#define MAX_LINE 50

void printList(DlList_T list);

void showCursor(DlList_T myList);

struct node* getNext(DlList_T lst);

int getCursorNumber(DlList_T lst);

struct node* getPrevious(DlList_T lst);

struct node* getHead(DlList_T lst);

void printListForward(DlList_T lst);

struct node* nextNode(struct node* thisNode);

void* getData(struct node* thisNode);

bool file_exists(const char * filename)

{

FILE *fp = fopen(filename,"r");

if( fp ) {

return 1;

fclose(fp);

}

else {

return 0;

}

}

void startLookingforInput(DlList_T lst,const char * filename)

{

int hasChanged=0;

int looping=1;

char buff[MAX_LINE];

while(looping)

{

fgets(buff,MAX_LINE, stdin);

strtok(buff,"\n");

if(strcmp(buff,"Q")==0)

{

dll_destroy(lst);

break;

}

else if(strcmp(buff,".")==0)

{

showCursor(lst);

}

else if(strcmp(buff,"a")==0)

{

int currentlooping=1;

while(currentlooping)

{

fgets(buff,MAX_LINE, stdin);

strtok(buff,"\n");

if(strcmp(buff,".")==0)

{

break;

}

else

{

void* input=malloc(sizeof(char)*(strlen(buff)));

memcpy(input,buff,strlen(buff));

dll_append(lst, input);

dll_move_to(lst,dll_size(lst));

hasChanged=1;

//printf("SIZE %d\n",dll_size(lst) );

//showCursor(lst);

//printList(lst);

}

}

}

else if(strcmp(buff, "\n")==0 || strcmp(buff,"+")==0)

{

if(getNext(lst)!=NULL)

{

dll_move_to(lst,getCursorNumber(lst) +1);

}

else

{

printf("?\n" );

}

}

else if(strcmp(buff,"-")==0)

{

if(getPrevious(lst)!=NULL)

{

dll_move_to(lst,getCursorNumber(lst) -1);

}

}

else if(strcmp(buff,"$")==0)

{

if(getHead(lst)==NULL)

{

printf("?\n");

}

else

{

dll_move_to(lst,dll_size(lst));

showCursor(lst);

}

}

//NEEDS WORKS

else if(isdigit(buff))

{ printf("GOT HERE\n");

int newIndex=atoi(buff);

if(newIndex>=1 && newIndex<=dll_size(lst))

{

dll_move_to(lst,newIndex);

}

}

else if(strcmp(buff,".=")==0)

{

printf("%d\n",getCursorNumber(lst));

}

else if(strcmp(buff,"$=")==0)

{

printf("%d\n",dll_size(lst));

}

else if(strcmp(buff,"p")==0)

{

printListForward(lst);

dll_move_to(lst,dll_size(lst));

}

else if(strcmp(buff,"q")==0)

{

if(hasChanged)

{

printf("? buffer dirty\n");

}

else

{

dll_destroy(lst);

printf("\n");

printf("Bye\n");

break;

}

}

else if(strcmp(buff,"w")==0)

{

FILE* pFile = fopen(filename, "w");

if (!pFile) {

perror("The following error occurred:");

} else {

struct node* headNode=getHead(lst);

while(headNode!=NULL)

{

fprintf(pFile, strcat((char *) (getData(headNode)),"\n"));

headNode=nextNode(headNode);

}

printf("%s:file\n",filename );

hasChanged=0;

fclose(pFile);

}

}

else if(strcmp(buff,"wq")==0)

{

FILE* pFile = fopen(filename, "w");

if (!pFile) {

perror("The following error occurred:");

}

else {

struct node* headNode=getHead(lst);

while(headNode!=NULL)

{

printf("%s\n", (char *) (getData(headNode)) );

fprintf(pFile, strcat((char *) (getData(headNode)),"\n"));

headNode=nextNode(headNode);

}

printf("%s:file\n",filename );

hasChanged=0;

fclose(pFile);

dll_destroy(lst);

printf("\n");

printf("Bye\n");

break;

}

}

else if(strcmp(buff,"i")==0)

{

int looping=1;

while(looping)

{

fgets(buff,MAX_LINE, stdin);

printf("%d\n",strcmp(buff,".") );

if(strcmp(buff,".")==10)

{

break;

}

else

{

dll_insert_at(lst,getCursorNumber(lst),(void *) buff);

dll_move_to(lst,getCursorNumber(lst));

