Include/pyport.h

   1 #ifndef Py_PYPORT_H
   2 #define Py_PYPORT_H
   3
   4 #include "pyconfig.h" /* include for defines */
   5
   6 /**************************************************************************
   7 Symbols and macros to supply platform-independent interfaces to basic
   8 C language & library operations whose spellings vary across platforms.
   9
  10 Please try to make documentation here as clear as possible:  by definition,
  11 the stuff here is trying to illuminate C's darkest corners.
  12
  13 Config #defines referenced here:
  14
  15 SIGNED_RIGHT_SHIFT_ZERO_FILLS
  16 Meaning:  To be defined iff i>>j does not extend the sign bit when i is a
  17           signed integral type and i < 0.
  18 Used in:  Py_ARITHMETIC_RIGHT_SHIFT
  19
  20 Py_DEBUG
  21 Meaning:  Extra checks compiled in for debug mode.
  22 Used in:  Py_SAFE_DOWNCAST
  23
  24 HAVE_UINTPTR_T
  25 Meaning:  The C9X type uintptr_t is supported by the compiler
  26 Used in:  Py_uintptr_t
  27
  28 HAVE_LONG_LONG
  29 Meaning:  The compiler supports the C type "long long"
  30 Used in:  PY_LONG_LONG
  31
  32 **************************************************************************/
  33
  34
  35 /* For backward compatibility only. Obsolete, do not use. */
  36 #ifdef HAVE_PROTOTYPES
  37 #define Py_PROTO(x) x
  38 #else
  39 #define Py_PROTO(x) ()
  40 #endif
  41 #ifndef Py_FPROTO
  42 #define Py_FPROTO(x) Py_PROTO(x)
  43 #endif
  44
  45 /* typedefs for some C9X-defined synonyms for integral types.
  46  *
  47  * The names in Python are exactly the same as the C9X names, except with a
  48  * Py_ prefix.  Until C9X is universally implemented, this is the only way
  49  * to ensure that Python gets reliable names that don't conflict with names
  50  * in non-Python code that are playing their own tricks to define the C9X
  51  * names.
  52  *
  53  * NOTE: don't go nuts here!  Python has no use for *most* of the C9X
  54  * integral synonyms.  Only define the ones we actually need.
  55  */
  56
  57 #ifdef HAVE_LONG_LONG
  58 #ifndef PY_LONG_LONG
  59 #define PY_LONG_LONG long long
  60 #endif
  61 #endif /* HAVE_LONG_LONG */
  62
  63 /* uintptr_t is the C9X name for an unsigned integral type such that a
  64  * legitimate void* can be cast to uintptr_t and then back to void* again
  65  * without loss of information.  Similarly for intptr_t, wrt a signed
  66  * integral type.
  67  */
  68 #ifdef HAVE_UINTPTR_T
  69 typedef uintptr_t       Py_uintptr_t;
  70 typedef intptr_t        Py_intptr_t;
  71
  72 #elif SIZEOF_VOID_P <= SIZEOF_INT
  73 typedef unsigned int    Py_uintptr_t;
  74 typedef int             Py_intptr_t;
  75
  76 #elif SIZEOF_VOID_P <= SIZEOF_LONG
  77 typedef unsigned long   Py_uintptr_t;
  78 typedef long            Py_intptr_t;
  79
  80 #elif defined(HAVE_LONG_LONG) && (SIZEOF_VOID_P <= SIZEOF_LONG_LONG)
  81 typedef unsigned PY_LONG_LONG   Py_uintptr_t;
  82 typedef PY_LONG_LONG            Py_intptr_t;
  83
  84 #else
  85 #   error "Python needs a typedef for Py_uintptr_t in pyport.h."
  86 #endif /* HAVE_UINTPTR_T */
  87
  88 /* Py_ssize_t is a signed integral type such that sizeof(Py_ssize_t) ==
  89  * sizeof(size_t).  C99 doesn't define such a thing directly (size_t is an
  90  * unsigned integral type).  See PEP 353 for details.
  91  */
  92 #ifdef HAVE_SSIZE_T
  93 typedef ssize_t         Py_ssize_t;
  94 #elif SIZEOF_VOID_P == SIZEOF_SIZE_T
  95 typedef Py_intptr_t     Py_ssize_t;
  96 #else
  97 #   error "Python needs a typedef for Py_ssize_t in pyport.h."
