date_object.cpp
// -*- c-basic-offset: 2 -*-
/*
* This file is part of the KDE libraries
* Copyright (C) 1999-2005 Harri Porten (porten@kde.org)
* Copyright (C) 2004 Apple Computer, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#if TIME_WITH_SYS_TIME
# include <sys/time.h>
# include <time.h>
#else
#if HAVE_SYS_TIME_H
#include <sys/time.h>
#else
# include <time.h>
# endif
#endif
#ifdef HAVE_SYS_TIMEB_H
#include <sys/timeb.h>
#endif
#include <errno.h>
#ifdef HAVE_SYS_PARAM_H
# include <sys/param.h>
#endif // HAVE_SYS_PARAM_H
#include <math.h>
#include <string.h>
#ifdef HAVE_STRINGS_H
# include <strings.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <locale.h>
#include <ctype.h>
#include <assert.h>
#include <limits.h>
#include "date_object.h"
#include "error_object.h"
#include "operations.h"
#include "date_object.lut.h"
#ifdef _MSC_VER
# define strncasecmp(a,b,c) _strnicmp(a,b,c)
#endif
using namespace KJS;
// come constants
const time_t invalidDate = LONG_MIN;
const double hoursPerDay = 24;
const double minutesPerHour = 60;
const double secondsPerMinute = 60;
const double msPerSecond = 1000;
const double msPerMinute = msPerSecond * secondsPerMinute;
const double msPerHour = msPerMinute * minutesPerHour;
const double msPerDay = msPerHour * hoursPerDay;
static const char * const weekdayName[7] = { "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sun" };
static const char * const monthName[12] = { "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" };
static UString formatDate(struct tm &tm)
{
char buffer[100];
snprintf(buffer, sizeof(buffer), "%s %s %02d %04d",
weekdayName[(tm.tm_wday + 6) % 7],
monthName[tm.tm_mon], tm.tm_mday, tm.tm_year + 1900);
return buffer;
}
static UString formatDateUTCVariant(struct tm &tm)
{
char buffer[100];
snprintf(buffer, sizeof(buffer), "%s, %02d %s %04d",
weekdayName[(tm.tm_wday + 6) % 7],
tm.tm_mday, monthName[tm.tm_mon], tm.tm_year + 1900);
return buffer;
}
static UString formatTime(struct tm &tm)
{
int tz;
char buffer[100];
#if defined BSD || defined(__linux__) || defined(__APPLE__)
tz = tm.tm_gmtoff;
#else
# if defined(__BORLANDC__) || defined (__CYGWIN__)
tz = - _timezone;
# else
tz = - timezone;
# endif
#endif
if (tz == 0) {
snprintf(buffer, sizeof(buffer), "%02d:%02d:%02d GMT", tm.tm_hour, tm.tm_min, tm.tm_sec);
} else {
int offset = tz;
if (offset < 0) {
offset = -offset;
}
snprintf(buffer, sizeof(buffer), "%02d:%02d:%02d GMT%c%02d%02d",
tm.tm_hour, tm.tm_min, tm.tm_sec,
tz < 0 ? '-' : '+', offset / (60*60), (offset / 60) % 60);
}
return UString(buffer);
}
static int day(double t)
{
return int(floor(t / msPerDay));
}
static double dayFromYear(int year)
{
return 365.0 * (year - 1970)
+ floor((year - 1969) / 4.0)
- floor((year - 1901) / 100.0)
+ floor((year - 1601) / 400.0);
}
// depending on whether it's a leap year or not
static int daysInYear(int year)
{
if (year % 4 != 0)
return 365;
else if (year % 400 == 0)
return 366;
else if (year % 100 == 0)
return 365;
else
return 366;
}
// time value of the start of a year
double timeFromYear(int year)
{
return msPerDay * dayFromYear(year);
}
// year determined by time value
int yearFromTime(double t)
{
// ### there must be an easier way
// initial guess
int y = 1970 + int(t / (365.25 * msPerDay));
// adjustment
if (timeFromYear(y) > t) {
do {
--y;
} while (timeFromYear(y) > t);
} else {
while (timeFromYear(y + 1) < t)
++y;
}
return y;
}
// 0: Sunday, 1: Monday, etc.
int weekDay(double t)
{
int wd = (day(t) + 4) % 7;
if (wd < 0)
wd += 7;
return wd;
}
static double timeZoneOffset(const struct tm *t)
{
#if defined BSD || defined(__linux__) || defined(__APPLE__)
return -(t->tm_gmtoff / 60);
#else
# if defined(__BORLANDC__) || defined(__CYGWIN__)
// FIXME consider non one-hour DST change
#if !defined(__CYGWIN__)
#error please add daylight savings offset here!
#endif
return _timezone / 60 - (t->tm_isdst > 0 ? 60 : 0);
# else
return timezone / 60 - (t->tm_isdst > 0 ? 60 : 0 );
# endif
#endif
}
// Converts a list of arguments sent to a Date member function into milliseconds, updating
// ms (representing milliseconds) and t (representing the rest of the date structure) appropriately.
