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jerryscript/jerry-core/ecma/base/ecma-globals.h
Ruben Ayrapetyan 06dffdec8f Remove exit completion value type. 
JerryScript-DCO-1.0-Signed-off-by: Ruben Ayrapetyan r.ayrapetyan@samsung.com
2015-06-29 10:24:18 +03:00

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/* Copyright 2014-2015 Samsung Electronics Co., Ltd.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/** \addtogroup ecma ECMA
* @{
*
* \addtogroup ecmatypes ECMA types
* @{
*/
#ifndef JERRY_ECMA_GLOBALS_H
#define JERRY_ECMA_GLOBALS_H
#include "config.h"
#include "jrt.h"
#include "mem-allocator.h"
#include "rcs-recordset.h"
/** \addtogroup compressedpointer Compressed pointer
* @{
*/
/**
* Ecma-pointer field is used to calculate ecma-value's address.
*
* Ecma-pointer contains value's shifted offset from common Ecma-pointers' base.
* The offset is shifted right by MEM_ALIGNMENT_LOG.
* Least significant MEM_ALIGNMENT_LOG bits of non-shifted offset are zeroes.
*/
#define ECMA_POINTER_FIELD_WIDTH MEM_CP_WIDTH
/**
* The NULL value for compressed pointers
*/
#define ECMA_NULL_POINTER MEM_CP_NULL
/**
* @}
*/
/**
* Type of ecma-value
*/
typedef enum
{
ECMA_TYPE_SIMPLE, /**< simple value */
ECMA_TYPE_NUMBER, /**< 64-bit integer */
ECMA_TYPE_STRING, /**< pointer to description of a string */
ECMA_TYPE_OBJECT /**< pointer to description of an object */
} ecma_type_t;
/**
* Simple ecma-values
*/
typedef enum
{
/**
* Empty value is implementation defined value, used for:
* - representing empty value in completion values (see also: ECMA-262 v5, 8.9 Completion specification type);
* - values of uninitialized immutable bindings;
* - values of empty register variables.
*/
ECMA_SIMPLE_VALUE_EMPTY,
ECMA_SIMPLE_VALUE_UNDEFINED, /**< undefined value */
ECMA_SIMPLE_VALUE_NULL, /**< null value */
ECMA_SIMPLE_VALUE_FALSE, /**< boolean false */
ECMA_SIMPLE_VALUE_TRUE, /**< boolean true */
ECMA_SIMPLE_VALUE_ARRAY_REDIRECT, /**< implementation defined value for an array's elements that exist,
but are stored directly in the array's property list
(used for array elements with non-default attribute values) */
ECMA_SIMPLE_VALUE__COUNT /** count of simple ecma-values */
} ecma_simple_value_t;
/**
* Type of ecma-property
*/
typedef enum
{
ECMA_PROPERTY_NAMEDDATA, /**< named data property */
ECMA_PROPERTY_NAMEDACCESSOR, /**< named accessor property */
ECMA_PROPERTY_INTERNAL /**< internal property */
} ecma_property_type_t;
/**
* Type of block evaluation (completion) result.
*
* See also: ECMA-262 v5, 8.9.
*/
typedef enum
{
ECMA_COMPLETION_TYPE_NORMAL, /**< default completion */
ECMA_COMPLETION_TYPE_RETURN, /**< completion with return */
ECMA_COMPLETION_TYPE_JUMP, /**< implementation-defined completion type
* for jump statements (break, continue)
* that require completion of one or several
* statements, before performing related jump.
