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-rw-r--r--include/ruby/missing.h342
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diff --git a/include/ruby/missing.h b/include/ruby/missing.h
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--- /dev/null
+++ b/include/ruby/missing.h
@@ -0,0 +1,342 @@
+#ifndef RUBY_MISSING_H /*-*-C++-*-vi:se ft=cpp:*/
+#define RUBY_MISSING_H 1
+/**
+ * @author $Author$
+ * @date Sat May 11 23:46:03 JST 2002
+ * @copyright This file is a part of the programming language Ruby.
+ * Permission is hereby granted, to either redistribute and/or
+ * modify this file, provided that the conditions mentioned in the
+ * file COPYING are met. Consult the file for details.
+ * @brief Prototype for *.c in ./missing, and for missing timeval struct.
+ */
+#include "ruby/internal/config.h"
+
+#ifdef STDC_HEADERS
+# include <stddef.h>
+#endif
+
+#if defined(__cplusplus)
+# include <cmath>
+#else
+# include <math.h> /* for INFINITY and NAN */
+#endif
+
+#ifdef RUBY_ALTERNATIVE_MALLOC_HEADER
+# include RUBY_ALTERNATIVE_MALLOC_HEADER
+#endif
+
+#if defined(HAVE_TIME_H)
+# include <time.h>
+#endif
+
+#if defined(HAVE_SYS_TIME_H)
+# include <sys/time.h>
+#endif
+
+#ifdef HAVE_SYS_STAT_H
+# include <sys/stat.h>
+#endif
+
+#ifdef HAVE_UNISTD_H
+# include <unistd.h>
+#endif
+
+#ifdef HAVE_STDIO_H
+# include <stdio.h>
+#endif
+
+#ifdef HAVE_IEEEFP_H
+# include <ieeefp.h>
+#endif
+
+#include "ruby/internal/dllexport.h"
+#include "ruby/internal/attr/format.h"
+
+#ifndef M_PI
+# define M_PI 3.14159265358979323846
+#endif
+#ifndef M_PI_2
+# define M_PI_2 (M_PI/2)
+#endif
+
+#if !defined(HAVE_STRUCT_TIMEVAL)
+struct timeval {
+ time_t tv_sec; /* seconds */
+ long tv_usec; /* microseconds */
+};
+#endif /* HAVE_STRUCT_TIMEVAL */
+
+#if !defined(HAVE_STRUCT_TIMESPEC)
+/* :BEWARE: @shyouhei warns that IT IS A WRONG IDEA to define our own version
+ * of struct timespec here. `clock_gettime` is a system call, and your kernel
+ * could expect something other than just `long` (results stack smashing if
+ * that happens). See also https://ewontfix.com/19/ */
+struct timespec {
+ time_t tv_sec; /* seconds */
+ long tv_nsec; /* nanoseconds */
+};
+#endif
+
+#if !defined(HAVE_STRUCT_TIMEZONE)
+struct timezone {
+ int tz_minuteswest;
+ int tz_dsttime;
+};
+#endif
+
+RBIMPL_SYMBOL_EXPORT_BEGIN()
+
+#ifndef HAVE_ACOSH
+RUBY_EXTERN double acosh(double);
+RUBY_EXTERN double asinh(double);
+RUBY_EXTERN double atanh(double);
+#endif
+
+#ifndef HAVE_CRYPT
+RUBY_EXTERN char *crypt(const char *, const char *);
+#endif
+
+#ifndef HAVE_EACCESS
+RUBY_EXTERN int eaccess(const char*, int);
+#endif
+
+#ifndef HAVE_ROUND
+RUBY_EXTERN double round(double); /* numeric.c */
+#endif
+
+#ifndef HAVE_FLOCK
+RUBY_EXTERN int flock(int, int);
+#endif
+
+/*
+#ifndef HAVE_FREXP
+RUBY_EXTERN double frexp(double, int *);
+#endif
+*/
+
+#ifndef HAVE_HYPOT
+RUBY_EXTERN double hypot(double, double);
+#endif
+
+#ifndef HAVE_ERF
+RUBY_EXTERN double erf(double);
+RUBY_EXTERN double erfc(double);
+#endif
+
+#ifndef HAVE_TGAMMA
+RUBY_EXTERN double tgamma(double);
+#endif
+
+#ifndef HAVE_LGAMMA_R
+RUBY_EXTERN double lgamma_r(double, int *);
+#endif
+
+#ifndef HAVE_CBRT
+RUBY_EXTERN double cbrt(double);
+#endif
+
+#if !defined(INFINITY) || !defined(NAN)
+union bytesequence4_or_float {
+ unsigned char bytesequence[4];
+ float float_value;
+};
+#endif
+
+#ifndef INFINITY
+/** @internal */
+RUBY_EXTERN const union bytesequence4_or_float rb_infinity;
+# define INFINITY (rb_infinity.float_value)
+# define USE_RB_INFINITY 1
+#endif
+
+#ifndef NAN
+/** @internal */
+RUBY_EXTERN const union bytesequence4_or_float rb_nan;
+# define NAN (rb_nan.float_value)
