#include "pyconfig.h" /* include for defines */
/**************************************************************************
Symbols and macros to supply platform-independent interfaces to basic
C language & library operations whose spellings vary across platforms.
Please try to make documentation here as clear as possible: by definition,
the stuff here is trying to illuminate C's darkest corners.
Config #defines referenced here:
SIGNED_RIGHT_SHIFT_ZERO_FILLS
Meaning: To be defined iff i>>j does not extend the sign bit when i is a
signed integral type and i < 0.
Used in: Py_ARITHMETIC_RIGHT_SHIFT
Meaning: Extra checks compiled in for debug mode.
Used in: Py_SAFE_DOWNCAST
Meaning: The C9X type uintptr_t is supported by the compiler
Meaning: The compiler supports the C type "long long"
**************************************************************************/
/* For backward compatibility only. Obsolete, do not use. */
#define Py_FPROTO(x) Py_PROTO(x)
/* typedefs for some C9X-defined synonyms for integral types.
* The names in Python are exactly the same as the C9X names, except with a
* Py_ prefix. Until C9X is universally implemented, this is the only way
* to ensure that Python gets reliable names that don't conflict with names
* in non-Python code that are playing their own tricks to define the C9X
* NOTE: don't go nuts here! Python has no use for *most* of the C9X
* integral synonyms. Only define the ones we actually need.
#define PY_LONG_LONG long long
#endif /* HAVE_LONG_LONG */
/* uintptr_t is the C9X name for an unsigned integral type such that a
* legitimate void* can be cast to uintptr_t and then back to void* again
* without loss of information. Similarly for intptr_t, wrt a signed
typedef uintptr_t Py_uintptr_t
;
typedef intptr_t Py_intptr_t
;
#elif SIZEOF_VOID_P <= SIZEOF_INT
typedef unsigned int Py_uintptr_t
;
#elif SIZEOF_VOID_P <= SIZEOF_LONG
typedef unsigned long Py_uintptr_t
;
typedef long Py_intptr_t
;
#elif defined(HAVE_LONG_LONG) && (SIZEOF_VOID_P <= SIZEOF_LONG_LONG)
typedef unsigned PY_LONG_LONG Py_uintptr_t
;
typedef PY_LONG_LONG Py_intptr_t
;
# error "Python needs a typedef for Py_uintptr_t in pyport.h."
#endif /* HAVE_UINTPTR_T */
#include <math.h> /* Moved here from the math section, before extern "C" */
/********************************************
* WRAPPER FOR <time.h> and/or <sys/time.h> *
********************************************/
#ifdef TIME_WITH_SYS_TIME
#else /* !TIME_WITH_SYS_TIME */
#else /* !HAVE_SYS_TIME_H */
#endif /* !HAVE_SYS_TIME_H */
#endif /* !TIME_WITH_SYS_TIME */
/******************************
* WRAPPER FOR <sys/select.h> *
******************************/
/* NB caller must include <sys/types.h> */
#endif /* !HAVE_SYS_SELECT_H */
/*******************************
* stat() and fstat() fiddling *
*******************************/
/* We expect that stat and fstat exist on most systems.
* It's confirmed on Unix, Mac and Windows.
* If you don't have them, add
* #define DONT_HAVE_FSTAT
* to your pyconfig.h. Python code beyond this should check HAVE_STAT and
* #define DONT_HAVE_SYS_STAT_H
* if <sys/stat.h> doesn't exist on your platform, and
* if <stat.h> does (don't look at me -- ths mess is inherited).
#ifndef DONT_HAVE_SYS_STAT_H
#if defined(PYOS_OS2) && defined(PYCC_GCC)
#elif defined(HAVE_STAT_H)
/* VisualAge C/C++ Failed to Define MountType Field in sys/stat.h */
#define S_IFMT (S_IFDIR|S_IFCHR|S_IFREG)
#define S_ISREG(x) (((x) & S_IFMT) == S_IFREG)
#define S_ISDIR(x) (((x) & S_IFMT) == S_IFDIR)
/* Move this down here since some C++ #include's don't like to be included
/* Py_ARITHMETIC_RIGHT_SHIFT
* C doesn't define whether a right-shift of a signed integer sign-extends
* or zero-fills. Here a macro to force sign extension:
* Py_ARITHMETIC_RIGHT_SHIFT(TYPE, I, J)
* Return I >> J, forcing sign extension.
* I is of basic signed type TYPE (char, short, int, long, or long long).
* TYPE is one of char, short, int, long, or long long, although long long
* must not be used except on platforms that support it.
* J is an integer >= 0 and strictly less than the number of bits in TYPE
* (because C doesn't define what happens for J outside that range either).
* I may be evaluated more than once.
