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      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 
     31 const NONE        = 0;
     32 const READ_ONLY   = 1;
     33 const DONT_ENUM   = 2;
     34 const DONT_DELETE = 4;
     35 const NEW_ONE_BYTE_STRING = true;
     36 const NEW_TWO_BYTE_STRING = false;
     37 
     38 # Constants used for getter and setter operations.
     39 const GETTER = 0;
     40 const SETTER = 1;
     41 
     42 # These definitions must match the index of the properties in objects.h.
     43 const kApiTagOffset                 = 0;
     44 const kApiPropertyListOffset        = 1;
     45 const kApiSerialNumberOffset        = 3;
     46 const kApiConstructorOffset         = 3;
     47 const kApiPrototypeTemplateOffset   = 5;
     48 const kApiParentTemplateOffset      = 6;
     49 const kApiFlagOffset                = 14;
     50 
     51 const NO_HINT     = 0;
     52 const NUMBER_HINT = 1;
     53 const STRING_HINT = 2;
     54 
     55 const kFunctionTag  = 0;
     56 const kNewObjectTag = 1;
     57 
     58 # For date.js.
     59 const HoursPerDay      = 24;
     60 const MinutesPerHour   = 60;
     61 const SecondsPerMinute = 60;
     62 const msPerSecond      = 1000;
     63 const msPerMinute      = 60000;
     64 const msPerHour        = 3600000;
     65 const msPerDay         = 86400000;
     66 const msPerMonth       = 2592000000;
     67 
     68 # For apinatives.js
     69 const kUninitialized = -1;
     70 const kReadOnlyPrototypeBit = 3;
     71 const kRemovePrototypeBit = 4;  # For FunctionTemplateInfo, matches objects.h
     72 const kDoNotCacheBit = 5;  # For FunctionTemplateInfo, matches objects.h
     73 
     74 # Note: kDayZeroInJulianDay = ToJulianDay(1970, 0, 1).
     75 const kInvalidDate        = 'Invalid Date';
     76 const kDayZeroInJulianDay = 2440588;
     77 const kMonthMask          = 0x1e0;
     78 const kDayMask            = 0x01f;
     79 const kYearShift          = 9;
     80 const kMonthShift         = 5;
     81 
     82 # Limits for parts of the date, so that we support all the dates that
     83 # ECMA 262 - 15.9.1.1 requires us to, but at the same time be sure that
     84 # the date (days since 1970) is in SMI range.
     85 const kMinYear  = -1000000;
     86 const kMaxYear  = 1000000;
     87 const kMinMonth = -10000000;
     88 const kMaxMonth = 10000000;
     89 
     90 # Strict mode flags for passing to %SetProperty
     91 const kSloppyMode = 0;
     92 const kStrictMode = 1;
     93 
     94 # Native cache ids.
     95 const STRING_TO_REGEXP_CACHE_ID = 0;
     96 
     97 # Type query macros.
     98 #
     99 # Note: We have special support for typeof(foo) === 'bar' in the compiler.
    100 #       It will *not* generate a runtime typeof call for the most important
    101 #       values of 'bar'.
