Upload new file

EDFILE.C

+// Program to implement display file.
+
+#include<graphics.h>
+#include<conio.h>
+#include<stdio.h>
+#include<math.h>
+
+#define NULL 0
+
+#define FALSE 0
+#define TRUE 1
+
+#define START_POSITION 0
+
+// link list for display file
+typedef struct dp{
+    int opcode;
+    int x;
+    int y;
+    struct dp * next;
+}dp;
+
+// function declaration
+int menu();
+int inputMenu();
+int deleteMenu();
+dp* createNode();
+int shiftingOfPointY(int );
+int round(float);
+void clear();
+
+FILE * openFile(char *);
+void closeFile(FILE *);
+
+void readFromFile(dp *,FILE *);
+void writeInFile(dp *,FILE *);
+
+void inputDisplayCmd(dp *,int,int,int);
+void deleteFromDisplayCmd(dp *);
+
+void drawOnScreen(dp *,dp*);
+void print(dp *,int);
+
+// gobal variables
+dp *head = NULL;
+FILE *fptr = NULL;
+
+dp* openeditor()
+{               dp* temp;
+	/*fptr = open("save.txt","w");
+		if(feof(fptr)) // no data in file
+		{
+	      	    printf("\n The File doesnot exists or File is Empty");
+		    //closeFile(fptr);
+	    	    break;
+		}*/
+		if(head == NULL)
+		    head = createNode();
+	/*	readFromFile(head,fptr);
+	    	printf("Reading from file successful.");
+		closeFile(fptr);
+		drawOnScreen(head,NULL);*/
+		if(head!=NULL) {
+		temp=head;
+		while(temp->next!=NULL)
+			temp=temp->next;
+		return temp;
+		}
+		return NULL;
+
+}
+
+void removeall()  //implement eraseall
+{
+	head=NULL;
+}
+
+void closeeditor()
+{
+		if(head == NULL){
+	       //	    printf("There is nothing to write to the file");
+		  //  break;
+		}
+		fptr = openFile("w");
+		writeInFile(head,fptr);
+		closeFile(fptr);
+
+}
+
+dp* saveeditor(dp* head,int opcode,int color,int x,int y)
+{
+	    if(head == NULL)
+		head = createNode();
+		inputDisplayCmd(head,opcode,x,y);
+	    return head->next;
+}
+    /*
+void main(){
+    int gd=DETECT;
+    int gm=0;
+    initgraph(&gd,&gm,"..\\bgi");
+
+    while(1){
+	clear();
+	switch(menu()){
+	    case 1:
+	    {
+	    // read from file
+	       //	clear();
+	    //   printf("\n");
+		fptr = openFile("r");
+		if(feof(fptr)) // no data in file
+		{
+	    //	    printf("\n The File doesnot exists or File is Empty");
+		    //closeFile(fptr);
+		    break;
+		}
+		if(head == NULL)
+		    head = createNode();
+		//readFromFile(head,fptr);
+	    //	printf("Reading from file successful.");
+		//closeFile(fptr);
+		break;
+	    }
+
+	    case 2:
+	    {
+	    // Write to file
+	       //	clear();
+	    //   printf("\n");
+		if(head == NULL){
+	      //	    printf("There is nothing to write to the file");
+		    break;
+		}
+		fptr = openFile("w");
+		writeInFile(head,fptr);
+		closeFile(fptr);
+	  //	printf("Writing on the file successful.");
+		break;
+	   }
+
+	   case 3:
+	   {
+	   // make a display command list
+	    dp * temp;
+	    clear();
+	    if(head == NULL){
+		head = createNode();
+		inputDisplayCmd(head);
+	    }else{
+		print(head,START_POSITION);
+		temp = head;
+		while(temp->next != NULL)
+		    temp = temp->next;
+		inputDisplayCmd(temp);
+	    }
+	    break;
+	}
+
+	case 4:
+	{
+	   // delete from display command list
+		   clear();
+		   if(head == NULL)
+		   {
+	    //	    printf("\n There is no list from delete");
+			break;
+			}
+			deleteFromDisplayCmd(head);
+		    break;
+			}
+
+   case 5:
+	  {
+	       // draw on screen
+		   clear();
+		   if(head == NULL)
+		   {
+	      //	    printf("\n There is no list to Draw");
+			break;
+			}
+	       drawOnScreen(head,NULL);
+		   break;
+		   }
+   case 6:
+	  {
+	   // display the command
+		   clear();
+		   if(head == NULL)
+		   {
+	       //	    printf("No data to display");
+		    break;
+			}
+
+	//	   printf("\n The display file commands are : \n");
+		   print(head,START_POSITION);
+		   break;
+		   }
+   case 0:
+	  {	flushall();
+		exit(0);
+		   }
+   default :
+		cleardevice();
+	  //	printf("\n You have given wrong command");
+   }// end of switch
+
+  getch();
+  } // end of while
+ }
+     */
+// main menu
+int menu()
+{
+ int value;
+
+ /*
+ printf("\n1. Read from File");
+ printf("\n2. Write to File");
