#include<conio.h>

#include<stdio.h>

#include<io.h>

#include<string.h>

#include<dos.h>

unsigned seg,off;

int dish_num,sh_tep;

char far *p;

char sh_dia,tenthumuc[255];

int sofile=0,sofolder=0;

long unsigned abc=0;

struct structdir{

char dir_name;//khong dung

unsigned char Reserve[20];//khong co tac dung. de cho hop cau truc

unsigned char thuoctinh;

unsigned int file_time;

unsigned int file_date;

unsigned long size_tep;

char ten_tep[13];

}buffer;

void SetDTA(unsigned int buffer);

unsigned char file_first(char *ten_tep,unsigned int thuoctinh);

unsigned char file_next();

void display(struct structdir *buffer,char *tentep,unsigned char thuoctinh);

void get_dir();

void change_dir(char *tenthumuc);

void size_free(char sh_dia);

void mai(struct structdir *buffer)

{

clrscr();

printf("

");

get_dir();

printf("\>DIR ");

//printf("

%c:\\Dir ",sh_dia+65);

gets(tenthumuc);

change_dir(tenthumuc);

printf("

Directory of: ");

get_dir();

printf("

");

Dir(&buffer,"*.*",~0);

size_free(sh_dia);

getch();

}

//Dat vung chuyen du lieu dia

void SetDTA(unsigned int buffer) //disk tranfer address

{

union REGS v;

struct SREGS s;

segread(&s);//Dat noi dung thanh ghi doan vao cau truc s

v.h.ah=0x1A;//Dat DTA

v.x.dx=buffer;

intdosx(&v,&r,&s);

}

//Tim tep dau tien

unsigned char file_first(char *ten_tep,unsigned int thuoctinh)

{

union REGS v;

struct SREGS s;

segread(&s);

v.h.ah=0x4E;

v.x.cx=thuoctinh;

v.x.dx=(unsigned int)ten_tep;

intdosx(&v,&r,&s);

return(!v.x.cflag);

}

//Tim tep ke tiep

unsigned char file_next()

{

union REGS v;

v.h.ah=0x4F;

intdos(&v,&v);

return(!v.x.cflag);

}

//Xuat thong tin len man hinh

void display(struct structdir *buffer)

{

int i;

printf("%0.2d%0.2d%0.4d",(*buffer).file_date&31,(*buffer).file_date>>5&15,((*buffer).file_date>>9)+1980);

if((((*buffer).file_time>>11)&31)<=12)

printf("%0.2d:%0.2d AM",((*buffer).file_time>>11)&31,((*buffer).file_time>>5)&63);

else printf("%0.2d:%0.2d PM",(((*buffer).file_time>>11)&31)-12,(((*buffer).file_time>>5)&63));

if(((*buffer).thuoctinh>>4)&1) printf(" ");

else printf("%7lu ",(*buffer).size_tep);

abc+=(*buffer).size_tep;

for(i=0;(*buffer).ten_tep[i]&&i<15)

printf("%c",(*buffer).ten_tep[i++]));

printf("

");

}

//Lay thong tin tat ca cac file hoac folder trong thu muc hien hanh

void Dir(struct structdir *buffer,char *tentep,unsigned char thuoctinh)

{

SetDTA((unsigned int)&buffer);

if(file_first(tentep,thuoctinh))

{do

{display(&buffer);

++sofile;

}

while(file_next());

}

printf("

%11d File(s) %9lu bytes",sofile-sofoler,abc);

printf("

%ld Folder",sofolder);

}

//lay o dia va thu muc hien hanh

void get_dir()

{

union REGS v,r;

struct SREGS s;

int Odia;

//Lay o dia hien hanh

v.h.ah=0x19;

int86(0x21,&v.&r);

sh_dia=r.h.al;

Odia=r.h.al+65;

//doan lenh lay thu muc hien hanh

dish_num=0;

_DL=dish_num;

_AH=0x47;

geninterrupt(0x21);

seg=_DS;

off=_SI;

p=(char far*)MK_FP(seg,off);

printf("%c:\\%s ",Odia,p);

}

//Chuyen thu muc hien hanh

void change_dir(char *tenthumuc)

{

union REGS v,r;

struct STEGS s;

v.h.ah=0x3B;

v.x.dx=FP_OFF(tenthumuc);

s.ds=FP_SEG(tenthumuc);

int86x(0x21,&v,&r,&s);

}

void size_free(char sh_dia)

{

union REGS v,r;

unsigned long a,b,c,d;

//printf("

O dia hien thoi la %d",sh_dia);

v.h.ah=0x36;

v.h.dl=sh_dia;

int86(0x21,&v,&r);

a=r.x.ax;

b=r.x.bx;

c=r.x.cx;

d=r.x.dx;

//free=b*c*d;

//printf("

Tong so byte: %lu",a*c*d/1024);

printf("%9lu bytes free",b*c*d);

}