/*
** Called to "rewind" a cursor back to the beginning so that
** it starts its output over again. Always called at least once
** prior to any wholenumberColumn, wholenumberRowid, or wholenumberEof call.
**
** idxNum Constraints
** ------ ---------------------
** 0 (none)
** 1 value > $argv0
** 2 value >= $argv0
** 4 value < $argv0
** 8 value <= $argv0
**
** 5 value > $argv0 AND value < $argv1
** 6 value >= $argv0 AND value < $argv1
** 9 value > $argv0 AND value <= $argv1
** 10 value >= $argv0 AND value <= $argv1
*/
static int wholenumberFilter(
sqlite3_vtab_cursor pVtabCursor,
int idxNum, string idxStr,
int argc, sqlite3_value[] argv
)
{
wholenumber_cursor pCur = (wholenumber_cursor)pVtabCursor;
sqlite3_int64 v;
int i = 0;
pCur.iValue = 1;
pCur.mxValue = 0xffffffff; /* 4294967295 */
if ((idxNum & 3) != 0)
{
v = sqlite3_value_int64(argv[0]) + (idxNum & 1);
if (v > pCur.iValue && v <= pCur.mxValue)
{
pCur.iValue = (uint)v;
}
i++;
}
if ((idxNum & 12) != 0)
{
v = sqlite3_value_int64(argv[i]) - ((idxNum >> 2) & 1);
if (v >= pCur.iValue && v < pCur.mxValue)
{
pCur.mxValue = (uint)v;
}
}
return(SQLITE_OK);
}
/*
** The rowid.
*/
static int wholenumberRowid(sqlite3_vtab_cursor cur, out sqlite_int64 pRowid)
{
wholenumber_cursor pCur = (wholenumber_cursor)cur;
pRowid = pCur.iValue;
return(SQLITE_OK);
}
/*
** Advance a cursor to its next row of output
*/
static int wholenumberNext(sqlite3_vtab_cursor cur)
{
wholenumber_cursor pCur = (wholenumber_cursor)cur;
pCur.iValue++;
return(SQLITE_OK);
}
/* The xDisconnect and xDestroy methods are also the same */
/*
** Open a new wholenumber cursor.
*/
static int wholenumberOpen(sqlite3_vtab p, out sqlite3_vtab_cursor ppCursor)
{
wholenumber_cursor pCur;
pCur = new wholenumber_cursor();//sqlite3_malloc( sizeof(*pCur) );
//if ( pCur == null )
// return SQLITE_NOMEM;
//memset(pCur, 0, sizeof(*pCur));
ppCursor = pCur;//.base;
return(SQLITE_OK);
}
/*
** Return the value associated with a wholenumber.
*/
static int wholenumberColumn(
sqlite3_vtab_cursor cur,
sqlite3_context ctx,
int i
)
{
wholenumber_cursor pCur = (wholenumber_cursor)cur;
sqlite3_result_int64(ctx, pCur.iValue);
return(SQLITE_OK);
}
/* The xDisconnect and xDestroy methods are also the same */
/*
** Open a new wholenumber cursor.
*/
static int wholenumberOpen( sqlite3_vtab p, out sqlite3_vtab_cursor ppCursor )
{
wholenumber_cursor pCur;
pCur = new wholenumber_cursor();//sqlite3_malloc( sizeof(*pCur) );
//if ( pCur == null )
// return SQLITE_NOMEM;
//memset(pCur, 0, sizeof(*pCur));
ppCursor = pCur;//.base;
return SQLITE_OK;
}
/*
** When the wholenumber_cursor.rLimit value is 0 or less, that is a signal
** that the cursor has nothing more to output.
*/
static int wholenumberEof(sqlite3_vtab_cursor cur)
{
wholenumber_cursor pCur = (wholenumber_cursor)cur;
return((pCur.iValue > pCur.mxValue || pCur.iValue == 0) ? 1 : 0);
}