*
* For example, 'break' in the following code
* requires to return from opfunc_with handler
* before performing jump to the loop end:
*
* for (var i = 0; i < 10; i++)
* {
* with (obj)
* {
* break;
* }
* }
*/
ECMA_COMPLETION_TYPE_THROW, /**< completion with throw */
ECMA_COMPLETION_TYPE_META /**< implementation-defined completion type
for meta opcode */
} ecma_completion_type_t;
/**
* Description of an ecma-value
*
* Bit-field structure: type (2) | value (ECMA_POINTER_FIELD_WIDTH)
*/
typedef uint32_t ecma_value_t;
/**
* Value type (ecma_type_t)
*/
#define ECMA_VALUE_TYPE_POS (0)
#define ECMA_VALUE_TYPE_WIDTH (2)
/**
* Simple value (ecma_simple_value_t) or compressed pointer to value (depending on value_type)
*/
#define ECMA_VALUE_VALUE_POS (ECMA_VALUE_TYPE_POS + \
ECMA_VALUE_TYPE_WIDTH)
#define ECMA_VALUE_VALUE_WIDTH (ECMA_POINTER_FIELD_WIDTH)
/**
* Size of ecma value description, in bits
*/
#define ECMA_VALUE_SIZE (ECMA_VALUE_VALUE_POS + ECMA_VALUE_VALUE_WIDTH)
/**
* Description of a block completion value
*
* See also: ECMA-262 v5, 8.9.
*
* value (16)
* Bit-field structure: type (8) | padding (8) <
* break / continue target
*/
typedef uint32_t ecma_completion_value_t;
/**
* Value
*
* Used for normal, return, throw and exit completion types.
*/
#define ECMA_COMPLETION_VALUE_VALUE_POS (0)
#define ECMA_COMPLETION_VALUE_VALUE_WIDTH (ECMA_VALUE_SIZE)
/**
* Break / continue jump target
*/
#define ECMA_COMPLETION_VALUE_TARGET_POS (0)
#define ECMA_COMPLETION_VALUE_TARGET_WIDTH ((uint32_t) sizeof (opcode_counter_t) * JERRY_BITSINBYTE)
/**
* Type (ecma_completion_type_t)
*/
#define ECMA_COMPLETION_VALUE_TYPE_POS (JERRY_MAX (JERRY_ALIGNUP (ECMA_COMPLETION_VALUE_VALUE_POS + \
ECMA_COMPLETION_VALUE_VALUE_WIDTH, \
JERRY_BITSINBYTE), \
JERRY_ALIGNUP (ECMA_COMPLETION_VALUE_TARGET_POS + \
ECMA_COMPLETION_VALUE_TARGET_WIDTH, \
JERRY_BITSINBYTE)))
#define ECMA_COMPLETION_VALUE_TYPE_WIDTH (8)
/**
* Size of ecma completion value description, in bits
*/
#define ECMA_COMPLETION_VALUE_SIZE (ECMA_COMPLETION_VALUE_TYPE_POS + \
ECMA_COMPLETION_VALUE_TYPE_WIDTH)
/**
* Label
*
* Used for break and continue completion types.
*/
typedef struct
{
/** Target's offset */
uint32_t offset;
/** Levels to label left */
uint32_t depth;
} ecma_label_descriptor_t;
/**
* Internal properties' identifiers.