//
// Format of member function: f([hour,] [min,] [sec,] [ms])
static void fillStructuresUsingTimeArgs(ExecState *exec, const List &args, int maxArgs, double *ms, struct tm *t)
{
double milliseconds = 0;
int idx = 0;
int numArgs = args.size();
// JS allows extra trailing arguments -- ignore them
if (numArgs > maxArgs)
numArgs = maxArgs;
// hours
if (maxArgs >= 4 && idx < numArgs) {
t->tm_hour = 0;
milliseconds += args[idx++].toInt32(exec) * msPerHour;
}
// minutes
if (maxArgs >= 3 && idx < numArgs) {
t->tm_min = 0;
milliseconds += args[idx++].toInt32(exec) * msPerMinute;
}
// seconds
if (maxArgs >= 2 && idx < numArgs) {
t->tm_sec = 0;
milliseconds += args[idx++].toInt32(exec) * msPerSecond;
}
// milliseconds
if (idx < numArgs) {
milliseconds += roundValue(exec, args[idx]);
} else {
milliseconds += *ms;
}
*ms = milliseconds;
}
// Converts a list of arguments sent to a Date member function into years, months, and milliseconds, updating
// ms (representing milliseconds) and t (representing the rest of the date structure) appropriately.
//
// Format of member function: f([years,] [months,] [days])
static void fillStructuresUsingDateArgs(ExecState *exec, const List &args, int maxArgs, double *ms, struct tm *t)
{
int idx = 0;
int numArgs = args.size();
// JS allows extra trailing arguments -- ignore them
if (numArgs > maxArgs)
numArgs = maxArgs;
// years
if (maxArgs >= 3 && idx < numArgs) {
t->tm_year = args[idx++].toInt32(exec) - 1900;
}
// months
if (maxArgs >= 2 && idx < numArgs) {
t->tm_mon = args[idx++].toInt32(exec);
}
// days
if (idx < numArgs) {
t->tm_mday = 0;
*ms += args[idx].toInt32(exec) * msPerDay;
}
}
// ------------------------------ DateInstanceImp ------------------------------
const ClassInfo DateInstanceImp::info = {"Date", 0, 0, 0};
DateInstanceImp::DateInstanceImp(ObjectImp *proto)
: ObjectImp(proto)
{
}
// ------------------------------ DatePrototypeImp -----------------------------
const ClassInfo DatePrototypeImp::info = {"Date", &DateInstanceImp::info, &dateTable, 0};
/* Source for date_object.lut.h
We use a negative ID to denote the "UTC" variant.
@begin dateTable 61
toString DateProtoFuncImp::ToString DontEnum|Function 0
toUTCString DateProtoFuncImp::ToUTCString DontEnum|Function 0
toDateString DateProtoFuncImp::ToDateString DontEnum|Function 0
toTimeString DateProtoFuncImp::ToTimeString DontEnum|Function 0
toLocaleString DateProtoFuncImp::ToLocaleString DontEnum|Function 0
toLocaleDateString DateProtoFuncImp::ToLocaleDateString DontEnum|Function 0
toLocaleTimeString DateProtoFuncImp::ToLocaleTimeString DontEnum|Function 0
valueOf DateProtoFuncImp::ValueOf DontEnum|Function 0
getTime DateProtoFuncImp::GetTime DontEnum|Function 0
getFullYear DateProtoFuncImp::GetFullYear DontEnum|Function 0
getUTCFullYear -DateProtoFuncImp::GetFullYear DontEnum|Function 0
toGMTString DateProtoFuncImp::ToGMTString DontEnum|Function 0
getMonth DateProtoFuncImp::GetMonth DontEnum|Function 0
getUTCMonth -DateProtoFuncImp::GetMonth DontEnum|Function 0
getDate DateProtoFuncImp::GetDate DontEnum|Function 0
getUTCDate -DateProtoFuncImp::GetDate DontEnum|Function 0
getDay DateProtoFuncImp::GetDay DontEnum|Function 0
getUTCDay -DateProtoFuncImp::GetDay DontEnum|Function 0
getHours DateProtoFuncImp::GetHours DontEnum|Function 0
getUTCHours -DateProtoFuncImp::GetHours DontEnum|Function 0
getMinutes DateProtoFuncImp::GetMinutes DontEnum|Function 0
getUTCMinutes -DateProtoFuncImp::GetMinutes DontEnum|Function 0
getSeconds DateProtoFuncImp::GetSeconds DontEnum|Function 0
getUTCSeconds -DateProtoFuncImp::GetSeconds DontEnum|Function 0
getMilliseconds DateProtoFuncImp::GetMilliSeconds DontEnum|Function 0
getUTCMilliseconds -DateProtoFuncImp::GetMilliSeconds DontEnum|Function 0
getTimezoneOffset DateProtoFuncImp::GetTimezoneOffset DontEnum|Function 0
setTime DateProtoFuncImp::SetTime DontEnum|Function 1
setMilliseconds DateProtoFuncImp::SetMilliSeconds DontEnum|Function 1
setUTCMilliseconds -DateProtoFuncImp::SetMilliSeconds DontEnum|Function 1
setSeconds DateProtoFuncImp::SetSeconds DontEnum|Function 2
setUTCSeconds -DateProtoFuncImp::SetSeconds DontEnum|Function 2
