4.3BSD - /usr/man/cat3/qsort.0

QSORT(3F)                                                            QSORT(3F)


NAME
       qsort - quick sort

SYNOPSIS
       subroutine qsort (array, len, isize, compar)
       external compar
       integer*2 compar

DESCRIPTION
       One  dimensional  array contains the elements to be sorted.  len is the
       number of elements in the array.  isize is the size of an element, typ‐
       ically -

            4 for integer and real
            8 for double precision or complex
            16 for double complex
            (length of character object) for character arrays

       Compar  is  the  name  of  a user supplied integer*2 function that will
       determine the sorting order.  This function will be called with 2 argu‐
       ments that will be elements of array.  The function must return -

            negative if arg 1 is considered to precede arg 2
            zero if arg 1 is equivalent to arg 2
            positive if arg 1 is considered to follow arg 2

       On return, the elements of array will be sorted.

FILES
       /usr/lib/libU77.a

SEE ALSO
       qsort(3)


4.2 Berkeley Distribution        May 15, 1985                        QSORT(3F)