+# define USE_RB_NAN 1
+#endif
+
+#ifndef HUGE_VAL
+# define HUGE_VAL ((double)INFINITY)
+#endif
+
+#ifndef HAVE_FINITE
+# define HAVE_FINITE 1
+# define finite(x) isfinite(x)
+#endif
+
+#ifndef HAVE_NAN
+RUBY_EXTERN double nan(const char *);
+#endif
+
+#ifndef HAVE_NEXTAFTER
+RUBY_EXTERN double nextafter(double x, double y);
+#endif
+
+/*
+#ifndef HAVE_MEMCMP
+RUBY_EXTERN int memcmp(const void *, const void *, size_t);
+#endif
+*/
+
+#ifndef HAVE_MEMMOVE
+RUBY_EXTERN void *memmove(void *, const void *, size_t);
+#endif
+
+/*
+#ifndef HAVE_MODF
+RUBY_EXTERN double modf(double, double *);
+#endif
+*/
+
+#ifndef HAVE_STRCHR
+RUBY_EXTERN char *strchr(const char *, int);
+RUBY_EXTERN char *strrchr(const char *, int);
+#endif
+
+#ifndef HAVE_STRERROR
+RUBY_EXTERN char *strerror(int);
+#endif
+
+#ifndef HAVE_STRSTR
+RUBY_EXTERN char *strstr(const char *, const char *);
+#endif
+
+#ifndef HAVE_STRLCPY
+RUBY_EXTERN size_t strlcpy(char *, const char*, size_t);
+#endif
+
+#ifndef HAVE_STRLCAT
+RUBY_EXTERN size_t strlcat(char *, const char*, size_t);
+#endif
+
+#ifndef HAVE_FFS
+RUBY_EXTERN int ffs(int);
+#endif
+
+#ifdef BROKEN_CLOSE
+# include <sys/types.h>
+# include <sys/socket.h>
+RUBY_EXTERN int ruby_getpeername(int, struct sockaddr *, socklen_t *);
+RUBY_EXTERN int ruby_getsockname(int, struct sockaddr *, socklen_t *);
+RUBY_EXTERN int ruby_shutdown(int, int);
+RUBY_EXTERN int ruby_close(int);
+#endif
+
+#ifndef HAVE_SETPROCTITLE
+RBIMPL_ATTR_FORMAT(RBIMPL_PRINTF_FORMAT, 1, 2)
+RUBY_EXTERN void setproctitle(const char *fmt, ...);
+#endif
+
+#ifdef HAVE_EXPLICIT_BZERO
+# /* Take that. */
+#elif defined(SecureZeroMemory)
+# define explicit_bzero(b, len) SecureZeroMemory(b, len)
+#else
+RUBY_EXTERN void explicit_bzero(void *b, size_t len);
+#endif
+
+#ifndef HAVE_TZSET
+RUBY_EXTERN void tzset(void);
+#endif
+
+#ifndef HAVE_POSIX_MADVISE
+RUBY_EXTERN int posix_madvise(void *, size_t, int);
+#endif
+
+#ifndef HAVE_GETEUID
+RUBY_EXTERN rb_uid_t geteuid(void);
+#endif
+
+#ifndef HAVE_GETUID
+RUBY_EXTERN rb_uid_t getuid(void);
+#endif
+
+#ifndef HAVE_GETEGID
+RUBY_EXTERN rb_gid_t getegid(void);
+#endif
+
+#ifndef HAVE_GETGID
+RUBY_EXTERN rb_gid_t getgid(void);
+#endif
+
+#ifndef HAVE_GETLOGIN
+RUBY_EXTERN char *getlogin(void);
+#endif
+
+#ifndef HAVE_GETPPID
+RUBY_EXTERN rb_pid_t getppid(void);
+#endif
+
+#ifndef HAVE_UMASK
+RUBY_EXTERN rb_mode_t umask(rb_mode_t);
+#endif
+
+#ifndef HAVE_CHMOD
+RUBY_EXTERN int chmod(const char *, rb_mode_t);
+#endif
+
+#ifndef HAVE_CHOWN
+RUBY_EXTERN int chown(const char *, rb_uid_t, rb_gid_t);
+#endif
+
+#ifndef HAVE_PCLOSE
+RUBY_EXTERN int pclose(FILE *);
+#endif
+
+#ifndef HAVE_POPEN
+RUBY_EXTERN FILE *popen(const char *, const char *);
+#endif
+
+#ifndef HAVE_PIPE
+RUBY_EXTERN int pipe(int [2]);
+#endif
+
+#ifndef HAVE_DUP
+RUBY_EXTERN int dup(int);
+#endif
+
+#ifndef HAVE_DUP2
+RUBY_EXTERN int dup2(int, int);
+#endif
+
+#ifndef HAVE_KILL
+RUBY_EXTERN int kill(rb_pid_t, int);
+#endif
+
+#ifndef HAVE_EXECL
+RUBY_EXTERN int execl(const char *, const char *, ...);
+#endif
+
+#ifndef HAVE_EXECLE
+RUBY_EXTERN int execle(const char *, const char *, ...);
+#endif
+
+#ifndef HAVE_EXECV
+RUBY_EXTERN int execv(const char *, char *const []);
+#endif
+
+#ifndef HAVE_EXECVE
+RUBY_EXTERN int execve(const char *, char *const [], char *const []);
+#endif
+
+#ifndef HAVE_SHUTDOWN
+RUBY_EXTERN int shutdown(int, int);
+#endif
+
+#ifndef HAVE_SYSTEM
+RUBY_EXTERN int system(const char *);
+#endif
+
+#ifndef WNOHANG
+# define WNOHANG 0
+#endif
+
+#ifndef HAVE_WAITPID
+# define HAVE_WAITPID 1
+RUBY_EXTERN rb_pid_t waitpid(rb_pid_t, int *, int);
+#endif
+
+RBIMPL_SYMBOL_EXPORT_END()
+
+#endif /* RUBY_MISSING_H */