Repository URL to install this package:
#ifndef Py_PYPORT_H
#define Py_PYPORT_H
#include "pyconfig.h" /* include for defines */
#include <inttypes.h>
/* Defines to build Python and its standard library:
*
* - Py_BUILD_CORE: Build Python core. Give access to Python internals, but
* should not be used by third-party modules.
* - Py_BUILD_CORE_BUILTIN: Build a Python stdlib module as a built-in module.
* - Py_BUILD_CORE_MODULE: Build a Python stdlib module as a dynamic library.
*
* Py_BUILD_CORE_BUILTIN and Py_BUILD_CORE_MODULE imply Py_BUILD_CORE.
*
* On Windows, Py_BUILD_CORE_MODULE exports "PyInit_xxx" symbol, whereas
* Py_BUILD_CORE_BUILTIN does not.
*/
#if defined(Py_BUILD_CORE_BUILTIN) && !defined(Py_BUILD_CORE)
# define Py_BUILD_CORE
#endif
#if defined(Py_BUILD_CORE_MODULE) && !defined(Py_BUILD_CORE)
# define Py_BUILD_CORE
#endif
/**************************************************************************
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
Py_DEBUG
Meaning: Extra checks compiled in for debug mode.
Used in: Py_SAFE_DOWNCAST
**************************************************************************/
/* 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
* names.
*
* NOTE: don't go nuts here! Python has no use for *most* of the C9X
* integral synonyms. Only define the ones we actually need.
*/
/* long long is required. Ensure HAVE_LONG_LONG is defined for compatibility. */
#ifndef HAVE_LONG_LONG
#define HAVE_LONG_LONG 1
#endif
#ifndef PY_LONG_LONG
#define PY_LONG_LONG long long
/* If LLONG_MAX is defined in limits.h, use that. */
#define PY_LLONG_MIN LLONG_MIN
#define PY_LLONG_MAX LLONG_MAX
#define PY_ULLONG_MAX ULLONG_MAX
#endif
#define PY_UINT32_T uint32_t
#define PY_UINT64_T uint64_t
/* Signed variants of the above */
#define PY_INT32_T int32_t
#define PY_INT64_T int64_t
/* If PYLONG_BITS_IN_DIGIT is not defined then we'll use 30-bit digits if all
the necessary integer types are available, and we're on a 64-bit platform
(as determined by SIZEOF_VOID_P); otherwise we use 15-bit digits. */
#ifndef PYLONG_BITS_IN_DIGIT
#if SIZEOF_VOID_P >= 8
#define PYLONG_BITS_IN_DIGIT 30
#else
#define PYLONG_BITS_IN_DIGIT 15
#endif
#endif
/* 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
* integral type.
*/
typedef uintptr_t Py_uintptr_t;
typedef intptr_t Py_intptr_t;
/* Py_ssize_t is a signed integral type such that sizeof(Py_ssize_t) ==
* sizeof(size_t). C99 doesn't define such a thing directly (size_t is an
* unsigned integral type). See PEP 353 for details.
*/
#ifdef HAVE_SSIZE_T
typedef ssize_t Py_ssize_t;
#elif SIZEOF_VOID_P == SIZEOF_SIZE_T
typedef Py_intptr_t Py_ssize_t;
#else
# error "Python needs a typedef for Py_ssize_t in pyport.h."
#endif
/* Py_hash_t is the same size as a pointer. */
#define SIZEOF_PY_HASH_T SIZEOF_SIZE_T
typedef Py_ssize_t Py_hash_t;
/* Py_uhash_t is the unsigned equivalent needed to calculate numeric hash. */
#define SIZEOF_PY_UHASH_T SIZEOF_SIZE_T
typedef size_t Py_uhash_t;
/* Only used for compatibility with code that may not be PY_SSIZE_T_CLEAN. */
#ifdef PY_SSIZE_T_CLEAN
typedef Py_ssize_t Py_ssize_clean_t;
#else
typedef int Py_ssize_clean_t;
#endif
/* Largest possible value of size_t. */
#define PY_SIZE_MAX SIZE_MAX
/* Largest positive value of type Py_ssize_t. */
#define PY_SSIZE_T_MAX ((Py_ssize_t)(((size_t)-1)>>1))
/* Smallest negative value of type Py_ssize_t. */
#define PY_SSIZE_T_MIN (-PY_SSIZE_T_MAX-1)
/* PY_FORMAT_SIZE_T is a platform-specific modifier for use in a printf
* format to convert an argument with the width of a size_t or Py_ssize_t.
* C99 introduced "z" for this purpose, but not all platforms support that;
* e.g., MS compilers use "I" instead.
*
* These "high level" Python format functions interpret "z" correctly on
* all platforms (Python interprets the format string itself, and does whatever
* the platform C requires to convert a size_t/Py_ssize_t argument):
*
* PyBytes_FromFormat
* PyErr_Format
* PyBytes_FromFormatV
* PyUnicode_FromFormatV
*
* Lower-level uses require that you interpolate the correct format modifier
* yourself (e.g., calling printf, fprintf, sprintf, PyOS_snprintf); for
* example,
*
* Py_ssize_t index;
* fprintf(stderr, "index %" PY_FORMAT_SIZE_T "d sucks\n", index);
*
* That will expand to %ld, or %Id, or to something else correct for a
* Py_ssize_t on the platform.
