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Diffstat (limited to '')
| -rw-r--r-- | xpcom/reflect/xptinfo/xptinfo.h | 711 |
1 files changed, 711 insertions, 0 deletions
diff --git a/xpcom/reflect/xptinfo/xptinfo.h b/xpcom/reflect/xptinfo/xptinfo.h new file mode 100644 index 0000000000..2456c2c2b5 --- /dev/null +++ b/xpcom/reflect/xptinfo/xptinfo.h @@ -0,0 +1,711 @@ +/* -*- 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 https://mozilla.org/MPL/2.0/. */ + +/** + * Structures and methods with information about XPCOM interfaces for use by + * XPConnect. The static backing data structures used by this file are generated + * from xpidl interfaces by the jsonxpt.py and xptcodegen.py scripts. + */ + +#ifndef xptinfo_h +#define xptinfo_h + +#include <stdint.h> +#include "nsID.h" +#include "mozilla/Assertions.h" +#include "jsapi.h" +#include "js/Symbol.h" +#include "js/Value.h" +#include "nsString.h" +#include "nsTArray.h" + +// Forward Declarations +namespace mozilla { +namespace dom { +struct NativePropertyHooks; +} // namespace dom +} // namespace mozilla + +struct nsXPTInterfaceInfo; +struct nsXPTType; +struct nsXPTParamInfo; +struct nsXPTMethodInfo; +struct nsXPTConstantInfo; +struct nsXPTDOMObjectInfo; + +enum class nsXPTInterface : uint16_t; + +// Internal helper methods. +namespace xpt { +namespace detail { + +inline const nsXPTInterfaceInfo* GetInterface(uint16_t aIndex); +inline const nsXPTType& GetType(uint16_t aIndex); +inline const nsXPTParamInfo& GetParam(uint16_t aIndex); +inline const nsXPTMethodInfo& GetMethod(uint16_t aIndex); +inline const nsXPTConstantInfo& GetConstant(uint16_t aIndex); +inline const nsXPTDOMObjectInfo& GetDOMObjectInfo(uint16_t aIndex); +inline const char* GetString(uint32_t aIndex); + +const nsXPTInterfaceInfo* InterfaceByIID(const nsIID& aIID); +const nsXPTInterfaceInfo* InterfaceByName(const char* aName); + +extern const uint16_t sInterfacesSize; + +} // namespace detail +} // namespace xpt + +/* + * An Interface describes a single XPCOM interface, including all of its + * methods. We don't record non-scriptable interfaces. + */ +struct nsXPTInterfaceInfo { + // High efficiency getters for Interfaces based on perfect hashes. + static const nsXPTInterfaceInfo* ByIID(const nsIID& aIID) { + return xpt::detail::InterfaceByIID(aIID); + } + static const nsXPTInterfaceInfo* ByName(const char* aName) { + return xpt::detail::InterfaceByName(aName); + } + + static const nsXPTInterfaceInfo* Get(nsXPTInterface aID) { + return ByIndex(uint16_t(aID)); + } + + // These are only needed for Components_interfaces's enumerator. + static const nsXPTInterfaceInfo* ByIndex(uint16_t aIndex) { + // NOTE: We add 1 here, as the internal index 0 is reserved for null. + return xpt::detail::GetInterface(aIndex + 1); + } + static uint16_t InterfaceCount() { return xpt::detail::sInterfacesSize; } + + // Interface flag getters + bool IsFunction() const { return mFunction; } + bool IsBuiltinClass() const { return mBuiltinClass; } + bool IsMainProcessScriptableOnly() const { + return mMainProcessScriptableOnly; + } + + const char* Name() const { return xpt::detail::GetString(mName); } + const nsIID& IID() const { return mIID; } + + // Get the parent interface, or null if this interface