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According to MSVC manual (*1), cl.exe can skip including a header file when that: - contains #pragma once, or - starts with #ifndef, or - starts with #if ! defined. GCC has a similar trick (*2), but it acts more stricter (e. g. there must be _no tokens_ outside of #ifndef...#endif). Sun C lacked #pragma once for a looong time. Oracle Developer Studio 12.5 finally implemented it, but we cannot assume such recent version. This changeset modifies header files so that each of them include strictly one #ifndef...#endif. I believe this is the most portable way to trigger compiler optimizations. [Bug #16770] *1: https://docs.microsoft.com/en-us/cpp/preprocessor/once *2: https://gcc.gnu.org/onlinedocs/cppinternals/Guard-Macros.html
266 lines
5.5 KiB
C++
266 lines
5.5 KiB
C++
#ifndef RUBY_MISSING_H /*-*-C++-*-vi:se ft=cpp:*/
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#define RUBY_MISSING_H 1
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/**
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* @file
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* @author $Author$
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* @date Sat May 11 23:46:03 JST 2002
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* @copyright This file is a part of the programming language Ruby.
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* Permission is hereby granted, to either redistribute and/or
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* modify this file, provided that the conditions mentioned in the
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* file COPYING are met. Consult the file for details.
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* @brief Prototype for *.c in ./missing, and for missing timeval struct.
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*/
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#include "ruby/3/config.h"
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#ifdef STDC_HEADERS
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# include <stddef.h>
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#endif
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#if defined(__cplusplus)
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# include <cmath>
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#else
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# include <math.h> /* for INFINITY and NAN */
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#endif
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#ifdef RUBY_ALTERNATIVE_MALLOC_HEADER
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# include RUBY_ALTERNATIVE_MALLOC_HEADER
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#endif
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#if defined(HAVE_TIME_H)
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# include <time.h>
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#endif
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#if defined(HAVE_SYS_TIME_H)
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# include <sys/time.h>
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#endif
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#ifdef HAVE_IEEEFP_H
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# include <ieeefp.h>
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#endif
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#include "ruby/3/dllexport.h"
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#ifndef M_PI
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# define M_PI 3.14159265358979323846
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#endif
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#ifndef M_PI_2
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# define M_PI_2 (M_PI/2)
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#endif
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#if !defined(HAVE_STRUCT_TIMEVAL)
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struct timeval {
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time_t tv_sec; /* seconds */
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long tv_usec; /* microseconds */
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};
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#endif /* HAVE_STRUCT_TIMEVAL */
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#if !defined(HAVE_STRUCT_TIMESPEC)
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/* :BEWARE: @shyouhei warns that IT IS A WRONG IDEA to define our own version
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* of struct timespec here. `clock_gettime` is a system call, and your kernel
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* could expect something other than just `long` (results stack smashing if
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* that happens). See also https://ewontfix.com/19/ */
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struct timespec {
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time_t tv_sec; /* seconds */
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long tv_nsec; /* nanoseconds */
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};
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#endif
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#if !defined(HAVE_STRUCT_TIMEZONE)
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struct timezone {
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int tz_minuteswest;
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int tz_dsttime;
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};
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#endif
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RUBY3_SYMBOL_EXPORT_BEGIN()
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#ifndef HAVE_ACOSH
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RUBY_EXTERN double acosh(double);
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RUBY_EXTERN double asinh(double);
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RUBY_EXTERN double atanh(double);
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#endif
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#ifndef HAVE_CRYPT
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RUBY_EXTERN char *crypt(const char *, const char *);
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#endif
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#ifndef HAVE_DUP2
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RUBY_EXTERN int dup2(int, int);
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#endif
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#ifndef HAVE_EACCESS
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RUBY_EXTERN int eaccess(const char*, int);
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#endif
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#ifndef HAVE_ROUND
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RUBY_EXTERN double round(double); /* numeric.c */
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#endif
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#ifndef HAVE_FINITE
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RUBY_EXTERN int finite(double);
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#endif
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#ifndef HAVE_FLOCK
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RUBY_EXTERN int flock(int, int);
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#endif
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/*
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#ifndef HAVE_FREXP
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RUBY_EXTERN double frexp(double, int *);
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#endif
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*/
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#ifndef HAVE_HYPOT
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RUBY_EXTERN double hypot(double, double);
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#endif
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#ifndef HAVE_ERF
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RUBY_EXTERN double erf(double);
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RUBY_EXTERN double erfc(double);
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#endif
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#ifndef HAVE_TGAMMA
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RUBY_EXTERN double tgamma(double);
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#endif
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#ifndef HAVE_LGAMMA_R
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RUBY_EXTERN double lgamma_r(double, int *);
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#endif
