Translate a 32-bit virtual (hexadecimal) address and produce its corresponding page number and page offset for a system with 8-KB pages.

translate_address.c

#include <stdlib.h>
#include <stdio.h>
 
#define PAGE_SIZE 8192
 
/*
 * main
 *
 * Translate a 32-bit virtual (hexadecimal) address and produce
 * its corresponding page number and page offset for a system
 * with 8-KB pages.
 *
 * @param {Integer} argc
 * @param {Character} argv
 * @return {Integer} 1 | 0
 *
 * Example 7.28 p. 314
 *
 *  ./a.out 0x4E12 (19986)
 *  page number: 0x4 (4)
 *  page offset: 0xe12 (3602)
 */
 
int main (int argc, char *argv[])
{
  unsigned logical_address, page_number, page_offset;
 
  // invalid num arguments handler
  if (argc != 2)
  {
    printf("translate_address.c accepts 1 command-line argument\n");
    exit(1);
  }
 
  // convert hexadecimal logical address to its integer equivalent
  sscanf(argv[1], "%x", &logical_address);
 
  // compute the page number
  page_number = logical_address / (PAGE_SIZE / 2);
 
  // compute the page offset
  page_offset = logical_address - page_number * (PAGE_SIZE / 2);
 
  // log page number hex
  printf("page number: 0x%x\n", page_number);
 
  // log page offset hex
  printf("page offset: 0x%x\n", page_offset);
 
  return 0;
}