/* Gamelon(tm) File I/O Library Sample Code  C++ Language */

/* (C)1994 Menai Corporation(tm)  Released for public use */

/* Example 7. How to conduct a Fixed Transaction     */

/* alteration.                                       */

/* Fixed Transactions occur in reference to a        */

/* particular position within the file. The contents */

/* of the transaction are Inserted before the        */

/* current location of the cursor, Appended after    */

/* the current location of the cursor, or replace    */

/* the object in the current focus of the cursor.    */

/* The following example shows the steps necessary   */

/* to perform a Fixed Transaction:                   */

/* Beginning file layout:        */

/*    {                       }  */

/*     [2]{         }[3.14159]   */

/*         [5700304]             */

#include <stdlib.h>

#include "gfcursor.hpp"

int main(void) {

char newchar = 'u';

int valid;

CURSOR *c = new CURSOR("newfile");

c>eCursorQueryValid(&valid);

if (!valid)

exit(1);

c>eCursorMoveIn();

c>eCursorMoveLast();

c>eAltInsert();

c>eAltBeginFixedTransaction();

/* Cursor moves to temporary file. */

c>eCursorMovePreFirst();

c>eAltAppend();

c>eObjWrite(newchar);

c>eAltAppend();

c>eObjWriteAggregate();

c>eCursorMoveNext();

c>eAltModify();

c>eAltStartAggregating();

c>eObjSetComment("A single character.");

c>eObjSetClass(144);

c>eObjWrite(newchar);

c>eObjApplyIdentity();

c>eObjSetComment("budget");

c>eObjImportOSFile("123sheet.w1", OSF_ALL);

/* Commit ends aggregation, not Fixed Transaction. */

c>eAltCommit();

c>eAltCommitFixedTransaction();

delete c;

return 0;

}

#if 0

/* Ending file layout (in vertical display format):      */

/* {                                                     */

/*   [2]                                                 */

/*     {                                                 */

/*       [5700304]                                       */

/*     }                                                 */

/*     {                                                 */

/*       ['u':CL(144):CO("A single character.")]         */

/*       ["123sheet.w1":ID(/*9*/):CO("Budget")]          */

/*     }                                                 */

/*   ['u']                                               */

/*   [3.14159]                                           */

/* }                                                     */

#endif

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