CSE2410 Fall 2014 Bounce

# Copyright 2006-2009 the V8 project authors. All rights reserved.

# Redistribution and use in source and binary forms, with or without

# modification, are permitted provided that the following conditions are

# met:

#

#     * Redistributions of source code must retain the above copyright

#       notice, this list of conditions and the following disclaimer.

#     * Redistributions in binary form must reproduce the above

#       copyright notice, this list of conditions and the following

#       disclaimer in the documentation and/or other materials provided

#       with the distribution.

#     * Neither the name of Google Inc. nor the names of its

#       contributors may be used to endorse or promote products derived

#       from this software without specific prior written permission.

#

# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR

# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT

# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

# Dictionary that is passed as defines for js2c.py.

# Used for defines that must be defined for all native JS files.

const NONE        = 0;

const READ_ONLY   = 1;

const DONT_ENUM   = 2;

const DONT_DELETE = 4;

const NEW_ONE_BYTE_STRING = true;

const NEW_TWO_BYTE_STRING = false;

# Constants used for getter and setter operations.

const GETTER = 0;

const SETTER = 1;

# These definitions must match the index of the properties in objects.h.

const kApiTagOffset                 = 0;

const kApiPropertyListOffset        = 1;

const kApiSerialNumberOffset        = 3;

const kApiConstructorOffset         = 3;

const kApiPrototypeTemplateOffset   = 5;

const kApiParentTemplateOffset      = 6;

const kApiFlagOffset                = 14;

const NO_HINT     = 0;

const NUMBER_HINT = 1;

const STRING_HINT = 2;

const kFunctionTag  = 0;

const kNewObjectTag = 1;

# For date.js.

const HoursPerDay      = 24;

const MinutesPerHour   = 60;

const SecondsPerMinute = 60;

const msPerSecond      = 1000;

const msPerMinute      = 60000;

const msPerHour        = 3600000;

const msPerDay         = 86400000;

const msPerMonth       = 2592000000;

# For apinatives.js

const kUninitialized = -1;

const kReadOnlyPrototypeBit = 3;

const kRemovePrototypeBit = 4;  # For FunctionTemplateInfo, matches objects.h

const kDoNotCacheBit = 5;  # For FunctionTemplateInfo, matches objects.h

# Note: kDayZeroInJulianDay = ToJulianDay(1970, 0, 1).

const kInvalidDate        = 'Invalid Date';

const kDayZeroInJulianDay = 2440588;

const kMonthMask          = 0x1e0;

const kDayMask            = 0x01f;

const kYearShift          = 9;

const kMonthShift         = 5;

# Limits for parts of the date, so that we support all the dates that

# ECMA 262 - 15.9.1.1 requires us to, but at the same time be sure that

# the date (days since 1970) is in SMI range.

const kMinYear  = -1000000;

const kMaxYear  = 1000000;

const kMinMonth = -10000000;

const kMaxMonth = 10000000;

# Native cache ids.

const STRING_TO_REGEXP_CACHE_ID = 0;

# Type query macros.

#

# Note: We have special support for typeof(foo) === 'bar' in the compiler.

#       It will *not* generate a runtime typeof call for the most important

#       values of 'bar'.

macro IS_NULL(arg)              = (arg === null);

macro IS_NULL_OR_UNDEFINED(arg) = (arg == null);

macro IS_UNDEFINED(arg)         = (typeof(arg) === 'undefined');

macro IS_NUMBER(arg)            = (typeof(arg) === 'number');

macro IS_STRING(arg)            = (typeof(arg) === 'string');

macro IS_BOOLEAN(arg)           = (typeof(arg) === 'boolean');

macro IS_SYMBOL(arg)            = (typeof(arg) === 'symbol');

macro IS_OBJECT(arg)            = (%_IsObject(arg));

macro IS_ARRAY(arg)             = (%_IsArray(arg));

macro IS_FUNCTION(arg)          = (%_IsFunction(arg));

macro IS_REGEXP(arg)            = (%_IsRegExp(arg));

macro IS_SET(arg)               = (%_ClassOf(arg) === 'Set');

macro IS_MAP(arg)               = (%_ClassOf(arg) === 'Map');

macro IS_WEAKMAP(arg)           = (%_ClassOf(arg) === 'WeakMap');

macro IS_WEAKSET(arg)           = (%_ClassOf(arg) === 'WeakSet');