setMinutes DateProtoFuncImp::SetMinutes DontEnum|Function 3
setUTCMinutes -DateProtoFuncImp::SetMinutes DontEnum|Function 3
setHours DateProtoFuncImp::SetHours DontEnum|Function 4
setUTCHours -DateProtoFuncImp::SetHours DontEnum|Function 4
setDate DateProtoFuncImp::SetDate DontEnum|Function 1
setUTCDate -DateProtoFuncImp::SetDate DontEnum|Function 1
setMonth DateProtoFuncImp::SetMonth DontEnum|Function 2
setUTCMonth -DateProtoFuncImp::SetMonth DontEnum|Function 2
setFullYear DateProtoFuncImp::SetFullYear DontEnum|Function 3
setUTCFullYear -DateProtoFuncImp::SetFullYear DontEnum|Function 3
setYear DateProtoFuncImp::SetYear DontEnum|Function 1
getYear DateProtoFuncImp::GetYear DontEnum|Function 0
toGMTString DateProtoFuncImp::ToGMTString DontEnum|Function 0
@end
*/
// ECMA 15.9.4
DatePrototypeImp::DatePrototypeImp(ExecState *,
ObjectPrototypeImp *objectProto)
: DateInstanceImp(objectProto)
{
Value protect(this);
setInternalValue(Number(NaN));
// The constructor will be added later, after DateObjectImp has been built
}
Value DatePrototypeImp::get(ExecState *exec, const Identifier &propertyName) const
{
return lookupGetFunction<DateProtoFuncImp, ObjectImp>( exec, propertyName, &dateTable, this );
}
// ------------------------------ DateProtoFuncImp -----------------------------
DateProtoFuncImp::DateProtoFuncImp(ExecState *exec, int i, int len)
: InternalFunctionImp(
static_cast<FunctionPrototypeImp*>(exec->lexicalInterpreter()->builtinFunctionPrototype().imp())
), id(abs(i)), utc(i<0)
// We use a negative ID to denote the "UTC" variant.
{
Value protect(this);
putDirect(lengthPropertyName, len, DontDelete|ReadOnly|DontEnum);
}
bool DateProtoFuncImp::implementsCall() const
{
return true;
}
Value DateProtoFuncImp::call(ExecState *exec, Object &thisObj, const List &args)
{
if (!thisObj.inherits(&DateInstanceImp::info)) {
// non-generic function called on non-date object
// ToString and ValueOf are generic according to the spec, but the mozilla
// tests suggest otherwise...
Object err = Error::create(exec,TypeError);
exec->setException(err);
return err;
}
Value result;
UString s;
const int bufsize=100;
char timebuffer[bufsize];
CString oldlocale = setlocale(LC_TIME,NULL);
if (!oldlocale.c_str())
oldlocale = setlocale(LC_ALL, NULL);
Value v = thisObj.internalValue();
double milli = v.toNumber(exec);
// special case: time value is NaN
if (isNaN(milli)) {
switch (id) {
case ToString:
case ToDateString:
case ToTimeString:
case ToGMTString:
case ToUTCString:
case ToLocaleString:
case ToLocaleDateString:
case ToLocaleTimeString:
return String("Invalid Date");
case ValueOf:
case GetTime:
case GetYear:
case GetFullYear:
case GetMonth:
case GetDate:
case GetDay:
case GetHours:
case GetMinutes:
case GetSeconds:
case GetMilliSeconds:
case GetTimezoneOffset:
case SetMilliSeconds:
case SetSeconds:
case SetMinutes:
case SetHours:
case SetDate:
case SetMonth:
case SetFullYear:
return Number(NaN);
}
}
if (id == SetTime) {
result = Number(roundValue(exec,args[0]));
thisObj.setInternalValue(result);
return result;
}
// check whether time value is outside time_t's usual range
// make the necessary transformations if necessary
int realYearOffset = 0;
double milliOffset = 0.0;
if (milli < 0 || milli >= timeFromYear(2038)) {
// ### ugly and probably not very precise
int realYear = yearFromTime(milli);
int base = daysInYear(realYear) == 365 ? 2001 : 2000;
milliOffset = timeFromYear(base) - timeFromYear(realYear);
milli += milliOffset;
realYearOffset = realYear - base;
}
time_t tv = (time_t) floor(milli / 1000.0);
double ms = milli - tv * 1000.0;
struct tm *t;
if ( (id == DateProtoFuncImp::ToGMTString) ||
(id == DateProtoFuncImp::ToUTCString) )
t = gmtime(&tv);
else if (id == DateProtoFuncImp::ToString)
t = localtime(&tv);
else if (utc)
t = gmtime(&tv);
else
t = localtime(&tv);
// we had an out of range year. use that one (plus/minus offset
// found by calculating tm_year) and fix the week day calculation
if (realYearOffset != 0) {
t->tm_year += realYearOffset;
milli -= milliOffset;
// our own weekday calculation. beware of need for local time.
