mirror of
https://github.com/classilla/tenfourfox.git
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222 lines
7.5 KiB
C
222 lines
7.5 KiB
C
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/* -*- 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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/*
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** File: jstypes.h
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** Description: Definitions of NSPR's basic types
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**
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** Prototypes and macros used to make up for deficiencies in ANSI environments
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** that we have found.
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**
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** Since we do not wrap <stdlib.h> and all the other standard headers, authors
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** of portable code will not know in general that they need these definitions.
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** Instead of requiring these authors to find the dependent uses in their code
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** and take the following steps only in those C files, we take steps once here
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** for all C files.
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**/
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#ifndef jstypes_h
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#define jstypes_h
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#include "mozilla/Attributes.h"
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#include "mozilla/Casting.h"
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#include "mozilla/Types.h"
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// jstypes.h is (or should be!) included by every file in SpiderMonkey.
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// js-config.h and jsversion.h also should be included by every file.
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// So include them here.
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// XXX: including them in js/RequiredDefines.h should be a better option, since
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// that is by definition the header file that should be included in all
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// SpiderMonkey code. However, Gecko doesn't do this! See bug 909576.
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#include "js-config.h"
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#include "jsversion.h"
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/***********************************************************************
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** MACROS: JS_EXTERN_API
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** JS_EXPORT_API
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** DESCRIPTION:
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** These are only for externally visible routines and globals. For
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** internal routines, just use "extern" for type checking and that
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** will not export internal cross-file or forward-declared symbols.
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** Define a macro for declaring procedures return types. We use this to
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** deal with windoze specific type hackery for DLL definitions. Use
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** JS_EXTERN_API when the prototype for the method is declared. Use
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** JS_EXPORT_API for the implementation of the method.
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**
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** Example:
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** in dowhim.h
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** JS_EXTERN_API( void ) DoWhatIMean( void );
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** in dowhim.c
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** JS_EXPORT_API( void ) DoWhatIMean( void ) { return; }
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**
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**
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***********************************************************************/
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#define JS_EXTERN_API(type) extern MOZ_EXPORT type
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#define JS_EXPORT_API(type) MOZ_EXPORT type
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#define JS_EXPORT_DATA(type) MOZ_EXPORT type
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#define JS_IMPORT_API(type) MOZ_IMPORT_API type
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#define JS_IMPORT_DATA(type) MOZ_IMPORT_DATA type
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/*
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* The linkage of JS API functions differs depending on whether the file is
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* used within the JS library or not. Any source file within the JS
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* interpreter should define EXPORT_JS_API whereas any client of the library
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* should not. STATIC_JS_API is used to build JS as a static library.
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*/
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#if defined(STATIC_JS_API)
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# define JS_PUBLIC_API(t) t
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# define JS_PUBLIC_DATA(t) t
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#elif defined(EXPORT_JS_API) || defined(STATIC_EXPORTABLE_JS_API)
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# define JS_PUBLIC_API(t) MOZ_EXPORT t
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# define JS_PUBLIC_DATA(t) MOZ_EXPORT t
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#else
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# define JS_PUBLIC_API(t) MOZ_IMPORT_API t
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# define JS_PUBLIC_DATA(t) MOZ_IMPORT_DATA t
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#endif
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#if defined(STATIC_JS_API) || defined(EXPORT_JS_API) || defined(STATIC_EXPORTABLE_JS_API)
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# define JS_FRIEND_API(t) MOZ_EXPORT t
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# define JS_FRIEND_DATA(t) MOZ_EXPORT t
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#else
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# define JS_FRIEND_API(t) MOZ_IMPORT_API t
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# define JS_FRIEND_DATA(t) MOZ_IMPORT_DATA t
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#endif
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#if defined(_MSC_VER) && defined(_M_IX86)
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#define JS_FASTCALL __fastcall
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#elif defined(__GNUC__) && defined(__i386__)
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#define JS_FASTCALL __attribute__((fastcall))
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#else
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#define JS_FASTCALL
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#define JS_NO_FASTCALL
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#endif
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/***********************************************************************
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** MACROS: JS_BEGIN_MACRO
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** JS_END_MACRO
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** DESCRIPTION:
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** Macro body brackets so that macros with compound statement definitions
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** behave syntactically more like functions when called.