    102 macro IS_NULL(arg)              = (arg === null);
    103 macro IS_NULL_OR_UNDEFINED(arg) = (arg == null);
    104 macro IS_UNDEFINED(arg)         = (arg === (void 0));
    105 macro IS_NUMBER(arg)            = (typeof(arg) === 'number');
    106 macro IS_STRING(arg)            = (typeof(arg) === 'string');
    107 macro IS_BOOLEAN(arg)           = (typeof(arg) === 'boolean');
    108 macro IS_SYMBOL(arg)            = (typeof(arg) === 'symbol');
    109 macro IS_OBJECT(arg)            = (%_IsObject(arg));
    110 macro IS_ARRAY(arg)             = (%_IsArray(arg));
    111 macro IS_FUNCTION(arg)          = (%_IsFunction(arg));
    112 macro IS_REGEXP(arg)            = (%_IsRegExp(arg));
    113 macro IS_SET(arg)               = (%_ClassOf(arg) === 'Set');
    114 macro IS_MAP(arg)               = (%_ClassOf(arg) === 'Map');
    115 macro IS_WEAKMAP(arg)           = (%_ClassOf(arg) === 'WeakMap');
    116 macro IS_WEAKSET(arg)           = (%_ClassOf(arg) === 'WeakSet');
    117 macro IS_DATE(arg)              = (%_ClassOf(arg) === 'Date');
    118 macro IS_NUMBER_WRAPPER(arg)    = (%_ClassOf(arg) === 'Number');
    119 macro IS_STRING_WRAPPER(arg)    = (%_ClassOf(arg) === 'String');
    120 macro IS_SYMBOL_WRAPPER(arg)    = (%_ClassOf(arg) === 'Symbol');
    121 macro IS_BOOLEAN_WRAPPER(arg)   = (%_ClassOf(arg) === 'Boolean');
    122 macro IS_ERROR(arg)             = (%_ClassOf(arg) === 'Error');
    123 macro IS_SCRIPT(arg)            = (%_ClassOf(arg) === 'Script');
    124 macro IS_ARGUMENTS(arg)         = (%_ClassOf(arg) === 'Arguments');
    125 macro IS_GLOBAL(arg)            = (%_ClassOf(arg) === 'global');
    126 macro IS_ARRAYBUFFER(arg)       = (%_ClassOf(arg) === 'ArrayBuffer');
    127 macro IS_DATAVIEW(arg)          = (%_ClassOf(arg) === 'DataView');
    128 macro IS_GENERATOR(arg)         = (%_ClassOf(arg) === 'Generator');
    129 macro IS_SET_ITERATOR(arg)      = (%_ClassOf(arg) === 'Set Iterator');
    130 macro IS_MAP_ITERATOR(arg)      = (%_ClassOf(arg) === 'Map Iterator');
    131 macro IS_UNDETECTABLE(arg)      = (%_IsUndetectableObject(arg));
    132 macro FLOOR(arg)                = $floor(arg);
    133 
    134 # Macro for ECMAScript 5 queries of the type:
    135 # "Type(O) is object."
    136 # This is the same as being either a function or an object in V8 terminology
    137 # (including proxies).
    138 # In addition, an undetectable object is also included by this.
    139 macro IS_SPEC_OBJECT(arg)   = (%_IsSpecObject(arg));
    140 
    141 # Macro for ECMAScript 5 queries of the type:
    142 # "IsCallable(O)"
    143 # We assume here that this is the same as being either a function or a function
    144 # proxy. That ignores host objects with [[Call]] methods, but in most situations
    145 # we cannot handle those anyway.
    146 macro IS_SPEC_FUNCTION(arg) = (%_ClassOf(arg) === 'Function');
    147 
    148 # Macro for ES6 CheckObjectCoercible
    149 # Will throw a TypeError of the form "[functionName] called on null or undefined".
    150 macro CHECK_OBJECT_COERCIBLE(arg, functionName) = if (IS_NULL_OR_UNDEFINED(arg) && !IS_UNDETECTABLE(arg)) throw MakeTypeError('called_on_null_or_undefined', [functionName]);
    151 
    152 # Indices in bound function info retrieved by %BoundFunctionGetBindings(...).
    153 const kBoundFunctionIndex = 0;
    154 const kBoundThisIndex = 1;
    155 const kBoundArgumentsStartIndex = 2;
    156 
    157 # Inline macros. Use %IS_VAR to make sure arg is evaluated only once.