doesn't have a parent. + const nsXPTInterfaceInfo* GetParent() const { + return xpt::detail::GetInterface(mParent); + } + + // Do we have an ancestor interface with the given IID? + bool HasAncestor(const nsIID& aIID) const; + + // Get methods & constants + uint16_t ConstantCount() const { return mNumConsts; } + const nsXPTConstantInfo& Constant(uint16_t aIndex) const; + uint16_t MethodCount() const { return mNumMethods; } + const nsXPTMethodInfo& Method(uint16_t aIndex) const; + + nsresult GetMethodInfo(uint16_t aIndex, const nsXPTMethodInfo** aInfo) const; + nsresult GetConstant(uint16_t aIndex, JS::MutableHandle<JS::Value> constant, + char** aName) const; + + //////////////////////////////////////////////////////////////// + // Ensure these fields are in the same order as xptcodegen.py // + //////////////////////////////////////////////////////////////// + + nsID mIID; + uint32_t mName; // Index into xpt::detail::sStrings + + uint16_t mParent : 14; + uint16_t mBuiltinClass : 1; + // XXX(nika): Do we need this if we don't have addons anymore? + uint16_t mMainProcessScriptableOnly : 1; + + uint16_t mMethods; // Index into xpt::detail::sMethods + + uint16_t mConsts : 14; // Index into xpt::detail::sConsts + uint16_t mFunction : 1; + // uint16_t unused : 1; + + uint8_t mNumMethods; // NOTE(24/04/18): largest=nsIDocShell (193) + uint8_t mNumConsts; // NOTE(24/04/18): largest=nsIAccessibleRole (175) +}; + +// The fields in nsXPTInterfaceInfo were carefully ordered to minimize size. +static_assert(sizeof(nsXPTInterfaceInfo) == 28, "wrong size?"); + +/* + * The following enum represents contains the different tag types which + * can be found in nsXPTTypeInfo::mTag. + * + * WARNING: mTag is 5 bits wide, supporting at most 32 tags. + */ +enum nsXPTTypeTag : uint8_t { + // Arithmetic (POD) Types + // - Do not require cleanup, + // - All bit patterns are valid, + // - Outparams may be uninitialized by caller, + // - Directly supported in xptcall. + // + // NOTE: The name 'Arithmetic' comes from Harbison/Steele. Despite being a tad + // unclear, it is used frequently in xptcall, so is unlikely to be changed. + TD_INT8 = 0, + TD_INT16 = 1, + TD_INT32 = 2, + TD_INT64 = 3, + TD_UINT8 = 4, + TD_UINT16 = 5, + TD_UINT32 = 6, + TD_UINT64 = 7, + TD_FLOAT = 8, + TD_DOUBLE = 9, + TD_BOOL = 10, + TD_CHAR = 11, + TD_WCHAR = 12, + _TD_LAST_ARITHMETIC = TD_WCHAR, + + // Pointer Types + // - Require cleanup unless NULL, + // - All-zeros (NULL) bit pattern is valid, + // - Outparams may be uninitialized by caller, + // - Supported in xptcall as raw pointer. + TD_VOID = 13, + TD_NSIDPTR = 14, + TD_PSTRING = 15, + TD_PWSTRING = 16, + TD_INTERFACE_TYPE = 17, + TD_INTERFACE_IS_TYPE = 18, + TD_LEGACY_ARRAY = 19, + TD_PSTRING_SIZE_IS = 20, + TD_PWSTRING_SIZE_IS = 21, + TD_DOMOBJECT = 22, + TD_PROMISE = 23, + _TD_LAST_POINTER = TD_PROMISE, + + // Complex Types + // - Require cleanup, + // - Always passed indirectly, + // - Outparams must be initialized by caller, + // - Supported in xptcall due to indirection. + TD_UTF8STRING = 24, + TD_CSTRING = 25, + TD_ASTRING = 26, + TD_NSID = 27, + TD_JSVAL = 28, + TD_ARRAY = 29, + _TD_LAST_COMPLEX = TD_ARRAY +}; + +static_assert(_TD_LAST_COMPLEX < 32, "nsXPTTypeTag must fit in 5 bits"); + +/* + * A