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-'\" t
-.\" Copyright 1993 David Metcalfe (david@prism.demon.co.uk)
-.\"
-.\" SPDX-License-Identifier: Linux-man-pages-copyleft
-.\"
-.\" References consulted:
-.\"     Linux libc source code
-.\"     Lewine's _POSIX Programmer's Guide_ (O'Reilly & Associates, 1991)
-.\"     386BSD man pages
-.\" Modified Mon Mar 29 22:41:16 1993, David Metcalfe
-.\" Modified Sat Jul 24 21:35:16 1993, Rik Faith (faith@cs.unc.edu)
-.TH bsearch 3 (date) "Linux man-pages (unreleased)"
-.SH NAME
-bsearch \- binary search of a sorted array
-.SH LIBRARY
-Standard C library
-.RI ( libc ", " \-lc )
-.SH SYNOPSIS
-.nf
-.B #include <stdlib.h>
-.P
-.BI "void *bsearch(const void " key [. size "], \
-const void " base [. size " * ." nmemb ],
-.BI "              size_t " nmemb ", size_t " size ,
-.BI "              int (*" compar ")(const void [." size "], \
-const void [." size ]));
-.fi
-.SH DESCRIPTION
-The
-.BR bsearch ()
-function searches an array of
-.I nmemb
-objects,
-the initial member of which is pointed to by
-.IR base ,
-for a member
-that matches the object pointed to by
-.IR key .
-The size of each member
-of the array is specified by
-.IR size .
-.P
-The contents of the array should be in ascending sorted order according
-to the comparison function referenced by
-.IR compar .
-The
-.I compar
-routine is expected to have two arguments which point to the
-.I key
-object and to an array member, in that order, and should return an integer
-less than, equal to, or greater than zero if the
-.I key
-object is found,
-respectively, to be less than, to match, or be greater than the array
-member.
-.SH RETURN VALUE
-The
-.BR bsearch ()
-function returns a pointer to a matching member of the
-array, or NULL if no match is found.
-If there are multiple elements that
-match the key, the element returned is unspecified.
-.SH ATTRIBUTES
-For an explanation of the terms used in this section, see
-.BR attributes (7).
-.TS
-allbox;
-lbx lb lb
-l l l.
-Interface	Attribute	Value
-T{
-.na
-.nh
-.BR bsearch ()
-T}	Thread safety	MT-Safe
-.TE
-.SH STANDARDS
-C11, POSIX.1-2008.
-.SH HISTORY
-POSIX.1-2001, C89, C99, SVr4, 4.3BSD.
-.SH EXAMPLES
-The example below first sorts an array of structures using
-.BR qsort (3),
-then retrieves desired elements using
-.BR bsearch ().
-.P
-.\" SRC BEGIN (bsearch.c)
-.EX
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-\&
-#define ARRAY_SIZE(arr)  (sizeof((arr)) / sizeof((arr)[0]))
-\&
-struct mi {
-    int         nr;
-    const char  *name;
-};
-\&
-static struct mi  months[] = {
-    { 1, "jan" }, { 2, "feb" }, { 3, "mar" }, { 4, "apr" },
-    { 5, "may" }, { 6, "jun" }, { 7, "jul" }, { 8, "aug" },
-    { 9, "sep" }, {10, "oct" }, {11, "nov" }, {12, "dec" }
-};
-\&
-static int
-compmi(const void *m1, const void *m2)
-{
-    const struct mi *mi1 = m1;
-    const struct mi *mi2 = m2;
-\&
-    return strcmp(mi1\->name, mi2\->name);
-}
-\&
-int
-main(int argc, char *argv[])
-{
-    qsort(months, ARRAY_SIZE(months), sizeof(months[0]), compmi);
-    for (size_t i = 1; i < argc; i++) {
-        struct mi key;
-        struct mi *res;
-\&
-        key.name = argv[i];
-        res = bsearch(&key, months, ARRAY_SIZE(months),
-                      sizeof(months[0]), compmi);
-        if (res == NULL)
-            printf("\[aq]%s\[aq]: unknown month\en", argv[i]);
-        else
-            printf("%s: month #%d\en", res\->name, res\->nr);
-    }
-    exit(EXIT_SUCCESS);
-}
-.EE
-.\" SRC END
-.SH SEE ALSO
-.BR hsearch (3),
-.BR lsearch (3),
-.BR qsort (3),
-.BR tsearch (3)