  98 #endif
  99
 100 /* Largest positive value of type Py_ssize_t. */
 101 #define PY_SSIZE_T_MAX ((Py_ssize_t)(((size_t)-1)>>1))
 102 /* Smallest negative value of type Py_ssize_t. */
 103 #define PY_SSIZE_T_MIN (-PY_SSIZE_T_MAX-1)
 104
 105 /* PY_FORMAT_SIZE_T is a platform-specific modifier for use in a printf
 106  * format to convert an argument with the width of a size_t or Py_ssize_t.
 107  * C99 introduced "z" for this purpose, but not all platforms support that;
 108  * e.g., MS compilers use "I" instead.
 109  *
 110  * These "high level" Python format functions interpret "z" correctly on
 111  * all platforms (Python interprets the format string itself, and does whatever
 112  * the platform C requires to convert a size_t/Py_ssize_t argument):
 113  *
 114  *     PyString_FromFormat
 115  *     PyErr_Format
 116  *     PyString_FromFormatV
 117  *
 118  * Lower-level uses require that you interpolate the correct format modifier
 119  * yourself (e.g., calling printf, fprintf, sprintf, PyOS_snprintf); for
 120  * example,
 121  *
 122  *     Py_ssize_t index;
 123  *     fprintf(stderr, "index %" PY_FORMAT_SIZE_T "d sucks\n", index);
 124  *
 125  * That will expand to %ld, or %Id, or to something else correct for a
 126  * Py_ssize_t on the platform.
 127  */
 128 #ifndef PY_FORMAT_SIZE_T
 129 #   if SIZEOF_SIZE_T == SIZEOF_INT
 130 #       define PY_FORMAT_SIZE_T ""
 131 #   elif SIZEOF_SIZE_T == SIZEOF_LONG
 132 #       define PY_FORMAT_SIZE_T "l"
 133 #   elif defined(MS_WINDOWS)
 134 #       define PY_FORMAT_SIZE_T "I"
 135 #   else
 136 #       error "This platform's pyconfig.h needs to define PY_FORMAT_SIZE_T"
 137 #   endif
 138 #endif
 139
 140 /* Py_LOCAL can be used instead of static to get the fastest possible calling
 141  * convention for functions that are local to a given module.
 142  *
 143  * Py_LOCAL_INLINE does the same thing, and also explicitly requests inlining,
 144  * for platforms that support that.
 145  *
 146  * If PY_LOCAL_AGGRESSIVE is defined before python.h is included, more
 147  * "aggressive" inlining/optimizaion is enabled for the entire module.  This
 148  * may lead to code bloat, and may slow things down for those reasons.  It may
 149  * also lead to errors, if the code relies on pointer aliasing.  Use with
 150  * care.
 151  *
 152  * NOTE: You can only use this for functions that are entirely local to a
 153  * module; functions that are exported via method tables, callbacks, etc,
 154  * should keep using static.
 155  */
 156
 157 #undef USE_INLINE /* XXX - set via configure? */
 158
 159 #if defined(_MSC_VER)
 160 #if defined(PY_LOCAL_AGGRESSIVE)
 161 /* enable more aggressive optimization for visual studio */
 162 #pragma optimize("agtw", on)
 163 #endif
 164 /* ignore warnings if the compiler decides not to inline a function */
 165 #pragma warning(disable: 4710)
 166 /* fastest possible local call under MSVC */
 167 #define Py_LOCAL(type) static type __fastcall
 168 #define Py_LOCAL_INLINE(type) static __inline type __fastcall
 169 #elif defined(USE_INLINE)
 170 #define Py_LOCAL(type) static type
 171 #define Py_LOCAL_INLINE(type) static inline type
 172 #else
 173 #define Py_LOCAL(type) static type
 174 #define Py_LOCAL_INLINE(type) static type
 175 #endif
 176
 177 /* Py_MEMCPY can be used instead of memcpy in cases where the copied blocks
 178  * are often very short.  While most platforms have highly optimized code for
 179  * large transfers, the setup costs for memcpy are often quite high.  MEMCPY
 180  * solves this by doing short copies "in line".
