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Man Pages
long_long_cmp(3) FreeBSD Library Functions Manual long_long_cmp(3)

#include <xtend/math.h>
-lxtend

int     long_long_cmp(const long long *n1, const long long *n2)

n1, n2  Pointers to two long long values

This is a function that compares two long longs as a service to polymorphic functions such as qsort(3), bsearch(3), etc. The address of long_long_cmp() is passed as an argument to perform the data type specific comparison on behalf of the sort of search function.

A value > 0 if *n1 is greater than *n2 A value < 0 if *n1 is less than *n2 0 if the values are equal

long long  list[LIST_SIZE];
// sizeof(*list) will continue to work if we change the data type
// We'll still need to change the cmp function, though
qsort(list, LIST_SIZE, sizeof(*list),
      (int (*)(const void *, const void *))long_long_cmp);

qsort(3), heapsort(3), mergesort(3), bsearch(3)


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