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 +1,133 @@
+// 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 (
+	"strings"
+
+	"github.com/cockroachdb/errors"
+	"github.com/dolthub/go-mysql-server/sql"
+
+	"github.com/dolthub/doltgresql/server/functions/framework"
+	pgtypes "github.com/dolthub/doltgresql/server/types"
+	"github.com/dolthub/doltgresql/utils"
+)
+
+// initChar registers the functions to the catalog.
+func initChar() {
+	framework.RegisterFunction(charin)
+	framework.RegisterFunction(charout)
+	framework.RegisterFunction(charrecv)
+	framework.RegisterFunction(charsend)
+	framework.RegisterFunction(btcharcmp)
+}
+
+// charin represents the PostgreSQL function of "char" type IO input.
+var charin = framework.Function1{
+	Name:       "charin",
+	Return:     pgtypes.InternalChar,
+	Parameters: [1]*pgtypes.DoltgresType{pgtypes.Cstring},
+	Strict:     true,
+	Callable: func(ctx *sql.Context, _ [2]*pgtypes.DoltgresType, val any) (any, error) {
+		input := val.(string)
+		c := []byte(input)
+		if uint32(len(c)) > pgtypes.InternalCharLength {
+			return input[:pgtypes.InternalCharLength], nil
+		}
+		return input, nil
+	},
+}
+
+// charout represents the PostgreSQL function of "char" type IO output.
+var charout = framework.Function1{
+	Name:       "charout",
+	Return:     pgtypes.Cstring,
+	Parameters: [1]*pgtypes.DoltgresType{pgtypes.InternalChar},
+	Strict:     true,
+	Callable: func(ctx *sql.Context, t [2]*pgtypes.DoltgresType, val any) (any, error) {
+		str := val.(string)
+		if uint32(len(str)) > pgtypes.InternalCharLength {
+			return str[:pgtypes.InternalCharLength], nil
+		}
+		return str, nil
+	},
+}
+
+// charrecv represents the PostgreSQL function of "char" type IO receive.
+var charrecv = framework.Function1{
+	Name:       "charrecv",
+	Return:     pgtypes.InternalChar,
+	Parameters: [1]*pgtypes.DoltgresType{pgtypes.Internal},
+	Strict:     true,
+	Callable: func(ctx *sql.Context, _ [2]*pgtypes.DoltgresType, val any) (any, error) {
+		data := val.([]byte)
+		if data == nil {
+			return nil, nil
+		}
+		if len(data) == 0 {
+			return "", nil
+		}
+		return string(data[0]), nil
+	},
+}
+
+// charsend represents the PostgreSQL function of "char" type IO send.
+var charsend = framework.Function1{
+	Name:       "charsend",
+	Return:     pgtypes.Bytea,
+	Parameters: [1]*pgtypes.DoltgresType{pgtypes.InternalChar},
+	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
+			}
+		}
+		str := val.(string)
+		writer := utils.NewWireWriter()
+		if len(str) == 1 {
+			writer.WriteUint8(str[0])
+		} else if len(str) == 0 {
+			writer.WriteUint8(0)
+		} else {
+			return nil, errors.New(`"char" found multiple characters during binary wire formatting`)
+		}
+		return writer.BufferData(), nil
+	},
+}
+
+// btcharcmp represents the PostgreSQL function of "char" type compare.
+var btcharcmp = framework.Function2{
+	Name:       "btcharcmp",
+	Return:     pgtypes.Int32,
+	Parameters: [2]*pgtypes.DoltgresType{pgtypes.InternalChar, pgtypes.InternalChar},
+	Strict:     true,
+	Callable: func(ctx *sql.Context, _ [3]*pgtypes.DoltgresType, val1, val2 any) (any, error) {
+		ab := strings.TrimRight(val1.(string), " ")
+		bb := strings.TrimRight(val2.(string), " ")
+		if ab == bb {
+			return int32(0), nil
+		} else if ab < bb {
+			return int32(-1), nil
+		} else {
+			return int32(1), nil
+		}
+	},
+}