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Diffstat (limited to 'js/src/vm/DateObject.h')
| -rw-r--r-- | js/src/vm/DateObject.h | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/js/src/vm/DateObject.h b/js/src/vm/DateObject.h new file mode 100644 index 000000000..682823765 --- /dev/null +++ b/js/src/vm/DateObject.h @@ -0,0 +1,95 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- + * vim: set ts=8 sts=4 et sw=4 tw=99: + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#ifndef vm_DateObject_h_ +#define vm_DateObject_h_ + +#include "jsobj.h" + +#include "js/Date.h" +#include "js/Value.h" + +namespace js { + +class DateObject : public NativeObject +{ + static const uint32_t UTC_TIME_SLOT = 0; + static const uint32_t TZA_SLOT = 1; + + /* + * Cached slots holding local properties of the date. + * These are undefined until the first actual lookup occurs + * and are reset to undefined whenever the date's time is modified. + */ + static const uint32_t COMPONENTS_START_SLOT = 2; + + static const uint32_t LOCAL_TIME_SLOT = COMPONENTS_START_SLOT + 0; + static const uint32_t LOCAL_YEAR_SLOT = COMPONENTS_START_SLOT + 1; + static const uint32_t LOCAL_MONTH_SLOT = COMPONENTS_START_SLOT + 2; + static const uint32_t LOCAL_DATE_SLOT = COMPONENTS_START_SLOT + 3; + static const uint32_t LOCAL_DAY_SLOT = COMPONENTS_START_SLOT + 4; + + /* + * Unlike the above slots that hold LocalTZA-adjusted component values, + * LOCAL_SECONDS_INTO_YEAR_SLOT holds a composite value that can be used + * to compute LocalTZA-adjusted hours, minutes, and seconds values. + * Specifically, LOCAL_SECONDS_INTO_YEAR_SLOT holds the number of + * LocalTZA-adjusted seconds into the year. Unix timestamps ignore leap + * seconds, so recovering hours/minutes/seconds requires only trivial + * division/modulus operations. + */ + static const uint32_t LOCAL_SECONDS_INTO_YEAR_SLOT = COMPONENTS_START_SLOT + 5; + + static const uint32_t RESERVED_SLOTS = LOCAL_SECONDS_INTO_YEAR_SLOT + 1; + + public: + static const Class class_; + static const Class protoClass_; + + JS::ClippedTime clippedTime() const { + double t = getFixedSlot(UTC_TIME_SLOT).toDouble(); + JS::ClippedTime clipped = JS::TimeClip(t); + MOZ_ASSERT(mozilla::NumbersAreIdentical(clipped.toDouble(), t)); + return clipped; + } + + const js::Value& UTCTime() const { + return getFixedSlot(UTC_TIME_SLOT); + } + + // Set UTC time to a given time and invalidate cached local time. + void setUTCTime(JS::ClippedTime t); + void setUTCTime(JS::ClippedTime t, MutableHandleValue vp); + + inline double cachedLocalTime(); + + // Cache the local time, year, month, and so forth of the object. + // If UTC time is not finite (e.g., NaN), the local time + // slots will be set to the UTC time without conversion. + void fillLocalTimeSlots(); + + static MOZ_ALWAYS_INLINE bool getTime_impl(JSContext* cx, const CallArgs& args); + static MOZ_ALWAYS_INLINE bool getYear_impl(JSContext* cx, const CallArgs& args); + static MOZ_ALWAYS_INLINE bool getFullYear_impl(JSContext* cx, const CallArgs& args); + static MOZ_ALWAYS_INLINE bool getUTCFullYear_impl(JSContext* cx, const CallArgs& args); + static MOZ_ALWAYS_INLINE bool getMonth_impl(JSContext* cx, const CallArgs& args); + static MOZ_ALWAYS_INLINE bool getUTCMonth_impl(JSContext* cx, const CallArgs& args); + static MOZ_ALWAYS_INLINE bool getDate_impl(JSContext* cx, const CallArgs& args); + static MOZ_ALWAYS_INLINE bool getUTCDate_impl(JSContext* cx, const CallArgs& args); + static MOZ_ALWAYS_INLINE bool getDay_impl(JSContext* cx, const CallArgs& args); + static MOZ_ALWAYS_INLINE bool getUTCDay_impl(JSContext* cx, const CallArgs& args); + static MOZ_ALWAYS_INLINE bool getHours_impl(JSContext* cx, const CallArgs& args); + static MOZ_ALWAYS_INLINE bool getUTCHours_impl(JSContext* cx, const CallArgs& args); + static MOZ_ALWAYS_INLINE bool getMinutes_impl(JSContext* cx, const CallArgs& args); + static MOZ_ALWAYS_INLINE bool getUTCMinutes_impl(JSContext* cx, const CallArgs& args); + static MOZ_ALWAYS_INLINE bool getUTCSeconds_impl(JSContext* cx, const CallArgs& args); + static MOZ_ALWAYS_INLINE bool getUTCMilliseconds_impl(JSContext* cx, const CallArgs& args); + static MOZ_ALWAYS_INLINE bool getTimezoneOffset_impl(JSContext* cx, const CallArgs& args); +}; + +} // namespace js + +#endif // vm_DateObject_h_ |