*/
typedef enum
{
ECMA_INTERNAL_PROPERTY_CLASS, /**< [[Class]] */
ECMA_INTERNAL_PROPERTY_PROTOTYPE, /**< [[Prototype]] */
ECMA_INTERNAL_PROPERTY_EXTENSIBLE, /**< [[Extensible]] */
ECMA_INTERNAL_PROPERTY_SCOPE, /**< [[Scope]] */
ECMA_INTERNAL_PROPERTY_PARAMETERS_MAP, /**< [[ParametersMap]] */
ECMA_INTERNAL_PROPERTY_CODE_BYTECODE, /**< first part of [[Code]] - compressed pointer to bytecode array */
ECMA_INTERNAL_PROPERTY_CODE_FLAGS_AND_OFFSET, /**< second part of [[Code]] - offset in bytecode array and code flags
* (see also: ecma_pack_code_internal_property_value) */
ECMA_INTERNAL_PROPERTY_NATIVE_CODE, /**< native handler location descriptor */
ECMA_INTERNAL_PROPERTY_NATIVE_HANDLE, /**< native handle associated with an object */
ECMA_INTERNAL_PROPERTY_FREE_CALLBACK, /**< object's native free callback */
ECMA_INTERNAL_PROPERTY_FORMAL_PARAMETERS, /**< [[FormalParameters]] */
ECMA_INTERNAL_PROPERTY_PRIMITIVE_STRING_VALUE, /**< [[Primitive value]] for String objects */
ECMA_INTERNAL_PROPERTY_PRIMITIVE_NUMBER_VALUE, /**< [[Primitive value]] for Number objects */
ECMA_INTERNAL_PROPERTY_PRIMITIVE_BOOLEAN_VALUE, /**< [[Primitive value]] for Boolean objects */
/** Part of an array, that is indexed by numbers */
ECMA_INTERNAL_PROPERTY_NUMBER_INDEXED_ARRAY_VALUES,
/** Part of an array, that is indexed by strings */
ECMA_INTERNAL_PROPERTY_STRING_INDEXED_ARRAY_VALUES,
/** Implementation-defined identifier of built-in object */
ECMA_INTERNAL_PROPERTY_BUILT_IN_ID,
/** Implementation-defined identifier of built-in routine
that corresponds to a built-in function object
([[Built-in routine ID]]) */
ECMA_INTERNAL_PROPERTY_BUILT_IN_ROUTINE_ID,
/** Identifier of implementation-defined extension object */
ECMA_INTERNAL_PROPERTY_EXTENSION_ID,
/**
* Bit-mask of non-instantiated built-in's properties (bits 0-31)
*/
ECMA_INTERNAL_PROPERTY_NON_INSTANTIATED_BUILT_IN_MASK_0_31,
/**
* Bit-mask of non-instantiated built-in's properties (bits 32-63)
*/
ECMA_INTERNAL_PROPERTY_NON_INSTANTIATED_BUILT_IN_MASK_32_63,
/**
* RegExp bytecode array
*/
ECMA_INTERNAL_PROPERTY_REGEXP_BYTECODE,
/**
* Number of internal properties' types
*/
ECMA_INTERNAL_PROPERTY__COUNT
} ecma_internal_property_id_t;
/**
* Property's 'Writable' attribute's values description.
*/
typedef enum
{
ECMA_PROPERTY_NOT_WRITABLE, /**< property's 'Writable' attribute is false */
ECMA_PROPERTY_WRITABLE /**< property's 'Writable' attribute is true */
} ecma_property_writable_value_t;
/**
* Property's 'Enumerable' attribute's values description.
*/
typedef enum
{
ECMA_PROPERTY_NOT_ENUMERABLE, /**< property's 'Enumerable' attribute is false */
ECMA_PROPERTY_ENUMERABLE /**< property's 'Enumerable' attribute is true */
} ecma_property_enumerable_value_t;
/**
* Property's 'Configurable' attribute's values description.
*/
typedef enum
{
ECMA_PROPERTY_NOT_CONFIGURABLE, /**< property's 'Configurable' attribute is false */
ECMA_PROPERTY_CONFIGURABLE /**< property's 'Configurable' attribute is true */
} ecma_property_configurable_value_t;
/**
* Width of internal property type field's width
*/
#define ECMA_PROPERTY_INTERNAL_PROPERTY_TYPE_WIDTH (5)
/**
* Pair of pointers - to property's getter and setter
*/
typedef struct
{
mem_cpointer_t getter_p : ECMA_POINTER_FIELD_WIDTH; /**< pointer to getter object */
mem_cpointer_t setter_p : ECMA_POINTER_FIELD_WIDTH; /**< pointer to setter object */
} ecma_getter_setter_pointers_t;
/**
* Description of ecma-property
*/
typedef struct __attr_packed___ ecma_property_t
{
/** Property's type (ecma_property_type_t) */
unsigned int type : 2;
/** Compressed pointer to next property */
mem_cpointer_t next_property_p : ECMA_POINTER_FIELD_WIDTH;
