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 +1,182 @@
+// 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 functions
+
+import (
+	"fmt"
+	"strconv"
+	"strings"
+
+	"github.com/cockroachdb/errors"
+	"github.com/dolthub/go-mysql-server/sql"
+	"github.com/jackc/pgtype"
+
+	"github.com/dolthub/doltgresql/postgres/parser/sem/tree"
+	"github.com/dolthub/doltgresql/server/functions/framework"
+	pgtypes "github.com/dolthub/doltgresql/server/types"
+	"github.com/dolthub/doltgresql/utils"
+)
+
+// initVarBit registers the functions to the catalog.
+func initVarBit() {
+	framework.RegisterFunction(varbitin)
+	framework.RegisterFunction(varbitout)
+	framework.RegisterFunction(varbitrecv)
+	framework.RegisterFunction(varbitsend)
+	framework.RegisterFunction(varbittypmodin)
+	framework.RegisterFunction(varbittypmodout)
+}
+
+// varbitin represents the PostgreSQL function of varbit type IO input.
+var varbitin = framework.Function3{
+	Name:       "varbit_in",
+	Return:     pgtypes.VarBit,
+	Parameters: [3]*pgtypes.DoltgresType{pgtypes.Cstring, pgtypes.Oid, pgtypes.Int32},
+	Strict:     true,
+	Callable: func(ctx *sql.Context, _ [4]*pgtypes.DoltgresType, val1, _, val3 any) (any, error) {
+		input := val1.(string)
+		typmod := val3.(int32)
+
+		// validation and normalization
+		bitStr, err := tree.ParseDBitArray(input)
+		if err != nil {
+			return nil, err
+		}
+
+		// Check length against typmod (varbit allows up to typmod length)
+		if typmod != -1 {
+			if int32(bitStr.BitLen()) > typmod {
+				return nil, pgtypes.ErrVarBitLengthExceeded.New(typmod)
+			}
+		}
+
+		return tree.AsStringWithFlags(bitStr, tree.FmtPgwireText), nil
+	},
+}
+
+// varbitout represents the PostgreSQL function of varbit type IO output.
+var varbitout = framework.Function1{
+	Name:       "varbit_out",
+	Return:     pgtypes.Cstring,
+	Parameters: [1]*pgtypes.DoltgresType{pgtypes.VarBit},
+	Strict:     true,
+	Callable: func(ctx *sql.Context, t [2]*pgtypes.DoltgresType, val any) (any, error) {
+		bitStr, ok, err := sql.Unwrap[string](ctx, val)
+		if err != nil {
+			return nil, err
+		}
+		if !ok {
+			return nil, fmt.Errorf("varbit_out function returned false")
+		}
+		return bitStr, nil
+	},
+}
+
+// varbitrecv represents the PostgreSQL function of varbit type IO receive.
+var varbitrecv = framework.Function3{
+	Name:       "varbit_recv",
+	Return:     pgtypes.VarBit,
+	Parameters: [3]*pgtypes.DoltgresType{pgtypes.Internal, pgtypes.Oid, pgtypes.Int32},
+	Strict:     true,
+	Callable: func(ctx *sql.Context, _ [4]*pgtypes.DoltgresType, val1, val2, val3 any) (any, error) {
+		data := val1.([]byte)
+		if data == nil {
+			return nil, nil
+		}
+		typmod := val3.(int32)
+		var out pgtype.Varbit
+		err := out.DecodeBinary(nil, data)
+		if err != nil {
+			return nil, err
+		}
+		var str string
+		for _, b := range out.Bytes {
+			str += fmt.Sprintf("%08b", b)
+		}
+		str = str[:out.Len]
+		if typmod != -1 {
+			str = str[:typmod]
+		}
+		return str, nil
+	},
+}
+
+// varbitsend represents the PostgreSQL function of varbit type IO send.
+var varbitsend = framework.Function1{
+	Name:       "varbit_send",
+	Return:     pgtypes.Bytea,
+	Parameters: [1]*pgtypes.DoltgresType{pgtypes.VarBit},
+	Strict:     true,
+	Callable: func(ctx *sql.Context, _ [2]*pgtypes.DoltgresType, val any) (any, error) {
+		if wrapper, ok := val.(sql.AnyWrapper); ok {
+			var err error
+			val, err = wrapper.UnwrapAny(ctx)
+			if err != nil {
+				return nil, err
+			}
+			if val == nil {
+				return nil, nil
+			}
+		}
+		bitString := val.(string)
+		originalLength := int32(len(bitString))
+		// We process bits in chunks of 8, so we append zeroes until our string is evenly divisible by 8
+		if len(bitString)%8 != 0 {
+			bitString += strings.Repeat("0", 8-(len(bitString)%8))
+		}
+		writer := utils.NewWireWriter()
+		writer.Reserve(uint64(4 + (len(bitString) / 8)))
+		writer.WriteInt32(originalLength)
+		for bufIdx := 0; bufIdx < len(bitString); bufIdx += 8 {
+			parsedByte, err := strconv.ParseUint(bitString[bufIdx:bufIdx+8], 2, 8)
+			if err != nil {
+				return nil, errors.Errorf(`error encountered while converting "VARBIT" to binary wire format:\n%s`, err.Error())
+			}
+			writer.WriteUint8(byte(parsedByte))
+		}
+		return writer.BufferData(), nil
+	},
+}
+
+// varbittypmodin represents the PostgreSQL function of varbit type IO typmod input.
+var varbittypmodin = framework.Function1{
+	Name:       "varbittypmodin",
+	Return:     pgtypes.Int32,
+	Parameters: [1]*pgtypes.DoltgresType{pgtypes.CstringArray},
+	Strict:     true,
+	Callable: func(ctx *sql.Context, _ [2]*pgtypes.DoltgresType, val any) (any, error) {
+		typmod, err := getTypModFromStringArr("bit varying", val.([]any))
+		if err != nil {
+			return nil, err
+		}
+		// getTypModFromStringArr always adds 4, so we remove 4 here since it doesn't apply to varbit types
+		return typmod - 4, nil
+	},
+}
+
+// varbittypmodout represents the PostgreSQL function of varbit type IO typmod output.
+var varbittypmodout = framework.Function1{
+	Name:       "varbittypmodout",
+	Return:     pgtypes.Cstring,
+	Parameters: [1]*pgtypes.DoltgresType{pgtypes.Int32},
+	Strict:     true,
+	Callable: func(ctx *sql.Context, _ [2]*pgtypes.DoltgresType, val any) (any, error) {
+		typmod := val.(int32)
+		if typmod < 1 {
+			return "", nil
+		}
+		return fmt.Sprintf("(%v)", typmod), nil
+	},
+}