    158 macro NUMBER_IS_NAN(arg) = (!%_IsSmi(%IS_VAR(arg)) && !(arg == arg));
    159 macro NUMBER_IS_FINITE(arg) = (%_IsSmi(%IS_VAR(arg)) || ((arg == arg) && (arg != 1/0) && (arg != -1/0)));
    160 macro TO_INTEGER(arg) = (%_IsSmi(%IS_VAR(arg)) ? arg : %NumberToInteger(ToNumber(arg)));
    161 macro TO_INTEGER_FOR_SIDE_EFFECT(arg) = (%_IsSmi(%IS_VAR(arg)) ? arg : ToNumber(arg));
    162 macro TO_INTEGER_MAP_MINUS_ZERO(arg) = (%_IsSmi(%IS_VAR(arg)) ? arg : %NumberToIntegerMapMinusZero(ToNumber(arg)));
    163 macro TO_INT32(arg) = (%_IsSmi(%IS_VAR(arg)) ? arg : (arg >> 0));
    164 macro TO_UINT32(arg) = (arg >>> 0);
    165 macro TO_STRING_INLINE(arg) = (IS_STRING(%IS_VAR(arg)) ? arg : NonStringToString(arg));
    166 macro TO_NUMBER_INLINE(arg) = (IS_NUMBER(%IS_VAR(arg)) ? arg : NonNumberToNumber(arg));
    167 macro TO_OBJECT_INLINE(arg) = (IS_SPEC_OBJECT(%IS_VAR(arg)) ? arg : ToObject(arg));
    168 macro JSON_NUMBER_TO_STRING(arg) = ((%_IsSmi(%IS_VAR(arg)) || arg - arg == 0) ? %_NumberToString(arg) : "null");
    169 macro HAS_OWN_PROPERTY(obj, index) = (%_CallFunction(obj, index, ObjectHasOwnProperty));
    170 
    171 # Private names.
    172 # GET_PRIVATE should only be used if the property is known to exists on obj
    173 # itself (it should really use %GetOwnProperty, but that would be way slower).
    174 macro GLOBAL_PRIVATE(name) = (%CreateGlobalPrivateOwnSymbol(name));
    175 macro NEW_PRIVATE_OWN(name) = (%CreatePrivateOwnSymbol(name));
    176 macro IS_PRIVATE(sym) = (%SymbolIsPrivate(sym));
    177 macro HAS_PRIVATE(obj, sym) = (%HasOwnProperty(obj, sym));
    178 macro HAS_DEFINED_PRIVATE(obj, sym) = (!IS_UNDEFINED(obj[sym]));
    179 macro GET_PRIVATE(obj, sym) = (obj[sym]);
    180 macro SET_PRIVATE(obj, sym, val) = (obj[sym] = val);
    181 macro DELETE_PRIVATE(obj, sym) = (delete obj[sym]);
    182 
    183 # Constants.  The compiler constant folds them.
    184 const NAN = $NaN;
    185 const INFINITY = (1/0);
    186 const UNDEFINED = (void 0);
    187 
    188 # Macros implemented in Python.
    189 python macro CHAR_CODE(str) = ord(str[1]);
    190 
    191 # Constants used on an array to implement the properties of the RegExp object.
    192 const REGEXP_NUMBER_OF_CAPTURES = 0;
    193 const REGEXP_FIRST_CAPTURE = 3;
    194 
    195 # We can't put macros in macros so we use constants here.
    196 # REGEXP_NUMBER_OF_CAPTURES
    197 macro NUMBER_OF_CAPTURES(array) = ((array)[0]);
    198 
    199 # Limit according to ECMA 262 15.9.1.1
    200 const MAX_TIME_MS = 8640000000000000;
    201 # Limit which is MAX_TIME_MS + msPerMonth.
    202 const MAX_TIME_BEFORE_UTC = 8640002592000000;
    203 
    204 # Gets the value of a Date object. If arg is not a Date object
    205 # a type error is thrown.
