int Disp::insert(Disp *node)
{
if (NULL == _child) {
//first time insert
_child = new My570List();
if (NULL == _child) {
cerr << "malloc failed.\n";
return FALSE;
}
return _child->Append(node);
} else { //not first time, needs to strcmp to find out the right pos
My570ListElem *item = NULL;
Disp *dirnode = NULL;
for (item = _child->First(); item != NULL; item = _child->Next(item))
{
dirnode = (Disp *)item->Obj();
if (strcmp(node->_name, dirnode->_name) < 0) {
return _child->InsertBefore((void *)node, item);
}
}
//finish the for loop without return, means we get to the end
//just Append
return _child->Append(node);
}
}
void Disp::output(uint64_t bits)
{
printPre(bits);
cout << _name;
if (S_ISDIR(_type)) {
cout << "/";
}
if (_fail == 1) {
cout << "/";
}
cout << endl;
if (_child == NULL) {
return;
}
My570ListElem *item = NULL;
Disp *dp = NULL;
uint64_t subbits = bits;
for (item = _child->First(); item != NULL; item = _child->Next(item))
{
dp = (Disp *)item->Obj();
if (item == _child->Last()) {
subbits |= 1<<dp->_level;
}
dp->output(subbits);
}
}
/*
* Begin code I did not write.
* This code is derived after looking at the pseudo code in wikipedia: http://en.wikipedia.org/wiki/Dijkstra's_algorithm
*
*/
void mazesolvebyDijkstra() {
My570List *Dijkstralist=new My570List(); ///<push everything into a queue
for(int i=0; i<totalnumofrooms; i++) {
Rooms[i]->parent = NULL;
(void)Dijkstralist->Append((void*)Rooms[i]);
}
Rooms[startroomnum]->dist = 0; ///> distance from source to source
while(!Dijkstralist->Empty()) {
My570ListElem *elem = getMinDistRoom(Dijkstralist); ///complexity here is o(n);
struct Room* mindistroom = (struct Room*)(elem->Obj());
if(elem==NULL) {
fprintf(stderr,"(maze has no solution) :queu returned back NULL meaning que is empty\n");
exit(-1);
}
if(mindistroom->dist==INFINITY) {
break; ///< all remaining vertices are inaccessible from source.
}
Dijkstralist->Unlink(elem); ///remove min dist element from queue.
mindistroom->isvisited = true;
if(mindistroom->index==endroomnum) {
break;
}
for(int v=0; v<totalnumofrooms; v++) {
if(isConnected(mindistroom->index,Rooms[v]->index)) {
if(!Rooms[v]->isvisited) {
int alt = mindistroom->dist + AdjMatrix[mindistroom->index][v];
if(alt < Rooms[v]->dist) {
Rooms[v]->dist = alt;
Rooms[v]->parent = mindistroom;
}
}
}
}
}
Dijkstra_shortestpath_cost = 0;
struct Room* curroom = Rooms[endroomnum];
while(curroom->parent!=NULL) {
updateWallwithApple(curroom,curroom->parent); //the wall between cur room and its parent should be an apple.
curroom->apple = '@';
Dijkstra_shortestpath_cost += AdjMatrix[curroom->index][curroom->parent->index];
curroom = curroom->parent;
}
Rooms[startroomnum]->apple='@';///coz curroom->index == startroomnum
}
/*
* sort by time when insert
*/
int TransRecord::insertNode(TransNode *node)
{
int res = 0;
if (_list.Empty()) {
res = _list.Append((void *)node);
if (res == FALSE) {
cerr << "insertNode error. \n";
return FALSE;
}
return TRUE;
}
My570ListElem *item = NULL;
for (item = _list.First(); item != NULL; item = _list.Next(item))
{
if (node->_time == ((TransNode *)(item->Obj()))->_time)
{
cerr << "two transaction with same time.\n";
return FALSE;
}
if (node->_time < ((TransNode *)(item->Obj()))->_time)
{
res = _list.InsertBefore((void *)node, item);
if (res == FALSE) {
cerr << "error when insert node.\n";
return FALSE;
}
return TRUE;
}
}
//after for without return, means get to the end of list, just apprend.
res = _list.Append((void *)node);
if (res == FALSE) {
cerr << "insertNode error. \n";
return FALSE;
}
return TRUE;
}
void TransRecord::printRecord()
{
My570ListElem *item = NULL;
TransNode *node = NULL;
int balance = 0;
for (item = _list.First(); item != NULL; item = _list.Next(item))
{
node = (TransNode *)item->Obj();
if (node->_type == '+') {
balance += node->_amount;
} else if (node->_type == '-'){
balance -= node->_amount;
} else {
cerr << "error transaction type\n";
exit(-1);
}
printDate(node);
printDesc(node);
printAmount(node);
printBalance(balance);
}
}
int Disp::readin(char *dirname)
{
/*
* in order to distinguish the topdir and following subdir,
* use a static variable, tricky method.
