12199391122

Committed 06 Dec 2024 01:10PM UTC coverage: 49.807% (-9.1%) from 58.933%

Build # 12199391122

Build Type

push

github

Committed by

web-flow

Commit Message

Merge pull request #9337 from Guayaba221/patch-1

chore: fix typo in ruby.md

Run Details

100137 of 201051 relevant lines covered (49.81%)

2.07 hits per line

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63.04

/shachain/utils.go

package shachain

import (
        "encoding/hex"

        "github.com/btcsuite/btcd/chaincfg/chainhash"
)

// getBit return bit on index at position.
func getBit(index index, position uint8) uint8 {
        return uint8((uint64(index) >> position) & 1)
}

func getPrefix(index index, position uint8) uint64 {
        //        + -------------------------- +
        //         | №  | value | mask | return |
        //        + -- + ----- + ---- + ------ +
        //        | 63 |         1   |  0   |         0   |
        //        | 62 |         0   |  0   |         0   |
        //        | 61 |   1   |  0   |         0   |
        //                ....
        //        |  4 |         1   |  0   |         0   |
        //        |  3 |   1   |  0   |         0   |
        //        |  2 |   1   |  1   |         1   | <--- position
        //        |  1 |   0   |  1   |         0   |
        //        |  0 |   1   |  1   |         1   |
        //        + -- + ----- + ---- + ------ +

        var zero uint64
        mask := (zero - 1) - uint64((1<<position)-1)
        return (uint64(index) & mask)
}

// countTrailingZeros counts number of trailing zero bits, this function is
// used to determine the number of element bucket.
func countTrailingZeros(index index) uint8 {
        var zeros uint8
        for ; zeros < maxHeight; zeros++ {

                if getBit(index, zeros) != 0 {
                        break
                }
        }

        return zeros
}

// hashFromString takes a hex-encoded string as input and creates an instance of
// chainhash.Hash. The chainhash.NewHashFromStr function not suitable because
// it reverse the given hash.
func hashFromString(s string) (*chainhash.Hash, error) {
        // Return an error if hash string is too long.
        if len(s) > chainhash.MaxHashStringSize {
                return nil, chainhash.ErrHashStrSize
        }

        // Hex decoder expects the hash to be a multiple of two.
        if len(s)%2 != 0 {
                s = "0" + s
        }

        // Convert string hash to bytes.
        buf, err := hex.DecodeString(s)
        if err != nil {
                return nil, err
        }

        hash, err := chainhash.NewHash(buf)
        if err != nil {
                return nil, err
        }

        return hash, nil
}

1	package shachain
2
3	import (
4	"encoding/hex"
5
6	"github.com/btcsuite/btcd/chaincfg/chainhash"
7	)
8
9	// getBit return bit on index at position.
10	func getBit(index index, position uint8) uint8 {	4✔
11	return uint8((uint64(index) >> position) & 1)	4✔
12	}	4✔
13
14	func getPrefix(index index, position uint8) uint64 {	4✔
15	// + -------------------------- +	4✔
16	// \| № \| value \| mask \| return \|	4✔
17	// + -- + ----- + ---- + ------ +	4✔
18	// \| 63 \| 1 \| 0 \| 0 \|	4✔
19	// \| 62 \| 0 \| 0 \| 0 \|	4✔
20	// \| 61 \| 1 \| 0 \| 0 \|	4✔
21	// ....	4✔
22	// \| 4 \| 1 \| 0 \| 0 \|	4✔
23	// \| 3 \| 1 \| 0 \| 0 \|	4✔
24	// \| 2 \| 1 \| 1 \| 1 \| <--- position	4✔
25	// \| 1 \| 0 \| 1 \| 0 \|	4✔
26	// \| 0 \| 1 \| 1 \| 1 \|	4✔
27	// + -- + ----- + ---- + ------ +	4✔
28		4✔
29	var zero uint64	4✔
30	mask := (zero - 1) - uint64((1<<position)-1)	4✔
31	return (uint64(index) & mask)	4✔
32	}	4✔
33
34	// countTrailingZeros counts number of trailing zero bits, this function is
35	// used to determine the number of element bucket.
36	func countTrailingZeros(index index) uint8 {	4✔
37	var zeros uint8	4✔
38	for ; zeros < maxHeight; zeros++ {	8✔
39		4✔
40	if getBit(index, zeros) != 0 {	8✔
41	break	4✔
42	}
43	}
44
45	return zeros	4✔
46	}
47
48	// hashFromString takes a hex-encoded string as input and creates an instance of
49	// chainhash.Hash. The chainhash.NewHashFromStr function not suitable because
50	// it reverse the given hash.
51	func hashFromString(s string) (*chainhash.Hash, error) {	×
52	// Return an error if hash string is too long.	×
53	if len(s) > chainhash.MaxHashStringSize {	×
54	return nil, chainhash.ErrHashStrSize	×
55	}	×
56
57	// Hex decoder expects the hash to be a multiple of two.
58	if len(s)%2 != 0 {	×
59	s = "0" + s	×
60	}	×
61
62	// Convert string hash to bytes.
63	buf, err := hex.DecodeString(s)	×
64	if err != nil {	×
65	return nil, err	×
66	}	×
67
68	hash, err := chainhash.NewHash(buf)	×
69	if err != nil {	×
70	return nil, err	×
71	}	×
72
73	return hash, nil	×
74	}

lightningnetwork / lnd / 12199391122

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