/** Property's details (depending on Type) */
union
{
/** Description of named data property */
struct __attr_packed___ ecma_named_data_property_t
{
/** Value */
ecma_value_t value : ECMA_VALUE_SIZE;
/** Compressed pointer to property's name (pointer to String) */
mem_cpointer_t name_p : ECMA_POINTER_FIELD_WIDTH;
/** Flag indicating whether the property is registered in LCache */
unsigned int is_lcached : 1;
/** Attribute 'Writable' (ecma_property_writable_value_t) */
unsigned int writable : 1;
/** Attribute 'Enumerable' (ecma_property_enumerable_value_t) */
unsigned int enumerable : 1;
/** Attribute 'Configurable' (ecma_property_configurable_value_t) */
unsigned int configurable : 1;
} named_data_property;
/** Description of named accessor property */
struct __attr_packed___ ecma_named_accessor_property_t
{
/** Compressed pointer to property's name (pointer to String) */
mem_cpointer_t name_p : ECMA_POINTER_FIELD_WIDTH;
/** Attribute 'Enumerable' (ecma_property_enumerable_value_t) */
unsigned int enumerable : 1;
/** Attribute 'Configurable' (ecma_property_configurable_value_t) */
unsigned int configurable : 1;
/** Flag indicating whether the property is registered in LCache */
unsigned int is_lcached : 1;
/** Compressed pointer to pair of pointers - to property's getter and setter */
mem_cpointer_t getter_setter_pair_cp : ECMA_POINTER_FIELD_WIDTH;
} named_accessor_property;
/** Description of internal property */
struct __attr_packed___ ecma_internal_property_t
{
/** Internal property's type */
unsigned int type : ECMA_PROPERTY_INTERNAL_PROPERTY_TYPE_WIDTH;
/** Value (may be a compressed pointer) */
uint32_t value;
} internal_property;
} u;
} ecma_property_t;
/**
* Types of lexical environments
*/
typedef enum
{
ECMA_LEXICAL_ENVIRONMENT_DECLARATIVE, /**< declarative lexical environment */
ECMA_LEXICAL_ENVIRONMENT_OBJECTBOUND /**< object-bound lexical environment */
} ecma_lexical_environment_type_t;
/**
* Internal object types
*
* Warning:
* definition order is significant (see also dispatch tables in libecmaobjects/ecma-objects.c)
*/
typedef enum
{
ECMA_OBJECT_TYPE_GENERAL, /**< all objects that are not String (15.5), Function (15.3),
Arguments (10.6), Array (15.4) specification-defined objects
and not host objects */
ECMA_OBJECT_TYPE_STRING, /**< String objects (15.5) */
ECMA_OBJECT_TYPE_FUNCTION, /**< Function objects (15.3), created through 13.2 routine */
ECMA_OBJECT_TYPE_EXTERNAL_FUNCTION, /**< External (host) function object */
ECMA_OBJECT_TYPE_BOUND_FUNCTION, /**< Function objects (15.3), created through 15.3.4.5 routine */
ECMA_OBJECT_TYPE_BUILT_IN_FUNCTION, /** One of built-in functions described in section 15
of ECMA-262 v5 specification */
ECMA_OBJECT_TYPE_ARGUMENTS, /**< Arguments object (10.6) */
ECMA_OBJECT_TYPE_ARRAY /**< Array object (15.4) */
// ECMA_OBJECT_TYPE_HOST /**< Host object */
} ecma_object_type_t;
/**
* Description of ECMA-object or lexical environment
* (depending on is_lexical_environment).
*/
typedef struct ecma_object_t
{
/* Common part for objects and lexical environments */
/**
* Compressed pointer to property list
*/
#define ECMA_OBJECT_PROPERTIES_OR_BOUND_OBJECT_CP_POS (0)
#define ECMA_OBJECT_PROPERTIES_OR_BOUND_OBJECT_CP_WIDTH (ECMA_POINTER_FIELD_WIDTH)
/**
* Flag indicating whether it is a general object (false)
* or a lexical environment (true)
*/
#define ECMA_OBJECT_IS_LEXICAL_ENVIRONMENT_POS (ECMA_OBJECT_PROPERTIES_OR_BOUND_OBJECT_CP_POS + \
ECMA_OBJECT_PROPERTIES_OR_BOUND_OBJECT_CP_WIDTH)
#define ECMA_OBJECT_IS_LEXICAL_ENVIRONMENT_WIDTH (1)
/**
* Reference counter of the object, i.e. number of references
* to the object from stack variables.
