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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Mozilla Communicator client code, released
* March 31, 1998.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* IBM Corp.
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
/*
** File: jstypes.h
** Description: Definitions of NSPR's basic types
**
** Prototypes and macros used to make up for deficiencies in ANSI environments
** that we have found.
**
** Since we do not wrap <stdlib.h> and all the other standard headers, authors
** of portable code will not know in general that they need these definitions.
** Instead of requiring these authors to find the dependent uses in their code
** and take the following steps only in those C files, we take steps once here
** for all C files.
**/
#ifndef jstypes_h___
#define jstypes_h___
#include <stddef.h>
#include "js-config.h"
/***********************************************************************
** MACROS: JS_EXTERN_API
** JS_EXPORT_API
** DESCRIPTION:
** These are only for externally visible routines and globals. For
** internal routines, just use "extern" for type checking and that
** will not export internal cross-file or forward-declared symbols.
** Define a macro for declaring procedures return types. We use this to
** deal with windoze specific type hackery for DLL definitions. Use
** JS_EXTERN_API when the prototype for the method is declared. Use
** JS_EXPORT_API for the implementation of the method.
**
** Example:
** in dowhim.h
** JS_EXTERN_API( void ) DoWhatIMean( void );
** in dowhim.c
** JS_EXPORT_API( void ) DoWhatIMean( void ) { return; }
**
**
***********************************************************************/
#ifdef WIN32
/* These also work for __MWERKS__ */
# define JS_EXTERN_API(__type) extern __declspec(dllexport) __type
# define JS_EXPORT_API(__type) __declspec(dllexport) __type
# define JS_EXTERN_DATA(__type) extern __declspec(dllexport) __type
# define JS_EXPORT_DATA(__type) __declspec(dllexport) __type
#elif defined(XP_OS2) && defined(__declspec)
# define JS_EXTERN_API(__type) extern __declspec(dllexport) __type
# define JS_EXPORT_API(__type) __declspec(dllexport) __type
# define JS_EXTERN_DATA(__type) extern __declspec(dllexport) __type
# define JS_EXPORT_DATA(__type) __declspec(dllexport) __type
#elif defined(__SYMBIAN32__)
# define JS_EXTERN_API(__type) extern EXPORT_C __type
# define JS_EXPORT_API(__type) EXPORT_C __type
# define JS_EXTERN_DATA(__type) extern EXPORT_C __type
# define JS_EXPORT_DATA(__type) EXPORT_C __type
#else /* Unix */
# ifdef HAVE_VISIBILITY_ATTRIBUTE
# define JS_EXTERNAL_VIS __attribute__((visibility ("default")))
# elif defined(__SUNPRO_C) || defined(__SUNPRO_CC)
# define JS_EXTERNAL_VIS __global
# else
# define JS_EXTERNAL_VIS
# endif
# define JS_EXTERN_API(__type) extern JS_EXTERNAL_VIS __type
# define JS_EXPORT_API(__type) JS_EXTERNAL_VIS __type
# define JS_EXTERN_DATA(__type) extern JS_EXTERNAL_VIS __type
# define JS_EXPORT_DATA(__type) JS_EXTERNAL_VIS __type
#endif
#ifdef _WIN32
# if defined(__MWERKS__) || defined(__GNUC__)
# define JS_IMPORT_API(__x) __x
# else
# define JS_IMPORT_API(__x) __declspec(dllimport) __x
# endif
#elif defined(XP_OS2) && defined(__declspec)
# define JS_IMPORT_API(__x) __declspec(dllimport) __x
#elif defined(__SYMBIAN32__)
# define JS_IMPORT_API(__x) IMPORT_C __x
#else
# define JS_IMPORT_API(__x) JS_EXPORT_API (__x)
#endif
#if defined(_WIN32) && !defined(__MWERKS__)
# define JS_IMPORT_DATA(__x) __declspec(dllimport) __x
#elif defined(XP_OS2) && defined(__declspec)
# define JS_IMPORT_DATA(__x) __declspec(dllimport) __x
#elif defined(__SYMBIAN32__)
# if defined(__CW32__)
# define JS_IMPORT_DATA(__x) __declspec(dllimport) __x
# else
# define JS_IMPORT_DATA(__x) IMPORT_C __x
# endif
#else
# define JS_IMPORT_DATA(__x) JS_EXPORT_DATA (__x)
#endif
/*
* The linkage of JS API functions differs depending on whether the file is
* used within the JS library or not. Any source file within the JS
* interpreter should define EXPORT_JS_API whereas any client of the library
* should not. STATIC_JS_API is used to build JS as a static library.
