(split) LDP_man-pages: release ioctl.2 [JM:00378]

[linuxjm/LDP_man-pages.git] / draft / man3 / strverscmp.3

.\" Copyright (C) 2001 Andries Brouwer <aeb@cwi.nl>
.\"
.\" Permission is granted to make and distribute verbatim copies of this
.\" manual provided the copyright notice and this permission notice are
.\" preserved on all copies.
.\"
.\" Permission is granted to copy and distribute modified versions of this
.\" manual under the conditions for verbatim copying, provided that the
.\" entire resulting derived work is distributed under the terms of a
.\" permission notice identical to this one.
.\"
.\" Since the Linux kernel and libraries are constantly changing, this
.\" manual page may be incorrect or out-of-date.  The author(s) assume no
.\" responsibility for errors or omissions, or for damages resulting from
.\" the use of the information contained herein.  The author(s) may not
.\" have taken the same level of care in the production of this manual,
.\" which is licensed free of charge, as they might when working
.\" professionally.
.\"
.\" Formatted or processed versions of this manual, if unaccompanied by
.\" the source, must acknowledge the copyright and authors of this work.
.\"
.\" Japanese Version Copyright (c) 2002 Akihiro MOTOKI
.\"         all rights reserved.
.\" Translated Sat Sep 21 08:34:42 2002
.\"         by Akihiro MOTOKI <amotoki@dd.iij4u.or.jp>
.\"
.TH STRVERSCMP 3  2001-12-19 "GNU" "Linux Programmer's Manual"
.\"O .SH NAME
.SH ̾Á°
.\"O strverscmp \- compare two version strings
strverscmp \- 2¤Ä¤Î¥Ð¡¼¥¸¥ç¥óʸ»úÎó¤òÈæ³Ó¤¹¤ë
.\"O .SH SYNOPSIS
.SH ½ñ¼°
.nf
.\"O .BR "#define _GNU_SOURCE" "         /* See feature_test_macros(7) */"
.BR "#define _GNU_SOURCE" "         /* feature_test_macros(7) »²¾È */"
.br
.B #include <string.h>
.sp
.BI "int strverscmp(const char *" s1 ", const char *" s2 );
.fi
.\"O .SH DESCRIPTION
.SH ÀâÌÀ
.\"O Often one has files
.\"O .IR jan1 ", " jan2 ", ..., " jan9 ", " jan10 ", ..."
.\"O and it feels wrong when
.\"O .BR ls (1)
.\"O orders them
.\"O .IR jan1 ", " jan10 ", ..., " jan2 ", ..., " jan9 .
.IR jan1 ", " jan2 ", ..., " jan9 ", " jan10 ", ..."
¤È¤¤¤Ã¤¿Ì¾Á°¤Î¥Õ¥¡¥¤¥ë¤¬¤¢¤ë¾õ¶·¤Ï¤è¤¯¤¢¤ë¤¬¡¢
.BR ls (1)
¤ò¼Â¹Ô¤·¤¿¤È¤­¤Ë
.IR jan1 ", " jan10 ", ..., " jan2 ", ..., " jan9
¤Î½çÈÖ¤Çɽ¼¨¤µ¤ì¤ë¤Î¤Ë¤Ï°ãÏ´¶¤¬¤¢¤ë¡£
.\"O .\" classical solution: "rename jan jan0 jan?"
.\" ¤³¤ì¤Þ¤Ç¤Î²ò·èÊýË¡: "rename jan jan0 jan?"
.\"O In order to rectify this, GNU introduced the
.\"O .I \-v
.\"O option to
.\"O .BR ls (1),
.\"O which is implemented using
.\"O .BR versionsort (3),
.\"O which again uses
.\"O .BR strverscmp ().
