mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
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151 lines
3.4 KiB
C++
151 lines
3.4 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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* vim: set ts=8 sts=4 et sw=4 tw=99:
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef js_Id_h
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#define js_Id_h
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#include "jstypes.h"
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#include "js/IdForward.h"
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#include "js/Utility.h"
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class JSObject;
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class JSString;
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#ifdef JS_USE_JSID_STRUCT_TYPES
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struct jsid
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{
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size_t asBits;
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bool operator==(jsid rhs) const { return asBits == rhs.asBits; }
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bool operator!=(jsid rhs) const { return asBits != rhs.asBits; }
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};
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# define JSID_BITS(id) (id.asBits)
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#else
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# define JSID_BITS(id) (id)
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#endif
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#define JSID_TYPE_STRING 0x0
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#define JSID_TYPE_INT 0x1
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#define JSID_TYPE_VOID 0x2
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#define JSID_TYPE_OBJECT 0x4
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#define JSID_TYPE_MASK 0x7
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// Avoid using canonical 'id' for jsid parameters since this is a magic word in
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// Objective-C++ which, apparently, wants to be able to #include jsapi.h.
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#define id iden
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static JS_ALWAYS_INLINE bool
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JSID_IS_STRING(jsid id)
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{
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return (JSID_BITS(id) & JSID_TYPE_MASK) == 0;
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}
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static JS_ALWAYS_INLINE JSString *
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JSID_TO_STRING(jsid id)
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{
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JS_ASSERT(JSID_IS_STRING(id));
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return (JSString *)JSID_BITS(id);
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}
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static JS_ALWAYS_INLINE bool
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JSID_IS_ZERO(jsid id)
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{
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return JSID_BITS(id) == 0;
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}
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static JS_ALWAYS_INLINE bool
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JSID_IS_INT(jsid id)
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{
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return !!(JSID_BITS(id) & JSID_TYPE_INT);
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}
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static JS_ALWAYS_INLINE int32_t
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JSID_TO_INT(jsid id)
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{
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JS_ASSERT(JSID_IS_INT(id));
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return ((uint32_t)JSID_BITS(id)) >> 1;
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}
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#define JSID_INT_MIN 0
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#define JSID_INT_MAX INT32_MAX
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static JS_ALWAYS_INLINE bool
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INT_FITS_IN_JSID(int32_t i)
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{
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return i >= 0;
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}
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static JS_ALWAYS_INLINE jsid
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INT_TO_JSID(int32_t i)
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{
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jsid id;
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JS_ASSERT(INT_FITS_IN_JSID(i));
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JSID_BITS(id) = ((i << 1) | JSID_TYPE_INT);
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return id;
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}
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static JS_ALWAYS_INLINE bool
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JSID_IS_OBJECT(jsid id)
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{
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return (JSID_BITS(id) & JSID_TYPE_MASK) == JSID_TYPE_OBJECT &&
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(size_t)JSID_BITS(id) != JSID_TYPE_OBJECT;
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}
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static JS_ALWAYS_INLINE JSObject *
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JSID_TO_OBJECT(jsid id)
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{
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JS_ASSERT(JSID_IS_OBJECT(id));
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return (JSObject *)(JSID_BITS(id) & ~(size_t)JSID_TYPE_MASK);
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}
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static JS_ALWAYS_INLINE jsid
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OBJECT_TO_JSID(JSObject *obj)
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{
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jsid id;
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JS_ASSERT(obj != NULL);
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JS_ASSERT(((size_t)obj & JSID_TYPE_MASK) == 0);
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JSID_BITS(id) = ((size_t)obj | JSID_TYPE_OBJECT);
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return id;
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}
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static JS_ALWAYS_INLINE bool
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JSID_IS_GCTHING(jsid id)
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{
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return JSID_IS_STRING(id) || JSID_IS_OBJECT(id);
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}
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static JS_ALWAYS_INLINE void *
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JSID_TO_GCTHING(jsid id)
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{
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return (void *)(JSID_BITS(id) & ~(size_t)JSID_TYPE_MASK);
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}
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static JS_ALWAYS_INLINE bool
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JSID_IS_VOID(const jsid id)
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{
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JS_ASSERT_IF(((size_t)JSID_BITS(id) & JSID_TYPE_MASK) == JSID_TYPE_VOID,
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JSID_BITS(id) == JSID_TYPE_VOID);
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return ((size_t)JSID_BITS(id) == JSID_TYPE_VOID);
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}
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static JS_ALWAYS_INLINE bool
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JSID_IS_EMPTY(const jsid id)
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{
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return ((size_t)JSID_BITS(id) == JSID_TYPE_OBJECT);
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}
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#undef id
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#ifdef JS_USE_JSID_STRUCT_TYPES
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extern JS_PUBLIC_DATA(const jsid) JSID_VOID;
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extern JS_PUBLIC_DATA(const jsid) JSID_EMPTY;
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#else
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# define JSID_VOID ((jsid)JSID_TYPE_VOID)
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# define JSID_EMPTY ((jsid)JSID_TYPE_OBJECT)
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#endif
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#endif /* js_Id_h */
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