nsXPTType is a union used to identify the type of a method argument or + * return value. The internal data is stored as an 5-bit tag, and two 8-bit + * integers, to keep alignment requirements low. + * + * nsXPTType contains 3 extra bits, reserved for use by nsXPTParamInfo. + */ +struct nsXPTType { + nsXPTTypeTag Tag() const { return static_cast<nsXPTTypeTag>(mTag); } + + // The index in the function argument list which should be used when + // determining the iid_is or size_is properties of this dependent type. + uint8_t ArgNum() const { + MOZ_ASSERT(Tag() == TD_INTERFACE_IS_TYPE || Tag() == TD_PSTRING_SIZE_IS || + Tag() == TD_PWSTRING_SIZE_IS || Tag() == TD_LEGACY_ARRAY); + return mData1; + } + + private: + // Helper for reading 16-bit data values split between mData1 and mData2. + uint16_t Data16() const { + return static_cast<uint16_t>(mData1 << 8) | mData2; + } + + public: + // Get the type of the element in the current array or sequence. Arrays only + // fit 8 bits of type data, while sequences support up to 16 bits of type data + // due to not needing to store an ArgNum. + const nsXPTType& ArrayElementType() const { + if (Tag() == TD_LEGACY_ARRAY) { + return xpt::detail::GetType(mData2); + } + MOZ_ASSERT(Tag() == TD_ARRAY); + return xpt::detail::GetType(Data16()); + } + + // We store the 16-bit iface value as two 8-bit values in order to + // avoid 16-bit alignment requirements for XPTTypeDescriptor, which + // reduces its size and also the size of XPTParamDescriptor. + const nsXPTInterfaceInfo* GetInterface() const { + MOZ_ASSERT(Tag() == TD_INTERFACE_TYPE); + return xpt::detail::GetInterface(Data16()); + } + + const nsXPTDOMObjectInfo& GetDOMObjectInfo() const { + MOZ_ASSERT(Tag() == TD_DOMOBJECT); + return xpt::detail::GetDOMObjectInfo(Data16()); + } + + // See the comments in nsXPTTypeTag for an explanation as to what each of + // these categories mean. + bool IsArithmetic() const { return Tag() <= _TD_LAST_ARITHMETIC; } + bool IsPointer() const { + return !IsArithmetic() && Tag() <= _TD_LAST_POINTER; + } + bool IsComplex() const { return Tag() > _TD_LAST_POINTER; } + + bool IsInterfacePointer() const { + return Tag() == TD_INTERFACE_TYPE || Tag() == TD_INTERFACE_IS_TYPE; + } + + bool IsDependent() const { + return (Tag() == TD_ARRAY && InnermostType().IsDependent()) || + Tag() == TD_INTERFACE_IS_TYPE || Tag() == TD_LEGACY_ARRAY || + Tag() == TD_PSTRING_SIZE_IS || Tag() == TD_PWSTRING_SIZE_IS; + } + + // Unwrap a nested type to its innermost value (e.g. through arrays). + const nsXPTType& InnermostType() const { + if (Tag() == TD_LEGACY_ARRAY || Tag() == TD_ARRAY) { + return ArrayElementType().InnermostType(); + } + return *this; + } + + // In-memory size of native type in bytes. + inline size_t Stride() const; + + // Offset the given base pointer to reference the element at the given index. + void* ElementPtr(const void* aBase, uint32_t aIndex) const { + return (char*)aBase + (aIndex * Stride()); + } + + // Zero out a native value of the given type. The type must not be 'complex'. + void ZeroValue(void* aValue) const { + MOZ_RELEASE_ASSERT(!IsComplex(), "Cannot zero a complex value"); + memset(aValue, 0, Stride()); + } + + // Indexes into the extra types array of a small set of known