chore: import upstream snapshot with attribution

2026-07-13 12:32:25 +08:00
commit e014feafe1
2285 changed files with 1131979 additions and 0 deletions
@@ -0,0 +1,96 @@
+// Copyright 2024 Dolthub, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package types
+
+import (
+	"github.com/dolthub/go-mysql-server/sql"
+	"gopkg.in/src-d/go-errors.v1"
+
+	"github.com/dolthub/doltgresql/utils"
+
+	"github.com/dolthub/doltgresql/core/id"
+)
+
+// ErrVarBitLengthExceeded is returned when a varbit value exceeds the defined length.
+var ErrVarBitLengthExceeded = errors.NewKind(`bit string too long for type bit varying(%d)`)
+
+// VarBit is a varying-length bit string.
+var VarBit = &DoltgresType{
+	ID:                  toInternal("varbit"),
+	TypLength:           int16(-1),
+	PassedByVal:         false,
+	TypType:             TypeType_Base,
+	TypCategory:         TypeCategory_BitStringTypes,
+	IsPreferred:         false,
+	IsDefined:           true,
+	Delimiter:           ",",
+	RelID:               id.Null,
+	SubscriptFunc:       toFuncID("-"),
+	Elem:                internalNullType,
+	Array:               internalNullType,
+	InputFunc:           toFuncID("varbit_in", toInternal("cstring"), toInternal("oid"), toInternal("int4")),
+	OutputFunc:          toFuncID("varbit_out", toInternal("varbit")),
+	ReceiveFunc:         toFuncID("varbit_recv", toInternal("internal"), toInternal("oid"), toInternal("int4")),
+	SendFunc:            toFuncID("varbit_send", toInternal("varbit")),
+	ModInFunc:           toFuncID("varbittypmodin", toInternal("_cstring")),
+	ModOutFunc:          toFuncID("varbittypmodout", toInternal("int4")),
+	AnalyzeFunc:         toFuncID("-"),
+	Align:               TypeAlignment_Int,
+	Storage:             TypeStorage_Extended,
+	NotNull:             false,
+	BaseTypeType:        internalNullType,
+	TypMod:              -1,
+	NDims:               0,
+	TypCollation:        id.NewCollation("pg_catalog", "default"),
+	DefaulBin:           "",
+	Default:             "",
+	Acl:                 nil,
+	Checks:              nil,
+	attTypMod:           -1,
+	CompareFunc:         toFuncID("varbitcmp", toInternal("varbit"), toInternal("varbit")),
+	SerializationFunc:   serializeTypeVarbit,
+	DeserializationFunc: deserializeTypeVarbit,
+}
+
+// NewVarBitType returns a VarBit type with type modifier set
+// representing the max number of bits in the string.
+func NewVarBitType(width int32) (*DoltgresType, error) {
+	if width < 1 {
+		return nil, ErrLengthMustBeAtLeast1.New("varbit")
+	} else if width > StringMaxLength {
+		return nil, ErrLengthCannotExceed.New("varbit")
+	}
+	newType := *VarBit.WithAttTypMod(width)
+	return &newType, nil
+}
+
+// serializeTypeVarbit handles serialization from the standard representation to our serialized representation that is
+// written in Dolt.
+func serializeTypeVarbit(ctx *sql.Context, t *DoltgresType, val any) ([]byte, error) {
+	bitStr := val.(string)
+	writer := utils.NewWriter(uint64(len(bitStr) + 4))
+	writer.String(bitStr)
+	return writer.Data(), nil
+}
+
+// deserializeTypeVarbit handles deserialization from the Dolt serialized format to our standard representation used by
+// expressions and nodes.
+func deserializeTypeVarbit(ctx *sql.Context, t *DoltgresType, data []byte) (any, error) {
+	if len(data) == 0 {
+		return nil, nil
+	}
+	reader := utils.NewReader(data)
+	return reader.String(), nil
+}