/*
** Invoke a virtual table constructor (either xCreate or xConnect). The
** pointer to the function to invoke is passed as the fourth parameter
** to this procedure.
*/
static int vtabCallConstructor(
sqlite3 db,
Table pTab,
Module pMod,
smdxCreateConnect xConstruct,
ref string pzErr
)
{
VtabCtx sCtx = new VtabCtx();
VTable pVTable;
int rc;
string[] azArg = pTab.azModuleArg;
int nArg = pTab.nModuleArg;
string zErr = null;
string zModuleName = sqlite3MPrintf( db, "%s", pTab.zName );
//if ( String.IsNullOrEmpty( zModuleName ) )
//{
// return SQLITE_NOMEM;
//}
pVTable = new VTable();//sqlite3DbMallocZero( db, sizeof( VTable ) );
//if ( null == pVTable )
//{
// sqlite3DbFree( db, ref zModuleName );
// return SQLITE_NOMEM;
//}
pVTable.db = db;
pVTable.pMod = pMod;
/* Invoke the virtual table constructor */
//assert( &db->pVtabCtx );
Debug.Assert( xConstruct != null );
sCtx.pTab = pTab;
sCtx.pVTable = pVTable;
db.pVtabCtx = sCtx;
rc = xConstruct( db, pMod.pAux, nArg, azArg, out pVTable.pVtab, out zErr );
db.pVtabCtx = null;
//if ( rc == SQLITE_NOMEM )
// db.mallocFailed = 1;
if ( SQLITE_OK != rc )
{
if ( zErr == "" )
{
pzErr = sqlite3MPrintf( db, "vtable constructor failed: %s", zModuleName );
}
else
{
pzErr = sqlite3MPrintf( db, "%s", zErr );
zErr = null;//sqlite3_free( zErr );
}
sqlite3DbFree( db, ref pVTable );
}
else if ( ALWAYS( pVTable.pVtab ) )
{
/* Justification of ALWAYS(): A correct vtab constructor must allocate
** the sqlite3_vtab object if successful. */
pVTable.pVtab.pModule = pMod.pModule;
pVTable.nRef = 1;
if ( sCtx.pTab != null )
{
string zFormat = "vtable constructor did not declare schema: %s";
pzErr = sqlite3MPrintf( db, zFormat, pTab.zName );
sqlite3VtabUnlock( pVTable );
rc = SQLITE_ERROR;
}
else
{
int iCol;
/* If everything went according to plan, link the new VTable structure
** into the linked list headed by pTab->pVTable. Then loop through the
** columns of the table to see if any of them contain the token "hidden".
** If so, set the Column.isHidden flag and remove the token from
** the type string. */
pVTable.pNext = pTab.pVTable;
pTab.pVTable = pVTable;
for ( iCol = 0; iCol < pTab.nCol; iCol++ )
{
if ( String.IsNullOrEmpty( pTab.aCol[iCol].zType ) )
continue;
StringBuilder zType = new StringBuilder( pTab.aCol[iCol].zType);
int nType;
int i = 0;
//if ( zType )
// continue;
nType = sqlite3Strlen30( zType );
if ( sqlite3StrNICmp( "hidden", 0, zType.ToString(), 6 ) != 0 || ( zType.Length > 6 && zType[6] != ' ' ) )
{
for ( i = 0; i < nType; i++ )
{
if ( ( 0 == sqlite3StrNICmp( " hidden", zType.ToString().Substring( i ), 7 ) )
&& ( i+7 == zType.Length || (zType[i + 7] == '\0' || zType[i + 7] == ' ' ))
)
{
i++;
break;
}
}
}
if ( i < nType )
{
int j;
int nDel = 6 + ( zType.Length > i + 6 ? 1 : 0 );
for ( j = i; ( j + nDel ) < nType; j++ )
{
zType[j] = zType[j + nDel];
}
if ( zType[i] == '\0' && i > 0 )
{
Debug.Assert( zType[i - 1] == ' ' );
zType.Length = i;//[i - 1] = '\0';
}
pTab.aCol[iCol].isHidden = 1;
pTab.aCol[iCol].zType = zType.ToString().Substring(0,j);
}
}
}
}
sqlite3DbFree( db, ref zModuleName );
return rc;