*/
#if defined(STATIC_JS_API)
# define JS_PUBLIC_API(t) t
# define JS_PUBLIC_DATA(t) t
#elif defined(EXPORT_JS_API)
# define JS_PUBLIC_API(t) JS_EXPORT_API(t)
# define JS_PUBLIC_DATA(t) JS_EXPORT_DATA(t)
#else
# define JS_PUBLIC_API(t) JS_IMPORT_API(t)
# define JS_PUBLIC_DATA(t) JS_IMPORT_DATA(t)
#endif
#define JS_FRIEND_API(t) JS_PUBLIC_API(t)
#define JS_FRIEND_DATA(t) JS_PUBLIC_DATA(t)
#if defined(_MSC_VER) && defined(_M_IX86)
#define JS_FASTCALL __fastcall
#elif defined(__GNUC__) && defined(__i386__) && \
((__GNUC__ >= 4) || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4))
#define JS_FASTCALL __attribute__((fastcall))
#else
#define JS_FASTCALL
#define JS_NO_FASTCALL
#endif
#ifndef JS_INLINE
# if defined __cplusplus
# define JS_INLINE inline
# elif defined _MSC_VER
# define JS_INLINE __inline
# elif defined __GNUC__
# define JS_INLINE __inline__
# else
# define JS_INLINE inline
# endif
#endif
#ifndef JS_ALWAYS_INLINE
# if defined DEBUG
# define JS_ALWAYS_INLINE JS_INLINE
# elif defined _MSC_VER
# define JS_ALWAYS_INLINE __forceinline
# elif defined __GNUC__
# define JS_ALWAYS_INLINE __attribute__((always_inline)) JS_INLINE
# else
# define JS_ALWAYS_INLINE JS_INLINE
# endif
#endif
#ifdef NS_STATIC_CHECKING
/*
* Attributes for static analysis. Functions declared with JS_REQUIRES_STACK
* always have a valid cx->fp and can access it freely. Other functions can
* access cx->fp only after calling a function that "forces" the stack
* (i.e. lazily instantiates it as needed).
*/
# define JS_REQUIRES_STACK __attribute__((user("JS_REQUIRES_STACK")))
# define JS_FORCES_STACK __attribute__((user("JS_FORCES_STACK")))
/*
* Skip the JS_REQUIRES_STACK analysis within functions with this annotation.
*/
# define JS_IGNORE_STACK __attribute__((user("JS_IGNORE_STACK")))
#else
# define JS_REQUIRES_STACK
# define JS_FORCES_STACK
# define JS_IGNORE_STACK
#endif
/***********************************************************************
** MACROS: JS_BEGIN_MACRO
** JS_END_MACRO
** DESCRIPTION:
** Macro body brackets so that macros with compound statement definitions
** behave syntactically more like functions when called.
***********************************************************************/
#define JS_BEGIN_MACRO do {
#if defined(_MSC_VER) && _MSC_VER >= 1400
# define JS_END_MACRO \
} __pragma(warning(push)) __pragma(warning(disable:4127)) \
while (0) __pragma(warning(pop))
