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util: add Uint256DecodeStringBE()

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This commit is contained in:
Evgenii Stratonikov 2019-12-03 16:17:04 +03:00
parent 72fe884faa
commit aa20a95181
2 changed files with 25 additions and 0 deletions
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15
pkg/util/uint256.go
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@ -28,6 +28,21 @@ func Uint256DecodeStringLE(s string) (u Uint256, err error) {
return Uint256DecodeBytesLE(b) return Uint256DecodeBytesLE(b)
} }
// Uint256DecodeStringBE attempts to decode the given string (in BE representation)
// into an Uint256.
func Uint256DecodeStringBE(s string) (u Uint256, err error) {
if len(s) != Uint256Size*2 {
return u, fmt.Errorf("expected string size of %d got %d", Uint256Size*2, len(s))
}
b, err := hex.DecodeString(s)
if err != nil {
return u, err
}
return Uint256DecodeBytesBE(b)
}
// Uint256DecodeBytesBE attempts to decode the given string (in BE representation) into an Uint256. // Uint256DecodeBytesBE attempts to decode the given string (in BE representation) into an Uint256.
func Uint256DecodeBytesBE(b []byte) (u Uint256, err error) { func Uint256DecodeBytesBE(b []byte) (u Uint256, err error) {
if len(b) != Uint256Size { if len(b) != Uint256Size {

10
pkg/util/uint256_test.go
View file

@ -37,6 +37,10 @@ func TestUint256DecodeString(t *testing.T) {
require.NoError(t, err) require.NoError(t, err)
assert.Equal(t, hexStr, val.StringLE()) assert.Equal(t, hexStr, val.StringLE())
valBE, err := Uint256DecodeStringBE(hexStr)
require.NoError(t, err)
assert.Equal(t, val, valBE.Reverse())
bs, err := hex.DecodeString(hexStr) bs, err := hex.DecodeString(hexStr)
require.NoError(t, err) require.NoError(t, err)
@ -48,9 +52,15 @@ func TestUint256DecodeString(t *testing.T) {
_, err = Uint256DecodeStringLE(hexStr[1:]) _, err = Uint256DecodeStringLE(hexStr[1:])
assert.Error(t, err) assert.Error(t, err)
_, err = Uint256DecodeStringBE(hexStr[1:])
assert.Error(t, err)
hexStr = "zzz7308fa0ab18155bccfc08485468c112409ea5064595699e98c545f245f32d" hexStr = "zzz7308fa0ab18155bccfc08485468c112409ea5064595699e98c545f245f32d"
_, err = Uint256DecodeStringLE(hexStr) _, err = Uint256DecodeStringLE(hexStr)
assert.Error(t, err) assert.Error(t, err)
_, err = Uint256DecodeStringBE(hexStr)
assert.Error(t, err)
} }
func TestUint256DecodeBytes(t *testing.T) { func TestUint256DecodeBytes(t *testing.T) {