#include "dbtproj.h"
#include <cstdlib>
#include <cstring>
#include <cstdio>
using namespace std;

int main(int argc, char** argv) {

	int nblocks = 3;	// number of blocks in the file
	record_t record;	
	block_t block;
	unsigned int recid = 0;
	FILE *infile, *outfile;
	
	// generate a file 
	outfile = fopen("file.bin", "w");
	
	for (int b=0; b<nblocks; ++b) { // for each block
		
		block.blockid = b;
		for (int r=0; r<MAX_RECORDS_PER_BLOCK; ++r) { // for each record
			
			// prepare a record
			record.recid = recid++;
			record.num = rand() % 1000;
			strcpy(record.str,"hello");   // put the same string to all records
			record.valid = true;
			
			memcpy(&block.entries[r], &record, sizeof(record_t)); // copy record to block
		}
		
		block.nreserved = MAX_RECORDS_PER_BLOCK;
		block.valid = true;
		
		fwrite(&block, 1, sizeof(block_t), outfile);	// write the block to the file
	}
	
	fclose(outfile);
	
	// open file and print contents
	infile = fopen("file.bin", "r");
	int nreserved;
	while (!feof(infile)) { // while end-of-file has not been reached ... 
	
		fread(&block, 1, sizeof(block_t), infile); // read the next block
		nreserved = block.nreserved;
		
		// print block contents
		for (int i=0; i<nreserved; ++i) {
			printf("this is block id: %d, record id: %d, num: %d, str: %s\n", 
					block.blockid, block.entries[i].recid, block.entries[i].num, block.entries[i].str);
		}
	}
	
	fclose(infile);
	
	return 0;
}