/* Gamelon(tm) File I/O Library Sample Code - C++ Language */
/* (C)1994 Menai Corporation(tm) - Released for public use */

/* Example 9a. How to read the contents of stored objects */
/* when structure of the file is known.                   */

/* When the program knows the structure of the file, the  */
/* program may simply move from object to object within   */
/* the file, reading the contents of each object using    */
/* datatype-specific read calls. For example, if the      */
/* contents of a particular file (or of an aggregate      */
/* within a file) are an integer value 14, a character    */
/* value 'F' and a string value "Wherefore art thou,      */
/* Romeo?", the function calls to read such a file could  */
/* be as follows:                                         */

/* Beginning file layout:                     */
/*  {                                       } */
/*   [14]['F']["Wherefore art thou, Romeo?"]  */

#include <stdlib.h>
#include <iostream.h>
#include "gfcursor.hpp"

int main(void) {
	int valid;
	short i;
	char ch;
	char *strptr;
	size_t strsize;

	CURSOR *c = new CURSOR("newfile");
	c->eCursorQueryValid(&valid);
	if (!valid)
		exit(-1);
	c->eCursorMoveIn();
	c->eObjRead(&i);
	c->eCursorMoveNext();
	c->eObjRead(&ch);
	c->eCursorMoveNext();
	c->eObjQueryDataSize(&strsize);
	strptr = new char[strsize];
	c->eObjRead(strptr, strsize);
	cout << "i = " << i << endl;
	cout << "ch = " << ch << endl;
	cout << "strptr = " << strptr << endl;
	delete (strptr);
	delete c;
	return 0;
}

/* Program output:                     */
/* i = 14                              */
/* ch = F                              */
/* strptr = Wherefore art thou, Romeo? */

/* The ObjRead functions are overloaded; as a result, */
/* all the ObjRead calls look similar. The parameters */
/* of each function call distinguish the exact        */
/* function called to read information from the       */
/* object. Note that in order to properly read the    */
/* object containing the string value, the programmer */
/* must first query the object for its datasize, in   */
/* order to allocate enough memory for the string, or */
/* the programmer can just use a large pre-allocated  */
/* block of memory. The size of the block of memory   */
/* is then passed to the ObjRead function.            */