27 lines
768 B
Go
27 lines
768 B
Go
package conv
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import (
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"reflect"
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"unsafe"
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)
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// UnsafeStrToBytes uses unsafe to convert string into byte array. Returned bytes
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// must not be altered after this function is called as it will cause a segmentation fault.
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func UnsafeStrToBytes(s string) []byte {
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var buf []byte
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sHdr := (*reflect.StringHeader)(unsafe.Pointer(&s))
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bufHdr := (*reflect.SliceHeader)(unsafe.Pointer(&buf))
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bufHdr.Data = sHdr.Data
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bufHdr.Cap = sHdr.Len
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bufHdr.Len = sHdr.Len
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return buf
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}
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// UnsafeBytesToStr is meant to make a zero allocation conversion
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// from []byte -> string to speed up operations, it is not meant
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// to be used generally, but for a specific pattern to delete keys
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// from a map.
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func UnsafeBytesToStr(b []byte) string {
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return *(*string)(unsafe.Pointer(&b))
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}
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