bindings/go/string.go

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 opendal

import (
	"context"
	"unsafe"

	"github.com/jupiterrider/ffi"
)

func copyCStringAndFree(ptr *byte, free func(*byte)) string {
	if ptr == nil {
		return ""
	}

	defer free(ptr)
	return BytePtrToString(ptr)
}

var ffiStringFree = newFFI(ffiOpts{
	sym:    "opendal_string_free",
	rType:  &ffi.TypeVoid,
	aTypes: []*ffi.Type{&ffi.TypePointer},
}, func(_ context.Context, ffiCall ffiCall) func(ptr *byte) {
	return func(ptr *byte) {
		ffiCall(
			nil,
			unsafe.Pointer(&ptr),
		)
	}
})