types. + enum class Idx : uint8_t { + INT8 = 0, + UINT8, + INT16, + UINT16, + INT32, + UINT32, + INT64, + UINT64, + FLOAT, + DOUBLE, + BOOL, + CHAR, + WCHAR, + NSIDPTR, + PSTRING, + PWSTRING, + INTERFACE_IS_TYPE + }; + + // Helper methods for fabricating nsXPTType values used by xpconnect. + static nsXPTType MkArrayType(Idx aInner) { + MOZ_ASSERT(aInner <= Idx::INTERFACE_IS_TYPE); + return {TD_LEGACY_ARRAY, false, false, false, 0, (uint8_t)aInner}; + } + static const nsXPTType& Get(Idx aInner) { + MOZ_ASSERT(aInner <= Idx::INTERFACE_IS_TYPE); + return xpt::detail::GetType((uint8_t)aInner); + } + + /////////////////////////////////////// + // nsXPTType backwards compatibility // + /////////////////////////////////////// + + nsXPTType& operator=(nsXPTTypeTag aPrefix) { + mTag = aPrefix; + return *this; + } + operator nsXPTTypeTag() const { return Tag(); } + +#define TD_ALIAS_(name_, value_) static constexpr nsXPTTypeTag name_ = value_ + TD_ALIAS_(T_I8, TD_INT8); + TD_ALIAS_(T_I16, TD_INT16); + TD_ALIAS_(T_I32, TD_INT32); + TD_ALIAS_(T_I64, TD_INT64); + TD_ALIAS_(T_U8, TD_UINT8); + TD_ALIAS_(T_U16, TD_UINT16); + TD_ALIAS_(T_U32, TD_UINT32); + TD_ALIAS_(T_U64, TD_UINT64); + TD_ALIAS_(T_FLOAT, TD_FLOAT); + TD_ALIAS_(T_DOUBLE, TD_DOUBLE); + TD_ALIAS_(T_BOOL, TD_BOOL); + TD_ALIAS_(T_CHAR, TD_CHAR); + TD_ALIAS_(T_WCHAR, TD_WCHAR); + TD_ALIAS_(T_VOID, TD_VOID); + TD_ALIAS_(T_NSIDPTR, TD_NSIDPTR); + TD_ALIAS_(T_CHAR_STR, TD_PSTRING); + TD_ALIAS_(T_WCHAR_STR, TD_PWSTRING); + TD_ALIAS_(T_INTERFACE, TD_INTERFACE_TYPE); + TD_ALIAS_(T_INTERFACE_IS, TD_INTERFACE_IS_TYPE); + TD_ALIAS_(T_LEGACY_ARRAY, TD_LEGACY_ARRAY); + TD_ALIAS_(T_PSTRING_SIZE_IS, TD_PSTRING_SIZE_IS); + TD_ALIAS_(T_PWSTRING_SIZE_IS, TD_PWSTRING_SIZE_IS); + TD_ALIAS_(T_UTF8STRING, TD_UTF8STRING); + TD_ALIAS_(T_CSTRING, TD_CSTRING); + TD_ALIAS_(T_ASTRING, TD_ASTRING); + TD_ALIAS_(T_NSID, TD_NSID); + TD_ALIAS_(T_JSVAL, TD_JSVAL); + TD_ALIAS_(T_DOMOBJECT, TD_DOMOBJECT); + TD_ALIAS_(T_PROMISE, TD_PROMISE); + TD_ALIAS_(T_ARRAY, TD_ARRAY); +#undef TD_ALIAS_ + + //////////////////////////////////////////////////////////////// + // Ensure these fields are in the same order as xptcodegen.py // + //////////////////////////////////////////////////////////////// + + uint8_t mTag : 5; + + // Parameter bitflags are packed into the XPTTypeDescriptor to save space. + // When the TypeDescriptor is not in a parameter, these flags are ignored. + uint8_t mInParam : 1; + uint8_t mOutParam : 1; + uint8_t mOptionalParam : 1; + + // The data for the different variants is stored in these two data fields. + // These should only be accessed via the getter methods above, which will + // assert if the tag is invalid. + uint8_t mData1; + uint8_t mData2; +}; + +// The fields in nsXPTType were carefully ordered to minimize size. +static_assert(sizeof(nsXPTType) == 3, "wrong size"); + +/* + * A nsXPTParamInfo is used to describe either a single argument to a method or + * a method's result. It stores its flags in the type descriptor to save space. + */ +struct nsXPTParamInfo { + bool IsIn() const { return mType.mInParam; } + bool IsOut() const { return mType.mOutParam; } + bool IsOptional() const { return mType.mOptionalParam; } + bool IsShared() const { return false; } // XXX remove (backcompat) + + // Get the type of this parameter. + const nsXPTType& Type() const { return mType; } + const nsXPTType& GetType() const { + return Type(); + } // XXX remove (backcompat) + + // Whether this parameter is passed indirectly on the stack. All out/inout + // params are passed indirectly, and complex types are always passed + // indirectly. + bool IsIndirect() const { return IsOut() || Type().IsComplex(); } + + //////////////////////////////////////////////////////////////// + // Ensure these fields are in the same order as xptcodegen.py // + //////////////////////////////////////////////////////////////// + + nsXPTType mType; +}; + +// The fields in nsXPTParamInfo were carefully ordered to minimize size. +static_assert(sizeof(nsXPTParamInfo) == 3, "wrong size"); + +/* + * A nsXPTMethodInfo is used to describe a single interface method. + */ +struct nsXPTMethodInfo { + bool IsGetter() const { return mGetter; } + bool IsSetter() const { return mSetter; } + bool IsReflectable() const { return mReflectable; } + bool IsSymbol() const { return mIsSymbol; } + bool WantsOptArgc() const { return mOptArgc; } + bool WantsContext() const { return mContext; } + uint8_t ParamCount() const { return mNumParams; } + + const char* Name() const { + MOZ_ASSERT(!IsSymbol()); + return xpt::detail::GetString(mName); + } + const nsXPTParamInfo& Param(uint8_t aIndex) const { + MOZ_ASSERT(aIndex < mNumParams); + return xpt::detail::GetParam(mParams + aIndex); + } + + bool HasRetval() const { return mHasRetval; } + const nsXPTParamInfo* GetRetval() const { + return mHasRetval ? &Param(mNumParams - 1) : nullptr; + } + + // If this is an [implicit_jscontext] method, returns the index of the + // implicit JSContext* argument in the C++ method's argument list. + // Otherwise returns UINT8_MAX. + uint8_t IndexOfJSContext() const { + if (!WantsContext()) { + return UINT8_MAX; + } + if (IsGetter() || IsSetter()) { + // Getters/setters always have the context as first argument. + return 0; + } + // The context comes before the return value, if there is one. + MOZ_ASSERT_IF(HasRetval(), ParamCount() > 0); + return ParamCount() - uint8_t(HasRetval()); + } + + JS::SymbolCode GetSymbolCode() const { + MOZ_ASSERT(IsSymbol()); + return JS::SymbolCode(mName); + } + + JS::Symbol* GetSymbol(JSContext* aCx) const { + return JS::GetWellKnownSymbol(aCx, GetSymbolCode()); + } + + const char* SymbolDescription() const; + + const char* NameOrDescription() const { + if (IsSymbol()) { + return SymbolDescription(); + } + return Name(); + } + + bool GetId(JSContext* aCx, jsid& aId) const; + + ///////////////////////////////////////////// + // nsXPTMethodInfo backwards compatibility // + ///////////////////////////////////////////// + + const char* GetName() const { return Name(); } + + uint8_t GetParamCount() const { return ParamCount(); } + const nsXPTParamInfo& GetParam(uint8_t aIndex) const { return Param(aIndex); } + + //////////////////////////////////////////////////////////////// + // Ensure these fields are in the same order as xptcodegen.py // + //////////////////////////////////////////////////////////////// + + uint32_t mName; // Index into xpt::detail::sStrings. + uint16_t mParams; // Index into xpt::detail::sParams. + uint8_t