git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@2368 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
nobu 2002-04-12 03:24:52 +00:00
parent 1aa67cb1d3
commit be5524ae41
5 changed files with 119 additions and 11 deletions

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@ -1,3 +1,16 @@
Fri Apr 12 00:34:17 2002 Nobuyoshi Nakada <nobu.nakada@nifty.ne.jp>
* MANIFEST (missing/acosh.c): added.
* Makefile.in (missing/acosh.c): ditto.
* Makefile.in (missing/fileblocks.c): ditto.
* configure.in (AC_REPLACE_FUNCS): check acosh() on behalf of
inverse hyperbolic functions, asinh() and atanh().
* missing/acosh.c: added for acosh(), asinh() and atanh().
Thu Apr 11 19:10:37 2002 WATANABE Hirofumi <eban@ruby-lang.org>
* io.c (remain_size): IO#read returns "" if file.size == 0.

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@ -205,6 +205,7 @@ misc/inf-ruby.el
misc/ruby-mode.el
misc/rubydb2x.el
misc/rubydb3x.el
missing/acosh.c
missing/alloca.c
missing/crypt.c
missing/dup2.c

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@ -165,6 +165,9 @@ parse.c: parse.y
parse.@OBJEXT@: parse.c
acosh.@OBJEXT@: $(srcdir)/missing/acosh.c
$(CC) -I. $(CFLAGS) $(CPPFLAGS) -c $(srcdir)/missing/acosh.c
alloca.@OBJEXT@: $(srcdir)/missing/alloca.c
$(CC) -I. $(CFLAGS) $(CPPFLAGS) -c $(srcdir)/missing/alloca.c
@ -174,6 +177,9 @@ crypt.@OBJEXT@: $(srcdir)/missing/crypt.c
dup2.@OBJEXT@: $(srcdir)/missing/dup2.c
$(CC) -I. $(CFLAGS) $(CPPFLAGS) -c $(srcdir)/missing/dup2.c
fileblocks.@OBJEXT@: $(srcdir)/missing/fileblocks.c
$(CC) -I. $(CFLAGS) $(CPPFLAGS) -c $(srcdir)/missing/fileblocks.c
finite.@OBJEXT@: $(srcdir)/missing/finite.c
$(CC) -I. $(CFLAGS) $(CPPFLAGS) -c $(srcdir)/missing/finite.c

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@ -301,7 +301,7 @@ AC_FUNC_FSEEKO
AC_CHECK_FUNCS(ftello)
AC_REPLACE_FUNCS(dup2 memmove mkdir strcasecmp strncasecmp strerror strftime\
strchr strstr strtoul crypt flock vsnprintf\
isinf isnan finite hypot)
isinf isnan finite hypot acosh)
AC_CHECK_FUNCS(fmod killpg drand48 random wait4 waitpid syscall chroot fsync\
truncate chsize times utimes fcntl lockf lstat symlink readlink\
setitimer setruid seteuid setreuid setresuid setproctitle\

88
missing/acosh.c Normal file
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@ -0,0 +1,88 @@
/**********************************************************************
acosh.c -
$Author$
$Date$
created at: Fri Apr 12 00:34:17 JST 2002
public domain rewrite of acosh(3), asinh(3) and atanh(3)
**********************************************************************/
#include <errno.h>
#include <float.h>
#include <math.h>
/* DBL_MANT_DIG must be less than 4 times of bits of int */
#ifdef DBL_MANT_DIG
#define DBL_MANT_DIG 53 /* in this case, at least 12 digit precision */
#endif
#define BIG_CRITERIA_BIT (1<<DBL_MANT_DIG/2)
#if BIG_CRITERIA_BIT > 0
#define BIG_CRITERIA (1.0*BIG_CRITERIA_BIT)
#else
#define BIG_CRITERIA (1.0*(1<<DBL_MANT_DIG/4)*(1<<(DBL_MANT_DIG/2+1-DBL_MANT_DIG/4)))
#endif
#define SMALL_CRITERIA_BIT (1<<(DBL_MANT_DIG/3))
#if SMALL_CRITERIA_BIT > 0
#define SMALL_CRITERIA (1.0/SMALL_CRITERIA_BIT)
#else
#define SMALL_CRITERIA (1.0*(1<<DBL_MANT_DIG/4)*(1<<(DBL_MANT_DIG/3+1-DBL_MANT_DIG/4)))
#endif
#ifndef HAVE_ACOSH
double
acosh(x)
double x;
{
if (x < 1)
x = -1; /* NaN */
else if (x == 1)
return 0;
else if (x > BIG_CRITERIA)
x += x;
else
x += sqrt((x + 1) * (x - 1));
return log(x);
}
#endif
#ifndef HAVE_ASINH
double
asinh(x)
double x;
{
int neg = x < 0;
double z = fabs(x);
if (z < SMALL_CRITERIA) return x;
if (z < (1.0/(1<<DBL_MANT_DIG/5))) {
double x2 = z * z;
z *= 1 + x2 * (-1.0/6.0 + x2 * 3.0/40.0);
}
else if (z > BIG_CRITERIA) {
z = log(z + z);
}
else {
z = log(z + sqrt(z * z + 1));
}
if (neg) z = -z;
return z;
}
#endif
#ifndef HAVE_ATANH
double
atanh(x)
double x;
{
int neg = x < 0;
double z = fabs(x);
if (z < SMALL_CRITERIA) return x;
z = log(z > 1 ? -1 : (1 + z) / (1 - z)) / 2;
if (neg) z = -z;
return z;
}
#endif