macros.py revision 7f4d5bd8c03935e2c0cd412e561b8fc5a6a880ae
1# Copyright 2006-2009 the V8 project authors. All rights reserved. 2# Redistribution and use in source and binary forms, with or without 3# modification, are permitted provided that the following conditions are 4# met: 5# 6# * Redistributions of source code must retain the above copyright 7# notice, this list of conditions and the following disclaimer. 8# * Redistributions in binary form must reproduce the above 9# copyright notice, this list of conditions and the following 10# disclaimer in the documentation and/or other materials provided 11# with the distribution. 12# * Neither the name of Google Inc. nor the names of its 13# contributors may be used to endorse or promote products derived 14# from this software without specific prior written permission. 15# 16# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 28# Dictionary that is passed as defines for js2c.py. 29# Used for defines that must be defined for all native js files. 30 31const NONE = 0; 32const READ_ONLY = 1; 33const DONT_ENUM = 2; 34const DONT_DELETE = 4; 35 36# Constants used for getter and setter operations. 37const GETTER = 0; 38const SETTER = 1; 39 40# These definitions must match the index of the properties in objects.h. 41const kApiTagOffset = 0; 42const kApiPropertyListOffset = 1; 43const kApiSerialNumberOffset = 2; 44const kApiConstructorOffset = 2; 45const kApiPrototypeTemplateOffset = 5; 46const kApiParentTemplateOffset = 6; 47 48const NO_HINT = 0; 49const NUMBER_HINT = 1; 50const STRING_HINT = 2; 51 52const kFunctionTag = 0; 53const kNewObjectTag = 1; 54 55# For date.js. 56const HoursPerDay = 24; 57const MinutesPerHour = 60; 58const SecondsPerMinute = 60; 59const msPerSecond = 1000; 60const msPerMinute = 60000; 61const msPerHour = 3600000; 62const msPerDay = 86400000; 63const msPerMonth = 2592000000; 64 65# For apinatives.js 66const kUninitialized = -1; 67 68# Note: kDayZeroInJulianDay = ToJulianDay(1970, 0, 1). 69const kInvalidDate = 'Invalid Date'; 70const kDayZeroInJulianDay = 2440588; 71const kMonthMask = 0x1e0; 72const kDayMask = 0x01f; 73const kYearShift = 9; 74const kMonthShift = 5; 75 76# Limits for parts of the date, so that we support all the dates that 77# ECMA 262 - 15.9.1.1 requires us to, but at the same time be sure that 78# the date (days since 1970) is in SMI range. 79const kMinYear = -1000000; 80const kMaxYear = 1000000; 81const kMinMonth = -10000000; 82const kMaxMonth = 10000000; 83const kMinDate = -100000000; 84const kMaxDate = 100000000; 85 86# Native cache ids. 87const STRING_TO_REGEXP_CACHE_ID = 0; 88 89# Type query macros. 90# 91# Note: We have special support for typeof(foo) === 'bar' in the compiler. 92# It will *not* generate a runtime typeof call for the most important 93# values of 'bar'. 