Merge pull request #201 from Bytom/v0.1

[bytom/vapor.git] / vendor / github.com / mr-tron / base58 / trivial.go

diff --git a/vendor/github.com/mr-tron/base58/trivial.go b/vendor/github.com/mr-tron/base58/trivial.go
deleted file mode 100644 (file)
index eff54f4..0000000
--- a/vendor/github.com/mr-tron/base58/trivial.go
+++ /dev/null
@@ -1,74 +0,0 @@
-package base58
-
-import (
-       "fmt"
-       "math/big"
-)
-
-var (
-       bn0  = big.NewInt(0)
-       bn58 = big.NewInt(58)
-)
-
-// TrivialBase58Encoding encodes the passed bytes into a base58 encoded string
-// (inefficiently).
-func TrivialBase58Encoding(a []byte) string {
-       return TrivialBase58EncodingAlphabet(a, BTCAlphabet)
-}
-
-// TrivialBase58EncodingAlphabet encodes the passed bytes into a base58 encoded
-// string (inefficiently) with the passed alphabet.
-func TrivialBase58EncodingAlphabet(a []byte, alphabet *Alphabet) string {
-       zero := alphabet.encode[0]
-       idx := len(a)*138/100 + 1
-       buf := make([]byte, idx)
-       bn := new(big.Int).SetBytes(a)
-       var mo *big.Int
-       for bn.Cmp(bn0) != 0 {
-               bn, mo = bn.DivMod(bn, bn58, new(big.Int))
-               idx--
-               buf[idx] = alphabet.encode[mo.Int64()]
-       }
-       for i := range a {
-               if a[i] != 0 {
-                       break
-               }
-               idx--
-               buf[idx] = zero
-       }
-       return string(buf[idx:])
-}
-
-// TrivialBase58Decoding decodes the base58 encoded bytes (inefficiently).
-func TrivialBase58Decoding(str string) ([]byte, error) {
-       return TrivialBase58DecodingAlphabet(str, BTCAlphabet)
-}
-
-// TrivialBase58DecodingAlphabet decodes the base58 encoded bytes
-// (inefficiently) using the given b58 alphabet.
-func TrivialBase58DecodingAlphabet(str string, alphabet *Alphabet) ([]byte, error) {
-       zero := alphabet.encode[0]
-
-       var zcount int
-       for i := 0; i < len(str) && str[i] == zero; i++ {
-               zcount++
-       }
-       leading := make([]byte, zcount)
-
-       var padChar rune = -1
-       src := []byte(str)
-       j := 0
-       for ; j < len(src) && src[j] == byte(padChar); j++ {
-       }
-
-       n := new(big.Int)
-       for i := range src[j:] {
-               c := alphabet.decode[src[i]]
-               if c == -1 {
-                       return nil, fmt.Errorf("illegal base58 data at input index: %d", i)
-               }
-               n.Mul(n, bn58)
-               n.Add(n, big.NewInt(int64(c)))
-       }
-       return append(leading, n.Bytes()...), nil
-}