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***********************************************************************/
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#define JS_BEGIN_MACRO do {
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#if defined(_MSC_VER)
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# define JS_END_MACRO \
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} __pragma(warning(push)) __pragma(warning(disable:4127)) \
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while (0) __pragma(warning(pop))
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#else
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# define JS_END_MACRO } while (0)
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#endif
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/***********************************************************************
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** MACROS: JS_BIT
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** JS_BITMASK
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** DESCRIPTION:
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** Bit masking macros. XXX n must be <= 31 to be portable
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***********************************************************************/
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#define JS_BIT(n) ((uint32_t)1 << (n))
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#define JS_BITMASK(n) (JS_BIT(n) - 1)
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/***********************************************************************
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** MACROS: JS_HOWMANY
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** JS_ROUNDUP
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** DESCRIPTION:
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** Commonly used macros for operations on compatible types.
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***********************************************************************/
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#define JS_HOWMANY(x,y) (((x)+(y)-1)/(y))
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#define JS_ROUNDUP(x,y) (JS_HOWMANY(x,y)*(y))
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#include "jscpucfg.h"
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/*
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* Define JS_64BIT iff we are building in an environment with 64-bit
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* addresses.
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*/
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#ifdef _MSC_VER
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# if defined(_M_X64) || defined(_M_AMD64)
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# define JS_64BIT
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# endif
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#elif defined(__GNUC__)
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/* Additional GCC defines are when running on Solaris, AIX, and HPUX */
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# if defined(__x86_64__) || defined(__sparcv9) || \
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defined(__64BIT__) || defined(__LP64__)
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# define JS_64BIT
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# endif
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#elif defined(__SUNPRO_C) || defined(__SUNPRO_CC) /* Sun Studio C/C++ */
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# if defined(__x86_64) || defined(__sparcv9)
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# define JS_64BIT
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# endif
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#elif defined(__xlc__) || defined(__xlC__) /* IBM XL C/C++ */
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# if defined(__64BIT__)
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# define JS_64BIT
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# endif
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#elif defined(__HP_cc) || defined(__HP_aCC) /* HP-UX cc/aCC */
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# if defined(__LP64__)
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# define JS_64BIT
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# endif
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#else
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# error "Implement me"
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#endif
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/***********************************************************************
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** MACROS: JS_ARRAY_LENGTH
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** JS_ARRAY_END
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** DESCRIPTION:
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** Macros to get the number of elements and the pointer to one past the
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** last element of a C array. Use them like this:
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**
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** char16_t buf[10];
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** JSString* str;
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** ...
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** for (char16_t* s = buf; s != JS_ARRAY_END(buf); ++s) *s = ...;
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** ...
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** str = JS_NewStringCopyN(cx, buf, JS_ARRAY_LENGTH(buf));
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** ...
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**
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***********************************************************************/
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#define JS_ARRAY_LENGTH(array) (sizeof (array) / sizeof (array)[0])
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#define JS_ARRAY_END(array) ((array) + JS_ARRAY_LENGTH(array))
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#define JS_BITS_PER_BYTE 8
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#define JS_BITS_PER_BYTE_LOG2 3
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#if defined(JS_64BIT)
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# define JS_BITS_PER_WORD 64
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#else
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# define JS_BITS_PER_WORD 32
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#endif
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/***********************************************************************
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** MACROS: JS_FUNC_TO_DATA_PTR
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** JS_DATA_TO_FUNC_PTR
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** DESCRIPTION:
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** Macros to convert between function and data pointers of the same
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** size. Use them like this:
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**
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** JSGetterOp nativeGetter;
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** JSObject* scriptedGetter;
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** ...
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** scriptedGetter = JS_FUNC_TO_DATA_PTR(JSObject*, nativeGetter);
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** ...
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** nativeGetter = JS_DATA_TO_FUNC_PTR(JSGetterOp, scriptedGetter);
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**
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***********************************************************************/
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#define JS_FUNC_TO_DATA_PTR(type, fun) (mozilla::BitwiseCast<type>(fun))
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#define JS_DATA_TO_FUNC_PTR(type, ptr) (mozilla::BitwiseCast<type>(ptr))
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#ifdef __GNUC__
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# define JS_EXTENSION __extension__
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# define JS_EXTENSION_(s) __extension__ ({ s; })
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#else
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# define JS_EXTENSION
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# define JS_EXTENSION_(s) s
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#endif
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#endif /* jstypes_h */
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