1 .\" Hey Emacs! This file is -*- nroff -*- source.
2 .\" Copyright 1993 Ulrich Drepper (drepper@karlsruhe.gmd.de)
3 .\" and Copyright 2008, Linux Foundation, written by Michael Kerrisk
4 .\" <mtk.manpages@gmail.com>
6 .\" This is free documentation; you can redistribute it and/or
7 .\" modify it under the terms of the GNU General Public License as
8 .\" published by the Free Software Foundation; either version 2 of
9 .\" the License, or (at your option) any later version.
11 .\" The GNU General Public License's references to "object code"
12 .\" and "executables" are to be interpreted as the output of any
13 .\" document formatting or typesetting system, including
14 .\" intermediate and printed output.
16 .\" This manual is distributed in the hope that it will be useful,
17 .\" but WITHOUT ANY WARRANTY; without even the implied warranty of
18 .\" MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 .\" GNU General Public License for more details.
21 .\" You should have received a copy of the GNU General Public
22 .\" License along with this manual; if not, write to the Free
23 .\" Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111,
26 .\" References consulted:
27 .\" SunOS 4.1.1 man pages
28 .\" Modified Sat Sep 30 21:52:01 1995 by Jim Van Zandt <jrv@vanzandt.mv.com>
29 .\" Remarks from dhw@gamgee.acad.emich.edu Fri Jun 19 06:46:31 1998
30 .\" Modified 2001-12-26, 2003-11-28, 2004-05-20, aeb
31 .\" 2008-09-02, mtk: various additions and rewrites
32 .\" 2008-09-03, mtk, restructured somewhat, in part after suggestions from
33 .\" Timothy S. Nelson <wayland@wayland.id.au>
35 .\" Japanese Version Copyright (c) 1998 George Momma,
36 .\" Copyright (c) 2001-2005 Yuichi SATO,
37 .\" and Copyright (c) 2008 Akihiro MOTOKI
38 .\" Translated 1998-05-23, George Momma <momma@wakhok.ac.jp>
39 .\" Updated & Modified 2001-10-15, Yuichi SATO <ysato@h4.dion.ne.jp>
40 .\" Updated & Modified 2002-01-03, Yuichi SATO