 181  */
 182
 183 #if defined(_MSC_VER)
 184 #define Py_MEMCPY(target, source, length) do {                          \
 185                 size_t i_, n_ = (length);                               \
 186                 char *t_ = (void*) (target);                            \
 187                 const char *s_ = (void*) (source);                      \
 188                 if (n_ >= 16)                                           \
 189                         memcpy(t_, s_, n_);                             \
 190                 else                                                    \
 191                         for (i_ = 0; i_ < n_; i_++)                     \
 192                                 t_[i_] = s_[i_];                        \
 193         } while (0)
 194 #else
 195 #define Py_MEMCPY memcpy
 196 #endif
 197
 198 #include <stdlib.h>
 199
 200 #include <math.h> /* Moved here from the math section, before extern "C" */
 201
 202 /********************************************
 203  * WRAPPER FOR <time.h> and/or <sys/time.h> *
 204  ********************************************/
 205
 206 #ifdef TIME_WITH_SYS_TIME
 207 #include <sys/time.h>
 208 #include <time.h>
 209 #else /* !TIME_WITH_SYS_TIME */
 210 #ifdef HAVE_SYS_TIME_H
 211 #include <sys/time.h>
 212 #else /* !HAVE_SYS_TIME_H */
 213 #include <time.h>
 214 #endif /* !HAVE_SYS_TIME_H */
 215 #endif /* !TIME_WITH_SYS_TIME */
 216
 217
 218 /******************************
 219  * WRAPPER FOR <sys/select.h> *
 220  ******************************/
 221
 222 /* NB caller must include <sys/types.h> */
 223
 224 #ifdef HAVE_SYS_SELECT_H
 225
 226 #include <sys/select.h>
 227
 228 #endif /* !HAVE_SYS_SELECT_H */
 229
 230 /*******************************
 231  * stat() and fstat() fiddling *
 232  *******************************/
 233
 234 /* We expect that stat and fstat exist on most systems.
 235  *  It's confirmed on Unix, Mac and Windows.
 236  *  If you don't have them, add
 237  *      #define DONT_HAVE_STAT
 238  * and/or
 239  *      #define DONT_HAVE_FSTAT
 240  * to your pyconfig.h. Python code beyond this should check HAVE_STAT and
 241  * HAVE_FSTAT instead.
 242  * Also
 243  *      #define DONT_HAVE_SYS_STAT_H
 244  * if <sys/stat.h> doesn't exist on your platform, and
 245  *      #define HAVE_STAT_H
 246  * if <stat.h> does (don't look at me -- ths mess is inherited).
 247  */
 248 #ifndef DONT_HAVE_STAT
 249 #define HAVE_STAT
 250 #endif
 251
 252 #ifndef DONT_HAVE_FSTAT
 253 #define HAVE_FSTAT
 254 #endif
 255
 256 #ifdef RISCOS
 257 #include <sys/types.h>
 258 #include "unixstuff.h"
 259 #endif
 260
 261 #ifndef DONT_HAVE_SYS_STAT_H
 262 #if defined(PYOS_OS2) && defined(PYCC_GCC)
 263 #include <sys/types.h>
 264 #endif
 265 #include <sys/stat.h>
 266 #elif defined(HAVE_STAT_H)
 267 #include <stat.h>
 268 #endif
 269
 270 #if defined(PYCC_VACPP)
 271 /* VisualAge C/C++ Failed to Define MountType Field in sys/stat.h */
 272 #define S_IFMT (S_IFDIR|S_IFCHR|S_IFREG)
 273 #endif
 274
 275 #ifndef S_ISREG
 276 #define S_ISREG(x) (((x) & S_IFMT) == S_IFREG)
 277 #endif
 278
 279 #ifndef S_ISDIR
 280 #define S_ISDIR(x) (((x) & S_IFMT) == S_IFDIR)
 281 #endif
 282
 283
 284 #ifdef __cplusplus
 285 /* Move this down here since some C++ #include's don't like to be included
 286    inside an extern "C" */
 287 extern "C" {
 288 #endif
 289
 290
 291 /* Py_ARITHMETIC_RIGHT_SHIFT
 292  * C doesn't define whether a right-shift of a signed integer sign-extends
 293  * or zero-fills.  Here a macro to force sign extension:
 294  * Py_ARITHMETIC_RIGHT_SHIFT(TYPE, I, J)
 295  *    Return I >> J, forcing sign extension.
 296  * Requirements:
 297  *    I is of basic signed type TYPE (char, short, int, long, or long long).
 298  *    TYPE is one of char, short, int, long, or long long, although long long
 299  *    must not be used except on platforms that support it.
 300  *    J is an integer >= 0 and strictly less than the number of bits in TYPE
 301  *    (because C doesn't define what happens for J outside that range either).