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#ifndef HAVE_CBRT
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RUBY_EXTERN double cbrt(double);
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#endif
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#if !defined(INFINITY) || !defined(NAN)
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union bytesequence4_or_float {
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unsigned char bytesequence[4];
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float float_value;
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};
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#endif
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#ifndef INFINITY
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/** @internal */
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RUBY_EXTERN const union bytesequence4_or_float rb_infinity;
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# define INFINITY (rb_infinity.float_value)
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# define USE_RB_INFINITY 1
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#endif
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#ifndef NAN
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/** @internal */
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RUBY_EXTERN const union bytesequence4_or_float rb_nan;
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# define NAN (rb_nan.float_value)
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# define USE_RB_NAN 1
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#endif
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#ifndef HUGE_VAL
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# define HUGE_VAL ((double)INFINITY)
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#endif
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#if defined(isinf)
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# /* Take that. */
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#elif defined(HAVE_ISINF)
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# /* Take that. */
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#elif defined(HAVE_FINITE) && defined(HAVE_ISNAN)
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# define isinf(x) (!finite(x) && !isnan(x))
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#elif defined(__cplusplus) && __cplusplus >= 201103L
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# // <cmath> must include constexpr bool isinf(double);
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#else
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RUBY_EXTERN int isinf(double);
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#endif
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#if defined(isnan)
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# /* Take that. */
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#elif defined(HAVE_ISNAN)
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# /* Take that. */
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#elif defined(__cplusplus) && __cplusplus >= 201103L
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# // <cmath> must include constexpr bool isnan(double);
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#else
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RUBY_EXTERN int isnan(double);
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#endif
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#if defined(isfinite)
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# /* Take that. */
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#elif defined(HAVE_ISFINITE)
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# /* Take that. */
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#else
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# define HAVE_ISFINITE 1
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# define isfinite(x) finite(x)
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#endif
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#ifndef HAVE_NAN
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RUBY_EXTERN double nan(const char *);
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#endif
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#ifndef HAVE_NEXTAFTER
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RUBY_EXTERN double nextafter(double x, double y);
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#endif
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/*
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#ifndef HAVE_MEMCMP
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RUBY_EXTERN int memcmp(const void *, const void *, size_t);
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#endif
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*/
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#ifndef HAVE_MEMMOVE
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RUBY_EXTERN void *memmove(void *, const void *, size_t);
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#endif
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/*
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#ifndef HAVE_MODF
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RUBY_EXTERN double modf(double, double *);
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#endif
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*/
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#ifndef HAVE_STRCHR
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RUBY_EXTERN char *strchr(const char *, int);
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RUBY_EXTERN char *strrchr(const char *, int);
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#endif
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#ifndef HAVE_STRERROR
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RUBY_EXTERN char *strerror(int);
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#endif
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#ifndef HAVE_STRSTR
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RUBY_EXTERN char *strstr(const char *, const char *);
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#endif
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#ifndef HAVE_STRLCPY
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RUBY_EXTERN size_t strlcpy(char *, const char*, size_t);
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#endif
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#ifndef HAVE_STRLCAT
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RUBY_EXTERN size_t strlcat(char *, const char*, size_t);
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#endif
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#ifndef HAVE_SIGNBIT
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RUBY_EXTERN int signbit(double x);
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#endif
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#ifndef HAVE_FFS
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RUBY_EXTERN int ffs(int);
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#endif
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#ifdef BROKEN_CLOSE
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# include <sys/types.h>
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# include <sys/socket.h>
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RUBY_EXTERN int ruby_getpeername(int, struct sockaddr *, socklen_t *);
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RUBY_EXTERN int ruby_getsockname(int, struct sockaddr *, socklen_t *);
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RUBY_EXTERN int ruby_shutdown(int, int);
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RUBY_EXTERN int ruby_close(int);
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#endif
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#ifndef HAVE_SETPROCTITLE
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RUBY_EXTERN void setproctitle(const char *fmt, ...);
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#endif
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#ifdef HAVE_EXPLICIT_BZERO
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# /* Take that. */
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#elif defined(SecureZeroMemory)
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# define explicit_bzero(b, len) SecureZeroMemory(b, len)
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#else
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RUBY_EXTERN void explicit_bzero(void *b, size_t len);
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#endif
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RUBY3_SYMBOL_EXPORT_END()
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#endif /* RUBY_MISSING_H */
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