double m = milli;
if (!utc)
m -= timeZoneOffset(t) * msPerMinute;
t->tm_wday = weekDay(m);
}
// trick gcc. We don't want the Y2K warnings.
const char xFormat[] = "%x";
const char cFormat[] = "%c";
switch (id) {
case ToString:
result = String(formatDate(*t) + " " + formatTime(*t));
break;
case ToDateString:
result = String(formatDate(*t));
break;
case ToTimeString:
result = String(formatTime(*t));
break;
case ToGMTString:
case ToUTCString:
result = String(formatDateUTCVariant(*t) + " " + formatTime(*t));
break;
case ToLocaleString:
strftime(timebuffer, bufsize, cFormat, t);
result = String(timebuffer);
break;
case ToLocaleDateString:
strftime(timebuffer, bufsize, xFormat, t);
result = String(timebuffer);
break;
case ToLocaleTimeString:
strftime(timebuffer, bufsize, "%X", t);
result = String(timebuffer);
break;
case ValueOf:
result = Number(milli);
break;
case GetTime:
result = Number(milli);
break;
case GetYear:
// IE returns the full year even in getYear.
if ( exec->dynamicInterpreter()->compatMode() != Interpreter::IECompat )
result = Number(t->tm_year);
else
result = Number(1900 + t->tm_year);
break;
case GetFullYear:
result = Number(1900 + t->tm_year);
break;
case GetMonth:
result = Number(t->tm_mon);
break;
case GetDate:
result = Number(t->tm_mday);
break;
case GetDay:
result = Number(t->tm_wday);
break;
case GetHours:
result = Number(t->tm_hour);
break;
case GetMinutes:
result = Number(t->tm_min);
break;
case GetSeconds:
result = Number(t->tm_sec);
break;
case GetMilliSeconds:
result = Number(ms);
break;
case GetTimezoneOffset:
result = Number(timeZoneOffset(t));
break;
case SetMilliSeconds:
fillStructuresUsingTimeArgs(exec, args, 1, &ms, t);
break;
case SetSeconds:
fillStructuresUsingTimeArgs(exec, args, 2, &ms, t);
break;
case SetMinutes:
fillStructuresUsingTimeArgs(exec, args, 3, &ms, t);
break;
case SetHours:
fillStructuresUsingTimeArgs(exec, args, 4, &ms, t);
break;
case SetDate:
fillStructuresUsingDateArgs(exec, args, 1, &ms, t);
break;
case SetMonth:
fillStructuresUsingDateArgs(exec, args, 2, &ms, t);
break;
case SetFullYear:
fillStructuresUsingDateArgs(exec, args, 3, &ms, t);
break;
case SetYear:
int y = args[0].toInt32(exec);
if (y < 1900) {
if (y >= 0 && y <= 99) {
t->tm_year = y;
} else {
fillStructuresUsingDateArgs(exec, args, 3, &ms, t);
}
} else {
t->tm_year = y - 1900;
}
break;
}
if (id == SetYear || id == SetMilliSeconds || id == SetSeconds ||
id == SetMinutes || id == SetHours || id == SetDate ||
id == SetMonth || id == SetFullYear ) {
result = Number(makeTime(t, ms, utc));
thisObj.setInternalValue(result);
}
return result;
}
// ------------------------------ DateObjectImp --------------------------------
// TODO: MakeTime (15.9.11.1) etc. ?
