/* 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.h"
int main(void) {
char newchar = 'u';
int valid;
CURSOR *c = new_CURSOR(NULL,
"newfile",
AM_SHARED,
NULL,
0);
eCursorQueryValid(c, &valid);
if (!valid)
exit(1);
eCursorMoveIn(c);
eCursorMoveLast(c, OT_OBJ);
eAltInsert(c);
eAltBeginFixedTransaction(c);
/* Cursor moves to temporary file. */
eCursorMovePreFirst(c);
eAltAppend(c);
eObjWriteChar(c, newchar);
eAltAppend(c);
eObjWriteAggregate(c);
eCursorMoveNext(c, OT_OBJ);
eAltModify(c);
eAltStartAggregating(c);
eObjSetComment(c, "A single character.");
eObjSetClass(c, 144);
eObjWriteChar(c, newchar);
eObjApplyIdentity(c, NULL);
eObjSetComment(c, "budget");
eObjImportOSFile(c, "c:\123sheet.w1", OSF_ALL);
/* Commit ends aggregation, not Fixed Transaction. */
eAltCommit(c);
eAltCommitFixedTransaction(c);
delete_CURSOR(c);
return 0;
}
#if 0
/* Ending file layout (in vertical display format): */
/* { */
/* [2] */
/* { */
/* [5700304] */
/* } */
/* { */
/* ['u':CL(144):CO("A single character.")] */
/* ["c:\123sheet.w1":ID(/*9*/):CO("Budget")] */
/* } */
/* ['u'] */
/* [3.14159] */
/* } */
#endif
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