4 #include "pyconfig.h" /* include for defines */
10 /**************************************************************************
11 Symbols and macros to supply platform-independent interfaces to basic
12 C language & library operations whose spellings vary across platforms.
14 Please try to make documentation here as clear as possible: by definition,
15 the stuff here is trying to illuminate C's darkest corners.
17 Config #defines referenced here:
19 SIGNED_RIGHT_SHIFT_ZERO_FILLS
20 Meaning: To be defined iff i>>j does not extend the sign bit when i is a
21 signed integral type and i < 0.
22 Used in: Py_ARITHMETIC_RIGHT_SHIFT
25 Meaning: Extra checks compiled in for debug mode.
26 Used in: Py_SAFE_DOWNCAST
29 Meaning: The C9X type uintptr_t is supported by the compiler
33 Meaning: The compiler supports the C type "long long"
36 **************************************************************************/
39 /* For backward compatibility only. Obsolete, do not use. */
40 #ifdef HAVE_PROTOTYPES
43 #define Py_PROTO(x) ()
46 #define Py_FPROTO(x) Py_PROTO(x)
49 /* typedefs for some C9X-defined synonyms for integral types.
51 * The names in Python are exactly the same as the C9X names, except with a
52 * Py_ prefix. Until C9X is universally implemented, this is the only way
53 * to ensure that Python gets reliable names that don't conflict with names
54 * in non-Python code that are playing their own tricks to define the C9X
57 * NOTE: don't go nuts here! Python has no use for *most* of the C9X
58 * integral synonyms. Only define the ones we actually need.
63 #define PY_LONG_LONG long long
64 #if defined(LLONG_MAX)
65 /* If LLONG_MAX is defined in limits.h, use that. */
66 #define PY_LLONG_MIN LLONG_MIN
67 #define PY_LLONG_MAX LLONG_MAX
68 #define PY_ULLONG_MAX ULLONG_MAX
69 #elif defined(__LONG_LONG_MAX__)
70 /* Otherwise, if GCC has a builtin define, use that. */
71 #define PY_LLONG_MAX __LONG_LONG_MAX__
72 #define PY_LLONG_MIN (-PY_LLONG_MAX-1)
73 #define PY_ULLONG_MAX (__LONG_LONG_MAX__*2ULL + 1ULL)
75 /* Otherwise, rely on two's complement. */
76 #define PY_ULLONG_MAX (~0ULL)
77 #define PY_LLONG_MAX ((long long)(PY_ULLONG_MAX>>1))
78 #define PY_LLONG_MIN (-PY_LLONG_MAX-1)
79 #endif /* LLONG_MAX */
81 #endif /* HAVE_LONG_LONG */
83 /* uintptr_t is the C9X name for an unsigned integral type such that a
84 * legitimate void* can be cast to uintptr_t and then back to void* again
85 * without loss of information. Similarly for intptr_t, wrt a signed
89 typedef uintptr_t Py_uintptr_t
;
90 typedef intptr_t Py_intptr_t
;
92 #elif SIZEOF_VOID_P <= SIZEOF_INT
93 typedef unsigned int Py_uintptr_t
;
94 typedef int Py_intptr_t
;
96 #elif SIZEOF_VOID_P <= SIZEOF_LONG
97 typedef unsigned long Py_uintptr_t
;
98 typedef long Py_intptr_t
;
100 #elif defined(HAVE_LONG_LONG) && (SIZEOF_VOID_P <= SIZEOF_LONG_LONG)
101 typedef unsigned PY_LONG_LONG Py_uintptr_t
;
102 typedef PY_LONG_LONG Py_intptr_t
;
105 # error "Python needs a typedef for Py_uintptr_t in pyport.h."
106 #endif /* HAVE_UINTPTR_T */
108 /* Py_ssize_t is a signed integral type such that sizeof(Py_ssize_t) ==
109 * sizeof(size_t). C99 doesn't define such a thing directly (size_t is an
110 * unsigned integral type). See PEP 353 for details.
113 typedef ssize_t Py_ssize_t
;
114 #elif SIZEOF_VOID_P == SIZEOF_SIZE_T
115 typedef Py_intptr_t Py_ssize_t
;
117 # error "Python needs a typedef for Py_ssize_t in pyport.h."