#ifdef SIGNED_RIGHT_SHIFT_ZERO_FILLS
#define Py_ARITHMETIC_RIGHT_SHIFT(TYPE, I, J) \
((I) < 0 ? ~((~(unsigned TYPE)(I)) >> (J)) : (I) >> (J))
#define Py_ARITHMETIC_RIGHT_SHIFT(TYPE, I, J) ((I) >> (J))
* "Simply" returns its argument. However, macro expansions within the
* argument are evaluated. This unfortunate trickery is needed to get
* token-pasting to work as desired in some cases.
#define Py_FORCE_EXPANSION(X) X
/* Py_SAFE_DOWNCAST(VALUE, WIDE, NARROW)
* Cast VALUE to type NARROW from type WIDE. In Py_DEBUG mode, this
* assert-fails if any information is lost.
* VALUE may be evaluated more than once.
#define Py_SAFE_DOWNCAST(VALUE, WIDE, NARROW) \
(assert((WIDE)(NARROW)(VALUE) == (VALUE)), (NARROW)(VALUE))
#define Py_SAFE_DOWNCAST(VALUE, WIDE, NARROW) (NARROW)(VALUE)
* Return 1 if float or double arg is a NaN, else 0.
* X is evaluated more than once.
* This may not work on all platforms. Each platform has *some*
* way to spell this, though -- override in pyconfig.h if you have
* a platform where it doesn't work.
#define Py_IS_NAN(X) ((X) != (X))
* Return 1 if float or double arg is an infinity, else 0.
* X is evaluated more than once.
* This implementation may set the underflow flag if |X| is very small;
* it really can't be implemented correctly (& easily) before C99.
* Override in pyconfig.h if you have a better spelling on your platform.
#define Py_IS_INFINITY(X) ((X) && (X)*0.5 == (X))
/* HUGE_VAL is supposed to expand to a positive double infinity. Python
* uses Py_HUGE_VAL instead because some platforms are broken in this
* respect. We used to embed code in pyport.h to try to worm around that,
* but different platforms are broken in conflicting ways. If you're on
* a platform where HUGE_VAL is defined incorrectly, fiddle your Python
* config to #define Py_HUGE_VAL to something that works on your platform.
#define Py_HUGE_VAL HUGE_VAL
* Return 1 iff a libm function overflowed. Set errno to 0 before calling
* a libm function, and invoke this macro after, passing the function
* This isn't reliable. C99 no longer requires libm to set errno under
* any exceptional condition, but does require +- HUGE_VAL return
* values on overflow. A 754 box *probably* maps HUGE_VAL to a
* double infinity, and we're cool if that's so, unless the input
* was an infinity and an infinity is the expected result. A C89
* system sets errno to ERANGE, so we check for that too. We're
* out of luck if a C99 754 box doesn't map HUGE_VAL to +Inf, or
* if the returned result is a NaN, or if a C89 box returns HUGE_VAL
* X is evaluated more than once.
* Some platforms have better way to spell this, so expect some #ifdef'ery.
* OpenBSD uses 'isinf()' because a compiler bug on that platform causes
* the longer macro version to be mis-compiled. This isn't optimal, and
* should be removed once a newer compiler is available on that platform.
* The system that had the failure was running OpenBSD 3.2 on Intel, with
* According to Tim's checkin, the FreeBSD systems use isinf() to work
* around a FPE bug on that platform.
#if defined(__FreeBSD__) || defined(__OpenBSD__)
#define Py_OVERFLOWED(X) isinf(X)
#define Py_OVERFLOWED(X) ((X) != 0.0 && (errno == ERANGE || \
/* Py_SET_ERRNO_ON_MATH_ERROR(x)
* If a libm function did not set errno, but it looks like the result
* overflowed or not-a-number, set errno to ERANGE or EDOM. Set errno
* to 0 before calling a libm function, and invoke this macro after,
* passing the function result.
* This isn't reliable. See Py_OVERFLOWED comments.
* X is evaluated more than once.
#if defined(__FreeBSD__) || defined(__OpenBSD__) || (defined(__hpux) && defined(__ia64))
#define _Py_SET_EDOM_FOR_NAN(X) if (isnan(X)) errno = EDOM;
#define _Py_SET_EDOM_FOR_NAN(X) ;
#define Py_SET_ERRNO_ON_MATH_ERROR(X) \
if ((X) == Py_HUGE_VAL || (X) == -Py_HUGE_VAL) \
else _Py_SET_EDOM_FOR_NAN(X) \
/* Py_SET_ERANGE_ON_OVERFLOW(x)
* An alias of Py_SET_ERRNO_ON_MATH_ERROR for backward-compatibility.
