How can I find the size of all files located inside a folder?

Question

Is there any API in c++ for getting the size of a specified folder?

If not, how can I get the total size of a folder including all subfolders and files?

Answer 1

//use FAT32   
#undef UNICODE        // to flag window deactive unicode
#include  //to use windows api
#include
#include
#include
#include
#include
using namespace std;
#pragma pack(1)  //tell compiler do'nt do prag
struct BPB
{
BYTE            JMP[3];
BYTE            OEM[8];
WORD            NumberOfBytesPerSector;
BYTE            NumberOfSectorsPerCluster;
WORD            NumberOfReservedSectors;
BYTE            NumberOfFATs;
WORD            NumberOfRootEntries16;
WORD            LowNumbferOfSectors;
BYTE            MediaDescriptor;
WORD            NumberOfSectorsPerFAT16;
WORD            NumberOfSectorsPerTrack;
WORD            NumberOfHeads;
DWORD           NumberOfHiddenSectors;
DWORD           HighNumberOfSectors;

DWORD           NumberOfSectorsPerFAT32;
WORD            Flags;
WORD            FATVersionNumber;
DWORD           RootDirectoryClusterNumber;
WORD            FSInfoSector;
WORD            BackupSector;
BYTE            Reserver[12];
BYTE            BiosDrive;
BYTE            WindowsNTFlag;
BYTE            Signature;
DWORD           VolumeSerial;
BYTE            VolumeLabel[11];
BYTE            SystemID[8];
BYTE            CODE[420];
WORD            BPBSignature;
};
//-----------------------------------------------------------
struct DirectoryEntry
{
BYTE Name[11];
BYTE Attributes;
BYTE Reserved;
BYTE CreationTimeTenth;
WORD CreationTime;
WORD CreationDate;
WORD LastAccessTime;
WORD HiClusterNumber;
WORD WriteTime;
WORD WriteDate;
WORD LowClusterNumber;
DWORD FileSize;   //acual size of file
};
//---------------------------------------------------
void dirFunction(string s){
string path = "\\\\.\\" + s + ":";
HANDLE hFile = CreateFile(path.c_str(), GENERIC_READ|GENERIC_WRITE,
    FILE_SHARE_WRITE, 0, OPEN_EXISTING, 0, 0);//open partition 
BPB bootSector;//var from bootSector structure
DWORD readBytes = 0;
if (hFile == INVALID_HANDLE_VALUE)
{
    cout << "Error " << GetLastError()<" ;
    }else{

        cout<<"\t" ;
    }
    clusterNumber = root[i].HiClusterNumber << 16;
    clusterNumber |= root[i].LowClusterNumber;
    cout <<"\t"< example E or G\n\n";
cin>>directory;
string path = "\\\\.\\" + directory + ":";
cout<<"current directory is "<>swich_value;

if(swich_value.at(1)!='i')
    cin>>file_name;
string answer;
switch(swich_value.at(1)){  
case 'i':
    dirFunction(directory);
    cout<<"\nare  you want to do another process: y or n?";
    cin>>answer;
    if (answer.at(0)=='y')
        goto again;
    break;
case 'y':
    typeFunction(removeExtention(file_name), directory);
    cout<<"\nare  you want to do another process: y or n?";
    cin>>answer;
    if (answer.at(0)=='y')
        goto again;
    break;
case 'e':
    delFunction(removeExtention(file_name), directory);
    cout<<"\nare  you want to do another process: y or n?";
    cin>>answer;
    if (answer.at(0)=='y')
        goto again;
    break;


}
}