1 .\" Copyright 2002 Walter Harms (walter.harms@informatik.uni-oldenburg.de)
2 .\" and Copyright 2008, Linux Foundation, written by Michael Kerrisk
3 .\" <mtk.manpages@gmail.com>
4 .\" Distributed under GPL
5 .\" Based on glibc infopages
7 .\" Japanese Version Copyright (c) 2003 Akihiro MOTOKI all rights reserved.
8 .\" Translated Mon Jan 27 2003 by Akihiro MOTOKI <amotoki@dd.iij4u.or.jp>
9 .\" Updated 2008-09-18, Akihiro MOTOKI <amotoki@dd.iij4u.or.jp>
11 .\"WORD: mantissa ²¾¿ôÉô
12 .\"WORD: normalized Àµµ¬²½¤µ¤ì¤¿
13 .\"WORD: subnormal ÈóÀµµ¬²½¤Î
15 .TH NEXTAFTER 3 2010-09-20 "GNU" "Linux Programmer's Manual"
17 nextafter, nextafterf, nextafterl, nexttoward, nexttowardf, nexttowardl \-
22 .BI "double nextafter(double " x ", double " y );
24 .BI "float nextafterf(float " x ", float " y );
26 .BI "long double nextafterl(long double " x ", long double " y );
28 .BI "double nexttoward(double " x ", long double " y );
30 .BI "float nexttowardf(float " x ", long double " y );
32 .BI "long double nexttowardl(long double " x ", long double " y );
34 \fI\-lm\fP ¤Ç¥ê¥ó¥¯¤¹¤ë¡£
37 glibc ¸þ¤±¤Îµ¡Ç½¸¡ºº¥Þ¥¯¥í¤ÎÍ×·ï
38 .RB ( feature_test_macros (7)
45 _BSD_SOURCE || _SVID_SOURCE || _XOPEN_SOURCE\ >=\ 500 ||
46 _XOPEN_SOURCE\ &&\ _XOPEN_SOURCE_EXTENDED ||
48 _POSIX_C_SOURCE\ >=\ 200112L;
57 _BSD_SOURCE || _SVID_SOURCE || _XOPEN_SOURCE\ >=\ 600 || _ISOC99_SOURCE ||
58 _POSIX_C_SOURCE\ >=\ 200112L;
68 _XOPEN_SOURCE\ >=\ 600 || _ISOC99_SOURCE ||
