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Towards virtual tables.

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Nuno Cruces
2023-11-17 22:39:00 +00:00
parent 2c2f825bc5
commit a49cc084f3
3 changed files with 126 additions and 15 deletions
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59
vtab.go
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@@ -383,23 +383,66 @@ func vtabCallbackIIII(ctx context.Context, mod api.Module, _, _, _, _ uint32) ui
}
func cursorOpenCallback(ctx context.Context, mod api.Module, pVTab, ppCur uint32) uint32 {
return uint32(ERROR)
vtab := vtabGetHandle(ctx, mod, pVTab).(VTab)
cursor, err := vtab.Open()
if err == nil {
vtabPutHandle(ctx, mod, ppCur, cursor)
}
// TODO: error message?
return errorCode(err, ERROR)
}
func cursorCloseCallback(ctx context.Context, mod api.Module, pCur uint32) uint32 {
cursor := vtabGetHandle(ctx, mod, pCur).(VTabCursor)
err := cursor.Close()
// TODO: error message?
return errorCode(err, ERROR)
}
func cursorFilterCallback(ctx context.Context, mod api.Module, pCur, idxNum, idxStr, argc, argv uint32) uint32 {
return uint32(ERROR)
cursor := vtabGetHandle(ctx, mod, pCur).(VTabCursor)
db := ctx.Value(connKey{}).(*Conn)
args := callbackArgs(db, argc, argv)
err := cursor.Filter(int(idxNum), util.ReadString(mod, idxStr, _MAX_STRING), args...)
// TODO: error message?
return errorCode(err, ERROR)
}
func cursorEOFCallback(ctx context.Context, mod api.Module, pCur uint32) uint32 {
cursor := vtabGetHandle(ctx, mod, pCur).(VTabCursor)
if cursor.EOF() {
return 1
}
return 0
}
func cursorNextCallback(ctx context.Context, mod api.Module, pCur uint32) uint32 {
cursor := vtabGetHandle(ctx, mod, pCur).(VTabCursor)
err := cursor.Next()
// TODO: error message?
return errorCode(err, ERROR)
}
func cursorColumnCallback(ctx context.Context, mod api.Module, pCur, pCtx, n uint32) uint32 {
return uint32(ERROR)
cursor := vtabGetHandle(ctx, mod, pCur).(VTabCursor)
db := ctx.Value(connKey{}).(*Conn)
err := cursor.Column(&Context{db, pCtx}, int(n))
// TODO: error message?
return errorCode(err, ERROR)
}
func cursorRowidCallback(ctx context.Context, mod api.Module, pCur, pRowid uint32) uint32 {
return uint32(ERROR)
}
func cursorRowIDCallback(ctx context.Context, mod api.Module, pCur, pRowID uint32) uint32 {
cursor := vtabGetHandle(ctx, mod, pCur).(VTabCursor)
func cursorCallbackI(ctx context.Context, mod api.Module, _ uint32) uint32 {
return uint32(ERROR)
rowID, err := cursor.RowID()
if err == nil {
util.WriteUint64(mod, pRowID, uint64(rowID))
}
// TODO: error message?
return errorCode(err, ERROR)
}
func vtabGetHandle(ctx context.Context, mod api.Module, ptr uint32) any {