41 .\" Updated & Modified 2004-01-17, Yuichi SATO <ysato444@yahoo.co.jp>
42 .\" Updated & Modified 2005-01-10, Yuichi SATO
43 .\" Updated 2008-09-20, Akihiro MOTOKI <amotoki@dd.iij4u.or.jp>
45 .\"WORD: hash table ¥Ï¥Ã¥·¥å¥Æ¡¼¥Ö¥ë
46 .\"WORD: entry ¥¨¥ó¥È¥ê¡¼
47 .\"WORD: allocate ³ä¤êÅö¤Æ
48 .\"WORD: NUL-terminated ¥Ì¥ëʸ»ú \0 ¤Ç½ªÃ¼¤µ¤ì¤¿
49 .\"WORD: pointer ¥Ý¥¤¥ó¥¿
50 .\"WORD: character ʸ»ú·¿
53 .TH HSEARCH 3 2011-09-10 "GNU" "Linux Programmer's Manual"
55 hcreate, hdestroy, hsearch, hcreate_r, hdestroy_r,
56 hsearch_r \- ¥Ï¥Ã¥·¥å¥Æ¡¼¥Ö¥ë¤Î´ÉÍý
59 .B #include <search.h>
61 .BI "int hcreate(size_t " nel );
63 .BI "ENTRY *hsearch(ENTRY " item ", ACTION " action );
65 .B "void hdestroy(void);"
67 .BR "#define _GNU_SOURCE" " /* feature_test_macros(7) »²¾È */"
69 .B #include <search.h>
71 .BI "int hcreate_r(size_t " nel ", struct hsearch_data *" htab );
73 .BI "int hsearch_r(ENTRY " item ", ACTION " action ", ENTRY **" retval ,
74 .BI " struct hsearch_data *" htab );
76 .BI "void hdestroy_r(struct hsearch_data *" htab );
82 ¤Î 3 ¤Ä¤Î´Ø¿ô¤òÍøÍѤ¹¤ë¤È¡¢¥¡¼ (ʸ»úÎó) ¤ÈÂбþ¤¹¤ë¥Ç¡¼¥¿¤«¤é¹½À®¤µ¤ì¤ë
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105 .\" e.g., in glibc it is raised to the next higher prime number
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136 ´Ø¿ô¤Ï¡¢\fIitem\fP ¤ÈƱ¤¸¥¡¼¤ò»ý¤Ä¹àÌܤò¥Ï¥Ã¥·¥å¥Æ¡¼¥Ö¥ë¤«¤é
137 ¸¡º÷¤·¡¢¹àÌܤ¬¸«¤Ä¤«¤Ã¤¿¾ì¹ç¤Ë¤Ï¤½¤Î¹àÌܤؤΥݥ¤¥ó¥¿¤òÊÖ¤¹
142 °ú¤¿ô \fIitem\fP ¤Ï \fBENTRY\fP ·¿¤Ç¤¢¤ê¡¢\fI<search.h>\fP ¤ÎÃæ¤Ç
143 °Ê²¼¤Î¤è¤¦¤ËÄêµÁ¤µ¤ì¤Æ¤¤¤ë¡£
147 typedef struct entry {
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169 ¤Ï NULL ¤òÊÖ¤¹¤³¤È¤ò°ÕÌ£¤¹¤ë
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206 ¸«¤Ä¤«¤é¤Ê¤¤¾ì¹ç¤Ç¤¢¤ë¡£
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223 ¤Ï°Ê²¼¤ÎÍýͳ¤Ç¼ºÇÔ¤¹¤ë²ÄǽÀ¤¬¤¢¤ë¡£
231 ¤¬¥Æ¡¼¥Ö¥ëÆâ¤Ë¸«¤Ä¤«¤é¤º¡¢
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240 ¤¬¥Æ¡¼¥Ö¥ëÆâ¤Ë¸«¤Ä¤«¤é¤Ê¤«¤Ã¤¿¡£