*/
#define ECMA_OBJECT_GC_REFS_POS (ECMA_OBJECT_IS_LEXICAL_ENVIRONMENT_POS + \
ECMA_OBJECT_IS_LEXICAL_ENVIRONMENT_WIDTH)
#define ECMA_OBJECT_GC_REFS_WIDTH (CONFIG_ECMA_REFERENCE_COUNTER_WIDTH)
/**
* Compressed pointer to next object in the global list of objects with same generation.
*/
#define ECMA_OBJECT_GC_NEXT_CP_POS (ECMA_OBJECT_GC_REFS_POS + \
ECMA_OBJECT_GC_REFS_WIDTH)
#define ECMA_OBJECT_GC_NEXT_CP_WIDTH (ECMA_POINTER_FIELD_WIDTH)
/**
* Marker that is set if the object was visited during graph traverse.
*/
#define ECMA_OBJECT_GC_VISITED_POS (ECMA_OBJECT_GC_NEXT_CP_POS + \
ECMA_OBJECT_GC_NEXT_CP_WIDTH)
#define ECMA_OBJECT_GC_VISITED_WIDTH (1)
/* Objects' only part */
/**
* Attribute 'Extensible'
*/
#define ECMA_OBJECT_OBJ_EXTENSIBLE_POS (ECMA_OBJECT_GC_VISITED_POS + \
ECMA_OBJECT_GC_VISITED_WIDTH)
#define ECMA_OBJECT_OBJ_EXTENSIBLE_WIDTH (1)
/**
* Implementation internal object type (ecma_object_type_t)
*/
#define ECMA_OBJECT_OBJ_TYPE_POS (ECMA_OBJECT_OBJ_EXTENSIBLE_POS + \
ECMA_OBJECT_OBJ_EXTENSIBLE_WIDTH)
#define ECMA_OBJECT_OBJ_TYPE_WIDTH (4)
/**
* Compressed pointer to prototype object (ecma_object_t)
*/
#define ECMA_OBJECT_OBJ_PROTOTYPE_OBJECT_CP_POS (ECMA_OBJECT_OBJ_TYPE_POS + \
ECMA_OBJECT_OBJ_TYPE_WIDTH)
#define ECMA_OBJECT_OBJ_PROTOTYPE_OBJECT_CP_WIDTH (ECMA_POINTER_FIELD_WIDTH)
/**
* Flag indicating whether the object is a built-in object
*/
#define ECMA_OBJECT_OBJ_IS_BUILTIN_POS (ECMA_OBJECT_OBJ_PROTOTYPE_OBJECT_CP_POS + \
ECMA_OBJECT_OBJ_PROTOTYPE_OBJECT_CP_WIDTH)
#define ECMA_OBJECT_OBJ_IS_BUILTIN_WIDTH (1)
/**
* Size of structure for objects
*/
#define ECMA_OBJECT_OBJ_TYPE_SIZE (ECMA_OBJECT_OBJ_IS_BUILTIN_POS + \
ECMA_OBJECT_OBJ_IS_BUILTIN_WIDTH)
/* Lexical environments' only part */
/**
* Type of lexical environment (ecma_lexical_environment_type_t).