#else
# define JS_END_MACRO } while (0)
#endif
/***********************************************************************
** MACROS: JS_BEGIN_EXTERN_C
** JS_END_EXTERN_C
** DESCRIPTION:
** Macro shorthands for conditional C++ extern block delimiters.
***********************************************************************/
#ifdef __cplusplus
# define JS_BEGIN_EXTERN_C extern "C" {
# define JS_END_EXTERN_C }
#else
# define JS_BEGIN_EXTERN_C
# define JS_END_EXTERN_C
#endif
/***********************************************************************
** MACROS: JS_BIT
** JS_BITMASK
** DESCRIPTION:
** Bit masking macros. XXX n must be <= 31 to be portable
***********************************************************************/
#define JS_BIT(n) ((JSUint32)1 << (n))
#define JS_BITMASK(n) (JS_BIT(n) - 1)
/***********************************************************************
** MACROS: JS_PTR_TO_INT32
** JS_PTR_TO_UINT32
** JS_INT32_TO_PTR
** JS_UINT32_TO_PTR
** DESCRIPTION:
** Integer to pointer and pointer to integer conversion macros.
***********************************************************************/
#define JS_PTR_TO_INT32(x) ((jsint)((char *)(x) - (char *)0))
#define JS_PTR_TO_UINT32(x) ((jsuint)((char *)(x) - (char *)0))
#define JS_INT32_TO_PTR(x) ((void *)((char *)0 + (jsint)(x)))
#define JS_UINT32_TO_PTR(x) ((void *)((char *)0 + (jsuint)(x)))
/***********************************************************************
** MACROS: JS_HOWMANY
** JS_ROUNDUP
** JS_MIN
** JS_MAX
** DESCRIPTION:
** Commonly used macros for operations on compatible types.
***********************************************************************/
#define JS_HOWMANY(x,y) (((x)+(y)-1)/(y))
#define JS_ROUNDUP(x,y) (JS_HOWMANY(x,y)*(y))
#define JS_MIN(x,y) ((x)<(y)?(x):(y))
#define JS_MAX(x,y) ((x)>(y)?(x):(y))
#ifdef _MSC_VER
# include "jscpucfg.h" /* We can't auto-detect MSVC configuration */
# if _MSC_VER < 1400
# define NJ_NO_VARIADIC_MACROS
# endif
#else
# include "jsautocfg.h" /* Use auto-detected configuration */
#endif
#include "jsinttypes.h"
JS_BEGIN_EXTERN_C
/************************************************************************
** TYPES: JSUintn
** JSIntn
** DESCRIPTION:
** The JSIntn types are most appropriate for automatic variables. They are
** guaranteed to be at least 16 bits, though various architectures may
** define them to be wider (e.g., 32 or even 64 bits). These types are
** never valid for fields of a structure.
************************************************************************/
typedef int JSIntn;
typedef unsigned int JSUintn;
/************************************************************************
** TYPES: JSFloat64
** DESCRIPTION:
** NSPR's floating point type is always 64 bits.
************************************************************************/
typedef double JSFloat64;
/************************************************************************
** TYPES: JSSize
** DESCRIPTION:
** A type for representing the size of objects.
************************************************************************/
typedef size_t JSSize;
/************************************************************************
** TYPES: JSPtrDiff
** DESCRIPTION:
** A type for pointer difference. Variables of this type are suitable
** for storing a pointer or pointer sutraction.
************************************************************************/
typedef ptrdiff_t JSPtrdiff;
/************************************************************************
** TYPES: JSUptrdiff
** DESCRIPTION:
** A type for pointer difference. Variables of this type are suitable
** for storing a pointer or pointer sutraction.
************************************************************************/
typedef JSUintPtr JSUptrdiff;