 302  * Caution:
 303  *    I may be evaluated more than once.
 304  */
 305 #ifdef SIGNED_RIGHT_SHIFT_ZERO_FILLS
 306 #define Py_ARITHMETIC_RIGHT_SHIFT(TYPE, I, J) \
 307         ((I) < 0 ? ~((~(unsigned TYPE)(I)) >> (J)) : (I) >> (J))
 308 #else
 309 #define Py_ARITHMETIC_RIGHT_SHIFT(TYPE, I, J) ((I) >> (J))
 310 #endif
 311
 312 /* Py_FORCE_EXPANSION(X)
 313  * "Simply" returns its argument.  However, macro expansions within the
 314  * argument are evaluated.  This unfortunate trickery is needed to get
 315  * token-pasting to work as desired in some cases.
 316  */
 317 #define Py_FORCE_EXPANSION(X) X
 318
 319 /* Py_SAFE_DOWNCAST(VALUE, WIDE, NARROW)
 320  * Cast VALUE to type NARROW from type WIDE.  In Py_DEBUG mode, this
 321  * assert-fails if any information is lost.
 322  * Caution:
 323  *    VALUE may be evaluated more than once.
 324  */
 325 #ifdef Py_DEBUG
 326 #define Py_SAFE_DOWNCAST(VALUE, WIDE, NARROW) \
 327         (assert((WIDE)(NARROW)(VALUE) == (VALUE)), (NARROW)(VALUE))
 328 #else
 329 #define Py_SAFE_DOWNCAST(VALUE, WIDE, NARROW) (NARROW)(VALUE)
 330 #endif
 331
 332 /* Py_IS_NAN(X)
 333  * Return 1 if float or double arg is a NaN, else 0.
 334  * Caution:
 335  *     X is evaluated more than once.
 336  *     This may not work on all platforms.  Each platform has *some*
 337  *     way to spell this, though -- override in pyconfig.h if you have
 338  *     a platform where it doesn't work.
 339  */
 340 #ifndef Py_IS_NAN
 341 #define Py_IS_NAN(X) ((X) != (X))
 342 #endif
 343
 344 /* Py_IS_INFINITY(X)
 345  * Return 1 if float or double arg is an infinity, else 0.
 346  * Caution:
 347  *    X is evaluated more than once.
 348  *    This implementation may set the underflow flag if |X| is very small;
 349  *    it really can't be implemented correctly (& easily) before C99.
 350  *    Override in pyconfig.h if you have a better spelling on your platform.
 351  */
 352 #ifndef Py_IS_INFINITY
 353 #define Py_IS_INFINITY(X) ((X) && (X)*0.5 == (X))
 354 #endif
 355
 356 /* Py_IS_FINITE(X)
 357  * Return 1 if float or double arg is neither infinite nor NAN, else 0.
 358  * Some compilers (e.g. VisualStudio) have intrisics for this, so a special
 359  * macro for this particular test is useful
 360  */
 361 #ifndef Py_IS_FINITE
 362 #define Py_IS_FINITE(X) (!Py_IS_INFINITY(X) && !Py_IS_NAN(X))
 363 #endif
 364
 365 /* HUGE_VAL is supposed to expand to a positive double infinity.  Python
 366  * uses Py_HUGE_VAL instead because some platforms are broken in this
 367  * respect.  We used to embed code in pyport.h to try to worm around that,
 368  * but different platforms are broken in conflicting ways.  If you're on
 369  * a platform where HUGE_VAL is defined incorrectly, fiddle your Python
 370  * config to #define Py_HUGE_VAL to something that works on your platform.
 371  */
 372 #ifndef Py_HUGE_VAL
 373 #define Py_HUGE_VAL HUGE_VAL
 374 #endif
 375
 376 /* Py_OVERFLOWED(X)
 377  * Return 1 iff a libm function overflowed.  Set errno to 0 before calling
 378  * a libm function, and invoke this macro after, passing the function
 379  * result.
 380  * Caution:
 381  *    This isn't reliable.  C99 no longer requires libm to set errno under
 382  *        any exceptional condition, but does require +- HUGE_VAL return
 383  *        values on overflow.  A 754 box *probably* maps HUGE_VAL to a
 384  *        double infinity, and we're cool if that's so, unless the input
 385  *        was an infinity and an infinity is the expected result.  A C89
 386  *        system sets errno to ERANGE, so we check for that too.  We're
 387  *        out of luck if a C99 754 box doesn't map HUGE_VAL to +Inf, or
 388  *        if the returned result is a NaN, or if a C89 box returns HUGE_VAL
 389  *        in non-overflow cases.
