diff -r 000000000000 -r bde4ae8d615e os/persistentdata/persistentstorage/sqlite3api/TEST/TCL/tcldistribution/generic/tclClock.c --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/os/persistentdata/persistentstorage/sqlite3api/TEST/TCL/tcldistribution/generic/tclClock.c Fri Jun 15 03:10:57 2012 +0200 @@ -0,0 +1,390 @@ +/* + * 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. + * + * RCS: @(#) $Id: tclClock.c,v 1.20.2.3 2007/04/21 22:42:49 kennykb Exp $ + */ + +#include "tcl.h" +#include "tclInt.h" +#include "tclPort.h" + +/* + * The date parsing stuff uses lexx and has tons o statics. + */ + +TCL_DECLARE_MUTEX(clockMutex) + +/* + * Function prototypes for local procedures in this file: + */ + +static int FormatClock _ANSI_ARGS_((Tcl_Interp *interp, + Tcl_WideInt clockVal, int useGMT, + char *format)); + +/* + *------------------------------------------------------------------------- + * + * Tcl_ClockObjCmd -- + * + * 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_ClockObjCmd (client, interp, objc, objv) + ClientData client; /* Not used. */ + Tcl_Interp *interp; /* Current interpreter. */ + int objc; /* Number of arguments. */ + Tcl_Obj *CONST objv[]; /* Argument values. */ +{ + Tcl_Obj *resultPtr; + int index; + Tcl_Obj *CONST *objPtr; + int useGMT = 0; + char *format = "%a %b %d %X %Z %Y"; + int dummy; + Tcl_WideInt baseClock, clockVal; + long zone; + Tcl_Obj *baseObjPtr = NULL; + char *scanStr; + int n; + + static CONST char *switches[] = + {"clicks", "format", "scan", "seconds", (char *) NULL}; + enum command { COMMAND_CLICKS, COMMAND_FORMAT, COMMAND_SCAN, + COMMAND_SECONDS + }; + static CONST char *formatSwitches[] = {"-format", "-gmt", (char *) NULL}; + static CONST char *scanSwitches[] = {"-base", "-gmt", (char *) NULL}; + + resultPtr = Tcl_GetObjResult(interp); + if (objc < 2) { + Tcl_WrongNumArgs(interp, 1, objv, "option ?arg ...?"); + return TCL_ERROR; + } + + if (Tcl_GetIndexFromObj(interp, objv[1], switches, "option", 0, &index) + != TCL_OK) { + return TCL_ERROR; + } + switch ((enum command) index) { + case COMMAND_CLICKS: { /* clicks */ + int forceMilli = 0; + + if (objc == 3) { + format = Tcl_GetStringFromObj(objv[2], &n); + if ( ( n >= 2 ) + && ( strncmp( format, "-milliseconds", + (unsigned int) n) == 0 ) ) { + forceMilli = 1; + } else { + Tcl_AppendStringsToObj(resultPtr, + "bad switch \"", format, + "\": must be -milliseconds", (char *) NULL); + return TCL_ERROR; + } + } else if (objc != 2) { + Tcl_WrongNumArgs(interp, 2, objv, "?-milliseconds?"); + return TCL_ERROR; + } + if (forceMilli) { + /* + * We can enforce at least millisecond granularity + */ + Tcl_Time time; + Tcl_GetTime(&time); + Tcl_SetLongObj(resultPtr, + (long) (time.sec*1000 + time.usec/1000)); + } else { + Tcl_SetLongObj(resultPtr, (long) TclpGetClicks()); + } + return TCL_OK; + } + + case COMMAND_FORMAT: /* format */ + if ((objc < 3) || (objc > 7)) { + wrongFmtArgs: + Tcl_WrongNumArgs(interp, 2, objv, + "clockval ?-format string? ?-gmt boolean?"); + return TCL_ERROR; + } + + if (Tcl_GetWideIntFromObj(interp, objv[2], &clockVal) + != TCL_OK) { + return TCL_ERROR; + } + + objPtr = objv+3; + objc -= 3; + while (objc > 1) { + if (Tcl_GetIndexFromObj(interp, objPtr[0], formatSwitches, + "switch", 0, &index) != TCL_OK) { + return TCL_ERROR; + } + switch (index) { + case 0: /* -format */ + format = Tcl_GetStringFromObj(objPtr[1], &dummy); + break; + case 1: /* -gmt */ + if (Tcl_GetBooleanFromObj(interp, objPtr[1], + &useGMT) != TCL_OK) { + return TCL_ERROR; + } + break; + } + objPtr += 2; + objc -= 2; + } + if (objc != 0) { + goto wrongFmtArgs; + } + return FormatClock(interp, clockVal, useGMT, + format); + + case COMMAND_SCAN: /* scan */ + if ((objc < 3) || (objc > 7)) { + wrongScanArgs: + Tcl_WrongNumArgs(interp, 2, objv, + "dateString ?-base clockValue? ?