macro IS_DATE(arg)              = (%_ClassOf(arg) === 'Date');

macro IS_NUMBER_WRAPPER(arg)    = (%_ClassOf(arg) === 'Number');

macro IS_STRING_WRAPPER(arg)    = (%_ClassOf(arg) === 'String');

macro IS_SYMBOL_WRAPPER(arg)    = (%_ClassOf(arg) === 'Symbol');

macro IS_BOOLEAN_WRAPPER(arg)   = (%_ClassOf(arg) === 'Boolean');

macro IS_ERROR(arg)             = (%_ClassOf(arg) === 'Error');

macro IS_SCRIPT(arg)            = (%_ClassOf(arg) === 'Script');

macro IS_ARGUMENTS(arg)         = (%_ClassOf(arg) === 'Arguments');

macro IS_GLOBAL(arg)            = (%_ClassOf(arg) === 'global');

macro IS_ARRAYBUFFER(arg)       = (%_ClassOf(arg) === 'ArrayBuffer');

macro IS_DATAVIEW(arg)          = (%_ClassOf(arg) === 'DataView');

macro IS_GENERATOR(arg)         = (%_ClassOf(arg) === 'Generator');

macro IS_UNDETECTABLE(arg)      = (%_IsUndetectableObject(arg));

macro FLOOR(arg)                = $floor(arg);

# Macro for ECMAScript 5 queries of the type:

# "Type(O) is object."

# This is the same as being either a function or an object in V8 terminology

# (including proxies).

# In addition, an undetectable object is also included by this.

macro IS_SPEC_OBJECT(arg)   = (%_IsSpecObject(arg));

# Macro for ECMAScript 5 queries of the type:

# "IsCallable(O)"

# We assume here that this is the same as being either a function or a function

# proxy. That ignores host objects with [[Call]] methods, but in most situations

# we cannot handle those anyway.

macro IS_SPEC_FUNCTION(arg) = (%_ClassOf(arg) === 'Function');

# Indices in bound function info retrieved by %BoundFunctionGetBindings(...).

const kBoundFunctionIndex = 0;

const kBoundThisIndex = 1;

const kBoundArgumentsStartIndex = 2;

# Inline macros. Use %IS_VAR to make sure arg is evaluated only once.

macro NUMBER_IS_NAN(arg) = (!%_IsSmi(%IS_VAR(arg)) && !(arg == arg));

macro NUMBER_IS_FINITE(arg) = (%_IsSmi(%IS_VAR(arg)) || ((arg == arg) && (arg != 1/0) && (arg != -1/0)));

macro TO_INTEGER(arg) = (%_IsSmi(%IS_VAR(arg)) ? arg : %NumberToInteger(ToNumber(arg)));

macro TO_INTEGER_FOR_SIDE_EFFECT(arg) = (%_IsSmi(%IS_VAR(arg)) ? arg : ToNumber(arg));

macro TO_INTEGER_MAP_MINUS_ZERO(arg) = (%_IsSmi(%IS_VAR(arg)) ? arg : %NumberToIntegerMapMinusZero(ToNumber(arg)));

macro TO_INT32(arg) = (%_IsSmi(%IS_VAR(arg)) ? arg : (arg >> 0));

macro TO_UINT32(arg) = (arg >>> 0);

macro TO_STRING_INLINE(arg) = (IS_STRING(%IS_VAR(arg)) ? arg : NonStringToString(arg));

macro TO_NUMBER_INLINE(arg) = (IS_NUMBER(%IS_VAR(arg)) ? arg : NonNumberToNumber(arg));

macro TO_OBJECT_INLINE(arg) = (IS_SPEC_OBJECT(%IS_VAR(arg)) ? arg : ToObject(arg));

macro JSON_NUMBER_TO_STRING(arg) = ((%_IsSmi(%IS_VAR(arg)) || arg - arg == 0) ? %_NumberToString(arg) : "null");

# Constants.  The compiler constant folds them.

const NAN = $NaN;

const INFINITY = (1/0);

const UNDEFINED = (void 0);

# Macros implemented in Python.

python macro CHAR_CODE(str) = ord(str[1]);

# Constants used on an array to implement the properties of the RegExp object.

const REGEXP_NUMBER_OF_CAPTURES = 0;

const REGEXP_FIRST_CAPTURE = 3;