69 _POSIX_C_SOURCE\ >=\ 200112L;
77 ´Ø¿ô·²¤Ï¡¢\fIy\fP ¤Ë¸þ¤«¤¦Êý¸þ¤Ç \fIx\fP ¤Î¤¹¤°¼¡¤ÎÉâÆ°¾®¿ôÅÀ¿ôɽ¸½¤òÊÖ¤¹¡£
83 ¤è¤ê¾®¤µ¤¤ºÇÂç¤ÎÉâÆ°¾®¿ôÅÀɽ¸½¤ÎÃͤòÊÖ¤¹¡£
85 \fIx\fP ¤¬ \fIy\fP ¤ÈÅù¤·¤¤¾ì¹ç¡¢\fIy\fP ¤¬ÊÖ¤µ¤ì¤ë¡£
88 ´Ø¿ô·²¤Ï¡¢2 ÈÖÌܤΰú¤¿ô¤¬
92 ´Ø¿ô·²¤ÈƱ¤¸¤Ï¤¿¤é¤¤ò¤¹¤ë¡£
94 À®¸ù¤¹¤ë¤È¡¢¤³¤ì¤é¤Î´Ø¿ô¤Ï \fIy\fP ¤Ë¸þ¤«¤¦Êý¸þ¤Ç \fIx\fP ¤Î
95 ¤¹¤°¼¡¤ÎÉâÆ°¾®¿ôÅÀ¿ôɽ¸½¤òÊÖ¤¹¡£
102 ¤ÈƱ¤¸·¿¤Ë¥¥ã¥¹¥È¤µ¤ì¤¿)
109 ¤¬ NaN ¤Î¾ì¹ç¡¢NaN ¤¬ÊÖ¤µ¤ì¤ë¡£
114 ·ë²Ì¤¬¥ª¡¼¥Ð¡¼¥Õ¥í¡¼¤¹¤ë¾ì¹ç¡¢
115 ÈÏ°Ï¥¨¥é¡¼ (range error) ¤¬È¯À¸¤·¡¢
120 ¤òÊÖ¤¹¡£ÊÖ¤êÃͤˤϿô³ØŪ¤ËÀµ¤·¤¤Éä¹æ¤¬ÉÕÍ¿¤µ¤ì¤ë¡£
125 ¤ÈƱ¤¸¤Ç¤Ï¤Ê¤¯¡¢Àµ¤·¤¤´Ø¿ô¤Î·ë²Ì¤¬ÈóÀµµ¬²½¿ô¤«¥¼¥í¤«¥¢¥ó¥À¡¼¥Õ¥í¡¼¤Î¾ì¹ç¡¢
127 (ɽ¸½²Äǽ¤Ê¾ì¹ç¤Ë¤Ï) Àµ¤·¤¤Ãͤ¬¡¢(¤½¤¦¤Ç¤Ê¤¤¾ì¹ç¤Ë¤Ï) 0.0 ¤¬ÊÖ¤µ¤ì¤ë¡£
129 ¤³¤ì¤é¤Î´Ø¿ô¤ò¸Æ¤Ó½Ð¤·¤¿ºÝ¤Ë¥¨¥é¡¼¤¬È¯À¸¤·¤¿¤«¤ÎȽÄêÊýË¡¤Ë¤Ä¤¤¤Æ¤Î¾ðÊó¤Ï
133 °Ê²¼¤Î¥¨¥é¡¼¤¬È¯À¸¤¹¤ë²ÄǽÀ¤¬¤¢¤ë¡£
135 ÈÏ°Ï¥¨¥é¡¼: ·ë²Ì¤Î¥ª¡¼¥Ð¡¼¥Õ¥í¡¼
136 .\" e.g., nextafter(DBL_MAX, HUGE_VAL);
140 ¥ª¡¼¥Ð¡¼¥Õ¥í¡¼ÉâÆ°¾®¿ôÅÀÎã³°
144 ÈÏ°Ï¥¨¥é¡¼: ·ë²Ì¤¬ÈóÀµµ¬²½¿ô¤«¥¢¥ó¥À¡¼¥Õ¥í¡¼
145 .\" e.g., nextafter(DBL_MIN, 0.0);
149 ¥¢¥ó¥À¡¼¥Õ¥í¡¼ÉâÆ°¾®¿ôÅÀÎã³°
156 .\" FIXME . Is it intentional that these functions do not set errno?
157 .\" Bug raised: http://sources.redhat.com/bugzilla/show_bug.cgi?id=6799
160 ¤³¤Î´Ø¿ô¤Ï IEC 559 ¤ÇÄêµÁ¤µ¤ì¤Æ¤¤¤ë¡£
161 (¤Þ¤¿ IEEE 754/IEEE 854 ¤Ç¤ÏÉÕÏ¿¤Ç¿ä¾©´Ø¿ô¤È¤·¤ÆÄêµÁ¤µ¤ì¤Æ¤¤¤ë)
163 glibc ¥Ð¡¼¥¸¥ç¥ó 2.5 °ÊÁ°¤Ç¤Ï¡¢¥¢¥ó¥À¡¼¥Õ¥í¡¼¤¬È¯À¸¤·¤¿ºÝ¤Ë¡¢
164 ¤³¤ì¤é¤Î´Ø¿ô¤Ï¥¢¥ó¥À¡¼¥Õ¥í¡¼ÉâÆ°¾®¿ôÅÀÎã³°