mNumParams; + + uint8_t mGetter : 1; + uint8_t mSetter : 1; + uint8_t mReflectable : 1; + uint8_t mOptArgc : 1; + uint8_t mContext : 1; + uint8_t mHasRetval : 1; + uint8_t mIsSymbol : 1; +}; + +// The fields in nsXPTMethodInfo were carefully ordered to minimize size. +static_assert(sizeof(nsXPTMethodInfo) == 8, "wrong size"); + +// This number is chosen to be no larger than the maximum number of parameters +// any XPIDL-defined function needs; there is a static assert in the generated +// code from xptcodegen.py to verify that decision. It is therefore also the +// maximum number of stack allocated nsXPTCMiniVariant structures for argument +// passing purposes in PrepareAndDispatch implementations. +#if defined(MOZ_THUNDERBIRD) || defined(MOZ_SUITE) +# define PARAM_BUFFER_COUNT 18 +#else +# define PARAM_BUFFER_COUNT 14 +#endif + +/** + * A nsXPTConstantInfo is used to describe a single interface constant. + */ +struct nsXPTConstantInfo { + const char* Name() const { return xpt::detail::GetString(mName); } + + JS::Value JSValue() const { + if (mSigned || mValue <= uint32_t(INT32_MAX)) { + return JS::Int32Value(int32_t(mValue)); + } + return JS::DoubleValue(mValue); + } + + //////////////////////////////////////////////////////////////// + // Ensure these fields are in the same order as xptcodegen.py // + //////////////////////////////////////////////////////////////// + + uint32_t mName : 31; // Index into xpt::detail::mStrings. + + // Whether the value should be interpreted as a int32_t or uint32_t. + uint32_t mSigned : 1; + uint32_t mValue; // The value stored as a u32 +}; + +// The fields in nsXPTConstantInfo were carefully ordered to minimize size. +static_assert(sizeof(nsXPTConstantInfo) == 8, "wrong size"); + +/** + * Object representing the information required to wrap and unwrap DOMObjects. + * + * This object will not live in rodata as it contains relocations. + */ +struct nsXPTDOMObjectInfo { + nsresult Unwrap(JS::Handle<JS::Value> aHandle, void** aObj, + JSContext* aCx) const { + return mUnwrap(aHandle, aObj, aCx); + } + + bool Wrap(JSContext* aCx, void* aObj, + JS::MutableHandle<JS::Value> aHandle) const { + return mWrap(aCx, aObj, aHandle); + } + + void Cleanup(void* aObj) const { return mCleanup(aObj); } + + //////////////////////////////////////////////////////////////// + // Ensure these fields are in the same order as xptcodegen.py // + //////////////////////////////////////////////////////////////// + + nsresult (*mUnwrap)(JS::Handle<JS::Value> aHandle, void** aObj, + JSContext* aCx); + bool (*mWrap)(JSContext* aCx, void* aObj, + JS::MutableHandle<JS::Value> aHandle); + void (*mCleanup)(void* aObj); +}; + +namespace xpt { +namespace detail { + +// The UntypedTArray type allows low-level access from XPConnect to nsTArray +// internals without static knowledge of the array element type in question. +class UntypedTArray : public nsTArray_base<nsTArrayFallibleAllocator, + nsTArray_RelocateUsingMemutils> { + public: + void* Elements() const { return static_cast<void*>(Hdr() + 1); } + + // Changes the length and capacity to be at least large enough for aTo + // elements. + bool SetLength(const nsXPTType& aEltTy, uint32_t aTo) { + if (!EnsureCapacity<nsTArrayFallibleAllocator>(aTo, aEltTy.Stride())) { + return