}
/*
** Invoke a virtual table constructor (either xCreate or xConnect). The
** pointer to the function to invoke is passed as the fourth parameter
** to this procedure.
*/
static int vtabCallConstructor(
sqlite3 db,
Table pTab,
Module pMod,
smdxCreateConnect xConstruct,
ref string pzErr
)
{
VtabCtx sCtx = new VtabCtx();
VTable pVTable;
int rc;
string[] azArg = pTab.azModuleArg;
int nArg = pTab.nModuleArg;
string zErr = null;
string zModuleName = sqlite3MPrintf(db, "%s", pTab.zName);
//if ( String.IsNullOrEmpty( zModuleName ) )
//{
// return SQLITE_NOMEM;
//}
pVTable = new VTable();//sqlite3DbMallocZero( db, sizeof( VTable ) );
//if ( null == pVTable )
//{
// sqlite3DbFree( db, ref zModuleName );
// return SQLITE_NOMEM;
//}
pVTable.db = db;
pVTable.pMod = pMod;
/* Invoke the virtual table constructor */
//assert( &db->pVtabCtx );
Debug.Assert(xConstruct != null);
sCtx.pTab = pTab;
sCtx.pVTable = pVTable;
db.pVtabCtx = sCtx;
rc = xConstruct(db, pMod.pAux, nArg, azArg, out pVTable.pVtab, out zErr);
db.pVtabCtx = null;
//if ( rc == SQLITE_NOMEM )
// db.mallocFailed = 1;
if (SQLITE_OK != rc)
{
if (zErr == "")
{
pzErr = sqlite3MPrintf(db, "vtable constructor failed: %s", zModuleName);
}
else
{
pzErr = sqlite3MPrintf(db, "%s", zErr);
zErr = null;//sqlite3_free( zErr );
}
sqlite3DbFree(db, ref pVTable);
}
else if (ALWAYS(pVTable.pVtab))
{
/* Justification of ALWAYS(): A correct vtab constructor must allocate
** the sqlite3_vtab object if successful. */
pVTable.pVtab.pModule = pMod.pModule;
pVTable.nRef = 1;
if (sCtx.pTab != null)
{
string zFormat = "vtable constructor did not declare schema: %s";
pzErr = sqlite3MPrintf(db, zFormat, pTab.zName);
sqlite3VtabUnlock(pVTable);
rc = SQLITE_ERROR;
}
else
{
int iCol;
/* If everything went according to plan, link the new VTable structure
** into the linked list headed by pTab->pVTable. Then loop through the
** columns of the table to see if any of them contain the token "hidden".
** If so, set the Column.isHidden flag and remove the token from
** the type string. */
pVTable.pNext = pTab.pVTable;
pTab.pVTable = pVTable;
for (iCol = 0; iCol < pTab.nCol; iCol++)
{
if (String.IsNullOrEmpty(pTab.aCol[iCol].zType))
{
continue;
}
StringBuilder zType = new StringBuilder(pTab.aCol[iCol].zType);
int nType;
int i = 0;
//if ( zType )
// continue;
nType = sqlite3Strlen30(zType);
if (sqlite3StrNICmp("hidden", 0, zType.ToString(), 6) != 0 || (zType.Length > 6 && zType[6] != ' '))
{
for (i = 0; i < nType; i++)
{
if ((0 == sqlite3StrNICmp(" hidden", zType.ToString().Substring(i), 7)) &&
(i + 7 == zType.Length || (zType[i + 7] == '\0' || zType[i + 7] == ' '))
)
{
i++;
break;
}
}
}
if (i < nType)
{
int j;
int nDel = 6 + (zType.Length > i + 6 ? 1 : 0);
for (j = i; (j + nDel) < nType; j++)
{
zType[j] = zType[j + nDel];
}
if (zType[i] == '\0' && i > 0)
{
Debug.Assert(zType[i - 1] == ' ');
zType.Length = i;//[i - 1] = '\0';
}
pTab.aCol[iCol].isHidden = 1;
pTab.aCol[iCol].zType = zType.ToString().Substring(0, j);
}
}
}
}
sqlite3DbFree(db, ref zModuleName);
return(rc);
}