¤³¤ì¤ò½¤Àµ¤¹¤ë¤¿¤á¤Ë¡¢GNU ¤Ï
.BR ls (1)
¤Ë
.I \-v
¥ª¥×¥·¥ç¥ó¤òƳÆþ¤·¤¿¡£
¤³¤Îµ¡Ç½¤Ï
.BR versionsort (3)
¤ò»È¤Ã¤Æ¼ÂÁõ¤µ¤ì¤Æ¤¤¤ë¤¬¡¢¤³¤ÎÃæ¤Ç
.BR strverscmp ()
¤¬»ÈÍѤµ¤ì¤Æ¤¤¤ë¡£

.\"O Thus, the task of
.\"O .BR strverscmp ()
.\"O is to compare two strings and find the "right" order, while
.\"O .BR strcmp (3)
.\"O only finds the lexicographic order.
.\"O This function does not use
.\"O the locale category
.\"O .BR LC_COLLATE ,
.\"O so is meant mostly for situations
.\"O where the strings are expected to be in ASCII.
¤³¤Î¤è¤¦¤Ë
.BR strverscmp ()
¤ÎÌòÌܤÏ2¤Ä¤Îʸ»úÎó¤òÈæ³Ó¤·¤Æ¡ÖÀµ¤·¤¤¡×½ç½ø¤òõ¤¹¤³¤È¤Ç¤¢¤ë¡£
¤³¤ì¤ËÂФ·¤Æ
.BR strcmp (3)
¤Ï¼­½ñ½ç¤ÇÈæ³Ó¤·¤¿·ë²Ì¤òÊÖ¤¹¤À¤±¤Ç¤¢¤ë¡£
´Ø¿ô
.BR strverscmp ()
¤Ï¥í¥±¡¼¥ë¤Î¥«¥Æ¥´¥ê¤Ç¤¢¤ë
.B LC_COLLATE
¤ò»ÈÍѤ·¤Ê¤¤¡£
¤³¤Î¤³¤È¤«¤é¡¢¤³¤Î´Ø¿ô¤¬¼ç¤Ë¥¢¥¹¥­¡¼Ê¸»ú¤«¤éÀ®¤ëʸ»úÎó¤ò
ÁÛÄꤷ¤Æ¤¤¤ë¤³¤È¤¬Ê¬¤«¤ë¡£

.\"O What this function does is the following.
¤³¤Î´Ø¿ô¤ÎÆ°ºî¤Ï°Ê²¼¤ÎÄ̤ê¤Ç¤¢¤ë¡£
.\"O If both strings are equal, return 0.
.\"O Otherwise find the position
.\"O between two bytes with the property that before it both strings are equal,
.\"O while directly after it there is a difference.
ξÊý¤Îʸ»úÎó¤¬Åù¤·¤¤¾ì¹ç¡¢0 ¤òÊÖ¤¹¡£
¤½¤ì°Ê³°¤Î¾ì¹ç¡¢¤½¤ÎľÁ°¤Þ¤Ç¤ÏξÊý¤Îʸ»úÎó¤¬Åù¤·¤¯¡¢
¤½¤Îľ¸å¤Î¥Ð¥¤¥È¤Çξ¼Ô¤Ë°ã¤¤¤¬¤¢¤ë¤è¤¦¤Ê¡¢¥Ð¥¤¥È¤Î¶­³¦¤òõ¤¹¡£
.\"O Find the largest consecutive digit strings containing (or starting at,
.\"O or ending at) this position.
.\"O If one or both of these is empty,
¸«¤Ä¤«¤Ã¤¿¥Ð¥¤¥È¶­³¦¤ò´Þ¤à¿ô»úÎó(¿ô»ú¤À¤±¤Îʸ»úÎó)¤ÎºÇĹ°ìÃ׸¡º÷¤ò¹Ô¤¦¡£
(¿ô»úÎó¤Ï¶­³¦¤«¤é»Ï¤Þ¤Ã¤Æ¤¤¤Æ¤â¡¢¶­³¦¤Ç½ª¤ï¤Ã¤Æ¤¤¤Æ¤â¤è¤¤)¡£
.\"O then return what
.\"O .BR strcmp (3)
.\"O would have returned (numerical ordering of byte values).
