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xt_double_cmp(3) Library Functions Manual xt_double_cmp(3) NAME xt_double_cmp() - Compare two doubles for qsort(3), bsearch(3), etc. LIBRARY #include <xtend/math.h> -lxtend SYNOPSIS int xt_double_cmp(const double *n1, const double *n2) ARGUMENTS n1, n2 Pointers to two double values DESCRIPTION This is a function that compares two doubles as a service to polymorphic functions such as qsort(3), bsearch(3), etc. The address of xt_dou- ble_cmp() is passed as an argument to perform the data type specific com- parison on behalf of the sort of search function. RETURN VALUES A value > 0 if *n1 is greater than *n2 A value < 0 if *n1 is less than *n2 0 if the values are equal EXAMPLES double 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 *))xt_double_cmp); SEE ALSO qsort(3), heapsort(3), mergesort(3), bsearch(3) xt_double_cmp(3)
NAME | LIBRARY | SYNOPSIS | ARGUMENTS | DESCRIPTION | RETURN VALUES | EXAMPLES | SEE ALSO
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