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#ifndef PAGEDIR_H
#define PAGEDIR_H
typedef int bool;
#define false 0
#define true 1
/* Returns true iff 'adr' contains a null-character ('\0'). */
bool is_end_of_string(char* adr);
/* Returns the start address of the page that contains 'adr'. */
void* pg_round_down(const void* adr);
/* Returns the page number of the page that contains 'adr'.
* Page numbers are counted with start at zero (0).
*/
unsigned pg_no(const void* adr);
/* Uses the page table to translate from logic to physical
* address. Returns NULL if the translation fail.
*
* The first parameter specify the top level page table to
* use. Normally you will find it in the structure corresponding
* to your operating systems PCB (Process Control Block).
*/
void *pagedir_get_page (void *pagetable, const void *adr);
/* Page size: The number of bytes in each page. */
#define PGSIZE 100
/* Functions used to simulate a paging system and testing your
* solution. */
void start_evaluate_algorithm(void* start, int size);
void evaluate(bool result);
void end_evaluate_algorithm();
/* Let us decide how costly a simulated page fault is in terms of
* time. Does not exist in Pintos. Set to zero (0) for faster
* testing. */
void simulator_set_pagefault_time(unsigned i);
#endif
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