52 lines
1.7 KiB
Go
52 lines
1.7 KiB
Go
/*
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* Copyright 2024 CloudWeGo Authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package base64x
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import (
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`reflect`
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`unsafe`
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)
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func mem2str(v []byte) (s string) {
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(*reflect.StringHeader)(unsafe.Pointer(&s)).Len = (*reflect.SliceHeader)(unsafe.Pointer(&v)).Len
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(*reflect.StringHeader)(unsafe.Pointer(&s)).Data = (*reflect.SliceHeader)(unsafe.Pointer(&v)).Data
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return
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}
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func str2mem(s string) (v []byte) {
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(*reflect.SliceHeader)(unsafe.Pointer(&v)).Cap = (*reflect.StringHeader)(unsafe.Pointer(&s)).Len
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(*reflect.SliceHeader)(unsafe.Pointer(&v)).Len = (*reflect.StringHeader)(unsafe.Pointer(&s)).Len
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(*reflect.SliceHeader)(unsafe.Pointer(&v)).Data = (*reflect.StringHeader)(unsafe.Pointer(&s)).Data
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return
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}
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func mem2addr(v []byte) unsafe.Pointer {
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return *(*unsafe.Pointer)(unsafe.Pointer(&v))
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}
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// NoEscape hides a pointer from escape analysis. NoEscape is
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// the identity function but escape analysis doesn't think the
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// output depends on the input. NoEscape is inlined and currently
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// compiles down to zero instructions.
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// USE CAREFULLY!
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//go:nosplit
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//goland:noinspection GoVetUnsafePointer
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func noEscape(p unsafe.Pointer) unsafe.Pointer {
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x := uintptr(p)
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return unsafe.Pointer(x ^ 0)
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}
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