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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* vim: set ts=8 sts=2 et sw=2 tw=80:
* 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/. */
/* An enumeration of all possible element types in typed data. */
#ifndef js_ScalarType_h
#define js_ScalarType_h
#include "mozilla/Assertions.h" // MOZ_CRASH
#include <stddef.h> // size_t
namespace JS {
namespace Scalar {
// Scalar types that can appear in typed arrays.
// The enum values must be kept in sync with:
//
// * the TYPEDARRAY_KIND constants
// * the SCTAG_TYPED_ARRAY constants
// * JS_FOR_EACH_TYPED_ARRAY
// * JS_FOR_PROTOTYPES_
// * JS_FOR_EACH_UNIQUE_SCALAR_TYPE_REPR_CTYPE
// * JIT compilation
//
// and the existing entries here must not be renumbered, since they are
// necessary for backwards compatibility with structured clones from previous
// versions. (It is fine to add new entries and increment
// MaxTypedArrayViewType, or change anything at or after
// MaxTypedArrayViewType.)
enum Type {
Int8 = 0,
Uint8,
Int16,
Uint16,
Int32,
Uint32,
Float32,
Float64,
/**
* Special type that is a uint8_t, but assignments are clamped to [0, 256).
* Treat the raw data type as a uint8_t.
*/
Uint8Clamped,
BigInt64,
BigUint64,
/**
* Types that don't have their own TypedArray equivalent, for now.
* E.g. DataView
*/
MaxTypedArrayViewType,
Int64,
Simd128,
};
static inline size_t byteSize(Type atype) {
switch (atype) {
case Int8:
case Uint8:
case Uint8Clamped:
return 1;
case Int16:
case Uint16:
return 2;
case Int32:
case Uint32:
case Float32:
return 4;
case Int64:
case Float64:
case BigInt64:
case BigUint64:
return 8;
case Simd128:
return 16;
case MaxTypedArrayViewType:
break;
}
MOZ_CRASH("invalid scalar type");
}
static inline bool isSignedIntType(Type atype) {
switch (atype) {
case Int8:
case Int16:
case Int32:
case Int64:
case BigInt64:
return true;
case Uint8:
case Uint8Clamped:
case Uint16:
case Uint32:
case Float32:
case Float64:
case BigUint64:
case Simd128:
return false;
case MaxTypedArrayViewType:
break;
}
MOZ_CRASH("invalid scalar type");
}
static inline bool isBigIntType(Type atype) {
switch (atype) {
case BigInt64:
case BigUint64:
return true;
case Int8:
case Int16:
case Int32:
case Int64:
case Uint8:
case Uint8Clamped:
case Uint16:
case Uint32:
case Float32:
case Float64:
case Simd128:
return false;
case MaxTypedArrayViewType:
break;
}
MOZ_CRASH("invalid scalar type");
}
static inline bool isFloatingType(Type atype) {
switch (atype) {
case Int8:
case Uint8:
case Uint8Clamped:
case Int16:
case Uint16:
case Int32:
case Uint32:
case Int64:
case BigInt64:
case BigUint64:
return false;
case Float32:
case Float64:
case Simd128:
return true;
case MaxTypedArrayViewType:
break;
}
MOZ_CRASH("invalid scalar type");
}
static inline const char* name(Type atype) {
switch (atype) {
case Int8:
return "Int8";
case Uint8:
return "Uint8";
case Int16:
return "Int16";
case Uint16:
return "Uint16";
case Int32:
return "Int32";
case Uint32:
return "Uint32";
case Float32:
return "Float32";
case Float64:
return "Float64";
case Uint8Clamped:
return "Uint8Clamped";
case BigInt64:
return "BigInt64";
case BigUint64:
return "BigUint64";
case MaxTypedArrayViewType:
return "MaxTypedArrayViewType";
case Int64:
return "Int64";
case Simd128:
return "Simd128";
}
MOZ_CRASH("invalid scalar type");
}
static inline const char* byteSizeString(Type atype) {
switch (atype) {
case Int8:
case Uint8:
case Uint8Clamped:
return "1";
case Int16:
case Uint16:
return "2";
case Int32:
case Uint32:
case Float32:
return "4";
case Int64:
case Float64:
case BigInt64:
case BigUint64:
return "8";
case Simd128:
return "16";
case MaxTypedArrayViewType:
break;
}
MOZ_CRASH("invalid scalar type");
}
} // namespace Scalar
} // namespace JS
namespace js {
// This is aliased in NamespaceImports.h, but that is internal-only and
// inaccessible to Gecko code, which uses this type fairly heavily. Until such
// uses are changed, we need the alias here as well.
namespace Scalar = JS::Scalar;
} // namespace js
#endif // js_ScalarType_h
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