 390  *    X is evaluated more than once.
 391  * Some platforms have better way to spell this, so expect some #ifdef'ery.
 392  *
 393  * OpenBSD uses 'isinf()' because a compiler bug on that platform causes
 394  * the longer macro version to be mis-compiled. This isn't optimal, and
 395  * should be removed once a newer compiler is available on that platform.
 396  * The system that had the failure was running OpenBSD 3.2 on Intel, with
 397  * gcc 2.95.3.
 398  *
 399  * According to Tim's checkin, the FreeBSD systems use isinf() to work
 400  * around a FPE bug on that platform.
 401  */
 402 #if defined(__FreeBSD__) || defined(__OpenBSD__)
 403 #define Py_OVERFLOWED(X) isinf(X)
 404 #else
 405 #define Py_OVERFLOWED(X) ((X) != 0.0 && (errno == ERANGE ||    \
 406                                          (X) == Py_HUGE_VAL || \
 407                                          (X) == -Py_HUGE_VAL))
 408 #endif
 409
 410 /* Py_SET_ERRNO_ON_MATH_ERROR(x)
 411  * If a libm function did not set errno, but it looks like the result
 412  * overflowed or not-a-number, set errno to ERANGE or EDOM.  Set errno
 413  * to 0 before calling a libm function, and invoke this macro after,
 414  * passing the function result.
 415  * Caution:
 416  *    This isn't reliable.  See Py_OVERFLOWED comments.
 417  *    X is evaluated more than once.
 418  */
 419 #if defined(__FreeBSD__) || defined(__OpenBSD__) || (defined(__hpux) && defined(__ia64))
 420 #define _Py_SET_EDOM_FOR_NAN(X) if (isnan(X)) errno = EDOM;
 421 #else
 422 #define _Py_SET_EDOM_FOR_NAN(X) ;
 423 #endif
 424 #define Py_SET_ERRNO_ON_MATH_ERROR(X) \
 425         do { \
 426                 if (errno == 0) { \
 427                         if ((X) == Py_HUGE_VAL || (X) == -Py_HUGE_VAL) \
 428                                 errno = ERANGE; \
 429                         else _Py_SET_EDOM_FOR_NAN(X) \
 430                 } \
 431         } while(0)
 432
 433 /* Py_SET_ERANGE_ON_OVERFLOW(x)
 434  * An alias of Py_SET_ERRNO_ON_MATH_ERROR for backward-compatibility.
 435  */
 436 #define Py_SET_ERANGE_IF_OVERFLOW(X) Py_SET_ERRNO_ON_MATH_ERROR(X)
 437
 438 /* Py_ADJUST_ERANGE1(x)
 439  * Py_ADJUST_ERANGE2(x, y)
 440  * Set errno to 0 before calling a libm function, and invoke one of these
 441  * macros after, passing the function result(s) (Py_ADJUST_ERANGE2 is useful
 442  * for functions returning complex results).  This makes two kinds of
 443  * adjustments to errno:  (A) If it looks like the platform libm set
 444  * errno=ERANGE due to underflow, clear errno. (B) If it looks like the
 445  * platform libm overflowed but didn't set errno, force errno to ERANGE.  In
 446  * effect, we're trying to force a useful implementation of C89 errno
 447  * behavior.
 448  * Caution:
 449  *    This isn't reliable.  See Py_OVERFLOWED comments.
 450  *    X and Y may be evaluated more than once.
 451  */
 452 #define Py_ADJUST_ERANGE1(X)                                            \
 453         do {                                                            \
 454                 if (errno == 0) {                                       \
 455                         if ((X) == Py_HUGE_VAL || (X) == -Py_HUGE_VAL)  \
 456                                 errno = ERANGE;                         \
 457                 }                                                       \
 458                 else if (errno == ERANGE && (X) == 0.0)                 \
 459                         errno = 0;                                      \
 460         } while(0)
 461
 462 #define Py_ADJUST_ERANGE2(X, Y)                                         \
 463         do {                                                            \
 464                 if ((X) == Py_HUGE_VAL || (X) == -Py_HUGE_VAL ||        \
 465                     (Y) == Py_HUGE_VAL || (Y) == -Py_HUGE_VAL) {        \
 466                                 if (errno == 0)                         \
 467                                         errno = ERANGE;                 \
 468                 }                                                       \
 469                 else if (errno == ERANGE)                               \
 470                         errno = 0;                                      \
 471         } while(0)
 472
 473 /* Py_DEPRECATED(version)
 474  * Declare a variable, type, or function deprecated.
