30 lines
669 B
Go
30 lines
669 B
Go
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//go:build !go1.20
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// +build !go1.20
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package strconv
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import (
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"reflect"
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"unsafe"
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)
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// B2S converts byte slice to a string without memory allocation.
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// See https://groups.google.com/forum/#!msg/Golang-Nuts/ENgbUzYvCuU/90yGx7GUAgAJ .
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func B2S(b []byte) string {
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return *(*string)(unsafe.Pointer(&b))
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}
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// S2B converts string to a byte slice without memory allocation.
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//
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// Note it may break if string and/or slice header will change
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// in the future go versions.
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func S2B(s string) (b []byte) {
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sh := (*reflect.StringHeader)(unsafe.Pointer(&s))
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bh := (*reflect.SliceHeader)(unsafe.Pointer(&b))
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bh.Data = sh.Data
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bh.Cap = sh.Len
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bh.Len = sh.Len
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return b
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}
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