2¤Ä¤Îʸ»úÎ󤫤éÆÀ¤é¤ì¤¿¿ô»úÎó¤Î°ìÊý¤Þ¤¿¤ÏξÊý¤¬¶õ¤Ç¤¢¤ì¤Ð¡¢
.BR strcmp (3)
¤¬ÊÖ¤·¤¿·ë²Ì¤ò´Ø¿ô¤ÎÊÖ¤êÃͤȤ·¤ÆÊÖ¤¹¡£
¤¹¤Ê¤ï¤Á¡¢¥Ð¥¤¥ÈÃͤòÈæ³Ó¤·¤¿·ë²Ì¤òÊÖ¤¹¡£
.\"O Otherwise, compare both digit strings numerically, where digit strings with
.\"O one or more leading zeros are interpreted as if they have a decimal point
.\"O in front (so that in particular digit strings with more leading zeros
.\"O come before digit strings with fewer leading zeros).
¤½¤ì°Ê³°¤Î(¿ô»úÎó¤¬Î¾Êý¤È¤â¶õ¤Ç¤Ê¤¤)¾ì¹ç¡¢Î¾Êý¤Î¿ô»úÎó¤ò¿ô»ú½ç¤ÇÈæ³Ó¤¹¤ë¡£
¤³¤Î¤È¤­¡¢1¤Ä°Ê¾å¤Î 0 ¤¬ÀèƬ¤Ë¤¢¤ë¿ô»úÎó¤Ï¡¢Á°¤Ë¾®¿ôÅÀ¤¬¤Ä¤¤¤Æ¤¤¤ë¤â¤Î¤È
²ò¼á¤µ¤ì¤ë¡£(ÀèƬ¤Ë 0 ¤¬Â¿¤¯¤¢¤ë¿ô»úÎó¤Û¤ÉÁ°¤ËÍè¤ë¤³¤È¤Ë¤Ê¤ë)
.\"O Thus, the ordering is
.\"O .IR 000 ", " 00 ", " 01 ", " 010 ", " 09 ", " 0 ", " 1 ", " 9 ", " 10 .
¤³¤Î·ë²Ì¡¢½ç½ø¤Ï¼¡¤Î¤è¤¦¤Ë¤Ê¤ë:
.IR 000 ", " 00 ", " 01 ", " 010 ", " 09 ", " 0 ", " 1 ", " 9 ", " 10
.\"O .SH "RETURN VALUE"
.SH ÊÖ¤êÃÍ
.\"O The
.\"O .BR strverscmp ()
.\"O function returns an integer
.\"O less than, equal to, or greater than zero if \fIs1\fP
.\"O is found, respectively, to be earlier than, equal to,
.\"O or later than \fIs2\fP.
´Ø¿ô
.BR strverscmp ()
¤Ï¡¢¥¼¥í¤è¤ê¤â
1)¾®¤µ¤¤¡¢2)Åù¤·¤¤¡¢3)Â礭¤¤¤Î¤¤¤º¤ì¤«¤ÎÀ°¿ô¤òÊÖ¤¹¡£
¤½¤ì¤¾¤ì¤Ï¡¢\fIs1\fP ¤¬ \fIs2\fP ¤è¤ê¤â¡¢
1)¾®¤µ¤¤¡¢2)Åù¤·¤¤¡¢3)Â礭¤¤ ¤³¤È¤ò¼¨¤¹¡£
.\"O .SH "CONFORMING TO"
.SH ½àµò
.\"O This function is a GNU extension.
¤³¤Î´Ø¿ô¤Ï GNU ¤Ë¤è¤ë³ÈÄ¥¤Ç¤¢¤ë¡£
.\"O .SH "SEE ALSO"
.SH ´ØÏ¢¹àÌÜ
.BR rename (1),
.BR strcasecmp (3),
.BR strcmp (3),
.BR strcoll (3)