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NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ATTRIBUTES | CONFORMING TO | BUGS | SEE ALSO | COLOPHON |
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LSEARCH(3) Linux Programmer's Manual LSEARCH(3)
lfind, lsearch - linear search of an array
#include <search.h>
void *lfind(const void *key, const void *base, size_t *nmemb,
size_t size, int(*compar)(const void *, const void *));
void *lsearch(const void *key, void *base, size_t *nmemb,
size_t size, int(*compar)(const void *, const void *));
lfind() and lsearch() perform a linear search for key in the array
base which has *nmemb elements of size bytes each. The comparison
function referenced by compar is expected to have two arguments which
point to the key object and to an array member, in that order, and
which returns zero if the key object matches the array member, and
nonzero otherwise.
If lsearch() does not find a matching element, then the key object is
inserted at the end of the table, and *nmemb is incremented. In
particular, one should know that a matching element exists, or that
more room is available.
lfind() returns a pointer to a matching member of the array, or NULL
if no match is found. lsearch() returns a pointer to a matching
member of the array, or to the newly added member if no match is
found.
For an explanation of the terms used in this section, see
attributes(7).
┌───────────────────┬───────────────┬─────────┐
│Interface │ Attribute │ Value │
├───────────────────┼───────────────┼─────────┤
│lfind(), lsearch() │ Thread safety │ MT-Safe │
└───────────────────┴───────────────┴─────────┘
POSIX.1-2001, POSIX.1-2008, SVr4, 4.3BSD. Present in libc since
libc-4.6.27.
The naming is unfortunate.
bsearch(3), hsearch(3), tsearch(3)
This page is part of release 4.15 of the Linux man-pages project. A
description of the project, information about reporting bugs, and the
latest version of this page, can be found at
https://www.kernel.org/doc/man-pages/.
GNU 2017-09-15 LSEARCH(3)
Pages that refer to this page: bsearch(3), hsearch(3), tsearch(3)
Copyright and license for this manual page
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