 475  * Usage:
 476  *    extern int old_var Py_DEPRECATED(2.3);
 477  *    typedef int T1 Py_DEPRECATED(2.4);
 478  *    extern int x() Py_DEPRECATED(2.5);
 479  */
 480 #if defined(__GNUC__) && ((__GNUC__ >= 4) || \
 481                           (__GNUC__ == 3) && (__GNUC_MINOR__ >= 1))
 482 #define Py_DEPRECATED(VERSION_UNUSED) __attribute__((__deprecated__))
 483 #else
 484 #define Py_DEPRECATED(VERSION_UNUSED)
 485 #endif
 486
 487 /**************************************************************************
 488 Prototypes that are missing from the standard include files on some systems
 489 (and possibly only some versions of such systems.)
 490
 491 Please be conservative with adding new ones, document them and enclose them
 492 in platform-specific #ifdefs.
 493 **************************************************************************/
 494
 495 #ifdef SOLARIS
 496 /* Unchecked */
 497 extern int gethostname(char *, int);
 498 #endif
 499
 500 #ifdef __BEOS__
 501 /* Unchecked */
 502 /* It's in the libs, but not the headers... - [cjh] */
 503 int shutdown( int, int );
 504 #endif
 505
 506 #ifdef HAVE__GETPTY
 507 #include <sys/types.h>          /* we need to import mode_t */
 508 extern char * _getpty(int *, int, mode_t, int);
 509 #endif
 510
 511 #if defined(HAVE_OPENPTY) || defined(HAVE_FORKPTY)
 512 #if !defined(HAVE_PTY_H) && !defined(HAVE_LIBUTIL_H)
 513 /* BSDI does not supply a prototype for the 'openpty' and 'forkpty'
 514    functions, even though they are included in libutil. */
 515 #include <termios.h>
 516 extern int openpty(int *, int *, char *, struct termios *, struct winsize *);
 517 extern int forkpty(int *, char *, struct termios *, struct winsize *);
 518 #endif /* !defined(HAVE_PTY_H) && !defined(HAVE_LIBUTIL_H) */
 519 #endif /* defined(HAVE_OPENPTY) || defined(HAVE_FORKPTY) */
 520
 521
 522 /* These are pulled from various places. It isn't obvious on what platforms
 523    they are necessary, nor what the exact prototype should look like (which
 524    is likely to vary between platforms!) If you find you need one of these
 525    declarations, please move them to a platform-specific block and include
 526    proper prototypes. */
 527 #if 0
 528
 529 /* From Modules/resource.c */
 530 extern int getrusage();
 531 extern int getpagesize();
 532
 533 /* From Python/sysmodule.c and Modules/posixmodule.c */
 534 extern int fclose(FILE *);
 535
 536 /* From Modules/posixmodule.c */
 537 extern int fdatasync(int);
 538 #endif /* 0 */
 539
 540
 541 /************************
 542  * WRAPPER FOR <math.h> *
 543  ************************/
 544
 545 #ifndef HAVE_HYPOT
 546 extern double hypot(double, double);
 547 #endif
 548
 549
 550 /* On 4.4BSD-descendants, ctype functions serves the whole range of
 551  * wchar_t character set rather than single byte code points only.
 552  * This characteristic can break some operations of string object
 553  * including str.upper() and str.split() on UTF-8 locales.  This
 554  * workaround was provided by Tim Robbins of FreeBSD project.
 555  */
 556
 557 #ifdef __FreeBSD__
 558 #include <osreldate.h>
 559 #if __FreeBSD_version > 500039
 560 #include <ctype.h>
 561 #include <wctype.h>
 562 #undef isalnum
 563 #define isalnum(c) iswalnum(btowc(c))
 564 #undef isalpha
 565 #define isalpha(c) iswalpha(btowc(c))
 566 #undef islower
 567 #define islower(c) iswlower(btowc(c))
 568 #undef isspace
 569 #define isspace(c) iswspace(btowc(c))
 570 #undef isupper
 571 #define isupper(c) iswupper(btowc(c))
 572 #undef tolower
 573 #define tolower(c) towlower(btowc(c))
 574 #undef toupper
 575 #define toupper(c) towupper(btowc(c))
 576 #endif
 577 #endif
 578
 579
 580 /* Declarations for symbol visibility.