*/
#define ECMA_OBJECT_LEX_ENV_TYPE_POS (ECMA_OBJECT_GC_VISITED_POS + \
ECMA_OBJECT_GC_VISITED_WIDTH)
#define ECMA_OBJECT_LEX_ENV_TYPE_WIDTH (1)
/**
* Compressed pointer to outer lexical environment
*/
#define ECMA_OBJECT_LEX_ENV_OUTER_REFERENCE_CP_POS (ECMA_OBJECT_LEX_ENV_TYPE_POS + \
ECMA_OBJECT_LEX_ENV_TYPE_WIDTH)
#define ECMA_OBJECT_LEX_ENV_OUTER_REFERENCE_CP_WIDTH (ECMA_POINTER_FIELD_WIDTH)
/**
* 'provideThis' property of object-bound lexical environments
*/
#define ECMA_OBJECT_LEX_ENV_PROVIDE_THIS_POS (ECMA_OBJECT_LEX_ENV_OUTER_REFERENCE_CP_POS + \
ECMA_OBJECT_LEX_ENV_OUTER_REFERENCE_CP_WIDTH)
#define ECMA_OBJECT_LEX_ENV_PROVIDE_THIS_WIDTH (1)
/**
* Size of structure for lexical environments
*/
#define ECMA_OBJECT_LEX_ENV_TYPE_SIZE (ECMA_OBJECT_LEX_ENV_PROVIDE_THIS_POS + \
ECMA_OBJECT_LEX_ENV_PROVIDE_THIS_WIDTH)
uint64_t container; /**< container for fields described above */
} ecma_object_t;
/**
* Description of ECMA property descriptor
*
* See also: ECMA-262 v5, 8.10.
*
* Note:
* If a component of descriptor is undefined then corresponding
* field should contain it's default value.
*/
typedef struct
{
/** Is [[Value]] defined? */
unsigned int is_value_defined : 1;
/** Is [[Get]] defined? */
unsigned int is_get_defined : 1;
/** Is [[Set]] defined? */
unsigned int is_set_defined : 1;
/** Is [[Writable]] defined? */
unsigned int is_writable_defined : 1;
/** Is [[Enumerable]] defined? */
unsigned int is_enumerable_defined : 1;
/** Is [[Configurable]] defined? */
unsigned int is_configurable_defined : 1;
/** [[Value]] */
ecma_value_t value;
/** [[Get]] */
ecma_object_t* get_p;
/** [[Set]] */
ecma_object_t* set_p;
/** [[Writable]] */
bool is_writable;
/** [[Enumerable]] */
bool is_enumerable;
/** [[Configurable]] */
bool is_configurable;
} ecma_property_descriptor_t;
#if CONFIG_ECMA_CHAR_ENCODING == CONFIG_ECMA_CHAR_ASCII
/**
* Description of an ecma-character
*/
typedef uint8_t ecma_char_t;
#elif CONFIG_ECMA_CHAR_ENCODING == CONFIG_ECMA_CHAR_UTF16
/**
* Description of an ecma-character
*/
typedef uint16_t ecma_char_t;
#endif /* CONFIG_ECMA_CHAR_ENCODING == CONFIG_ECMA_CHAR_UTF16 */
/**
* Description of an ecma-character pointer
*/
typedef ecma_char_t* ecma_char_ptr_t;
#if CONFIG_ECMA_NUMBER_TYPE == CONFIG_ECMA_NUMBER_FLOAT32
/**
* Description of an ecma-number
*/
typedef float ecma_number_t;
#define DOUBLE_TO_ECMA_NUMBER_T(value) static_cast<ecma_number_t> (value)
/**
* Maximum number of significant digits that ecma-number can store
*/
#define ECMA_NUMBER_MAX_DIGITS (9)
#elif CONFIG_ECMA_NUMBER_TYPE == CONFIG_ECMA_NUMBER_FLOAT64