#define Py_SET_ERANGE_IF_OVERFLOW(X) Py_SET_ERRNO_ON_MATH_ERROR(X)
* Py_ADJUST_ERANGE2(x, y)
* Set errno to 0 before calling a libm function, and invoke one of these
* macros after, passing the function result(s) (Py_ADJUST_ERANGE2 is useful
* for functions returning complex results). This makes two kinds of
* adjustments to errno: (A) If it looks like the platform libm set
* errno=ERANGE due to underflow, clear errno. (B) If it looks like the
* platform libm overflowed but didn't set errno, force errno to ERANGE. In
* effect, we're trying to force a useful implementation of C89 errno
* This isn't reliable. See Py_OVERFLOWED comments.
* X and Y may be evaluated more than once.
#define Py_ADJUST_ERANGE1(X) \
if ((X) == Py_HUGE_VAL || (X) == -Py_HUGE_VAL) \
else if (errno == ERANGE && (X) == 0.0) \
#define Py_ADJUST_ERANGE2(X, Y) \
if ((X) == Py_HUGE_VAL || (X) == -Py_HUGE_VAL || \
(Y) == Py_HUGE_VAL || (Y) == -Py_HUGE_VAL) { \
else if (errno == ERANGE) \
/* Py_DEPRECATED(version)
* Declare a variable, type, or function deprecated.
* extern int old_var Py_DEPRECATED(2.3);
* typedef int T1 Py_DEPRECATED(2.4);
* extern int x() Py_DEPRECATED(2.5);
#if defined(__GNUC__) && (__GNUC__ == 3) && (__GNUC_MINOR__ >= 1)
#define Py_DEPRECATED(VERSION_UNUSED) __attribute__((__deprecated__))
#define Py_DEPRECATED(VERSION_UNUSED)
/**************************************************************************
Prototypes that are missing from the standard include files on some systems
(and possibly only some versions of such systems.)
Please be conservative with adding new ones, document them and enclose them
in platform-specific #ifdefs.
**************************************************************************/
extern int gethostname(char *, int);
/* It's in the libs, but not the headers... - [cjh] */
int shutdown( int, int );
#include <sys/types.h> /* we need to import mode_t */
extern char * _getpty(int *, int, mode_t
, int);
#if defined(HAVE_OPENPTY) || defined(HAVE_FORKPTY)
#if !defined(HAVE_PTY_H) && !defined(HAVE_LIBUTIL_H)
/* BSDI does not supply a prototype for the 'openpty' and 'forkpty'
functions, even though they are included in libutil. */
extern int openpty(int *, int *, char *, struct termios
*, struct winsize
*);
extern int forkpty(int *, char *, struct termios
*, struct winsize
*);
#endif /* !defined(HAVE_PTY_H) && !defined(HAVE_LIBUTIL_H) */
#endif /* defined(HAVE_OPENPTY) || defined(HAVE_FORKPTY) */
/* These are pulled from various places. It isn't obvious on what platforms
they are necessary, nor what the exact prototype should look like (which
is likely to vary between platforms!) If you find you need one of these
declarations, please move them to a platform-specific block and include
/* From Modules/resource.c */
extern int getpagesize();
/* From Python/sysmodule.c and Modules/posixmodule.c */
extern int fclose(FILE *);
/* From Modules/posixmodule.c */
extern int fdatasync(int);
/************************
************************/
extern double hypot(double, double);
/*******************************************************************
On 4.4BSD-descendants, ctype functions serves the whole range of
wchar_t character set rather than single byte code points only.
This characteristic can break some operations of string object
including str.upper() and str.split() on UTF-8 locales. This
workaround was provided by Tim Robbins of FreeBSD project. He said
the incompatibility will be fixed in FreeBSD 6.
********************************************************************/
#if __FreeBSD_version > 500039
#define isalnum(c) iswalnum(btowc(c))
#define isalpha(c) iswalpha(btowc(c))
#define islower(c) iswlower(btowc(c))
#define isspace(c) iswspace(btowc(c))
#define isupper(c) iswupper(btowc(c))
#define tolower(c) towlower(btowc(c))
#define toupper(c) towupper(btowc(c))
/* Declarations for symbol visibility.
PyAPI_FUNC(type): Declares a public Python API function and return type
PyAPI_DATA(type): Declares public Python data and its type
PyMODINIT_FUNC: A Python module init function. If these functions are
inside the Python core, they are private to the core.
If in an extension module, it may be declared with
external linkage depending on the platform.
As a number of platforms support/require "__declspec(dllimport/dllexport)",
we support a HAVE_DECLSPEC_DLL macro to save duplication.
All windows ports, except cygwin, are handled in PC/pyconfig.h.
BeOS and cygwin are the only other autoconf platform requiring special
linkage handling and both of these use __declspec().
