chore: import upstream snapshot with attribution

server/functions/rpad.go

@@ -0,0 +1,61 @@
+// 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 (
+	"github.com/dolthub/go-mysql-server/sql"
+
+	"github.com/dolthub/doltgresql/server/functions/framework"
+	pgtypes "github.com/dolthub/doltgresql/server/types"
+)
+
+// initRpad registers the functions to the catalog.
+func initRpad() {
+	framework.RegisterFunction(rpad_text_int32)
+	framework.RegisterFunction(rpad_text_int32_text)
+}
+
+// rpad_text_int32 represents the PostgreSQL function of the same name, taking the same parameters.
+var rpad_text_int32 = framework.Function2{
+	Name:       "rpad",
+	Return:     pgtypes.Text,
+	Parameters: [2]*pgtypes.DoltgresType{pgtypes.Text, pgtypes.Int32},
+	Strict:     true,
+	Callable: func(ctx *sql.Context, _ [3]*pgtypes.DoltgresType, val1 any, val2 any) (any, error) {
+		var unusedTypes [4]*pgtypes.DoltgresType
+		return rpad_text_int32_text.Callable(ctx, unusedTypes, val1, val2, " ")
+	},
+}
+
+// rpad_text_int32_text represents the PostgreSQL function of the same name, taking the same parameters.
+var rpad_text_int32_text = framework.Function3{
+	Name:       "rpad",
+	Return:     pgtypes.Text,
+	Parameters: [3]*pgtypes.DoltgresType{pgtypes.Text, pgtypes.Int32, pgtypes.Text},
+	Strict:     true,
+	Callable: func(ctx *sql.Context, _ [4]*pgtypes.DoltgresType, str any, length any, fill any) (any, error) {
+		if length.(int32) <= 0 {
+			return "", nil
+		}
+		runes := []rune(str.(string))
+		fillRunes := []rune(fill.(string))
+		if len(fillRunes) > 0 {
+			for int32(len(runes)) < length.(int32) {
+				runes = append(runes, fillRunes...)
+			}
+		}
+		return string(runes[:length.(int32)]), nil
+	},
+}