qsort(3) [osf1 man page]

qsort(3)						     Library Functions Manual							  qsort(3)

NAME

       qsort - Sorts a table in place

LIBRARY

       Standard C Library (libc.so, libc.a)

SYNOPSIS

       #include <stdlib.h>

       void qsort(
	       void *base,
	       size_t nmemb,
	       size_t size,
	       int (*compar) (const void *, const void *));

STANDARDS

       Interfaces documented on this reference page conform to industry standards as follows:

       qsort():  XPG4, XPG4-UNIX

       Refer to the standards(5) reference page for more information about industry standards and associated tags.

PARAMETERS

       Points  to  the	first entry in the table.  Specifies the number of entries in the table.  Specifies the size in bytes of each table entry.
       Points to the user-specified function to be used to compare pairs of table elements.  The comparison  function  will  be  called  with  two
       parameters  that  point	to the two elements to be compared. The comparison function must return an integer less than, equal to, or greater
       than zero, depending on whether the first element in the comparison is considered less than, equal to, or greater than the second element.

DESCRIPTION

       The qsort() function sorts a table having a specified number of entries. The contents of the table are sorted in ascending order  according
       to a user-specified comparison function (the strcmp() function, for example).

NOTES

       The  comparison	function  need	not compare every byte, so arbitrary data may be contained in the elements in addition to the values being
       compared.

       When two members compare equal, their order in the sorted array is indeterminate.

RELATED INFORMATION

       Functions: bsearch(3), lsearch(3)

       Standards: standards(5) delim off

																	  qsort(3)

bsearch(3)						     Library Functions Manual							bsearch(3)

NAME

       bsearch - Performs a binary search

LIBRARY

       Standard C Library (libc)

SYNOPSIS

       #include <stdlib.h>

       void *bsearch(
	   const void *key,
	   const void *base,
	   size_t nmemb,
	   size_t size,
	   int (*compar)(const void *, const void *));

STANDARDS

       Interfaces documented on this reference page conform to industry standards as follows:

       bsearch(): XSH5.0

       Refer to the standards(5) reference page for more information about industry standards and associated tags.

PARAMETERS

       Target  of  search.  Points to the initial object in the array.	Specifies the number of elements in the array.	Specifies the byte size of
       each element of the array.  Points to the comparison function, which is called with two parameters that point to the key object and  to	an
       array member, in that order.

DESCRIPTION

       The bsearch() function does a binary search and returns a pointer in an array that indicates where an object is found.

       The  compar  comparison	function  is  called with two parameters that point to objects that are compared during the search.  This function
       returns an integer less than, equal to, or greater than 0 (zero) depending whether the object pointed to by the key parameter is considered
       to be less than, equal to, or greater than the array element.

NOTES

       [Tru64 UNIX]  The bsearch() function is reentrant, but care should be taken to ensure that the function supplied as argument compar is also
       reentrant.

RETURN VALUES

       Upon successful completion, the bsearch() function returns a pointer to a matching object in the array.	A NULL is returned when  no  match
       is found.  When two or more objects compare equally, the returned object is unspecified.

RELATED INFORMATION

       Functions: hsearch(3), lsearch(3), qsort(3), tsearch(3)

       Standards: standards(5) delim off

																	bsearch(3)