49 lines
1.2 KiB
Go
49 lines
1.2 KiB
Go
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// +build none
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//sed -e 's/_N_/Hash/g' -e 's/_S_/32/g' -e '1d' types_template.go | gofmt -w hash.go
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package common
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import "math/big"
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type _N_ [_S_]byte
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func BytesTo_N_(b []byte) _N_ {
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var h _N_
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h.SetBytes(b)
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return h
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}
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func StringTo_N_(s string) _N_ { return BytesTo_N_([]byte(s)) }
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func BigTo_N_(b *big.Int) _N_ { return BytesTo_N_(b.Bytes()) }
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func HexTo_N_(s string) _N_ { return BytesTo_N_(FromHex(s)) }
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// Don't use the default 'String' method in case we want to overwrite
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// Get the string representation of the underlying hash
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func (h _N_) Str() string { return string(h[:]) }
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func (h _N_) Bytes() []byte { return h[:] }
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func (h _N_) Big() *big.Int { return Bytes2Big(h[:]) }
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func (h _N_) Hex() string { return "0x" + Bytes2Hex(h[:]) }
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// Sets the hash to the value of b. If b is larger than len(h) it will panic
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func (h *_N_) SetBytes(b []byte) {
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// Use the right most bytes
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if len(b) > len(h) {
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b = b[len(b)-_S_:]
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}
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// Reverse the loop
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for i := len(b) - 1; i >= 0; i-- {
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h[_S_-len(b)+i] = b[i]
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}
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}
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// Set string `s` to h. If s is larger than len(h) it will panic
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func (h *_N_) SetString(s string) { h.SetBytes([]byte(s)) }
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// Sets h to other
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func (h *_N_) Set(other _N_) {
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for i, v := range other {
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h[i] = v
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}
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}
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