 581
 582   PyAPI_FUNC(type): Declares a public Python API function and return type
 583   PyAPI_DATA(type): Declares public Python data and its type
 584   PyMODINIT_FUNC:   A Python module init function.  If these functions are
 585                     inside the Python core, they are private to the core.
 586                     If in an extension module, it may be declared with
 587                     external linkage depending on the platform.
 588
 589   As a number of platforms support/require "__declspec(dllimport/dllexport)",
 590   we support a HAVE_DECLSPEC_DLL macro to save duplication.
 591 */
 592
 593 /*
 594   All windows ports, except cygwin, are handled in PC/pyconfig.h.
 595
 596   BeOS and cygwin are the only other autoconf platform requiring special
 597   linkage handling and both of these use __declspec().
 598 */
 599 #if defined(__CYGWIN__) || defined(__BEOS__)
 600 #       define HAVE_DECLSPEC_DLL
 601 #endif
 602
 603 /* only get special linkage if built as shared or platform is Cygwin */
 604 #if defined(Py_ENABLE_SHARED) || defined(__CYGWIN__)
 605 #       if defined(HAVE_DECLSPEC_DLL)
 606 #               ifdef Py_BUILD_CORE
 607 #                       define PyAPI_FUNC(RTYPE) __declspec(dllexport) RTYPE
 608 #                       define PyAPI_DATA(RTYPE) extern __declspec(dllexport) RTYPE
 609                         /* module init functions inside the core need no external linkage */
 610                         /* except for Cygwin to handle embedding (FIXME: BeOS too?) */
 611 #                       if defined(__CYGWIN__)
 612 #                               define PyMODINIT_FUNC __declspec(dllexport) void
 613 #                       else /* __CYGWIN__ */
 614 #                               define PyMODINIT_FUNC void
 615 #                       endif /* __CYGWIN__ */
 616 #               else /* Py_BUILD_CORE */
 617                         /* Building an extension module, or an embedded situation */
 618                         /* public Python functions and data are imported */
 619                         /* Under Cygwin, auto-import functions to prevent compilation */
 620                         /* failures similar to http://python.org/doc/FAQ.html#3.24 */
 621 #                       if !defined(__CYGWIN__)
 622 #                               define PyAPI_FUNC(RTYPE) __declspec(dllimport) RTYPE
 623 #                       endif /* !__CYGWIN__ */
 624 #                       define PyAPI_DATA(RTYPE) extern __declspec(dllimport) RTYPE
 625                         /* module init functions outside the core must be exported */
 626 #                       if defined(__cplusplus)
 627 #                               define PyMODINIT_FUNC extern "C" __declspec(dllexport) void
 628 #                       else /* __cplusplus */
 629 #                               define PyMODINIT_FUNC __declspec(dllexport) void
 630 #                       endif /* __cplusplus */
 631 #               endif /* Py_BUILD_CORE */
 632 #       endif /* HAVE_DECLSPEC */
 633 #endif /* Py_ENABLE_SHARED */
 634
 635 /* If no external linkage macros defined by now, create defaults */
 636 #ifndef PyAPI_FUNC
 637 #       define PyAPI_FUNC(RTYPE) RTYPE
 638 #endif
 639 #ifndef PyAPI_DATA
 640 #       define PyAPI_DATA(RTYPE) extern RTYPE
 641 #endif
 642 #ifndef PyMODINIT_FUNC
 643 #       if defined(__cplusplus)
 644 #               define PyMODINIT_FUNC extern "C" void
 645 #       else /* __cplusplus */
 646 #               define PyMODINIT_FUNC void
 647 #       endif /* __cplusplus */
