[SOLVED] CS algorithm /* Reads a 128 kB file onto the stack and sorts the bytes in

/* Reads a 128 kB file onto the stack and sorts the bytes in
it, using quick sort, a multi-pass divide and conquer
algorithm.The sorted data is written back to the same file
in-place. */

#include
#include
#include tests/lib.h
#include tests/main.h
#include tests/vm/qsort.h

const char *test_name = child-qsort;

int
main (int argc UNUSED, char *argv[])
{
int handle;
unsigned char buf[128 * 1024];
size_t size;

quiet = true;

CHECK ((handle = open (argv[1])) > 1, open %s, argv[1]);

size = read (handle, buf, sizeof buf);
qsort_bytes (buf, sizeof buf);
seek (handle, 0);
write (handle, buf, size);
close (handle);

return 72;
}