DateObjectImp::DateObjectImp(ExecState *exec,
FunctionPrototypeImp *funcProto,
DatePrototypeImp *dateProto)
: InternalFunctionImp(funcProto)
{
Value protect(this);
// ECMA 15.9.4.1 Date.prototype
putDirect(prototypePropertyName, dateProto, DontEnum|DontDelete|ReadOnly);
static const Identifier parsePropertyName("parse");
putDirect(parsePropertyName, new DateObjectFuncImp(exec,funcProto,DateObjectFuncImp::Parse, 1), DontEnum);
static const Identifier UTCPropertyName("UTC");
putDirect(UTCPropertyName, new DateObjectFuncImp(exec,funcProto,DateObjectFuncImp::UTC, 7), DontEnum);
// no. of arguments for constructor
putDirect(lengthPropertyName, 7, ReadOnly|DontDelete|DontEnum);
}
bool DateObjectImp::implementsConstruct() const
{
return true;
}
// ECMA 15.9.3
Object DateObjectImp::construct(ExecState *exec, const List &args)
{
int numArgs = args.size();
#ifdef KJS_VERBOSE
fprintf(stderr,"DateObjectImp::construct - %d args\n", numArgs);
#endif
double value;
if (numArgs == 0) { // new Date() ECMA 15.9.3.3
#ifdef HAVE_SYS_TIMEB_H
# if defined(__BORLANDC__)
struct timeb timebuffer;
ftime(&timebuffer);
# else
struct _timeb timebuffer;
_ftime(&timebuffer);
# endif
double utc = floor((double)timebuffer.time * 1000.0 + (double)timebuffer.millitm);
#else
struct timeval tv;
gettimeofday(&tv, 0L);
double utc = floor((double)tv.tv_sec * 1000.0 + (double)tv.tv_usec / 1000.0);
#endif
value = utc;
} else if (numArgs == 1) {
Value prim = args[0].toPrimitive(exec);
if (prim.isA(StringType))
value = parseDate(prim.toString(exec));
else
value = prim.toNumber(exec);
} else {
if (isNaN(args[0].toNumber(exec))
|| isNaN(args[1].toNumber(exec))
|| (numArgs >= 3 && isNaN(args[2].toNumber(exec)))
|| (numArgs >= 4 && isNaN(args[3].toNumber(exec)))
|| (numArgs >= 5 && isNaN(args[4].toNumber(exec)))
|| (numArgs >= 6 && isNaN(args[5].toNumber(exec)))
|| (numArgs >= 7 && isNaN(args[6].toNumber(exec)))) {
value = NaN;
} else {
struct tm t;
memset(&t, 0, sizeof(t));
int year = args[0].toInt32(exec);
t.tm_year = (year >= 0 && year <= 99) ? year : year - 1900;
t.tm_mon = args[1].toInt32(exec);
t.tm_mday = (numArgs >= 3) ? args[2].toInt32(exec) : 1;
t.tm_hour = (numArgs >= 4) ? args[3].toInt32(exec) : 0;
t.tm_min = (numArgs >= 5) ? args[4].toInt32(exec) : 0;
t.tm_sec = (numArgs >= 6) ? args[5].toInt32(exec) : 0;
t.tm_isdst = -1;
int ms = (numArgs >= 7) ? args[6].toInt32(exec) : 0;
value = makeTime(&t, ms, false);
}
}
Object proto = exec->lexicalInterpreter()->builtinDatePrototype();
Object ret(new DateInstanceImp(proto.imp()));
ret.setInternalValue(Number(timeClip(value)));
return ret;
}
bool DateObjectImp::implementsCall() const
{
return true;
}
// ECMA 15.9.2
Value DateObjectImp::call(ExecState* /*exec*/, Object &/*thisObj*/, const List &/*args*/)
{
#ifdef KJS_VERBOSE
fprintf(stderr,"DateObjectImp::call - current time\n");
#endif
time_t t = time(0L);
// FIXME: not threadsafe
struct tm *tm = localtime(&t);
return String(formatDate(*tm) + " " + formatTime(*tm));
}
// ------------------------------ DateObjectFuncImp ----------------------------
DateObjectFuncImp::DateObjectFuncImp(ExecState* /*exec*/, FunctionPrototypeImp *funcProto,
int i, int len)
: InternalFunctionImp(funcProto), id(i)
{
Value protect(this);
putDirect(lengthPropertyName, len, DontDelete|ReadOnly|DontEnum);
}
bool DateObjectFuncImp::implementsCall() const
{
return true;
}
// ECMA 15.9.4.2 - 3
Value DateObjectFuncImp::call(ExecState *exec, Object &/*thisObj*/, const List &args)
{
if (id == Parse) {
return Number(parseDate(args[0].toString(exec)));
} else { // UTC
int n = args.size();
if (isNaN(args[0].toNumber(exec))
|| isNaN(args[1].toNumber(exec))
|| (n >= 3 && isNaN(args[2].toNumber(exec)))
|| (n >= 4 && isNaN(args[3].toNumber(exec)))
|| (n >= 5 && isNaN(args[4].toNumber(exec)))
|| (n >= 6 && isNaN(args[5].toNumber(exec)))
|| (n >= 7 && isNaN(args[6].toNumber(exec)))) {
return Number(NaN);
}
struct tm t;
memset(&t, 0, sizeof(t));
int year = args[0].toInt32(exec);
t.tm_year = (year >= 0 && year <= 99) ? year : year - 1900;
t.tm_mon = args[1].toInt32(exec);
t.tm_mday = (n >= 3) ? args[2].toInt32(exec) : 1;
t.tm_hour = (n >= 4) ? args[3].toInt32(exec) : 0;
t.tm_min = (n >= 5) ? args[4].toInt32(exec) : 0;
t.tm_sec = (n >= 6) ? args[5].toInt32(exec) : 0;
int ms = (n >= 7) ? args[6].toInt32(exec) : 0;
return Number(makeTime(&t, ms, true));