*/
static int open_cnt = 0;
open_cnt++;
DIR *dir = opendir(dirname);
if (NULL == dir) {
if (open_cnt == 1) {
//open topdir failed, should exit program.
cerr << "error when open topdir: " << dirname << endl;
exit(-1);
} else {
//open subdir failed, no matter, treat it as empty, set the _fail
_fail = 1;
cerr << "error when open dir: " << dirname << endl;
return FALSE;
}
}
struct dirent * entry = NULL;
while ((entry = readdir(dir)) != NULL)
{
if (strcmp(entry->d_name, ".") == 0 ||
strcmp(entry->d_name, "..") == 0)
{
continue;
}
struct stat fs;
mode_t type;
string cur_name(entry->d_name);
string path(_path);
string new_path = path + "/" + cur_name;
if (0 == stat(new_path.c_str(), &fs)) {
type = fs.st_mode;
}
if (S_ISDIR(type) || S_ISREG(type))
{
int level = _level + 1;
Disp * node = new Disp(new_path.c_str(), entry->d_name, type, level);
if (NULL == node) {
cerr << "malloc failed.\n";
return FALSE;
}
insert(node);
}
}
//close the current dir before go into the subdir
closedir(dir);
//after read the current dir, we go through the dirs in it
//so, looks like recursively.
My570ListElem *it = NULL;
Disp *dt = NULL;
int res = 0;
if (_child == NULL) {
return TRUE;
}
for (it = _child->First(); it != NULL; it = _child->Next(it))
{
dt = (Disp *)it->Obj();
if (S_ISDIR(dt->_type)) {
res = dt->readin();
if (res == FALSE) {
cerr << "error readin." << dt->_path << endl;
}
}
}
return TRUE;
}
void readRndFile() {
///< OPEN THE FILE FIRST
FILE* fptr;
if(file==NULL) {
//meaning no file was specified and hence has to be read from stdin
fptr=stdin;
} else { ///< a valid file name is specified
ProcessFilenameFailure(file);
fptr = fopen(file, "rb");
if (fptr==0) {
fprintf (stderr,"Unable to open Rndfile %s\n",file);
exit (-1);
}
}
///Push all the walls into a list; ---------------------------------------------------------
int totalwalls = ((w-1)*h) + ((h-1)*w);
int minwallstoremove = (w*h)-1;
My570List *list=new My570List();
for(int i=0;i<totalwalls;i++) {
(void)list->Append((void*)Walls[i]);
}
#ifdef DEBUG1
///< to check what was pushed into the list really went in.
My570ListElem *elem=NULL;
for (elem=list->First(); elem != NULL; elem=list->Next(elem)) {
struct Wall *temp =(struct Wall*)(elem->Obj());
fprintf(stdout,"%d\n",temp->index);
}
#endif
///< -----------------------------------------------------------------------------------------
int iteration=1;
while(minwallstoremove!=0) {
int listlen = 0;
listlen = list->Length();
unsigned char buf[4] ;
if(fread (buf,1,4,fptr)!=4){
if(file==NULL)
fprintf(stderr,"Random input ran out of bytes\n");
else
fprintf(stderr,"Rnd input file: %s ran out of bytes\n",file);
exit(-1);
}
///////TODO: mark the ones removed as "has been inspected!!"
unsigned int rmwallnum=0;
memcpy(&rmwallnum, buf, 4);
int walltopushtolist = rmwallnum % (list->Length());
/*
My570ListElem *elem = list->Find((void*)Walls[walltopushtolist]);
if(elem==NULL) {
fprintf(stderr,"Elem popped from list is NULL \n");
exit(-1);
}
*/
///< Iterate to the random number'th element in the list and unlink it first.
My570ListElem *elem = NULL;
elem=list->First();
struct Wall *temp =(struct Wall*)(elem->Obj());
for (int i=0;i<walltopushtolist;i++){
elem=list->Next(elem);
temp =(struct Wall*)(elem->Obj());
}
///< TO CHECK> should the wall be inspected if it is to be removed again?
list->Unlink(elem);
TWOROOMS pairofroom = getAdjacentRooms(temp);
#ifdef DEBUG1
if(temp->isvertical)
fprintf(stdout,"[room:%d][%d|]room:%d]",pairofroom.room1->index,temp->index,pairofroom.room2->index);
else
fprintf(stdout,"[room:%d][%d--]room:%d]",pairofroom.room1->index,temp->index,pairofroom.room2->index);
fprintf(stdout,"\n");
#endif
if(isUnion(pairofroom.room1,pairofroom.room2)) {
#ifdef DEBUG0
fprintf(stdout,"iteration:%d \t Listlen:%d \t R:%d \taction: wall not removed %d\n",iteration,listlen,walltopushtolist,temp->index);
#endif
} else {
minwallstoremove--;
temp->isremoved=true;
#ifdef DEBUG0
fprintf(stdout,"iteration:%d \t Listlen:%d \t R:%d \taction: remove wall %d\n",iteration,listlen,walltopushtolist,temp->index);
#endif
if(infoFlag){
fprintf(stdout,"Wall %d removed.\n",temp->index);
}
}
///This operation is done only if the wall is removable else you dont decrement it..
iteration++;
}
}