120 /* Largest positive value of type Py_ssize_t. */
121 #define PY_SSIZE_T_MAX ((Py_ssize_t)(((size_t)-1)>>1))
122 /* Smallest negative value of type Py_ssize_t. */
123 #define PY_SSIZE_T_MIN (-PY_SSIZE_T_MAX-1)
125 #if SIZEOF_PID_T > SIZEOF_LONG
126 # error "Python doesn't support sizeof(pid_t) > sizeof(long)"
129 /* PY_FORMAT_SIZE_T is a platform-specific modifier for use in a printf
130 * format to convert an argument with the width of a size_t or Py_ssize_t.
131 * C99 introduced "z" for this purpose, but not all platforms support that;
132 * e.g., MS compilers use "I" instead.
134 * These "high level" Python format functions interpret "z" correctly on
135 * all platforms (Python interprets the format string itself, and does whatever
136 * the platform C requires to convert a size_t/Py_ssize_t argument):
138 * PyString_FromFormat
140 * PyString_FromFormatV
142 * Lower-level uses require that you interpolate the correct format modifier
143 * yourself (e.g., calling printf, fprintf, sprintf, PyOS_snprintf); for
147 * fprintf(stderr, "index %" PY_FORMAT_SIZE_T "d sucks\n", index);
149 * That will expand to %ld, or %Id, or to something else correct for a
150 * Py_ssize_t on the platform.
152 #ifndef PY_FORMAT_SIZE_T
153 # if SIZEOF_SIZE_T == SIZEOF_INT && !defined(__APPLE__)
154 # define PY_FORMAT_SIZE_T ""
155 # elif SIZEOF_SIZE_T == SIZEOF_LONG
156 # define PY_FORMAT_SIZE_T "l"
157 # elif defined(MS_WINDOWS)
158 # define PY_FORMAT_SIZE_T "I"
160 # error "This platform's pyconfig.h needs to define PY_FORMAT_SIZE_T"
164 /* Py_LOCAL can be used instead of static to get the fastest possible calling
165 * convention for functions that are local to a given module.
167 * Py_LOCAL_INLINE does the same thing, and also explicitly requests inlining,
168 * for platforms that support that.
170 * If PY_LOCAL_AGGRESSIVE is defined before python.h is included, more
171 * "aggressive" inlining/optimizaion is enabled for the entire module. This
172 * may lead to code bloat, and may slow things down for those reasons. It may
173 * also lead to errors, if the code relies on pointer aliasing. Use with
176 * NOTE: You can only use this for functions that are entirely local to a
177 * module; functions that are exported via method tables, callbacks, etc,
178 * should keep using static.
181 #undef USE_INLINE /* XXX - set via configure? */
183 #if defined(_MSC_VER)
184 #if defined(PY_LOCAL_AGGRESSIVE)
185 /* enable more aggressive optimization for visual studio */
186 #pragma optimize("agtw", on)
188 /* ignore warnings if the compiler decides not to inline a function */
189 #pragma warning(disable: 4710)
190 /* fastest possible local call under MSVC */
191 #define Py_LOCAL(type) static type __fastcall
192 #define Py_LOCAL_INLINE(type) static __inline type __fastcall
193 #elif defined(USE_INLINE)
194 #define Py_LOCAL(type) static type
195 #define Py_LOCAL_INLINE(type) static inline type
197 #define Py_LOCAL(type) static type
198 #define Py_LOCAL_INLINE(type) static type
201 /* Py_MEMCPY can be used instead of memcpy in cases where the copied blocks
202 * are often very short. While most platforms have highly optimized code for
203 * large transfers, the setup costs for memcpy are often quite high. MEMCPY
204 * solves this by doing short copies "in line".