242 POSIX.1-2001 ¤¬µ¬Äꤷ¤Æ¤¤¤ë¤Î¤Ï¡¢¥¨¥é¡¼
250 ¤Ï SVr4 ¤«¤éƳÆþ¤µ¤ì¤¿¤â¤Î¤Ç¡¢POSIX.1-2001 ¤Ëµ½Ò¤µ¤ì¤Æ¤¤¤ë¡£
255 ¤Ï GNU ¤Î³ÈÄ¥¤Ç¤¢¤ë¡£
257 Ä̾¥Ï¥Ã¥·¥å¥Æ¡¼¥Ö¥ë¤Î¼ÂÁõ¤Ï¡¢¾×ÆͤòºÇ¾®¸Â¤Ë¤¹¤ë¤¿¤á¤Ë
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271 ¤¬»Ø¤¹¥Ð¥Ã¥Õ¥¡¤ò²òÊü¤·¤Ê¤¤
272 (¤³¤ì¤¬¤Ç¤¤Ê¤¤¤Î¤Ï¡¢¤³¤ì¤é¤Î¥Ð¥Ã¥Õ¥¡¤¬Æ°Åª¤Ë³ä¤êÅö¤Æ¤é¤ì¤¿¤Î¤«¤ò
273 ÃΤ뤳¤È¤¬¤Ç¤¤Ê¤¤¤«¤é¤Ç¤¢¤ë)¡£
274 ¤³¤ì¤é¤Î¥Ð¥Ã¥Õ¥¡¤ò²òÊü¤¹¤ëɬÍפ¬¤¢¤ë¾ì¹ç¡¢
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276 Àߤ±¤Æ¡¢¤³¤ì¤ò´ÉÍý¤·¤Ê¤±¤ì¤Ð¤Ê¤é¤Ê¤¤
277 (²òÊü¤¬É¬ÍפȤʤëÍýͳ¤Ï¡¢¤¿¤¤¤Æ¤¤¤Ï¡¢¥×¥í¥°¥é¥à¼«¿È¤ÈÀ¸Â¸´ü´Ö¤¬Æ±¤¸
278 ¥Ï¥Ã¥·¥å¥Æ¡¼¥Ö¥ë¤ò°ì¤Ä¤À¤±ºîÀ®¤¹¤ë¤Î¤Ç¤Ï¤Ê¤¯¡¢¤½¤Î¥×¥í¥°¥é¥à¤Ç¤ÏÊ£¿ô¤Î
279 ¥Ï¥Ã¥·¥å¥Æ¡¼¥Ö¥ë¤ò·«¤êÊÖ¤·¤ÆºîÀ®¤·¤¿¤êÇË´þ¤·¤¿¤ê¤¹¤ë¤«¤é¤Ç¤¢¤í¤¦)¡£
281 SVr4 ¤È POSIX.1-2001 ¤Îµ¬Äê¤Ç¤Ï¡¢
282 \fIaction\fP ¤Ï¸¡º÷¤¬¼ºÇÔ¤·¤¿¤È¤¤Ë¤À¤±°ÕÌ£¤ò»ý¤Ä¤È¤Ê¤Ã¤Æ¤¤¤ë¡£
283 ¤è¤Ã¤Æ¡¢¸¡º÷¤¬À®¸ù¤·¤¿¾ì¹ç¡¢\fIaction\fP ¤ÎÃͤ¬ \fBENTER\fP ¤Ç¤â
285 (¥Ð¡¼¥¸¥ç¥ó 2.3 ¤è¤êÁ°¤Î) libc ¤È glibc ¤Î¼ÂÁõ¤Ï¤³¤Îµ¬³Ê¤Ë°ãÈ¿¤·¤Æ¤ª¤ê¡¢
286 ¤³¤Î¾õ¶·¤Ç¡¢»ØÄꤵ¤ì¤¿ \fIkey\fP ¤ËÂбþ¤¹¤ë \fIdata\fP ¤¬¹¹¿·¤µ¤ì¤ë¡£
288 ¥Ï¥Ã¥·¥å¥Æ¡¼¥Ö¥ë¥¨¥ó¥È¥ê¡¼¤ÎÄɲäϤǤ¤ë¤¬¡¢ºï½ü¤¬¤Ç¤¤Ê¤¤¡£
291 ¼¡¤Î¥×¥í¥°¥é¥à¤Ï¡¢¥Ï¥Ã¥·¥å¥Æ¡¼¥Ö¥ë¤Ë 24 ¸Ä¤Î¹àÌܤòÁÞÆþ¤·¡¢
292 ¤½¤ì¤«¤é¤½¤Î¤¦¤Á¤Î¤¤¤¯¤Ä¤«¤òɽ¼¨¤¹¤ë¡£
299 char *data[] = { "alpha", "bravo", "charlie", "delta",
300 "echo", "foxtrot", "golf", "hotel", "india", "juliet",
301 "kilo", "lima", "mike", "november", "oscar", "papa",
302 "quebec", "romeo", "sierra", "tango", "uniform",
303 "victor", "whisky", "x\-ray", "yankee", "zulu"
313 for (i = 0; i < 24; i++) {
315 /* ¥Ç¡¼¥¿¤Ï¡¢¥Ý¥¤¥ó¥¿¤Ç¤Ï¤Ê¤¯¡¢Ã±¤Ê¤ëÀ°¿ôÃͤǤ¢¤ë¡£ */
317 ep = hsearch(e, ENTER);
318 /* ¥¨¥é¡¼¤Ïµ¯¤³¤é¤Ê¤¤¤Ï¤º¤Ç¤¢¤ë¡£ */
320 fprintf(stderr, "entry failed\\n");
325 for (i = 22; i < 26; i++) {
326 /* ¥Æ¡¼¥Ö¥ë¤Ë¤¢¤ë 2 ¤Ä¤Î¥¨¥ó¥È¥ê¤òɽ¼¨¤·¡¢
327 ¤¢¤È¤Î 2 ¤Ä¤¬¥Æ¡¼¥Ö¥ë¤Ë¤Ê¤¤¤³¤È¤ò¼¨¤¹¡£ */
329 ep = hsearch(e, FIND);
330 printf("%9.9s \-> %9.9s:%d\\n", e.key,
331 ep ? ep\->key : "NULL", ep ? (int)(ep\->data) : 0);