# We can't put macros in macros so we use constants here.

# REGEXP_NUMBER_OF_CAPTURES

macro NUMBER_OF_CAPTURES(array) = ((array)[0]);

# Limit according to ECMA 262 15.9.1.1

const MAX_TIME_MS = 8640000000000000;

# Limit which is MAX_TIME_MS + msPerMonth.

const MAX_TIME_BEFORE_UTC = 8640002592000000;

# Gets the value of a Date object. If arg is not a Date object

# a type error is thrown.

macro CHECK_DATE(arg) = if (%_ClassOf(arg) !== 'Date') ThrowDateTypeError();

macro LOCAL_DATE_VALUE(arg) = (%_DateField(arg, 0) + %_DateField(arg, 21));

macro UTC_DATE_VALUE(arg)    = (%_DateField(arg, 0));

macro LOCAL_YEAR(arg)        = (%_DateField(arg, 1));

macro LOCAL_MONTH(arg)       = (%_DateField(arg, 2));

macro LOCAL_DAY(arg)         = (%_DateField(arg, 3));

macro LOCAL_WEEKDAY(arg)     = (%_DateField(arg, 4));

macro LOCAL_HOUR(arg)        = (%_DateField(arg, 5));

macro LOCAL_MIN(arg)         = (%_DateField(arg, 6));

macro LOCAL_SEC(arg)         = (%_DateField(arg, 7));

macro LOCAL_MS(arg)          = (%_DateField(arg, 8));

macro LOCAL_DAYS(arg)        = (%_DateField(arg, 9));

macro LOCAL_TIME_IN_DAY(arg) = (%_DateField(arg, 10));

macro UTC_YEAR(arg)        = (%_DateField(arg, 11));

macro UTC_MONTH(arg)       = (%_DateField(arg, 12));

macro UTC_DAY(arg)         = (%_DateField(arg, 13));

macro UTC_WEEKDAY(arg)     = (%_DateField(arg, 14));

macro UTC_HOUR(arg)        = (%_DateField(arg, 15));

macro UTC_MIN(arg)         = (%_DateField(arg, 16));

macro UTC_SEC(arg)         = (%_DateField(arg, 17));

macro UTC_MS(arg)          = (%_DateField(arg, 18));

macro UTC_DAYS(arg)        = (%_DateField(arg, 19));

macro UTC_TIME_IN_DAY(arg) = (%_DateField(arg, 20));

macro TIMEZONE_OFFSET(arg)   = (%_DateField(arg, 21));

macro SET_UTC_DATE_VALUE(arg, value) = (%DateSetValue(arg, value, 1));

macro SET_LOCAL_DATE_VALUE(arg, value) = (%DateSetValue(arg, value, 0));

# Last input and last subject of regexp matches.

const LAST_SUBJECT_INDEX = 1;

macro LAST_SUBJECT(array) = ((array)[1]);

macro LAST_INPUT(array) = ((array)[2]);

# REGEXP_FIRST_CAPTURE

macro CAPTURE(index) = (3 + (index));

const CAPTURE0 = 3;

const CAPTURE1 = 4;

# For the regexp capture override array.  This has the same

# format as the arguments to a function called from

# String.prototype.replace.

macro OVERRIDE_MATCH(override) = ((override)[0]);

macro OVERRIDE_POS(override) = ((override)[(override).length - 2]);

macro OVERRIDE_SUBJECT(override) = ((override)[(override).length - 1]);

# 1-based so index of 1 returns the first capture

macro OVERRIDE_CAPTURE(override, index) = ((override)[(index)]);

# PropertyDescriptor return value indices - must match

# PropertyDescriptorIndices in runtime.cc.

const IS_ACCESSOR_INDEX = 0;

const VALUE_INDEX = 1;

const GETTER_INDEX = 2;

const SETTER_INDEX = 3;

const WRITABLE_INDEX = 4;

const ENUMERABLE_INDEX = 5;

const CONFIGURABLE_INDEX = 6;

# For messages.js

# Matches Script::Type from objects.h

const TYPE_NATIVE = 0;

const TYPE_EXTENSION = 1;

const TYPE_NORMAL = 2;

# Matches Script::CompilationType from objects.h

const COMPILATION_TYPE_HOST = 0;

const COMPILATION_TYPE_EVAL = 1;

const COMPILATION_TYPE_JSON = 2;

# Matches Messages::kNoLineNumberInfo from v8.h

const kNoLineNumberInfo = 0;