207 #if defined(_MSC_VER)
208 #define Py_MEMCPY(target, source, length) do { \
209 size_t i_, n_ = (length); \
210 char *t_ = (void*) (target); \
211 const char *s_ = (void*) (source); \
213 memcpy(t_, s_, n_); \
215 for (i_ = 0; i_ < n_; i_++) \
219 #define Py_MEMCPY memcpy
224 #include <math.h> /* Moved here from the math section, before extern "C" */
226 /********************************************
227 * WRAPPER FOR <time.h> and/or <sys/time.h> *
228 ********************************************/
230 #ifdef TIME_WITH_SYS_TIME
231 #include <sys/time.h>
233 #else /* !TIME_WITH_SYS_TIME */
234 #ifdef HAVE_SYS_TIME_H
235 #include <sys/time.h>
236 #else /* !HAVE_SYS_TIME_H */
238 #endif /* !HAVE_SYS_TIME_H */
239 #endif /* !TIME_WITH_SYS_TIME */
242 /******************************
243 * WRAPPER FOR <sys/select.h> *
244 ******************************/
246 /* NB caller must include <sys/types.h> */
248 #ifdef HAVE_SYS_SELECT_H
250 #include <sys/select.h>
252 #endif /* !HAVE_SYS_SELECT_H */
254 /*******************************
255 * stat() and fstat() fiddling *
256 *******************************/
258 /* We expect that stat and fstat exist on most systems.
259 * It's confirmed on Unix, Mac and Windows.
260 * If you don't have them, add
261 * #define DONT_HAVE_STAT
263 * #define DONT_HAVE_FSTAT
264 * to your pyconfig.h. Python code beyond this should check HAVE_STAT and
265 * HAVE_FSTAT instead.
267 * #define HAVE_SYS_STAT_H
268 * if <sys/stat.h> exists on your platform, and
269 * #define HAVE_STAT_H
272 #ifndef DONT_HAVE_STAT
276 #ifndef DONT_HAVE_FSTAT
281 #include <sys/types.h>
282 #include "unixstuff.h"
285 #ifdef HAVE_SYS_STAT_H
286 #if defined(PYOS_OS2) && defined(PYCC_GCC)
287 #include <sys/types.h>
289 #include <sys/stat.h>
290 #elif defined(HAVE_STAT_H)
294 #if defined(PYCC_VACPP)
295 /* VisualAge C/C++ Failed to Define MountType Field in sys/stat.h */
296 #define S_IFMT (S_IFDIR|S_IFCHR|S_IFREG)
300 #define S_ISREG(x) (((x) & S_IFMT) == S_IFREG)
304 #define S_ISDIR(x) (((x) & S_IFMT) == S_IFDIR)
309 /* Move this down here since some C++ #include's don't like to be included
310 inside an extern "C" */
315 /* Py_ARITHMETIC_RIGHT_SHIFT
316 * C doesn't define whether a right-shift of a signed integer sign-extends
317 * or zero-fills. Here a macro to force sign extension:
318 * Py_ARITHMETIC_RIGHT_SHIFT(TYPE, I, J)
319 * Return I >> J, forcing sign extension.
321 * I is of basic signed type TYPE (char, short, int, long, or long long).
322 * TYPE is one of char, short, int, long, or long long, although long long
323 * must not be used except on platforms that support it.
324 * J is an integer >= 0 and strictly less than the number of bits in TYPE
325 * (because C doesn't define what happens for J outside that range either).
327 * I may be evaluated more than once.
329 #ifdef SIGNED_RIGHT_SHIFT_ZERO_FILLS
330 #define Py_ARITHMETIC_RIGHT_SHIFT(TYPE, I, J) \
331 ((I) < 0 ? ~((~(unsigned TYPE)(I)) >> (J)) : (I) >> (J))
333 #define Py_ARITHMETIC_RIGHT_SHIFT(TYPE, I, J) ((I) >> (J))
336 /* Py_FORCE_EXPANSION(X)
337 * "Simply" returns its argument. However, macro expansions within the
338 * argument are evaluated. This unfortunate trickery is needed to get
339 * token-pasting to work as desired in some cases.
341 #define Py_FORCE_EXPANSION(X) X
343 /* Py_SAFE_DOWNCAST(VALUE, WIDE, NARROW)
344 * Cast VALUE to type NARROW from type WIDE. In Py_DEBUG mode, this
345 * assert-fails if any information is lost.
347 * VALUE may be evaluated more than once.
350 #define Py_SAFE_DOWNCAST(VALUE, WIDE, NARROW) \
351 (assert((WIDE)(NARROW)(VALUE) == (VALUE)), (NARROW)(VALUE))
353 #define Py_SAFE_DOWNCAST(VALUE, WIDE, NARROW) (NARROW)(VALUE)
356 /* High precision defintion of pi and e (Euler)
357 * The values are taken from libc6's math.h.