false; + } + + if (mHdr != EmptyHdr()) { + mHdr->mLength = aTo; + } + + return true; + } + + // Free backing memory for the nsTArray object. + void Clear() { + if (mHdr != EmptyHdr() && !UsesAutoArrayBuffer()) { + nsTArrayFallibleAllocator::Free(mHdr); + } + mHdr = EmptyHdr(); + } +}; + +////////////////////////////////////////////// +// Raw typelib data stored in const statics // +////////////////////////////////////////////// + +// XPIDL information +extern const nsXPTInterfaceInfo sInterfaces[]; +extern const nsXPTType sTypes[]; +extern const nsXPTParamInfo sParams[]; +extern const nsXPTMethodInfo sMethods[]; +extern const nsXPTConstantInfo sConsts[]; +extern const nsXPTDOMObjectInfo sDOMObjects[]; + +extern const char sStrings[]; + +////////////////////////////////////// +// Helper Methods for fetching data // +////////////////////////////////////// + +inline const nsXPTInterfaceInfo* GetInterface(uint16_t aIndex) { + if (aIndex > 0 && aIndex <= sInterfacesSize) { + return &sInterfaces[aIndex - 1]; // 1-based as 0 is a marker. + } + return nullptr; +} + +inline const nsXPTType& GetType(uint16_t aIndex) { return sTypes[aIndex]; } + +inline const nsXPTParamInfo& GetParam(uint16_t aIndex) { + return sParams[aIndex]; +} + +inline const nsXPTMethodInfo& GetMethod(uint16_t aIndex) { + return sMethods[aIndex]; +} + +inline const nsXPTConstantInfo& GetConstant(uint16_t aIndex) { + return sConsts[aIndex]; +} + +inline const nsXPTDOMObjectInfo& GetDOMObjectInfo(uint16_t aIndex) { + return sDOMObjects[aIndex]; +} + +inline const char* GetString(uint32_t aIndex) { return &sStrings[aIndex]; } + +} // namespace detail +} // namespace xpt + +#define XPT_FOR_EACH_ARITHMETIC_TYPE(MACRO) \ + MACRO(TD_INT8, int8_t) \ + MACRO(TD_INT16, int16_t) \ + MACRO(TD_INT32, int32_t) \ + MACRO(TD_INT64, int64_t) \ + MACRO(TD_UINT8, uint8_t) \ + MACRO(TD_UINT16, uint16_t) \ + MACRO(TD_UINT32, uint32_t) \ + MACRO(TD_UINT64, uint64_t) \ + MACRO(TD_FLOAT, float) \ + MACRO(TD_DOUBLE, double) \ + MACRO(TD_BOOL, bool) \ + MACRO(TD_CHAR, char) \ + MACRO(TD_WCHAR, char16_t) + +#define XPT_FOR_EACH_POINTER_TYPE(MACRO) \ + MACRO(TD_VOID, void*) \ + MACRO(TD_NSIDPTR, nsID*) \ + MACRO(TD_PSTRING, char*) \ + MACRO(TD_PWSTRING, wchar_t*) \ + MACRO(TD_INTERFACE_TYPE, nsISupports*) \ + MACRO(TD_INTERFACE_IS_TYPE, nsISupports*) \ + MACRO(TD_LEGACY_ARRAY, void*) \ + MACRO(TD_PSTRING_SIZE_IS, char*) \ + MACRO(TD_PWSTRING_SIZE_IS, wchar_t*) \ + MACRO(TD_DOMOBJECT, void*) \ + MACRO(TD_PROMISE, mozilla::dom::Promise*) + +#define XPT_FOR_EACH_COMPLEX_TYPE(MACRO) \ + MACRO(TD_UTF8STRING, nsCString) \ + MACRO(TD_CSTRING, nsCString) \ + MACRO(TD_ASTRING, nsString) \ + MACRO(TD_NSID, nsID) \ + MACRO(TD_JSVAL, JS::Value) \ + MACRO(TD_ARRAY, xpt::detail::UntypedTArray) + +#define XPT_FOR_EACH_TYPE(MACRO) \ + XPT_FOR_EACH_ARITHMETIC_TYPE(MACRO) \ + XPT_FOR_EACH_POINTER_TYPE(MACRO) \ + XPT_FOR_EACH_COMPLEX_TYPE(MACRO) + +inline size_t nsXPTType::Stride() const { + // Compute the stride to use when walking an array of the given type. + switch (Tag()) { +#define XPT_TYPE_STRIDE(tag, type) \ + case tag: \ + return sizeof(type); + XPT_FOR_EACH_TYPE(XPT_TYPE_STRIDE) +#undef XPT_TYPE_STRIDE + } + + MOZ_CRASH("Unknown type"); +} + +#endif /* xptinfo_h */ |