*/
#ifndef PY_FORMAT_SIZE_T
# if SIZEOF_SIZE_T == SIZEOF_INT && !defined(__APPLE__)
# define PY_FORMAT_SIZE_T ""
# elif SIZEOF_SIZE_T == SIZEOF_LONG
# define PY_FORMAT_SIZE_T "l"
# elif defined(MS_WINDOWS)
# define PY_FORMAT_SIZE_T "I"
# else
# error "This platform's pyconfig.h needs to define PY_FORMAT_SIZE_T"
# endif
#endif
/* Py_LOCAL can be used instead of static to get the fastest possible calling
* convention for functions that are local to a given module.
*
* Py_LOCAL_INLINE does the same thing, and also explicitly requests inlining,
* for platforms that support that.
*
* If PY_LOCAL_AGGRESSIVE is defined before python.h is included, more
* "aggressive" inlining/optimization is enabled for the entire module. This
* may lead to code bloat, and may slow things down for those reasons. It may
* also lead to errors, if the code relies on pointer aliasing. Use with
* care.
*
* NOTE: You can only use this for functions that are entirely local to a
* module; functions that are exported via method tables, callbacks, etc,
* should keep using static.
*/
#if defined(_MSC_VER)
# if defined(PY_LOCAL_AGGRESSIVE)
/* enable more aggressive optimization for visual studio */
# pragma optimize("agtw", on)
#endif
/* ignore warnings if the compiler decides not to inline a function */
# pragma warning(disable: 4710)
/* fastest possible local call under MSVC */
# define Py_LOCAL(type) static type __fastcall
# define Py_LOCAL_INLINE(type) static __inline type __fastcall
#else
# define Py_LOCAL(type) static type
# define Py_LOCAL_INLINE(type) static inline type
#endif
/* Py_MEMCPY is kept for backwards compatibility,
* see https://bugs.python.org/issue28126 */
#define Py_MEMCPY memcpy
#include <stdlib.h>
#ifdef HAVE_IEEEFP_H
#include <ieeefp.h> /* needed for 'finite' declaration on some platforms */
#endif
#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
#include <sys/time.h>
#include <time.h>
#else /* !TIME_WITH_SYS_TIME */
#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#else /* !HAVE_SYS_TIME_H */
#include <time.h>
#endif /* !HAVE_SYS_TIME_H */
#endif /* !TIME_WITH_SYS_TIME */
/******************************
* WRAPPER FOR <sys/select.h> *
******************************/
/* NB caller must include <sys/types.h> */
#ifdef HAVE_SYS_SELECT_H
#include <sys/select.h>
#endif /* !HAVE_SYS_SELECT_H */
/*******************************
* stat() and fstat() fiddling *
*******************************/
#ifdef HAVE_SYS_STAT_H
#include <sys/stat.h>
#elif defined(HAVE_STAT_H)
#include <stat.h>
#endif
#ifndef S_IFMT
/* VisualAge C/C++ Failed to Define MountType Field in sys/stat.h */
#define S_IFMT 0170000
#endif
#ifndef S_IFLNK
/* Windows doesn't define S_IFLNK but posixmodule.c maps
* IO_REPARSE_TAG_SYMLINK to S_IFLNK */
# define S_IFLNK 0120000
#endif
#ifndef S_ISREG
#define S_ISREG(x) (((x) & S_IFMT) == S_IFREG)
#endif
#ifndef S_ISDIR
#define S_ISDIR(x) (((x) & S_IFMT) == S_IFDIR)
#endif
#ifndef S_ISCHR
#define S_ISCHR(x) (((x) & S_IFMT) == S_IFCHR)
#endif
#ifdef __cplusplus
/* Move this down here since some C++ #include's don't like to be included
inside an extern "C" */
extern "C" {
#endif
/* 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. Arithmetically, return the
* floor of I/2**J.
* Requirements:
* I should have signed integer type. In the terminology of C99, this can
* be either one of the five standard signed integer types (signed char,
* short, int, long, long long) or an extended signed integer type.
* J is an integer >= 0 and strictly less than the number of bits in the
* type of I (because C doesn't define what happens for J outside that
* range either).
* TYPE used to specify the type of I, but is now ignored. It's been left
* in for backwards compatibility with versions <= 2.6 or 3.0.
* Caution:
* I may be evaluated more than once.
*/
#ifdef SIGNED_RIGHT_SHIFT_ZERO_FILLS
#define Py_ARITHMETIC_RIGHT_SHIFT(TYPE, I, J) \
((I) < 0 ? -1-((-1-(I)) >> (J)) : (I) >> (J))
#else
#define Py_ARITHMETIC_RIGHT_SHIFT(TYPE, I, J) ((I) >> (J))
#endif
/* Py_FORCE_EXPANSION(X)
* "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.
* Caution:
* VALUE may be evaluated more than once.
*/
#ifdef Py_DEBUG
#define Py_SAFE_DOWNCAST(VALUE, WIDE, NARROW) \
(assert((WIDE)(NARROW)(VALUE) == (VALUE)), (NARROW)(VALUE))
#else
#define Py_SAFE_DOWNCAST(VALUE, WIDE, NARROW) (NARROW)(VALUE)
#endif
/* 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.
* Caution:
* 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;
#else
#define _Py_SET_EDOM_FOR_NAN(X) ;
#endif
#define Py_SET_ERRNO_ON_MATH_ERROR(X) \
do { \
if (errno == 0) { \
if ((X) == Py_HUGE_VAL || (X) == -Py_HUGE_VAL) \
errno = ERANGE; \
else _Py_SET_EDOM_FOR_NAN(X) \
} \
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