360 #define Py_MATH_PIl 3.1415926535897932384626433832795029L
363 #define Py_MATH_PI 3.14159265358979323846
367 #define Py_MATH_El 2.7182818284590452353602874713526625L
371 #define Py_MATH_E 2.7182818284590452354
375 * Return 1 if float or double arg is a NaN, else 0.
377 * X is evaluated more than once.
378 * This may not work on all platforms. Each platform has *some*
379 * way to spell this, though -- override in pyconfig.h if you have
380 * a platform where it doesn't work.
384 #define Py_IS_NAN(X) isnan(X)
386 #define Py_IS_NAN(X) ((X) != (X))
391 * Return 1 if float or double arg is an infinity, else 0.
393 * X is evaluated more than once.
394 * This implementation may set the underflow flag if |X| is very small;
395 * it really can't be implemented correctly (& easily) before C99.
396 * Override in pyconfig.h if you have a better spelling on your platform.
398 #ifndef Py_IS_INFINITY
400 #define Py_IS_INFINITY(X) isinf(X)
402 #define Py_IS_INFINITY(X) ((X) && (X)*0.5 == (X))
407 * Return 1 if float or double arg is neither infinite nor NAN, else 0.
408 * Some compilers (e.g. VisualStudio) have intrisics for this, so a special
409 * macro for this particular test is useful
413 #define Py_IS_FINITE(X) finite(X)
415 #define Py_IS_FINITE(X) (!Py_IS_INFINITY(X) && !Py_IS_NAN(X))
419 /* HUGE_VAL is supposed to expand to a positive double infinity. Python
420 * uses Py_HUGE_VAL instead because some platforms are broken in this
421 * respect. We used to embed code in pyport.h to try to worm around that,
422 * but different platforms are broken in conflicting ways. If you're on
423 * a platform where HUGE_VAL is defined incorrectly, fiddle your Python
424 * config to #define Py_HUGE_VAL to something that works on your platform.
427 #define Py_HUGE_VAL HUGE_VAL
431 * A value that evaluates to a NaN. On IEEE 754 platforms INF*0 or
432 * INF/INF works. Define Py_NO_NAN in pyconfig.h if your platform
433 * doesn't support NaNs.
435 #if !defined(Py_NAN) && !defined(Py_NO_NAN)
436 #define Py_NAN (Py_HUGE_VAL * 0.)
440 * Return 1 iff a libm function overflowed. Set errno to 0 before calling
441 * a libm function, and invoke this macro after, passing the function
444 * This isn't reliable. C99 no longer requires libm to set errno under
445 * any exceptional condition, but does require +- HUGE_VAL return
446 * values on overflow. A 754 box *probably* maps HUGE_VAL to a
447 * double infinity, and we're cool if that's so, unless the input
448 * was an infinity and an infinity is the expected result. A C89
449 * system sets errno to ERANGE, so we check for that too. We're
450 * out of luck if a C99 754 box doesn't map HUGE_VAL to +Inf, or
451 * if the returned result is a NaN, or if a C89 box returns HUGE_VAL
452 * in non-overflow cases.
453 * X is evaluated more than once.
454 * Some platforms have better way to spell this, so expect some #ifdef'ery.
456 * OpenBSD uses 'isinf()' because a compiler bug on that platform causes
457 * the longer macro version to be mis-compiled. This isn't optimal, and
458 * should be removed once a newer compiler is available on that platform.
459 * The system that had the failure was running OpenBSD 3.2 on Intel, with
462 * According to Tim's checkin, the FreeBSD systems use isinf() to work
463 * around a FPE bug on that platform.
465 #if defined(__FreeBSD__) || defined(__OpenBSD__)
466 #define Py_OVERFLOWED(X) isinf(X)
468 #define Py_OVERFLOWED(X) ((X) != 0.0 && (errno == ERANGE || \
469 (X) == Py_HUGE_VAL || \
470 (X) == -Py_HUGE_VAL))
473 /* Py_SET_ERRNO_ON_MATH_ERROR(x)
474 * If a libm function did not set errno, but it looks like the result
475 * overflowed or not-a-number, set errno to ERANGE or EDOM. Set errno
476 * to 0 before calling a libm function, and invoke this macro after,
477 * passing the function result.