    206 macro CHECK_DATE(arg) = if (%_ClassOf(arg) !== 'Date') ThrowDateTypeError();
    207 macro LOCAL_DATE_VALUE(arg) = (%_DateField(arg, 0) + %_DateField(arg, 21));
    208 macro UTC_DATE_VALUE(arg)    = (%_DateField(arg, 0));
    209 
    210 macro LOCAL_YEAR(arg)        = (%_DateField(arg, 1));
    211 macro LOCAL_MONTH(arg)       = (%_DateField(arg, 2));
    212 macro LOCAL_DAY(arg)         = (%_DateField(arg, 3));
    213 macro LOCAL_WEEKDAY(arg)     = (%_DateField(arg, 4));
    214 macro LOCAL_HOUR(arg)        = (%_DateField(arg, 5));
    215 macro LOCAL_MIN(arg)         = (%_DateField(arg, 6));
    216 macro LOCAL_SEC(arg)         = (%_DateField(arg, 7));
    217 macro LOCAL_MS(arg)          = (%_DateField(arg, 8));
    218 macro LOCAL_DAYS(arg)        = (%_DateField(arg, 9));
    219 macro LOCAL_TIME_IN_DAY(arg) = (%_DateField(arg, 10));
    220 
    221 macro UTC_YEAR(arg)        = (%_DateField(arg, 11));
    222 macro UTC_MONTH(arg)       = (%_DateField(arg, 12));
    223 macro UTC_DAY(arg)         = (%_DateField(arg, 13));
    224 macro UTC_WEEKDAY(arg)     = (%_DateField(arg, 14));
    225 macro UTC_HOUR(arg)        = (%_DateField(arg, 15));
    226 macro UTC_MIN(arg)         = (%_DateField(arg, 16));
    227 macro UTC_SEC(arg)         = (%_DateField(arg, 17));
    228 macro UTC_MS(arg)          = (%_DateField(arg, 18));
    229 macro UTC_DAYS(arg)        = (%_DateField(arg, 19));
    230 macro UTC_TIME_IN_DAY(arg) = (%_DateField(arg, 20));
    231 
    232 macro TIMEZONE_OFFSET(arg)   = (%_DateField(arg, 21));
    233 
    234 macro SET_UTC_DATE_VALUE(arg, value) = (%DateSetValue(arg, value, 1));
    235 macro SET_LOCAL_DATE_VALUE(arg, value) = (%DateSetValue(arg, value, 0));
    236 
    237 # Last input and last subject of regexp matches.
    238 const LAST_SUBJECT_INDEX = 1;
    239 macro LAST_SUBJECT(array) = ((array)[1]);
    240 macro LAST_INPUT(array) = ((array)[2]);
    241 
    242 # REGEXP_FIRST_CAPTURE
    243 macro CAPTURE(index) = (3 + (index));
    244 const CAPTURE0 = 3;
    245 const CAPTURE1 = 4;
    246 
    247 # For the regexp capture override array.  This has the same
    248 # format as the arguments to a function called from
    249 # String.prototype.replace.
    250 macro OVERRIDE_MATCH(override) = ((override)[0]);
    251 macro OVERRIDE_POS(override) = ((override)[(override).length - 2]);
    252 macro OVERRIDE_SUBJECT(override) = ((override)[(override).length - 1]);
    253 # 1-based so index of 1 returns the first capture
    254 macro OVERRIDE_CAPTURE(override, index) = ((override)[(index)]);
    255 
    256 # PropertyDescriptor return value indices - must match
    257 # PropertyDescriptorIndices in runtime.cc.
    258 const IS_ACCESSOR_INDEX = 0;
    259 const VALUE_INDEX = 1;
    260 const GETTER_INDEX = 2;
    261 const SETTER_INDEX = 3;
    262 const WRITABLE_INDEX = 4;
    263 const ENUMERABLE_INDEX = 5;
    264 const CONFIGURABLE_INDEX = 6;
    265 
    266 # For messages.js
    267 # Matches Script::Type from objects.h
    268 const TYPE_NATIVE = 0;
    269 const TYPE_EXTENSION = 1;
    270 const TYPE_NORMAL = 2;
    271 
    272 # Matches Script::CompilationType from objects.h
    273 const COMPILATION_TYPE_HOST = 0;
    274 const COMPILATION_TYPE_EVAL = 1;
    275 const COMPILATION_TYPE_JSON = 2;
    276 
    277 # Matches Messages::kNoLineNumberInfo from v8.h
    278 const kNoLineNumberInfo = 0;
    279 
    280 # Matches PropertyAttributes from property-details.h
    281 const PROPERTY_ATTRIBUTES_NONE = 0;
    282 const PROPERTY_ATTRIBUTES_STRING = 8;
    283 const PROPERTY_ATTRIBUTES_SYMBOLIC = 16;
    284 const PROPERTY_ATTRIBUTES_PRIVATE_SYMBOL = 32;
    285 
    286 # Use for keys, values and entries iterators.
    287 const ITERATOR_KIND_KEYS = 1;
    288 const ITERATOR_KIND_VALUES = 2;
    289 const ITERATOR_KIND_ENTRIES = 3;
    290 
    291 # Check whether debug is active.
    292 const DEBUG_IS_ACTIVE = (%_DebugIsActive() != 0);
    293