/**
* Description of an ecma-number
*/
typedef double ecma_number_t;
#define DOUBLE_TO_ECMA_NUMBER_T(value) value
/**
* Maximum number of significant digits that ecma-number can store
*/
#define ECMA_NUMBER_MAX_DIGITS (18)
#endif /* CONFIG_ECMA_NUMBER_TYPE == CONFIG_ECMA_NUMBER_FLOAT64 */
/**
* Value '0' of ecma_number_t
*/
#define ECMA_NUMBER_ZERO ((ecma_number_t) 0)
/**
* Value '1' of ecma_number_t
*/
#define ECMA_NUMBER_ONE ((ecma_number_t) 1)
/**
* Value '2' of ecma_number_t
*/
#define ECMA_NUMBER_TWO ((ecma_number_t) 2)
/**
* Value '0.5' of ecma_number_t
*/
#define ECMA_NUMBER_HALF ((ecma_number_t) 0.5f)
/**
* Minimum positive and maximum value of ecma-number
*/
#if CONFIG_ECMA_NUMBER_TYPE == CONFIG_ECMA_NUMBER_FLOAT32
# define ECMA_NUMBER_MIN_VALUE (FLT_MIN)
# define ECMA_NUMBER_MAX_VALUE (FLT_MAX)
#elif CONFIG_ECMA_NUMBER_TYPE == CONFIG_ECMA_NUMBER_FLOAT64
/**
* Number.MAX_VALUE
*
* See also: ECMA_262 v5, 15.7.3.2
*/
# define ECMA_NUMBER_MAX_VALUE ((ecma_number_t)1.7976931348623157e+308)
/**
* Number.MIN_VALUE
*
* See also: ECMA_262 v5, 15.7.3.3
*/
# define ECMA_NUMBER_MIN_VALUE ((ecma_number_t)5e-324)
#endif /* CONFIG_ECMA_NUMBER_TYPE == CONFIG_ECMA_NUMBER_FLOAT64 */
/**
* Euler number
*/
#define ECMA_NUMBER_E ((ecma_number_t)2.7182818284590452354)
/**
* Natural logarithm of 10
*/
#define ECMA_NUMBER_LN10 ((ecma_number_t)2.302585092994046)
/**
* Natural logarithm of 2
*/
#define ECMA_NUMBER_LN2 ((ecma_number_t)0.6931471805599453)
/**
* Logarithm base 2 of the Euler number
*/
#define ECMA_NUMBER_LOG2E ((ecma_number_t)1.4426950408889634)
/**
* Logarithm base 10 of the Euler number
*/
#define ECMA_NUMBER_LOG10E ((ecma_number_t)0.4342944819032518)
/**
* Pi number
*/
#define ECMA_NUMBER_PI ((ecma_number_t)3.1415926535897932)
/**
* Square root of 0.5
*/
#define ECMA_NUMBER_SQRT_1_2 ((ecma_number_t)0.7071067811865476)
/**
* Square root of 2
*/
#define ECMA_NUMBER_SQRT2 ((ecma_number_t)1.4142135623730951)
/**
* Null character (zt-string end marker)
*/
#define ECMA_CHAR_NULL ((ecma_char_t) '\0')
/**
* Maximum number of characters in string representation of ecma-number
*/
#define ECMA_MAX_CHARS_IN_STRINGIFIED_NUMBER 64
/**
* Maximum number of characters in string representation of ecma-uint32
*/
#define ECMA_MAX_CHARS_IN_STRINGIFIED_UINT32 32
/**
* Maximum value of valid array index
*
* See also:
* ECMA-262 v5, 15.4
*/
#define ECMA_MAX_VALUE_OF_VALID_ARRAY_INDEX ((uint32_t) (-1))
/**
* Description of a collection's/string's length
*/
typedef uint16_t ecma_length_t;
/**
* Description of a collection's header.