/************************************************************************
** TYPES: JSBool
** DESCRIPTION:
** Use JSBool for variables and parameter types. Use JS_FALSE and JS_TRUE
** for clarity of target type in assignments and actual arguments. Use
** 'if (bool)', 'while (!bool)', '(bool) ? x : y' etc., to test booleans
** just as you would C int-valued conditions.
************************************************************************/
typedef JSIntn JSBool;
#define JS_TRUE (JSIntn)1
#define JS_FALSE (JSIntn)0
/************************************************************************
** TYPES: JSPackedBool
** DESCRIPTION:
** Use JSPackedBool within structs where bitfields are not desireable
** but minimum and consistent overhead matters.
************************************************************************/
typedef JSUint8 JSPackedBool;
/*
** A JSWord is an integer that is the same size as a void*
*/
typedef JSIntPtr JSWord;
typedef JSUintPtr JSUword;
#include "jsotypes.h"
/***********************************************************************
** MACROS: JS_LIKELY
** JS_UNLIKELY
** DESCRIPTION:
** These macros allow you to give a hint to the compiler about branch
** probability so that it can better optimize. Use them like this:
**
** if (JS_LIKELY(v == 1)) {
** ... expected code path ...
** }
**
** if (JS_UNLIKELY(v == 0)) {
** ... non-expected code path ...
** }
**
***********************************************************************/
#if defined(__GNUC__) && (__GNUC__ > 2)
# define JS_LIKELY(x) (__builtin_expect((x), 1))
# define JS_UNLIKELY(x) (__builtin_expect((x), 0))
#else
# define JS_LIKELY(x) (x)
# define JS_UNLIKELY(x) (x)
#endif
/***********************************************************************
** MACROS: JS_ARRAY_LENGTH
** JS_ARRAY_END
** DESCRIPTION:
** Macros to get the number of elements and the pointer to one past the
** last element of a C array. Use them like this:
**
** jschar buf[10], *s;
** JSString *str;
** ...
** for (s = buf; s != JS_ARRAY_END(buf); ++s) *s = ...;
** ...
** str = JS_NewStringCopyN(cx, buf, JS_ARRAY_LENGTH(buf));
** ...
**
***********************************************************************/
#define JS_ARRAY_LENGTH(array) (sizeof (array) / sizeof (array)[0])
#define JS_ARRAY_END(array) ((array) + JS_ARRAY_LENGTH(array))
#define JS_BITS_PER_BYTE 8
#define JS_BITS_PER_BYTE_LOG2 3
#define JS_BITS_PER_WORD (JS_BITS_PER_BYTE * JS_BYTES_PER_WORD)
#define JS_BITS_PER_DOUBLE (JS_BITS_PER_BYTE * JS_BYTES_PER_DOUBLE)
/***********************************************************************
** MACROS: JS_FUNC_TO_DATA_PTR
** JS_DATA_TO_FUNC_PTR
** DESCRIPTION:
** Macros to convert between function and data pointers assuming that
** they have the same size. Use them like this:
**
** JSPropertyOp nativeGetter;
** JSObject *scriptedGetter;
** ...
** scriptedGetter = JS_FUNC_TO_DATA_PTR(JSObject *, nativeGetter);
** ...
** nativeGetter = JS_DATA_TO_FUNC_PTR(JSPropertyOp, scriptedGetter);
**
***********************************************************************/
#ifdef __GNUC__
# define JS_FUNC_TO_DATA_PTR(type, fun) (__extension__ (type) (fun))
# define JS_DATA_TO_FUNC_PTR(type, ptr) (__extension__ (type) (ptr))
#else
/* Use an extra (void *) cast for MSVC. */
# define JS_FUNC_TO_DATA_PTR(type, fun) ((type) (void *) (fun))
# define JS_DATA_TO_FUNC_PTR(type, ptr) ((type) (void *) (ptr))
#endif
#ifdef __GNUC__
# define JS_EXTENSION __extension__
# define JS_EXTENSION_(s) __extension__ ({ s; })
#else
# define JS_EXTENSION
# define JS_EXTENSION_(s) s
#endif
JS_END_EXTERN_C
#endif /* jstypes_h___ */
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