ Tcl_Interp *interp; /* Current interpreter. */
+ unsigned long clockVal; /* Time in seconds. */
+ int useGMT; /* Boolean */
+ char *format; /* Format string */
+{
+ struct tm *timeDataPtr;
+ Tcl_DString buffer;
+ int bufSize;
+#ifdef TCL_USE_TIMEZONE_VAR
+ int savedTimeZone;
+ char *savedTZEnv;
+#endif
+
+#ifdef HAVE_TZSET
+ /*
+ * Some systems forgot to call tzset in localtime, make sure its done.
+ */
+ static int calledTzset = 0;
+
+ if (!calledTzset) {
+ tzset();
+ calledTzset = 1;
+ }
+#endif
+
+#ifdef TCL_USE_TIMEZONE_VAR
+ /*
+ * This is a horrible kludge for systems not having the timezone in
+ * struct tm. No matter what was specified, they use the global time
+ * zone. (Thanks Solaris).
+ */
+ if (useGMT) {
+ char *varValue;
+
+ varValue = Tcl_GetVar2(interp, "env", "TZ", TCL_GLOBAL_ONLY);
+ if (varValue != NULL) {
+ savedTZEnv = strcpy(ckalloc(strlen(varValue) + 1), varValue);
+ } else {
+ savedTZEnv = NULL;
+ }
+ Tcl_SetVar2(interp, "env", "TZ", "GMT", TCL_GLOBAL_ONLY);
+ savedTimeZone = timezone;
+ timezone = 0;
+ tzset();
+ }
+#endif
+
+ if (useGMT) {
+ timeDataPtr = gmtime((time_t *) &clockVal);
+ } else {
+ timeDataPtr = localtime((time_t *) &clockVal);
+ }
+
+ /*
+ * Format the time, increasing the buffer size until strftime succeeds.
+ */
+ bufSize = TCL_DSTRING_STATIC_SIZE - 1;
+ Tcl_DStringInit(&buffer);
+ Tcl_DStringSetLength(&buffer, bufSize);
+
+ while (strftime(buffer.string, (unsigned int) bufSize, format,
+ timeDataPtr) == 0) {
+ bufSize *= 2;
+ Tcl_DStringSetLength(&buffer, bufSize);
+ }
+
+#ifdef TCL_USE_TIMEZONE_VAR
+ if (useGMT) {
+ if (savedTZEnv != NULL) {
+ Tcl_SetVar2(interp, "env", "TZ", savedTZEnv, TCL_GLOBAL_ONLY);
+ ckfree(savedTZEnv);
+ } else {
+ Tcl_UnsetVar2(interp, "env", "TZ", TCL_GLOBAL_ONLY);
+ }
+ timezone = savedTimeZone;
+ tzset();
+ }
+#endif
+
+ Tcl_DStringResult(interp, &buffer);
+ return TCL_OK;
+}
+
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