+ printf("\n3. Add new command");
+ printf("\n4. Delete command");
+ printf("\n5. Draw On screen");
+ printf("\n6. Show display file");
+ printf("\n0. Exit");    */
+ scanf("%d",&value);
+ return value;
+ }
+
+// create new node(object)
+dp* createNode()
+{
+ return (dp*)malloc(sizeof(dp));
+ }
+
+// open given file
+FILE * openFile(char* mode)
+{
+ FILE *fptr;
+
+ fptr = fopen("..\\save.txt",mode);
+
+ return fptr;
+ }
+
+// close file
+void closeFile(FILE *fptr)
+{
+ fclose(fptr);
+ }
+
+// writting data to the file in normalize form
+void writeInFile(dp *record,FILE *fptr)
+{
+ float x,y;
+ if(record->next != NULL)
+ {  //   printf("F");
+   // convert to normalize form
+   x=((float)record->x)/((float)getmaxx());
+   y=((float)record->y)/((float)getmaxy());
+
+  fprintf(fptr,"%d %f %f ",record->opcode,x,y);
+//  printf("%f %f \n",x,y);
+  writeInFile(record->next,fptr);
+  }
+  return;
+ }
+
+// reading data from the file and converting it to screen co-ordinate form
+void readFromFile(dp * record,FILE *fptr)
+{
+ int opcode;
+ float x,y;
+ while(1) {
+ fscanf(fptr,"%d",&opcode);
+ fscanf(fptr,"%f",&x);
+ fscanf(fptr,"%f",&y);
+  //  printf("%f %f ",x,y);
+ if(!feof(fptr))
+ {           //printf("H");
+  record->opcode = opcode;
+  record->x = round(x*getmaxx()); // convert to screen form
+  record->y = round(y*getmaxy());
+  record->next = createNode();
+  }
+ else
+ {
+  record->next = NULL;
+  return ;
+  }
+
+ record=record->next; }
+ }
+
+// round value to nearest integer
+int round(float value)
+{
+ int val;
+
+ if(value - (int)value <= 0.5)
+   val = floor(value);
+ else
+   val = ceil(value);
+
+ return val;
+ }
+
+// function for inputing display file command
+void inputDisplayCmd(dp *record,int opcode,int x,int y)
+{
+// int opcode,chk;
+// int x,y;
+	  /*
+ chk = inputMenu();
+
+ if(chk == -1)
+ {
+  record->opcode = -1;
+  record->x =-1;
+  record->y = -1;
+  record->next = NULL;
+  return;
+  }
+
+ printf("\n Enter values : ");
+ opcode=chk;
+ scanf("%d",&x);
+ scanf("%d",&y);
+		   */
+ record->opcode = opcode;
+ record->x = x;
+ record->y = y;
+ record->next = createNode();
+
+ //inputDisplayCmd(record->next);
+ }
+
+int inputMenu()
+{
+ int chk;
+ printf("\n Enter your Choice");
+ printf("\n0. Moveto");
+ printf("\n1. Lineto");
+ printf("\n2. Moverel");
+ printf("\n3. Linerel");
+ printf("\n-1. Return to Main Menu");
+ scanf("%d",&chk);
+ return chk;
+ }
+
+// function for deleting display file command
+void deleteFromDisplayCmd(dp *record)
+{
+ int chk,count;
+ dp* prev=NULL;
+while(1) {
+ if(head==NULL)
+  {
+   printf("\n Nothing to delete");
+   return;
+  }
+ chk = deleteMenu();
+
+ if(chk == -1)
+  return;
+  prev=NULL;
+  record=head;
+
+ for(count = 1;count <chk ;count++)
+ {
+  if(record->next == NULL)
+  {
+   printf("\n Nothing to delete");
+   return;
+   }
+   prev=record;
+  record = record->next;
+  }
+ if(record==head)
+{
+	if(head->next!=NULL)
+		head=head->next;
+	else
+		head=NULL;
+}
+ else
+	prev->next=record->next;
+
+  }
+ }
+
+int deleteMenu()
+{
+ int chk;
+ printf("\n Enter your Choice");
+ printf("\n The display file is : \n");
+ print(head,START_POSITION);
+ printf("\n Enter the position of the Object to delete or -1 to exit: ");
+ scanf("%d",&chk);
+ return chk;
+ }
+
+void print(dp * record,int count)
+{
+ if(record->next!= NULL)
+ {
+  printf(" %d -> %d (%d,%d)\n",++count,record->opcode,record->x,record->y);
+  print(record->next,count);
+  }
+ return;
+ }
+
+void drawOnScreen(dp *record,dp* prev)
+{ while(1) {
+ if(record->next == NULL)
+  return;
+ switch(record->opcode)
+ {
+  case 0:
+	 {
+		  moveto(record->x,record->y);
+		  break;
+		  }
+  case 1:
+	 {
+		  lineto(record->x,record->y);
+		  break;
+		  }
+  case 2:
+	 {
+		  moveto(prev->x+record->x,(prev->y+record->y));
+		  break;
+		  }
+  case 3:
+	 {
+		  lineto(prev->x+record->x,(prev->y+record->y));
+		  break;
+		  }
+
+  default:
+		  { }
+  }
+  prev=record;
+ record=record->next; }
+ }
+
+int shiftingOfPointY(int y)
+{
+ return getmaxy() - y;
+}
+
+void clear()
+{
+ clrscr();
+ cleardevice();
+ }