}
}
// -----------------------------------------------------------------------------
double KJS::parseDate(const UString &u)
{
#ifdef KJS_VERBOSE
fprintf(stderr,"KJS::parseDate %s\n",u.ascii());
#endif
double /*time_t*/ seconds = KRFCDate_parseDate( u );
return seconds == invalidDate ? NaN : seconds * 1000.0;
}
static double ymdhms_to_seconds(int year, int mon, int day, int hour, int minute, int second)
{
//printf("year=%d month=%d day=%d hour=%d minute=%d second=%d\n", year, mon, day, hour, minute, second);
double ret = (day - 32075) /* days */
+ 1461L * (year + 4800L + (mon - 14) / 12) / 4
+ 367 * (mon - 2 - (mon - 14) / 12 * 12) / 12
- 3 * ((year + 4900L + (mon - 14) / 12) / 100) / 4
- 2440588;
ret = 24*ret + hour; /* hours */
ret = 60*ret + minute; /* minutes */
ret = 60*ret + second; /* seconds */
return ret;
}
// we follow the recommendation of rfc2822 to consider all
// obsolete time zones not listed here equivalent to "-0000"
static const struct KnownZone {
#ifdef _WIN32
char tzName[4];
#else
const char tzName[4];
#endif
int tzOffset;
} known_zones[] = {
{ "UT", 0 },
{ "GMT", 0 },
{ "EST", -300 },
{ "EDT", -240 },
{ "CST", -360 },
{ "CDT", -300 },
{ "MST", -420 },
{ "MDT", -360 },
{ "PST", -480 },
{ "PDT", -420 }
};
double KJS::makeTime(struct tm *t, double ms, bool utc)
{
int utcOffset;
if (utc) {
time_t zero = 0;
#if defined BSD || defined(__linux__) || defined(__APPLE__)
struct tm t3;
localtime_r(&zero, &t3);
utcOffset = t3.tm_gmtoff;
t->tm_isdst = t3.tm_isdst;
#else
(void)localtime(&zero);
# if defined(__BORLANDC__) || defined(__CYGWIN__)
utcOffset = - _timezone;
# else
utcOffset = - timezone;
# endif
t->tm_isdst = 0;
#endif
} else {
utcOffset = 0;
t->tm_isdst = -1;
}
double yearOffset = 0.0;
if (t->tm_year < (1970 - 1900) || t->tm_year > (2038 - 1900)) {
// we'll fool mktime() into believing that this year is within
// its normal, portable range (1970-2038) by setting tm_year to
// 2000 or 2001 and adding the difference in milliseconds later.
// choice between offset will depend on whether the year is a
// leap year or not.
int y = t->tm_year + 1900;
int baseYear = daysInYear(y) == 365 ? 2001 : 2000;
const double baseTime = timeFromYear(baseYear);
yearOffset = timeFromYear(y) - baseTime;
t->tm_year = baseYear - 1900;
}
// Determine if we passed over a DST change boundary
if (!utc) {
time_t tval = mktime(t) + utcOffset + int((ms + yearOffset)/1000);
struct tm t3;
localtime_r(&tval, &t3);
t->tm_isdst = t3.tm_isdst;
}
return (mktime(t) + utcOffset) * 1000.0 + ms + yearOffset;
}
// returns 0-11 (Jan-Dec); -1 on failure
static int findMonth(const char *monthStr)
{
assert(monthStr);
static const char haystack[37] = "janfebmaraprmayjunjulaugsepoctnovdec";
char needle[4];
for (int i = 0; i < 3; ++i) {
if (!*monthStr)
return -1;
needle[i] = tolower(*monthStr++);
}
needle[3] = '\0';
const char *str = strstr(haystack, needle);
if (str) {
int position = str - haystack;
if (position % 3 == 0) {
return position / 3;
}
}
return -1;
}
// maybe this should be more often than just isspace() but beware of
// conflicts with : in time strings.
static bool isSpaceLike(char c)
{
return isspace(c) || c == ',' || c == ':' || c == '-';
}
double KJS::KRFCDate_parseDate(const UString &_date)
{
// This parse a date in the form:
// Wednesday, 09-Nov-99 23:12:40 GMT
// or
// Sat, 01-Jan-2000 08:00:00 GMT
// or
// Sat, 01 Jan 2000 08:00:00 GMT
// or
// 01 Jan 99 22:00 +0100 (exceptions in rfc822/rfc2822)
// ### non RFC formats, added for Javascript:
// [Wednesday] January 09 1999 23:12:40 GMT
// [Wednesday] January 09 23:12:40 GMT 1999
//
// We ignore the weekday
//
double result = -1;
int offset = 0;
bool have_tz = false;
char *newPosStr;
const char *dateString = _date.ascii();
int day = 0;
int month = -1; // not set yet
int year = 0;
int hour = 0;
int minute = 0;
int second = 0;
bool have_time = false;
// Skip leading space
while(*dateString && isSpaceLike(*dateString))
dateString++;
const char *wordStart = dateString;
// Check contents of first words if not number
while(*dateString && !isdigit(*dateString))
{
if (isSpaceLike(*dateString) && dateString - wordStart >= 3)
{
month = findMonth(wordStart);
while(*dateString && isSpaceLike(*dateString))
dateString++;
wordStart = dateString;
}
else
dateString++;
}
// missing delimiter between month and day (like "January29")?