}

}

}

else if(strcmp(buff,"d")==0)

{

printf("HITIN\n");

dll_pop(lst,getCursorNumber(lst));

}

else

{

}

}

}

void readAndCreateStruct(const char * filename)

{

DlList_T myList=dll_create();

FILE* pFile = fopen(filename, "r");

if (!pFile) {

perror("The following error occurred:");

}

else {

char* buf = (char*) malloc(sizeof(char) * MAX_LINE);

size_t n=MAX_LINE;

while(getline(&buf, &n, pFile)!=-1)

{

strtok(buf,"\n");

void* input=malloc(sizeof(char)*(strlen(buf)));

printf("%s\n",buf );

memcpy(input,buf,strlen(buf));

dll_append(myList, input);

}

//printList(myList);

free(buf);

fclose(pFile);

}

dll_move_to(myList,dll_size(myList));

startLookingforInput(myList,filename);

}

void hasExplictparam(const char * filename)

{

readAndCreateStruct(filename);

}

void noExplictparam()

{

printf("no file supplied\n");

DlList_T lst=dll_create();

int hasChanged=0;

int looping=1;

char buff[MAX_LINE];

while(looping)

{

fgets(buff,MAX_LINE, stdin);

strtok(buff,"\n");

if(strcmp(buff,"Q")==0)

{

dll_destroy(lst);

break;

}

else if(strcmp(buff,".")==0)

{

showCursor(lst);

}

else if(strcmp(buff,"a")==0)

{

int currentlooping=1;

while(currentlooping)

{

fgets(buff,MAX_LINE, stdin);

strtok(buff,"\n");

if(strcmp(buff,".")==0)

{

break;

}

else

{

void* input=malloc(sizeof(char)*(strlen(buff)));

memcpy(input,buff,strlen(buff));

dll_append(lst, input);

dll_move_to(lst,dll_size(lst));

hasChanged=1;

//printf("SIZE %d\n",dll_size(lst) );

//showCursor(lst);

//printList(lst);

}

}

}

else if(strcmp(buff, "\n")==0 || strcmp(buff,"+")==0)

{

if(getNext(lst)!=NULL)

{

dll_move_to(lst,getCursorNumber(lst) +1);

}

else

{

printf("?\n" );

}

}

else if(strcmp(buff,"-")==0)

{

if(getPrevious(lst)!=NULL)

{

dll_move_to(lst,getCursorNumber(lst) -1);

}

}

else if(strcmp(buff,"$")==0)

{

if(getHead(lst)==NULL)

{

printf("?\n");

}

else

{

dll_move_to(lst,dll_size(lst));

showCursor(lst);

}

}

//NEEDS WORKS

else if(isdigit(buff))

{ printf("GOT HERE\n");

int newIndex=atoi(buff);

if(newIndex>=1 && newIndex<=dll_size(lst))

{

dll_move_to(lst,newIndex);

}

}

else if(strcmp(buff,".=")==0)

{

printf("%d\n",getCursorNumber(lst));

}

else if(strcmp(buff,"$=")==0)

{

printf("%d\n",dll_size(lst));

}

else if(strcmp(buff,"p")==0)

{

printListForward(lst);

dll_move_to(lst,dll_size(lst));

}

else if(strcmp(buff,"q")==0)

{

if(hasChanged)

{

printf("? buffer dirty\n");

}

else

{

dll_destroy(lst);

printf("\n");

printf("Bye\n");

break;

}

}

else if(strcmp(buff,"w")==0)

{

printf("?\n");

}

else if(strcmp(buff,"wq")==0)

{

printf("?\n");

}

else if(strcmp(buff,"i")==0)

{

int looping=1;

while(looping)

{

fgets(buff,MAX_LINE, stdin);

printf("%d\n",strcmp(buff,".") );

if(strcmp(buff,".")==10)

{

break;

}

else

{

dll_insert_at(lst,getCursorNumber(lst),(void *) buff);

dll_move_to(lst,getCursorNumber(lst));

}

}

}

else if(strcmp(buff,"d")==0)

{

dll_pop(lst,getCursorNumber(lst));

}

else

{

}

}

}

int main(int argc, char *argv[])

{

//printf("%s\n", argv[1] );

if(argc<2)

{

noExplictparam();

}

else

{

if(file_exists(argv[1]))

{

hasExplictparam(argv[1]);

}

else

{

printf("could not read file ’actual-file-name\n");

}

}

return 0;

}