 648 #endif
 649
 650 /* Deprecated DL_IMPORT and DL_EXPORT macros */
 651 #if defined(Py_ENABLE_SHARED) && defined (HAVE_DECLSPEC_DLL)
 652 #       if defined(Py_BUILD_CORE)
 653 #               define DL_IMPORT(RTYPE) __declspec(dllexport) RTYPE
 654 #               define DL_EXPORT(RTYPE) __declspec(dllexport) RTYPE
 655 #       else
 656 #               define DL_IMPORT(RTYPE) __declspec(dllimport) RTYPE
 657 #               define DL_EXPORT(RTYPE) __declspec(dllexport) RTYPE
 658 #       endif
 659 #endif
 660 #ifndef DL_EXPORT
 661 #       define DL_EXPORT(RTYPE) RTYPE
 662 #endif
 663 #ifndef DL_IMPORT
 664 #       define DL_IMPORT(RTYPE) RTYPE
 665 #endif
 666 /* End of deprecated DL_* macros */
 667
 668 /* If the fd manipulation macros aren't defined,
 669    here is a set that should do the job */
 670
 671 #if 0 /* disabled and probably obsolete */
 672
 673 #ifndef FD_SETSIZE
 674 #define FD_SETSIZE      256
 675 #endif
 676
 677 #ifndef FD_SET
 678
 679 typedef long fd_mask;
 680
 681 #define NFDBITS (sizeof(fd_mask) * NBBY)        /* bits per mask */
 682 #ifndef howmany
 683 #define howmany(x, y)   (((x)+((y)-1))/(y))
 684 #endif /* howmany */
 685
 686 typedef struct fd_set {
 687         fd_mask fds_bits[howmany(FD_SETSIZE, NFDBITS)];
 688 } fd_set;
 689
 690 #define FD_SET(n, p)    ((p)->fds_bits[(n)/NFDBITS] |= (1 << ((n) % NFDBITS)))
 691 #define FD_CLR(n, p)    ((p)->fds_bits[(n)/NFDBITS] &= ~(1 << ((n) % NFDBITS)))
 692 #define FD_ISSET(n, p)  ((p)->fds_bits[(n)/NFDBITS] & (1 << ((n) % NFDBITS)))
 693 #define FD_ZERO(p)      memset((char *)(p), '\0', sizeof(*(p)))
 694
 695 #endif /* FD_SET */
 696
 697 #endif /* fd manipulation macros */
 698
 699
 700 /* limits.h constants that may be missing */
 701
 702 #ifndef INT_MAX
 703 #define INT_MAX 2147483647
 704 #endif
 705
 706 #ifndef LONG_MAX
 707 #if SIZEOF_LONG == 4
 708 #define LONG_MAX 0X7FFFFFFFL
 709 #elif SIZEOF_LONG == 8
 710 #define LONG_MAX 0X7FFFFFFFFFFFFFFFL
 711 #else
 712 #error "could not set LONG_MAX in pyport.h"
 713 #endif
 714 #endif
 715
 716 #ifndef LONG_MIN
 717 #define LONG_MIN (-LONG_MAX-1)
 718 #endif
 719
 720 #ifndef LONG_BIT
 721 #define LONG_BIT (8 * SIZEOF_LONG)
 722 #endif
 723
 724 #if LONG_BIT != 8 * SIZEOF_LONG
 725 /* 04-Oct-2000 LONG_BIT is apparently (mis)defined as 64 on some recent
 726  * 32-bit platforms using gcc.  We try to catch that here at compile-time
 727  * rather than waiting for integer multiplication to trigger bogus
 728  * overflows.
 729  */
 730 #error "LONG_BIT definition appears wrong for platform (bad gcc/glibc config?)."
 731 #endif
 732
 733 #ifdef __cplusplus
 734 }
 735 #endif
 736
 737 /*
 738  * Hide GCC attributes from compilers that don't support them.
 739  */
 740 #if (!defined(__GNUC__) || __GNUC__ < 2 || \
 741      (__GNUC__ == 2 && __GNUC_MINOR__ < 7) ) && \
 742     !defined(RISCOS)
 743 #define Py_GCC_ATTRIBUTE(x)
 744 #else
 745 #define Py_GCC_ATTRIBUTE(x) __attribute__(x)
 746 #endif
 747
 748 /* Eliminate end-of-loop code not reached warnings from SunPro C
 749  * when using do{...}while(0) macros
 750  */
 751 #ifdef __SUNPRO_C
 752 #pragma error_messages (off,E_END_OF_LOOP_CODE_NOT_REACHED)
 753 #endif
 754
 755 /*
 756  * Older Microsoft compilers don't support the C99 long long literal suffixes,
 757  * so these will be defined in PC/pyconfig.h for those compilers.
 758  */
 759 #ifndef Py_LL
 760 #define Py_LL(x) x##LL
 761 #endif
 762
 763 #ifndef Py_ULL
 764 #define Py_ULL(x) Py_LL(x##U)
 765 #endif
 766
 767 #endif /* Py_PYPORT_H */