*/
typedef struct
{
/** Compressed pointer to next chunk with collection's data */
mem_cpointer_t next_chunk_cp;
/** Number of elements in the collection */
ecma_length_t unit_number;
/** Place for the collection's data */
uint8_t data[ sizeof (uint64_t) - sizeof (mem_cpointer_t) - sizeof (ecma_length_t) ];
} ecma_collection_header_t;
/**
* Description of non-first chunk in a collection's chain of chunks
*/
typedef struct
{
/** Compressed pointer to next chunk */
mem_cpointer_t next_chunk_cp;
/** Characters */
uint8_t data[ sizeof (uint64_t) - sizeof (mem_cpointer_t) ];
} ecma_collection_chunk_t;
/**
* Identifier for ecma-string's actual data container
*/
typedef enum
{
ECMA_STRING_CONTAINER_LIT_TABLE, /**< actual data is in literal table */
ECMA_STRING_CONTAINER_HEAP_CHUNKS, /**< actual data is on the heap
in a ecma_collection_chunk_t chain */
ECMA_STRING_CONTAINER_HEAP_NUMBER, /**< actual data is on the heap as a ecma_number_t */
ECMA_STRING_CONTAINER_UINT32_IN_DESC, /**< actual data is UInt32-represeneted Number
stored locally in the string's descriptor */
ECMA_STRING_CONTAINER_CONCATENATION, /**< the ecma-string is concatenation of two specified ecma-strings */
ECMA_STRING_CONTAINER_MAGIC_STRING, /**< the ecma-string is equal to one of ECMA magic strings */
ECMA_STRING_CONTAINER_MAGIC_STRING_EX /**< the ecma-string is equal to one of external magic strings */
} ecma_string_container_t;
FIXME (Move to library that should define the type (literal.h /* ? */))
/**
* Literal and compressed pointer to literal
*/
typedef rcs_record_t *literal_t;
typedef rcs_cpointer_t lit_cpointer_t;
/**
* Identifiers of ECMA and implementation-defined magic string constants
*/
typedef enum
{
#define ECMA_MAGIC_STRING_DEF(id, ascii_zt_string) \
id,
#include "ecma-magic-strings.inc.h"
#undef ECMA_MAGIC_STRING_DEF
ECMA_MAGIC_STRING__COUNT /**< number of magic strings */
} ecma_magic_string_id_t;
/**
* Identifiers of implementation-defined external magic string constants
*/
typedef uint32_t ecma_magic_string_ex_id_t;
/**
* ECMA string hash
*/
typedef uint8_t ecma_string_hash_t;
/**
* Length of string hash, in bits
*/
#define ECMA_STRING_HASH_BITS (sizeof (ecma_string_hash_t) * JERRY_BITSINBYTE)
/**
* Number of string's last characters to use for hash calculation
*/
#define ECMA_STRING_HASH_LAST_CHARS_COUNT (2)
/**
* ECMA string-value descriptor
*/
typedef struct ecma_string_t
{
/** Reference counter for the string */
unsigned int refs : CONFIG_ECMA_REFERENCE_COUNTER_WIDTH;
/** Flag indicating whether the string descriptor is placed
* in a stack variable (not in the heap) */
unsigned int is_stack_var : 1;
/** Where the string's data is placed (ecma_string_container_t) */
uint8_t container;
/** Hash of the string (calculated from two last characters of the string) */
ecma_string_hash_t hash;
/**
* Actual data or identifier of it's place in container (depending on 'container' field)
*/
union
{
/** Index of string in literal table */
lit_cpointer_t lit_cp;
/** Compressed pointer to an ecma_collection_header_t */
mem_cpointer_t collection_cp : ECMA_POINTER_FIELD_WIDTH;
/** Compressed pointer to an ecma_number_t */
mem_cpointer_t number_cp : ECMA_POINTER_FIELD_WIDTH;
/** UInt32-represented number placed locally in the descriptor */
uint32_t uint32_number;
/** Representation of concatenation */
struct
{
mem_cpointer_t string1_cp : ECMA_POINTER_FIELD_WIDTH;
mem_cpointer_t string2_cp : ECMA_POINTER_FIELD_WIDTH;
} concatenation;
/** Identifier of magic string */
ecma_magic_string_id_t magic_string_id;
/** Identifier of external magic string */
ecma_magic_string_ex_id_t magic_string_ex_id;
/** For zeroing and comparison in some cases */
uint32_t common_field;
} u;
} ecma_string_t;
/**
* Representation for native external pointer
*/
typedef uintptr_t ecma_external_pointer_t;
/**
* @}
*/
#endif /* JERRY_ECMA_GLOBALS_H */
/**
* @}
* @}
*/
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