1 .\" Copyright 1995 Jim Van Zandt <jrv@vanzandt.mv.com>
2 .\" and Copyright 2008, Linux Foundation, written by Michael Kerrisk
3 .\" <mtk.manpages@gmail.com>
5 .\" Permission is granted to make and distribute verbatim copies of this
6 .\" manual provided the copyright notice and this permission notice are
7 .\" preserved on all copies.
9 .\" Permission is granted to copy and distribute modified versions of this
10 .\" manual under the conditions for verbatim copying, provided that the
11 .\" entire resulting derived work is distributed under the terms of a
12 .\" permission notice identical to this one.
14 .\" Since the Linux kernel and libraries are constantly changing, this
15 .\" manual page may be incorrect or out-of-date. The author(s) assume no
16 .\" responsibility for errors or omissions, or for damages resulting from
17 .\" the use of the information contained herein. The author(s) may not
18 .\" have taken the same level of care in the production of this manual,
19 .\" which is licensed free of charge, as they might when working
22 .\" Formatted or processed versions of this manual, if unaccompanied by
23 .\" the source, must acknowledge the copyright and authors of this work.
25 .\" Modified 2002-07-27 by Walter Harms
26 .\" (walter.harms@informatik.uni-oldenburg.de)
28 .\" Japanese Version Copyright (c) 2003 Akihiro MOTOKI
29 .\" all rights reserved.
30 .\" Translated Wed Aug 6 00:35:20 JST 2003
31 .\" by Akihiro MOTOKI <amotoki@dd.iij4u.or.jp>
32 .\" Updated 2008-09-16, Akihiro MOTOKI <amotoki@dd.iij4u.or.jp>
34 .TH LOG1P 3 2008-08-05 "" "Linux Programmer's Manual"
36 log1p, log1pf, log1pl \- °ú¤¿ô¤Ë 1 ¤ò²Ã¤¨¤¿ÃͤÎÂпô
41 .BI "double log1p(double " x );
43 .BI "float log1pf(float " x );
45 .BI "long double log1pl(long double " x );
48 \fI\-lm\fP ¤Ç¥ê¥ó¥¯¤¹¤ë¡£
51 glibc ¸þ¤±¤Îµ¡Ç½¸¡ºº¥Þ¥¯¥í¤ÎÍ×·ï
52 .RB ( feature_test_macros (7)
58 _BSD_SOURCE || _SVID_SOURCE || _XOPEN_SOURCE\ >=\ 500 || _ISOC99_SOURCE; or
63 _BSD_SOURCE || _SVID_SOURCE || _XOPEN_SOURCE\ >=\ 600 || _ISOC99_SOURCE; or
68 ¤Ï°Ê²¼¤ÈÅù²Á¤ÊÃͤòÊÖ¤¹¡£
74 \fIx\fP ¤ÎÃͤ¬ 0 ¤Ë¶á¤¤¾ì¹ç¤Ç¤âÀµ³Î¤Ë·×»»¤Ç¤¤ëÊýË¡¤¬ÍѤ¤¤é¤ì¤ë¡£
76 À®¸ù¤¹¤ë¤È¡¢¤³¤ì¤é¤Î´Ø¿ô¤Ï
81 ¤¬ NaN ¤Î¾ì¹ç¡¢NaN ¤¬ÊÖ¤µ¤ì¤ë¡£
84 ¤¬Àµ¤Î̵¸ÂÂç¤Î¾ì¹ç¡¢Àµ¤Î̵¸ÂÂ礬ÊÖ¤µ¤ì¤ë¡£
87 ¤¬ \-1 ¤Î¾ì¹ç¡¢¶Ë¥¨¥é¡¼ (pole error) ¤¬È¯À¸¤·¡¢
95 ¤¬ \-1 ¤è¤ê¾®¤µ¤¤¾ì¹ç (Éé¤Î̵¸ÂÂç¤â´Þ¤à)¡¢
96 Îΰ襨¥é¡¼ (domain error) ¤¬È¯À¸¤·¡¢
97 NaN (not a number) ¤¬ÊÖ¤µ¤ì¤ë¡£
98 .\" POSIX.1 specifies a possible range error if x is subnormal
99 .\" glibc 2.8 doesn't do this
101 ¤³¤ì¤é¤Î´Ø¿ô¤ò¸Æ¤Ó½Ð¤·¤¿ºÝ¤Ë¥¨¥é¡¼¤¬È¯À¸¤·¤¿¤«¤ÎȽÄêÊýË¡¤Ë¤Ä¤¤¤Æ¤Î¾ðÊó¤Ï
105 °Ê²¼¤Î¥¨¥é¡¼¤¬È¯À¸¤¹¤ë²ÄǽÀ¤¬¤¢¤ë¡£
107 Îΰ襨¥é¡¼ (domain error): \fIx\fP ¤¬ \-1 ¤è¤ê¾®¤µ¤¤
111 ÉÔÀµ (invalid) ÉâÆ°¾®¿ôÅÀÎã³°
115 ¶Ë¥¨¥é¡¼ (pole error): \fIx\fP ¤¬ \-1 ¤Ç¤¢¤ë
119 0 ¤Ë¤è¤ë½ü»» (divide-by-zero) ÉâÆ°¾®¿ôÅÀÎã³°
126 .\" FIXME . Is it intentional that these functions do not set errno?
127 .\" log(), log2(), log10() do set errno
128 .\" Bug raised: http://sources.redhat.com/bugzilla/show_bug.cgi?id=6792