-gmt boolean?"); + return TCL_ERROR; + } + + objPtr = objv+3; + objc -= 3; + while (objc > 1) { + if (Tcl_GetIndexFromObj(interp, objPtr[0], scanSwitches, + "switch", 0, &index) != TCL_OK) { + return TCL_ERROR; + } + switch (index) { + case 0: /* -base */ + baseObjPtr = objPtr[1]; + break; + case 1: /* -gmt */ + if (Tcl_GetBooleanFromObj(interp, objPtr[1], + &useGMT) != TCL_OK) { + return TCL_ERROR; + } + break; + } + objPtr += 2; + objc -= 2; + } + if (objc != 0) { + goto wrongScanArgs; + } + + if (baseObjPtr != NULL) { + if (Tcl_GetWideIntFromObj(interp, baseObjPtr, + &baseClock) != TCL_OK) { + return TCL_ERROR; + } + } else { + baseClock = TclpGetSeconds(); + } + + if (useGMT) { + zone = -50000; /* Force GMT */ + } else { + zone = TclpGetTimeZone(baseClock); + } + + scanStr = Tcl_GetStringFromObj(objv[2], &dummy); + Tcl_MutexLock(&clockMutex); + if (TclGetDate(scanStr, baseClock, zone, + &clockVal) < 0) { + Tcl_MutexUnlock(&clockMutex); + Tcl_AppendStringsToObj(resultPtr, + "unable to convert date-time string \"", + scanStr, "\"", (char *) NULL); + return TCL_ERROR; + } + Tcl_MutexUnlock(&clockMutex); + + Tcl_SetWideIntObj(resultPtr, clockVal); + return TCL_OK; + + case COMMAND_SECONDS: /* seconds */ + if (objc != 2) { + Tcl_WrongNumArgs(interp, 2, objv, NULL); + return TCL_ERROR; + } + Tcl_SetLongObj(resultPtr, (long) TclpGetSeconds()); + return TCL_OK; + default: + return TCL_ERROR; /* Should never be reached. */ + } +} + +/* + *----------------------------------------------------------------------------- + * + * 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. */ + Tcl_WideInt clockVal; /* Time in seconds. */ + int useGMT; /* Boolean */ + char *format; /* Format string */ +{ + struct tm *timeDataPtr; + Tcl_DString buffer, uniBuffer; + int bufSize; + char *p; + int result; + time_t tclockVal; +#if !defined(HAVE_TM_ZONE) && !defined(WIN32) + TIMEZONE_t savedTimeZone = 0; /* lint. */ + char *savedTZEnv = NULL; /* lint. */ +#endif + +#ifdef HAVE_TZSET + /* + * Some systems forgot to call tzset in localtime, make sure its done. + */ + static int calledTzset = 0; + + Tcl_MutexLock(&clockMutex); + if (!calledTzset) { + tzset(); + calledTzset = 1; + } + Tcl_MutexUnlock(&clockMutex); +#endif + + /* + * If the user gave us -format "", just return now + */ + if (*format == '\0') { + return TCL_OK; + } + +#if !defined(HAVE_TM_ZONE) && !defined(WIN32) + /* + * This is a kludge for systems not having the timezone string in + * struct tm. No matter what was specified, they use the local + * timezone string. Since this kludge requires fiddling with the + * TZ environment variable, it will mess up if done on multiple + * threads at once. Protect it with a the clock mutex. + */ + + Tcl_MutexLock( &clockMutex ); + if (useGMT) { + CONST 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", "GMT0", TCL_GLOBAL_ONLY); + savedTimeZone = timezone; + timezone = 0; + tzset(); + } +#endif + + tclockVal = (time_t) clockVal; + timeDataPtr = TclpGetDate((TclpTime_t) &tclockVal, useGMT); + + /* + * Make a guess at the upper limit on the substituted string size + * based on the number of percents in the string. + */ + + for (bufSize = 1, p = format; *p != '\0'; p++) { + if (*p == '%') { + bufSize += 40; + } else { + bufSize++; + } + } + Tcl_DStringInit(&uniBuffer); + Tcl_UtfToExternalDString(NULL, format, -1, &uniBuffer); + Tcl_DStringInit(&buffer); + Tcl_DStringSetLength(&buffer, bufSize); + + /* If we haven't locked the clock mutex up above, lock it now. */ + +#if defined(HAVE_TM_ZONE) || defined(WIN32) + Tcl_MutexLock(&clockMutex); +#endif + result = TclpStrftime(buffer.string, (unsigned int) bufSize, + Tcl_DStringValue(&uniBuffer), timeDataPtr, useGMT); +#if defined(HAVE_TM_ZONE) || defined(WIN32) + Tcl_MutexUnlock(&clockMutex); +#endif + Tcl_DStringFree(&uniBuffer); + +#if !defined(HAVE_TM_ZONE) && !defined(WIN32) + 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(); + } + Tcl_MutexUnlock( &clockMutex ); +#endif + + if (result == 0) { + /* + * A zero return is the error case (can also mean the strftime + * didn't get enough space to write into). We know it doesn't + * mean that we wrote zero chars because the check for an empty + * format string is above. + */ + Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), + "bad format string \"", format, "\"", (char *) NULL); + return TCL_ERROR; + } + + /* + * Convert the time to UTF from external encoding [Bug: 3345] + */ + Tcl_DStringInit(&uniBuffer); + Tcl_ExternalToUtfDString(NULL, buffer.string, -1, &uniBuffer); + + Tcl_SetStringObj(Tcl_GetObjResult(interp), uniBuffer.string, -1); + + Tcl_DStringFree(&uniBuffer); + Tcl_DStringFree(&buffer); + return TCL_OK; +} +