[gameprogrammer] Linux _findfirst equivalent

This code is supposed to add all non-hidden files and files in subdirectories from applicationDirectory/subDirectory through the member function AddFile

Linux doesn't know what _findfirst is though.  Any ideas?

FileList.cpp: In member function `void FileList::AddFilesFromDirectory(const char*, const char*, bool)':
FileList.cpp:73: error: `_finddata_t' undeclared (first use this function)
FileList.cpp:73: error: (Each undeclared identifier is reported only once for each function it appears in.)
FileList.cpp:73: error: expected `;' before "fileInfo"
FileList.cpp:111: error: `fileInfo' undeclared (first use this function)
FileList.cpp:111: error: `_findfirst' undeclared (first use this function)
FileList.cpp:114: error: `_findclose' undeclared (first use this function)
FileList.cpp:121: error: `_findnext' undeclared (first use this function)
FileList.cpp:126: error: `_A_HIDDEN' undeclared (first use this function)
FileList.cpp:126: error: `_A_SUBDIR' undeclared (first use this function)
FileList.cpp:126: error: `_A_SYSTEM' undeclared (first use this function)

void FileList::AddFilesFromDirectory(const char *applicationDirectory, const char *subDirectory, bool writeHashInsteadOfData)
{
DataStructures::Queue<char*> dirList;
char root[260];
char fullPath[520];
_finddata_t fileInfo;
intptr_t dir;
int file;
FILE *fp;
CSHA1 sha1;
char *dirSoFar, *fileData;
dirSoFar=new char[520];

        if (applicationDirectory)
                strcpy(root, applicationDirectory);
        else
                root[0]=0;

int rootLen=(int)strlen(root);
if (rootLen)
{
strcpy(dirSoFar, root);
if (dirSoFar[strlen(dirSoFar)-1]!='/' && dirSoFar[strlen(dirSoFar)-1]!='\\')
{
strcat(dirSoFar, "/");
rootLen++;
}
}
else
dirSoFar[0]=0;

if (subDirectory)
{
strcat(dirSoFar, subDirectory);
if (dirSoFar[strlen(dirSoFar)-1]!='/' && dirSoFar[strlen(dirSoFar)-1]!='\\')
strcat(dirSoFar, "/");
}
dirList.Push(dirSoFar);
while (dirList.Size())
{
dirSoFar=dirList.Pop();
strcpy(fullPath, dirSoFar);
strcat(fullPath, "*.*");
dir=_findfirst(fullPath, &fileInfo ); // .
if (dir==-1)
{
_findclose(dir);
delete [] dirSoFar;
unsigned i;
for (i=0; i < dirList.Size(); i++)
delete [] dirList[i];
return;
}
file=_findnext(dir, &fileInfo ); // ..
file=_findnext(dir, &fileInfo );

                while (file!=-1)
                {
                        if ((fileInfo.attrib & (_A_HIDDEN | _A_SUBDIR | 
_A_SYSTEM))==0)
                        {
                                strcpy(fullPath, dirSoFar);
                                strcat(fullPath, fileInfo.name);
                                fileData= new char [fileInfo.size];
                                fp = fopen(fullPath, "rb");
                                fread(fileData, fileInfo.size, 1, fp);
                                fclose(fp);

if (writeHashInsteadOfData)
{
sha1.Reset();
sha1.Update( ( unsigned char* ) fileData, fileInfo.size );
sha1.Final();
AddFile((const char*)fullPath+rootLen, (const char*)sha1.GetHash(), 20, fileInfo.size);
}
else
{
AddFile(fullPath+rootLen, fileData, fileInfo.size, fileInfo.size);
}

delete [] fileData;
}
else if ((fileInfo.attrib & _A_SUBDIR) && (fileInfo.attrib & (_A_HIDDEN | _A_SYSTEM))==0)
{
char *newDir=new char[520];
strcpy(newDir, dirSoFar);
strcat(newDir, fileInfo.name);
strcat(newDir,"/");
dirList.Push(newDir);
}
file=_findnext(dir, &fileInfo );
}

                _findclose(dir);
                delete [] dirSoFar;
        }
}


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