479 * This isn't reliable. See Py_OVERFLOWED comments.
480 * X is evaluated more than once.
482 #if defined(__FreeBSD__) || defined(__OpenBSD__) || (defined(__hpux) && defined(__ia64))
483 #define _Py_SET_EDOM_FOR_NAN(X) if (isnan(X)) errno = EDOM;
485 #define _Py_SET_EDOM_FOR_NAN(X) ;
487 #define Py_SET_ERRNO_ON_MATH_ERROR(X) \
490 if ((X) == Py_HUGE_VAL || (X) == -Py_HUGE_VAL) \
492 else _Py_SET_EDOM_FOR_NAN(X) \
496 /* Py_SET_ERANGE_ON_OVERFLOW(x)
497 * An alias of Py_SET_ERRNO_ON_MATH_ERROR for backward-compatibility.
499 #define Py_SET_ERANGE_IF_OVERFLOW(X) Py_SET_ERRNO_ON_MATH_ERROR(X)
501 /* Py_ADJUST_ERANGE1(x)
502 * Py_ADJUST_ERANGE2(x, y)
503 * Set errno to 0 before calling a libm function, and invoke one of these
504 * macros after, passing the function result(s) (Py_ADJUST_ERANGE2 is useful
505 * for functions returning complex results). This makes two kinds of
506 * adjustments to errno: (A) If it looks like the platform libm set
507 * errno=ERANGE due to underflow, clear errno. (B) If it looks like the
508 * platform libm overflowed but didn't set errno, force errno to ERANGE. In
509 * effect, we're trying to force a useful implementation of C89 errno
512 * This isn't reliable. See Py_OVERFLOWED comments.
513 * X and Y may be evaluated more than once.
515 #define Py_ADJUST_ERANGE1(X) \
518 if ((X) == Py_HUGE_VAL || (X) == -Py_HUGE_VAL) \
521 else if (errno == ERANGE && (X) == 0.0) \
525 #define Py_ADJUST_ERANGE2(X, Y) \
527 if ((X) == Py_HUGE_VAL || (X) == -Py_HUGE_VAL || \
528 (Y) == Py_HUGE_VAL || (Y) == -Py_HUGE_VAL) { \
532 else if (errno == ERANGE) \
536 /* Py_DEPRECATED(version)
537 * Declare a variable, type, or function deprecated.
539 * extern int old_var Py_DEPRECATED(2.3);
540 * typedef int T1 Py_DEPRECATED(2.4);
541 * extern int x() Py_DEPRECATED(2.5);
543 #if defined(__GNUC__) && ((__GNUC__ >= 4) || \
544 (__GNUC__ == 3) && (__GNUC_MINOR__ >= 1))
545 #define Py_DEPRECATED(VERSION_UNUSED) __attribute__((__deprecated__))
547 #define Py_DEPRECATED(VERSION_UNUSED)
550 /**************************************************************************
551 Prototypes that are missing from the standard include files on some systems
552 (and possibly only some versions of such systems.)
554 Please be conservative with adding new ones, document them and enclose them
555 in platform-specific #ifdefs.
556 **************************************************************************/
560 extern int gethostname(char *, int);
565 /* It's in the libs, but not the headers... - [cjh] */
566 int shutdown( int, int );
570 #include <sys/types.h> /* we need to import mode_t */
571 extern char * _getpty(int *, int, mode_t
, int);
574 #if defined(HAVE_OPENPTY) || defined(HAVE_FORKPTY)
575 #if !defined(HAVE_PTY_H) && !defined(HAVE_LIBUTIL_H)
576 /* BSDI does not supply a prototype for the 'openpty' and 'forkpty'
577 functions, even though they are included in libutil. */
579 extern int openpty(int *, int *, char *, struct termios
*, struct winsize
*);
580 extern pid_t
forkpty(int *, char *, struct termios
*, struct winsize
*);
581 #endif /* !defined(HAVE_PTY_H) && !defined(HAVE_LIBUTIL_H) */
582 #endif /* defined(HAVE_OPENPTY) || defined(HAVE_FORKPTY) */
585 /* These are pulled from various places. It isn't obvious on what platforms
586 they are necessary, nor what the exact prototype should look like (which
587 is likely to vary between platforms!) If you find you need one of these
588 declarations, please move them to a platform-specific block and include
589 proper prototypes. */
592 /* From Modules/resource.c */
593 extern int getrusage();
594 extern int getpagesize();
596 /* From Python/sysmodule.c and Modules/posixmodule.c */
597 extern int fclose(FILE *);
599 /* From Modules/posixmodule.c */
600 extern int fdatasync(int);
604 /************************
605 * WRAPPER FOR <math.h> *
606 ************************/
609 extern double hypot(double, double);
613 /* On 4.4BSD-descendants, ctype functions serves the whole range of
614 * wchar_t character set rather than single byte code points only.