#if defined(__CYGWIN__) || defined(__BEOS__)
# define HAVE_DECLSPEC_DLL
/* only get special linkage if built as shared or platform is Cygwin */
#if defined(Py_ENABLE_SHARED) || defined(__CYGWIN__)
# if defined(HAVE_DECLSPEC_DLL)
# define PyAPI_FUNC(RTYPE) __declspec(dllexport) RTYPE
# define PyAPI_DATA(RTYPE) extern __declspec(dllexport) RTYPE
/* module init functions inside the core need no external linkage */
/* except for Cygwin to handle embedding (FIXME: BeOS too?) */
# define PyMODINIT_FUNC __declspec(dllexport) void
# define PyMODINIT_FUNC void
# else /* Py_BUILD_CORE */
/* Building an extension module, or an embedded situation */
/* public Python functions and data are imported */
/* Under Cygwin, auto-import functions to prevent compilation */
/* failures similar to http://python.org/doc/FAQ.html#3.24 */
# if !defined(__CYGWIN__)
# define PyAPI_FUNC(RTYPE) __declspec(dllimport) RTYPE
# endif /* !__CYGWIN__ */
# define PyAPI_DATA(RTYPE) extern __declspec(dllimport) RTYPE
/* module init functions outside the core must be exported */
# if defined(__cplusplus)
# define PyMODINIT_FUNC extern "C" __declspec(dllexport) void
# define PyMODINIT_FUNC __declspec(dllexport) void
# endif /* __cplusplus */
# endif /* Py_BUILD_CORE */
# endif /* HAVE_DECLSPEC */
#endif /* Py_ENABLE_SHARED */
/* If no external linkage macros defined by now, create defaults */
# define PyAPI_FUNC(RTYPE) RTYPE
# define PyAPI_DATA(RTYPE) extern RTYPE
# if defined(__cplusplus)
# define PyMODINIT_FUNC extern "C" void
# define PyMODINIT_FUNC void
# endif /* __cplusplus */
/* Deprecated DL_IMPORT and DL_EXPORT macros */
#if defined(Py_ENABLE_SHARED) && defined (HAVE_DECLSPEC_DLL)
# if defined(Py_BUILD_CORE)
# define DL_IMPORT(RTYPE) __declspec(dllexport) RTYPE
# define DL_EXPORT(RTYPE) __declspec(dllexport) RTYPE
# define DL_IMPORT(RTYPE) __declspec(dllimport) RTYPE
# define DL_EXPORT(RTYPE) __declspec(dllexport) RTYPE
# define DL_EXPORT(RTYPE) RTYPE
# define DL_IMPORT(RTYPE) RTYPE
/* End of deprecated DL_* macros */
/* If the fd manipulation macros aren't defined,
here is a set that should do the job */
#if 0 /* disabled and probably obsolete */
#define NFDBITS (sizeof(fd_mask) * NBBY) /* bits per mask */
#define howmany(x, y) (((x)+((y)-1))/(y))
fd_mask fds_bits
[howmany(FD_SETSIZE
, NFDBITS
)];
#define FD_SET(n, p) ((p)->fds_bits[(n)/NFDBITS] |= (1 << ((n) % NFDBITS)))
#define FD_CLR(n, p) ((p)->fds_bits[(n)/NFDBITS] &= ~(1 << ((n) % NFDBITS)))
#define FD_ISSET(n, p) ((p)->fds_bits[(n)/NFDBITS] & (1 << ((n) % NFDBITS)))
#define FD_ZERO(p) memset((char *)(p), '\0', sizeof(*(p)))
#endif /* fd manipulation macros */
/* limits.h constants that may be missing */
#define INT_MAX 2147483647
#define LONG_MAX 0X7FFFFFFFL
#define LONG_MAX 0X7FFFFFFFFFFFFFFFL
#error "could not set LONG_MAX in pyport.h"
#define LONG_MIN (-LONG_MAX-1)
#define LONG_BIT (8 * SIZEOF_LONG)
#if LONG_BIT != 8 * SIZEOF_LONG
/* 04-Oct-2000 LONG_BIT is apparently (mis)defined as 64 on some recent
* 32-bit platforms using gcc. We try to catch that here at compile-time
* rather than waiting for integer multiplication to trigger bogus
#error "LONG_BIT definition appears wrong for platform (bad gcc/glibc config?)."
* Hide GCC attributes from compilers that don't support them.
#if (!defined(__GNUC__) || __GNUC__ < 2 || \
(__GNUC__ == 2 && __GNUC_MINOR__ < 7) ) && \
#define Py_GCC_ATTRIBUTE(x)
#define Py_GCC_ATTRIBUTE(x) __attribute__(x)
/* Eliminate end-of-loop code not reached warnings from SunPro C
* when using do{...}while(0) macros
#pragma error_messages (off,E_END_OF_LOOP_CODE_NOT_REACHED)