github.com/fibonacci-chain/fbc@v0.0.0-20231124064014-c7636198c1e9/libs/cosmos-sdk/types/string.go (about)

     1  package types
     2  
     3  import (
     4  	"reflect"
     5  	"unsafe"
     6  )
     7  
     8  // UnsafeStrToBytes uses unsafe to convert string into byte array. Returned bytes
     9  // must not be altered after this function is called as it will cause a segmentation fault.
    10  func UnsafeStrToBytes(s string) []byte {
    11  	var buf []byte
    12  	sHdr := (*reflect.StringHeader)(unsafe.Pointer(&s))
    13  	bufHdr := (*reflect.SliceHeader)(unsafe.Pointer(&buf))
    14  	bufHdr.Data = sHdr.Data
    15  	bufHdr.Cap = sHdr.Len
    16  	bufHdr.Len = sHdr.Len
    17  	return buf
    18  }
    19  
    20  // UnsafeBytesToStr is meant to make a zero allocation conversion
    21  // from []byte -> string to speed up operations, it is not meant
    22  // to be used generally, but for a specific pattern to delete keys
    23  // from a map.
    24  func UnsafeBytesToStr(b []byte) string {
    25  	return *(*string)(unsafe.Pointer(&b))
    26  }