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Commit	Line	Data
6fe7ccc8	1	/*
ed1e77d3	2	* Copyright (C) 2011, 2015 Apple Inc. All rights reserved.
6fe7ccc8 A	3	*
	4	* Redistribution and use in source and binary forms, with or without
	5	* modification, are permitted provided that the following conditions
	6	* are met:
	7	* 1. Redistributions of source code must retain the above copyright
	8	* notice, this list of conditions and the following disclaimer.
	9	* 2. Redistributions in binary form must reproduce the above copyright
	10	* notice, this list of conditions and the following disclaimer in the
	11	* documentation and/or other materials provided with the distribution.
	12	*
	13	* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
	14	* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	15	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
	16	* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
	17	* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
	18	* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
	19	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
	20	* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
	21	* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	22	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
	23	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	24	*/
	25
	26	#ifndef DataFormat_h
	27	#define DataFormat_h
	28
	29	#include <wtf/Assertions.h>
	30
	31	namespace JSC {
	32
	33	// === DataFormat ===
	34	//
	35	// This enum tracks the current representation in which a value is being held.
	36	// Values may be unboxed primitives (int32, double, or cell), or boxed as a JSValue.
	37	// For boxed values, we may know the type of boxing that has taken place.
	38	// (May also need bool, array, object, string types!)
	39	enum DataFormat {
	40	DataFormatNone = 0,
81345200 A	41	DataFormatInt32 = 1,
	42	DataFormatInt52 = 2, // Int52's are left-shifted by 16 by default.
	43	DataFormatStrictInt52 = 3, // "Strict" Int52 means it's not shifted.
	44	DataFormatDouble = 4,
	45	DataFormatBoolean = 5,
	46	DataFormatCell = 6,
	47	DataFormatStorage = 7,
6fe7ccc8	48	DataFormatJS = 8,
81345200	49	DataFormatJSInt32 = DataFormatJS \| DataFormatInt32,
6fe7ccc8 A	50	DataFormatJSDouble = DataFormatJS \| DataFormatDouble,
6fe7ccc8 A	51	DataFormatJSCell = DataFormatJS \| DataFormatCell,
93a37866 A	52	DataFormatJSBoolean = DataFormatJS \| DataFormatBoolean,
	53
	54	// Marker deliminating ordinary data formats and OSR-only data formats.
	55	DataFormatOSRMarker = 32,
	56
	57	// Special data formats used only for OSR.
	58	DataFormatDead = 33, // Implies jsUndefined().
6fe7ccc8 A	59	};
	60
	61	inline const char* dataFormatToString(DataFormat dataFormat)
	62	{
	63	switch (dataFormat) {
	64	case DataFormatNone:
	65	return "None";
81345200 A	66	case DataFormatInt32:
	67	return "Int32";
	68	case DataFormatInt52:
	69	return "Int52";
	70	case DataFormatStrictInt52:
	71	return "StrictInt52";
6fe7ccc8 A	72	case DataFormatDouble:
	73	return "Double";
	74	case DataFormatCell:
	75	return "Cell";
	76	case DataFormatBoolean:
	77	return "Boolean";
	78	case DataFormatStorage:
	79	return "Storage";
	80	case DataFormatJS:
	81	return "JS";
81345200 A	82	case DataFormatJSInt32:
81345200 A	83	return "JSInt32";
6fe7ccc8 A	84	case DataFormatJSDouble:
	85	return "JSDouble";
	86	case DataFormatJSCell:
	87	return "JSCell";
	88	case DataFormatJSBoolean:
	89	return "JSBoolean";
93a37866 A	90	case DataFormatDead:
93a37866 A	91	return "Dead";
6fe7ccc8	92	default:
93a37866	93	RELEASE_ASSERT_NOT_REACHED();
6fe7ccc8 A	94	return "Unknown";
	95	}
	96	}
	97
6fe7ccc8 A	98	inline bool isJSFormat(DataFormat format, DataFormat expectedFormat)
	99	{
	100	ASSERT(expectedFormat & DataFormatJS);
	101	return (format \| DataFormatJS) == expectedFormat;
	102	}
	103
81345200	104	inline bool isJSInt32(DataFormat format)
6fe7ccc8	105	{
81345200	106	return isJSFormat(format, DataFormatJSInt32);
6fe7ccc8 A	107	}
	108
	109	inline bool isJSDouble(DataFormat format)
	110	{
	111	return isJSFormat(format, DataFormatJSDouble);
	112	}
	113
	114	inline bool isJSCell(DataFormat format)
	115	{
	116	return isJSFormat(format, DataFormatJSCell);
	117	}
	118
	119	inline bool isJSBoolean(DataFormat format)
	120	{
	121	return isJSFormat(format, DataFormatJSBoolean);
	122	}
	123
	124	}
	125
	126	#endif // DataFormat_h