/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 * 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/. */

// Specialized .h file to be used by both JS and C++ code.

#ifndef builtin_TypedObjectConstants_h
#define builtin_TypedObjectConstants_h

///////////////////////////////////////////////////////////////////////////
// Values to be returned by SetFromTypedArrayApproach

#define JS_SETTYPEDARRAY_SAME_TYPE 0
#define JS_SETTYPEDARRAY_OVERLAPPING 1
#define JS_SETTYPEDARRAY_DISJOINT 2

///////////////////////////////////////////////////////////////////////////
// Slots for objects using the typed array layout

#define JS_TYPEDARRAYLAYOUT_BUFFER_SLOT 0
#define JS_TYPEDARRAYLAYOUT_LENGTH_SLOT 1
#define JS_TYPEDARRAYLAYOUT_BYTEOFFSET_SLOT 2

///////////////////////////////////////////////////////////////////////////
// Slots and flags for ArrayBuffer objects

#define JS_ARRAYBUFFER_FLAGS_SLOT            3

#define JS_ARRAYBUFFER_DETACHED_FLAG 0x4

///////////////////////////////////////////////////////////////////////////
// Slots for typed prototypes

#define JS_TYPROTO_SLOTS                 0

///////////////////////////////////////////////////////////////////////////
// Slots for type objects
//
// Some slots apply to all type objects and some are specific to
// particular kinds of type objects. For simplicity we use the same
// number of slots no matter what kind of type descriptor we are
// working with, even though this is mildly wasteful.

// Slots on all type objects
#define JS_DESCR_SLOT_KIND               0  // Atomized string representation
#define JS_DESCR_SLOT_STRING_REPR        1  // Atomized string representation
#define JS_DESCR_SLOT_ALIGNMENT          2  // Alignment in bytes
#define JS_DESCR_SLOT_SIZE               3  // Size in bytes, else 0
#define JS_DESCR_SLOT_OPAQUE             4  // Atomized string representation
#define JS_DESCR_SLOT_TYPROTO            5  // Prototype for instances, if any
#define JS_DESCR_SLOT_ARRAYPROTO         6  // Lazily created prototype for arrays
#define JS_DESCR_SLOT_TRACE_LIST         7  // List of references for use in tracing

// Slots on scalars and references
#define JS_DESCR_SLOT_TYPE               8  // Type code

// Slots on array descriptors
#define JS_DESCR_SLOT_ARRAY_ELEM_TYPE    8
#define JS_DESCR_SLOT_ARRAY_LENGTH       9

// Slots on struct type objects
#define JS_DESCR_SLOT_STRUCT_FIELD_NAMES 8
#define JS_DESCR_SLOT_STRUCT_FIELD_TYPES 9
#define JS_DESCR_SLOT_STRUCT_FIELD_OFFSETS 10

// Maximum number of slots for any descriptor
#define JS_DESCR_SLOTS                   11

// These constants are for use exclusively in JS code. In C++ code,
// prefer TypeRepresentation::Scalar etc, which allows you to
// write a switch which will receive a warning if you omit a case.
#define JS_TYPEREPR_SCALAR_KIND         1
#define JS_TYPEREPR_REFERENCE_KIND      2
#define JS_TYPEREPR_STRUCT_KIND         3
#define JS_TYPEREPR_ARRAY_KIND          4

// These constants are for use exclusively in JS code. In C++ code,
// prefer Scalar::Int8 etc, which allows you to write a switch which will
// receive a warning if you omit a case.
#define JS_SCALARTYPEREPR_INT8          0
#define JS_SCALARTYPEREPR_UINT8         1
#define JS_SCALARTYPEREPR_INT16         2
#define JS_SCALARTYPEREPR_UINT16        3
#define JS_SCALARTYPEREPR_INT32         4
#define JS_SCALARTYPEREPR_UINT32        5
#define JS_SCALARTYPEREPR_FLOAT32       6
#define JS_SCALARTYPEREPR_FLOAT64       7
#define JS_SCALARTYPEREPR_UINT8_CLAMPED 8
#define JS_SCALARTYPEREPR_BIGINT64      9
#define JS_SCALARTYPEREPR_BIGUINT64     10

// These constants are for use exclusively in JS code. In C++ code,
// prefer ReferenceTypeRepresentation::TYPE_ANY etc, which allows
// you to write a switch which will receive a warning if you omit a
// case.
#define JS_REFERENCETYPEREPR_ANY        0
#define JS_REFERENCETYPEREPR_OBJECT     1
#define JS_REFERENCETYPEREPR_STRING     2

#endif