зеркало из https://github.com/mozilla/gecko-dev.git
Optimizations in NativeDate mostly to reduce amount of various format strings runtime has to initialize.
This commit is contained in:
igor%mir2.org
Родитель
041b2238be
Коммит
6fb4e51cdf
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@ -156,7 +156,7 @@ final class NativeDate extends IdScriptable {
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return wrap_double(jsStaticFunction_UTC(args));
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case ConstructorId_parse:
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return wrap_double(jsStaticFunction_parse
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return wrap_double(date_parseString
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(ScriptRuntime.toString(args, 0)));
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case Id_constructor:
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@ -457,12 +457,9 @@ final class NativeDate extends IdScriptable {
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if (TimeFromYear(mid) > t) {
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hi = mid - 1;
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} else {
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if (TimeFromYear(mid) <= t) {
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int temp = mid + 1;
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if (TimeFromYear(temp) > t) {
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return mid;
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}
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lo = mid + 1;
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lo = mid + 1;
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if (TimeFromYear(lo) > t) {
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return mid;
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}
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}
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}
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@ -808,34 +805,33 @@ final class NativeDate extends IdScriptable {
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10000 + 8 * 60, 10000 + 7 * 60
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};
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/* helper for date_parse */
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private static boolean date_regionMatches(String s1, int s1off,
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/** helper for date_parse, return true if matches, otherwise, false */
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private static boolean date_regionMatches(String pattern,
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String s2, int s2off,
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int count)
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{
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boolean result = false;
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/* return true if matches, otherwise, false */
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int s1len = s1.length();
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int s1off = 0;
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int s1len = pattern.length();
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int s2len = s2.length();
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while (count > 0 && s1off < s1len && s2off < s2len) {
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if (Character.toLowerCase(s1.charAt(s1off)) !=
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Character.toLowerCase(s2.charAt(s2off)))
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break;
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while (count > 0) {
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if (s1off >= s1len || s2off >= s2len) {
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return false;
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}
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int c = s2.charAt(s2off);
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if ('A' <= c && c <= 'Z') { c += 'a' - 'A'; }
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if (pattern.charAt(s1off) != c) {
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return false;
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}
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s1off++;
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s2off++;
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count--;
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}
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if (count == 0) {
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result = true;
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}
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return result;
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return true;
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}
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private static double date_parseString(String s) {
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double msec;
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int year = -1;
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int mon = -1;
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int mday = -1;
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@ -962,7 +958,7 @@ final class NativeDate extends IdScriptable {
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if (i <= st + 1)
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return ScriptRuntime.NaN;
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for (k = wtb.length; --k >= 0;)
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if (date_regionMatches(wtb[k], 0, s, st, i-st)) {
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if (date_regionMatches(wtb[k], s, st, i-st)) {
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int action = ttb[k];
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if (action != 0) {
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if (action < 0) {
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@ -1004,19 +1000,13 @@ final class NativeDate extends IdScriptable {
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min = 0;
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if (hour < 0)
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hour = 0;
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double msec = date_msecFromDate(year, mon, mday, hour, min, sec, 0);
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if (tzoffset == -1) { /* no time zone specified, have to use local */
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double time;
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time = date_msecFromDate(year, mon, mday, hour, min, sec, 0);
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return internalUTC(time);
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return internalUTC(msec);
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} else {
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return msec + tzoffset * msPerMinute;
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}
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msec = date_msecFromDate(year, mon, mday, hour, min, sec, 0);
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msec += tzoffset * msPerMinute;
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return msec;
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}
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private static double jsStaticFunction_parse(String s) {
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return date_parseString(s);
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}
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private static final int FORMATSPEC_FULL = 0;
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@ -1030,65 +1020,47 @@ final class NativeDate extends IdScriptable {
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StringBuffer result = new StringBuffer(60);
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double local = LocalTime(t);
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/* offset from GMT in minutes. The offset includes daylight savings,
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if it applies. */
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int minutes = (int) Math.floor((LocalTZA + DaylightSavingTA(t))
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/ msPerMinute);
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/* map 510 minutes to 0830 hours */
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int offset = (minutes / 60) * 100 + minutes % 60;
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String dateStr = Integer.toString(DateFromTime(local));
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String hourStr = Integer.toString(HourFromTime(local));
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String minStr = Integer.toString(MinFromTime(local));
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String secStr = Integer.toString(SecFromTime(local));
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String offsetStr = Integer.toString(offset > 0 ? offset : -offset);
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int year = YearFromTime(local);
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String yearStr = Integer.toString(year > 0 ? year : -year);
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/* Tue Oct 31 09:41:40 GMT-0800 (PST) 2000 */
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/* Tue Oct 31 2000 */
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/* 09:41:40 GMT-0800 (PST) */
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if (format != FORMATSPEC_TIME) {
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result.append(days[WeekDay(local)]);
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appendWeekDayName(result, WeekDay(local));
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result.append(' ');
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result.append(months[MonthFromTime(local)]);
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if (dateStr.length() == 1)
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result.append(" 0");
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else
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result.append(' ');
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result.append(dateStr);
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appendMonthName(result, MonthFromTime(local));
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result.append(' ');
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if (year < 0)
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append0PaddedUint(result, DateFromTime(local), 2);
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result.append(' ');
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int year = YearFromTime(local);
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if (year < 0) {
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result.append('-');
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for (int i = yearStr.length(); i < 4; i++)
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result.append('0');
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result.append(yearStr);
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year = -year;
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}
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append0PaddedUint(result, year, 4);
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if (format != FORMATSPEC_DATE)
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result.append(' ');
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}
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if (format != FORMATSPEC_DATE) {
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if (hourStr.length() == 1)
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result.append('0');
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result.append(hourStr);
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if (minStr.length() == 1)
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result.append(":0");
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else
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result.append(':');
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result.append(minStr);
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if (secStr.length() == 1)
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result.append(":0");
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else
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result.append(':');
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result.append(secStr);
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if (offset > 0)
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append0PaddedUint(result, HourFromTime(local), 2);
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result.append(':');
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append0PaddedUint(result, MinFromTime(local), 2);
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result.append(':');
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append0PaddedUint(result, SecFromTime(local), 2);
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// offset from GMT in minutes. The offset includes daylight
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// savings, if it applies.