if (month == -1 && dateString && wordStart != dateString) {
month = findMonth(wordStart);
// TODO: emit warning about dubious format found
}
while(*dateString && isSpaceLike(*dateString))
dateString++;
if (!*dateString)
return invalidDate;
// ' 09-Nov-99 23:12:40 GMT'
errno = 0;
day = strtol(dateString, &newPosStr, 10);
if (errno)
return invalidDate;
dateString = newPosStr;
if (!*dateString)
return invalidDate;
if (day < 0)
return invalidDate;
if (day > 31) {
// ### where is the boundary and what happens below?
if (*dateString == '/') {
// looks like a YYYY/MM/DD date
if (!*++dateString)
return invalidDate;
year = day;
month = strtol(dateString, &newPosStr, 10) - 1;
if (errno)
return invalidDate;
dateString = newPosStr;
if (*dateString++ != '/' || !*dateString)
return invalidDate;
day = strtol(dateString, &newPosStr, 10);
if (errno)
return invalidDate;
dateString = newPosStr;
} else {
return invalidDate;
}
} else if (*dateString == '/' && month == -1)
{
dateString++;
// This looks like a MM/DD/YYYY date, not an RFC date.....
month = day - 1; // 0-based
day = strtol(dateString, &newPosStr, 10);
if (errno)
return invalidDate;
dateString = newPosStr;
if (*dateString == '/')
dateString++;
if (!*dateString)
return invalidDate;
//printf("month=%d day=%d dateString=%s\n", month, day, dateString);
}
else
{
if (*dateString == '-')
dateString++;
while(*dateString && isSpaceLike(*dateString))
dateString++;
if (*dateString == ',')
dateString++;
if ( month == -1 ) // not found yet
{
month = findMonth(dateString);
if (month == -1)
return invalidDate;
while(*dateString && (*dateString != '-') && !isSpaceLike(*dateString))
dateString++;
if (!*dateString)
return invalidDate;
// '-99 23:12:40 GMT'
if ((*dateString != '-') && (*dateString != '/') && !isspace(*dateString))
return invalidDate;
dateString++;
}
if ((month < 0) || (month > 11))
return invalidDate;
}
// '99 23:12:40 GMT'
if (year <= 0 && *dateString) {
year = strtol(dateString, &newPosStr, 10);
if (errno)
return invalidDate;
}
// Don't fail if the time is missing.
if (*newPosStr)
{
// ' 23:12:40 GMT'
if (*newPosStr == ':') // Ah, so there was no year, but the number was the hour
year = -1;
else if (isSpaceLike(*newPosStr)) // we parsed the year
dateString = ++newPosStr;
else
return invalidDate;
hour = strtol(dateString, &newPosStr, 10);
// Do not check for errno here since we want to continue
// even if errno was set becasue we are still looking
// for the timezone!
// read a number? if not this might be a timezone name
if (newPosStr != dateString) {
have_time = true;
dateString = newPosStr;
if ((hour < 0) || (hour > 23))
return invalidDate;
if (!*dateString)
return invalidDate;
// ':12:40 GMT'
if (*dateString++ != ':')
return invalidDate;
minute = strtol(dateString, &newPosStr, 10);
if (errno)
return invalidDate;
dateString = newPosStr;
if ((minute < 0) || (minute > 59))
return invalidDate;
// ':40 GMT'
if (*dateString && *dateString != ':' && !isspace(*dateString))
return invalidDate;
// seconds are optional in rfc822 + rfc2822
if (*dateString ==':') {
dateString++;
second = strtol(dateString, &newPosStr, 10);
if (errno)
return invalidDate;
dateString = newPosStr;
if ((second < 0) || (second > 59))
return invalidDate;
// disallow trailing colon seconds
if (*dateString == ':')
return invalidDate;
}
while(*dateString && isspace(*dateString))
dateString++;
if (strncasecmp(dateString, "AM", 2) == 0) {
if (hour > 12)
return invalidDate;
if (hour == 12)
hour = 0;
dateString += 2;
while (isspace(*dateString))
dateString++;
} else if (strncasecmp(dateString, "PM", 2) == 0) {
if (hour > 12)
return invalidDate;
if (hour != 12)
hour += 12;
dateString += 2;
while (isspace(*dateString))
dateString++;
}
}
} else {
dateString = newPosStr;
}
// don't fail if the time zone is missing, some
// broken mail-/news-clients omit the time zone
if (*dateString) {
if (strncasecmp(dateString, "GMT", 3) == 0 ||
strncasecmp(dateString, "UTC", 3) == 0)
{
dateString += 3;
have_tz = true;
}
while (*dateString && isspace(*dateString))
++dateString;
if (strncasecmp(dateString, "GMT", 3) == 0) {
dateString += 3;
}
if ((*dateString == '+') || (*dateString == '-')) {
offset = strtol(dateString, &newPosStr, 10);
if (errno)
return invalidDate;
dateString = newPosStr;
if ((offset < -9959) || (offset > 9959))
return invalidDate;