94macro IS_NULL(arg) = (arg === null); 95macro IS_NULL_OR_UNDEFINED(arg) = (arg == null); 96macro IS_UNDEFINED(arg) = (typeof(arg) === 'undefined'); 97macro IS_NUMBER(arg) = (typeof(arg) === 'number'); 98macro IS_STRING(arg) = (typeof(arg) === 'string'); 99macro IS_BOOLEAN(arg) = (typeof(arg) === 'boolean'); 100macro IS_OBJECT(arg) = (%_IsObject(arg)); 101macro IS_ARRAY(arg) = (%_IsArray(arg)); 102macro IS_FUNCTION(arg) = (%_IsFunction(arg)); 103macro IS_REGEXP(arg) = (%_IsRegExp(arg)); 104macro IS_DATE(arg) = (%_ClassOf(arg) === 'Date'); 105macro IS_NUMBER_WRAPPER(arg) = (%_ClassOf(arg) === 'Number'); 106macro IS_STRING_WRAPPER(arg) = (%_ClassOf(arg) === 'String'); 107macro IS_BOOLEAN_WRAPPER(arg) = (%_ClassOf(arg) === 'Boolean'); 108macro IS_ERROR(arg) = (%_ClassOf(arg) === 'Error'); 109macro IS_SCRIPT(arg) = (%_ClassOf(arg) === 'Script'); 110macro IS_ARGUMENTS(arg) = (%_ClassOf(arg) === 'Arguments'); 111macro IS_GLOBAL(arg) = (%_ClassOf(arg) === 'global'); 112macro IS_UNDETECTABLE(arg) = (%_IsUndetectableObject(arg)); 113macro FLOOR(arg) = $floor(arg); 114 115# Macro for ECMAScript 5 queries of the type: 116# "Type(O) is object." 117# This is the same as being either a function or an object in V8 terminology. 118macro IS_SPEC_OBJECT_OR_NULL(arg) = (%_IsObject(arg) || %_IsFunction(arg)); 119 120# Inline macros. Use %IS_VAR to make sure arg is evaluated only once. 121macro NUMBER_IS_NAN(arg) = (!%_IsSmi(%IS_VAR(arg)) && !(arg == arg)); 122macro TO_INTEGER(arg) = (%_IsSmi(%IS_VAR(arg)) ? arg : ToInteger(arg)); 123macro TO_INT32(arg) = (%_IsSmi(%IS_VAR(arg)) ? arg : (arg >> 0)); 124macro TO_UINT32(arg) = (arg >>> 0); 125macro TO_STRING_INLINE(arg) = (IS_STRING(%IS_VAR(arg)) ? arg : NonStringToString(arg)); 126 127 128# Macros implemented in Python. 129python macro CHAR_CODE(str) = ord(str[1]); 130 131# Constants used on an array to implement the properties of the RegExp object. 132const REGEXP_NUMBER_OF_CAPTURES = 0; 133const REGEXP_FIRST_CAPTURE = 3; 134 135# We can't put macros in macros so we use constants here. 136# REGEXP_NUMBER_OF_CAPTURES 137macro NUMBER_OF_CAPTURES(array) = ((array)[0]); 138 139# Limit according to ECMA 262 15.9.1.1 140const MAX_TIME_MS = 8640000000000000; 141 142# Gets the value of a Date object. If arg is not a Date object 143# a type error is thrown. 144macro DATE_VALUE(arg) = (%_ClassOf(arg) === 'Date' ? %_ValueOf(arg) : ThrowDateTypeError()); 145macro DAY(time) = ($floor(time / 86400000)); 146macro MONTH_FROM_TIME(time) = (MonthFromTime(time)); 147macro DATE_FROM_TIME(time) = (DateFromTime(time)); 148macro YEAR_FROM_TIME(time) = (YearFromTime(time)); 149macro HOUR_FROM_TIME(time) = (Modulo($floor(time / 3600000), 24)); 150macro MIN_FROM_TIME(time) = (Modulo($floor(time / 60000), 60)); 151macro SEC_FROM_TIME(time) = (Modulo($floor(time / 1000), 60)); 152macro MS_FROM_TIME(time) = (Modulo(time, 1000)); 153 154# Last input and last subject of regexp matches. 155macro LAST_SUBJECT(array) = ((array)[1]); 156macro LAST_INPUT(array) = ((array)[2]); 157 158# REGEXP_FIRST_CAPTURE 159macro CAPTURE(index) = (3 + (index)); 160const CAPTURE0 = 3; 161const CAPTURE1 = 4; 162 163# PropertyDescriptor return value indices - must match 164# PropertyDescriptorIndices in runtime.cc. 165const IS_ACCESSOR_INDEX = 0; 166const VALUE_INDEX = 1; 167const GETTER_INDEX = 2; 168const SETTER_INDEX = 3; 169const WRITABLE_INDEX = 4; 170const ENUMERABLE_INDEX = 5; 171const CONFIGURABLE_INDEX = 6; 172