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int minutes = (int) Math.floor((LocalTZA + DaylightSavingTA(t))
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/ msPerMinute);
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// map 510 minutes to 0830 hours
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int offset = (minutes / 60) * 100 + minutes % 60;
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if (offset > 0) {
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result.append(" GMT+");
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else
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} else {
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result.append(" GMT-");
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for (int i = offsetStr.length(); i < 4; i++)
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result.append('0');
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result.append(offsetStr);
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offset = -offset;
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}
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append0PaddedUint(result, offset, 4);
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if (timeZoneFormatter == null)
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timeZoneFormatter = new java.text.SimpleDateFormat("zzz");
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@ -1100,7 +1072,6 @@ final class NativeDate extends IdScriptable {
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result.append(')');
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}
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}
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return result.toString();
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}
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@ -1177,15 +1148,6 @@ final class NativeDate extends IdScriptable {
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/* constants for toString, toUTCString */
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private static String js_NaN_date_str = "Invalid Date";
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private static String[] days = {
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"Sun","Mon","Tue","Wed","Thu","Fri","Sat"
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};
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private static String[] months = {
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"Jan", "Feb", "Mar", "Apr", "May", "Jun",
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"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
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};
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private static String toLocale_helper(double t,
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java.text.DateFormat formatter)
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{
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@ -1222,49 +1184,80 @@ final class NativeDate extends IdScriptable {
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private static String js_toUTCString(double date) {
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StringBuffer result = new StringBuffer(60);
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String dateStr = Integer.toString(DateFromTime(date));
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String hourStr = Integer.toString(HourFromTime(date));
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String minStr = Integer.toString(MinFromTime(date));
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String secStr = Integer.toString(SecFromTime(date));
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int year = YearFromTime(date);
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String yearStr = Integer.toString(year > 0 ? year : -year);
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result.append(days[WeekDay(date)]);
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appendWeekDayName(result, WeekDay(date));
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result.append(", ");
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if (dateStr.length() == 1)
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result.append('0');
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result.append(dateStr);
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append0PaddedUint(result, DateFromTime(date), 2);
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result.append(' ');
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result.append(months[MonthFromTime(date)]);
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if (year < 0)
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result.append(" -");
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else
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result.append(' ');
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int i;
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for (i = yearStr.length(); i < 4; i++)
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result.append('0');
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result.append(yearStr);
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if (hourStr.length() == 1)
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result.append(" 0");
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else
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result.append(' ');
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result.append(hourStr);
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if (minStr.length() == 1)
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result.append(":0");
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else
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result.append(':');
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result.append(minStr);
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if (secStr.length() == 1)
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result.append(":0");
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else
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result.append(':');
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result.append(secStr);
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appendMonthName(result, MonthFromTime(date));
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result.append(' ');
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int year = YearFromTime(date);
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if (year < 0) {
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result.append('-'); year = -year;
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}
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append0PaddedUint(result, year, 4);
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result.append(' ');
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append0PaddedUint(result, HourFromTime(date), 2);
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result.append(':');
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append0PaddedUint(result, MinFromTime(date), 2);
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result.append(':');
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append0PaddedUint(result, SecFromTime(date), 2);
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result.append(" GMT");
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return result.toString();
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}
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private static void append0PaddedUint(StringBuffer sb, int i, int minWidth)
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{
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if (i < 0) Context.codeBug();
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int scale = 1;
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--minWidth;
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if (i >= 10) {
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if (i < 1000 * 1000 * 1000) {
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for (;;) {
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int newScale = scale * 10;
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if (i < newScale) { break; }
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--minWidth;
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scale = newScale;
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}
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} else {
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// Separated case not to check against 10 * 10^9 overflow
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minWidth -= 9;
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scale = 1000 * 1000 * 1000;
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}
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}
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while (minWidth > 0) {
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sb.append('0');
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--minWidth;
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}
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while (scale != 1) {
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sb.append((char)('0' + (i / scale)));
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i %= scale;
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scale /= 10;
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}
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sb.append((char)('0' + i));
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}
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private static void appendMonthName(StringBuffer sb, int index)
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{
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// Take advantage of the fact that all month abbreviations
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// have the same length to minimize amount of strings runtime has
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// to keep in memory
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String months = "Jan"+"Feb"+"Mar"+"Apr"+"May"+"Jun"
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+"Jul"+"Aug"+"Sep"+"Oct"+"Nov"+"Dec";
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index *= 3;
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for (int i = 0; i != 3; ++i) {
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sb.append(months.charAt(index + i));
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}
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}
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private static void appendWeekDayName(StringBuffer sb, int index)
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{
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String days = "Sun"+"Mon"+"Tue"+"Wed"+"Thu"+"Fri"+"Sat";
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index *= 3;
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for (int i = 0; i != 3; ++i) {
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sb.append(days.charAt(index + i));
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}
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}
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private static double js_getYear(Context cx, double date) {
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int result = YearFromTime(LocalTime(date));
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