int sgn = (offset < 0)? -1:1;
offset = abs(offset);
if ( *dateString == ':' ) { // GMT+05:00
int offset2 = strtol(dateString, &newPosStr, 10);
if (errno)
return invalidDate;
dateString = newPosStr;
offset = (offset*60 + offset2)*sgn;
}
else
offset = ((offset / 100)*60 + (offset % 100))*sgn;
have_tz = true;
} else {
for (int i=0; i < int(sizeof(known_zones)/sizeof(KnownZone)); i++) {
if (0 == strncasecmp(dateString, known_zones[i].tzName, strlen(known_zones[i].tzName))) {
offset = known_zones[i].tzOffset;
dateString += strlen(known_zones[i].tzName);
have_tz = true;
break;
}
}
}
}
while(*dateString && isspace(*dateString))
dateString++;
if ( *dateString && year == -1 ) {
year = strtol(dateString, &newPosStr, 10);
if (errno)
return invalidDate;
dateString = newPosStr;
}
while (isspace(*dateString))
dateString++;
#if 0
// Trailing garbage
if (*dateString != '\0')
return invalidDate;
#endif
// Y2K: Solve 2 digit years
if ((year >= 0) && (year < 50))
year += 2000;
if ((year >= 50) && (year < 100))
year += 1900; // Y2K
if (!have_tz) {
// fall back to midnight, local timezone
struct tm t;
memset(&t, 0, sizeof(tm));
t.tm_mday = day;
t.tm_mon = month;
t.tm_year = year - 1900;
t.tm_isdst = -1;
if (have_time) {
t.tm_sec = second;
t.tm_min = minute;
t.tm_hour = hour;
}
// better not use mktime() as it can't handle the full year range
return makeTime(&t, 0, false) / 1000.0;
}
result = ymdhms_to_seconds(year, month+1, day, hour, minute, second) - offset*60;
return result;
}
double KJS::timeClip(double t)
{
if (isInf(t))
return NaN;
double at = fabs(t);
if (at > 8.64E15)
return NaN;
return floor(at) * (t != at ? -1 : 1);
}
KJS::Value
Value objects are act as wrappers ("smart pointers") around ValueImp objects and their descendents...
Definition: value.h:168
KJS::InternalFunctionImp
Base class for all function objects.
Definition: function.h:41
KJS::ExecState::dynamicInterpreter
Interpreter * dynamicInterpreter() const
Returns the interpreter associated with this execution state.
Definition: interpreter.h:453
KJS::Number
Represents an primitive Number value.
Definition: value.h:368
KJS::ExecState::lexicalInterpreter
Interpreter * lexicalInterpreter() const
Returns the interpreter associated with the current scope's global object.
Definition: interpreter.cpp:395
KJS::Object::setInternalValue
void setInternalValue(const Value &v)
Sets the internal value of the object.
Definition: object.h:721
KJS::Interpreter::builtinDatePrototype
Object builtinDatePrototype() const
Returns the builtin "Date.prototype" object.
Definition: interpreter.cpp:249
KJS::CString
8 bit char based string class
Definition: ustring.h:165
KJS::Error::create
static Object create(ExecState *exec, ErrorType errtype=GeneralError, const char *message=0, int lineno=-1, int sourceId=-1)
Factory method for error objects.
Definition: object.cpp:504
KJS::FunctionPrototypeImp
The initial value of Function.prototype (and thus all objects created with the Function constructor) ...
Definition: function_object.h:35
KJS::Value::toNumber
double toNumber(ExecState *exec) const
Performs the ToNumber type conversion operation on this value (ECMA 9.3)
Definition: value.h:222
KJS::Object
Represents an Object.
Definition: object.h:82
KJS::Value::isA
bool isA(Type t) const
Checks whether or not the value is of a particular tpye.
Definition: value.h:204
KJS::UString
Unicode string class.
Definition: ustring.h:189
KJS::String
Represents an primitive String value.
Definition: value.h:341
KJS::Object::internalValue
Value internalValue() const
Returns the internal value of the object.
Definition: object.h:718
KJS::List::size
int size() const
Definition: list.h:90
KJS::List
Native list type.
Definition: list.h:48
KJS::Value::toString
UString toString(ExecState *exec) const
Performs the ToString type conversion operation on this value (ECMA 9.8)
Definition: value.h:247
KJS::ClassInfo
Class Information.
Definition: object.h:59
KJS::UString::ascii
char * ascii() const
Convert the Unicode string to plain ASCII chars chopping of any higher bytes.
Definition: ustring.cpp:486
KJS::ExecState
Represents the current state of script execution.
Definition: interpreter.h:439
KJS::Identifier
Represents an Identifier for a Javascript object.
Definition: identifier.h:32

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