615 * This characteristic can break some operations of string object
616 * including str.upper() and str.split() on UTF-8 locales. This
617 * workaround was provided by Tim Robbins of FreeBSD project.
621 #include <osreldate.h>
622 #if __FreeBSD_version > 500039
626 #define isalnum(c) iswalnum(btowc(c))
628 #define isalpha(c) iswalpha(btowc(c))
630 #define islower(c) iswlower(btowc(c))
632 #define isspace(c) iswspace(btowc(c))
634 #define isupper(c) iswupper(btowc(c))
636 #define tolower(c) towlower(btowc(c))
638 #define toupper(c) towupper(btowc(c))
643 /* Declarations for symbol visibility.
645 PyAPI_FUNC(type): Declares a public Python API function and return type
646 PyAPI_DATA(type): Declares public Python data and its type
647 PyMODINIT_FUNC: A Python module init function. If these functions are
648 inside the Python core, they are private to the core.
649 If in an extension module, it may be declared with
650 external linkage depending on the platform.
652 As a number of platforms support/require "__declspec(dllimport/dllexport)",
653 we support a HAVE_DECLSPEC_DLL macro to save duplication.
657 All windows ports, except cygwin, are handled in PC/pyconfig.h.
659 BeOS and cygwin are the only other autoconf platform requiring special
660 linkage handling and both of these use __declspec().
662 #if defined(__CYGWIN__) || defined(__BEOS__)
663 # define HAVE_DECLSPEC_DLL
666 /* only get special linkage if built as shared or platform is Cygwin */
667 #if defined(Py_ENABLE_SHARED) || defined(__CYGWIN__)
668 # if defined(HAVE_DECLSPEC_DLL)
669 # ifdef Py_BUILD_CORE
670 # define PyAPI_FUNC(RTYPE) __declspec(dllexport) RTYPE
671 # define PyAPI_DATA(RTYPE) extern __declspec(dllexport) RTYPE
672 /* module init functions inside the core need no external linkage */
673 /* except for Cygwin to handle embedding (FIXME: BeOS too?) */
674 # if defined(__CYGWIN__)
675 # define PyMODINIT_FUNC __declspec(dllexport) void
676 # else /* __CYGWIN__ */
677 # define PyMODINIT_FUNC void
678 # endif /* __CYGWIN__ */
679 # else /* Py_BUILD_CORE */
680 /* Building an extension module, or an embedded situation */
681 /* public Python functions and data are imported */
682 /* Under Cygwin, auto-import functions to prevent compilation */
683 /* failures similar to http://python.org/doc/FAQ.html#3.24 */
684 # if !defined(__CYGWIN__)
685 # define PyAPI_FUNC(RTYPE) __declspec(dllimport) RTYPE
686 # endif /* !__CYGWIN__ */
687 # define PyAPI_DATA(RTYPE) extern __declspec(dllimport) RTYPE
688 /* module init functions outside the core must be exported */
689 # if defined(__cplusplus)
690 # define PyMODINIT_FUNC extern "C" __declspec(dllexport) void
691 # else /* __cplusplus */
692 # define PyMODINIT_FUNC __declspec(dllexport) void
693 # endif /* __cplusplus */
694 # endif /* Py_BUILD_CORE */
695 # endif /* HAVE_DECLSPEC */
696 #endif /* Py_ENABLE_SHARED */
698 /* If no external linkage macros defined by now, create defaults */
700 # define PyAPI_FUNC(RTYPE) RTYPE
703 # define PyAPI_DATA(RTYPE) extern RTYPE
705 #ifndef PyMODINIT_FUNC
706 # if defined(__cplusplus)
707 # define PyMODINIT_FUNC extern "C" void
708 # else /* __cplusplus */
709 # define PyMODINIT_FUNC void
710 # endif /* __cplusplus */
713 /* Deprecated DL_IMPORT and DL_EXPORT macros */
714 #if defined(Py_ENABLE_SHARED) && defined (HAVE_DECLSPEC_DLL)
715 # if defined(Py_BUILD_CORE)
716 # define DL_IMPORT(RTYPE) __declspec(dllexport) RTYPE
717 # define DL_EXPORT(RTYPE) __declspec(dllexport) RTYPE
719 # define DL_IMPORT(RTYPE) __declspec(dllimport) RTYPE
720 # define DL_EXPORT(RTYPE) __declspec(dllexport) RTYPE
724 # define DL_EXPORT(RTYPE) RTYPE
727 # define DL_IMPORT(RTYPE) RTYPE
729 /* End of deprecated DL_* macros */
731 /* If the fd manipulation macros aren't defined,
732 here is a set that should do the job */
734 #if 0 /* disabled and probably obsolete */
737 #define FD_SETSIZE 256
742 typedef long fd_mask
;
744 #define NFDBITS (sizeof(fd_mask) * NBBY) /* bits per mask */
746 #define howmany(x, y) (((x)+((y)-1))/(y))
749 typedef struct fd_set
{
750 fd_mask fds_bits
[howmany(FD_SETSIZE
, NFDBITS
)];
753 #define FD_SET(n, p) ((p)->fds_bits[(n)/NFDBITS] |= (1 << ((n) % NFDBITS)))
754 #define FD_CLR(n, p) ((p)->fds_bits[(n)/NFDBITS] &= ~(1 << ((n) % NFDBITS)))
755 #define FD_ISSET(n, p) ((p)->fds_bits[(n)/NFDBITS] & (1 << ((n) % NFDBITS)))
756 #define FD_ZERO(p) memset((char *)(p), '\0', sizeof(*(p)))
760 #endif /* fd manipulation macros */
763 /* limits.h constants that may be missing */
766 #define INT_MAX 2147483647
771 #define LONG_MAX 0X7FFFFFFFL
772 #elif SIZEOF_LONG == 8
773 #define LONG_MAX 0X7FFFFFFFFFFFFFFFL
775 #error "could not set LONG_MAX in pyport.h"
780 #define LONG_MIN (-LONG_MAX-1)
784 #define LONG_BIT (8 * SIZEOF_LONG)
787 #if LONG_BIT != 8 * SIZEOF_LONG
788 /* 04-Oct-2000 LONG_BIT is apparently (mis)defined as 64 on some recent
789 * 32-bit platforms using gcc. We try to catch that here at compile-time
790 * rather than waiting for integer multiplication to trigger bogus
793 #error "LONG_BIT definition appears wrong for platform (bad gcc/glibc config?)."
801 * Hide GCC attributes from compilers that don't support them.
803 #if (!defined(__GNUC__) || __GNUC__ < 2 || \
804 (__GNUC__ == 2 && __GNUC_MINOR__ < 7) ) && \
806 #define Py_GCC_ATTRIBUTE(x)
808 #define Py_GCC_ATTRIBUTE(x) __attribute__(x)
812 * Add PyArg_ParseTuple format where available.
814 #ifdef HAVE_ATTRIBUTE_FORMAT_PARSETUPLE
815 #define Py_FORMAT_PARSETUPLE(func,p1,p2) __attribute__((format(func,p1,p2)))
817 #define Py_FORMAT_PARSETUPLE(func,p1,p2)
820 /* Eliminate end-of-loop code not reached warnings from SunPro C
821 * when using do{...}while(0) macros
824 #pragma error_messages (off,E_END_OF_LOOP_CODE_NOT_REACHED)
828 * Older Microsoft compilers don't support the C99 long long literal suffixes,
829 * so these will be defined in PC/pyconfig.h for those compilers.
832 #define Py_LL(x) x##LL
836 #define Py_ULL(x) Py_LL(x##U)
839 #endif /* Py_PYPORT_H */