Merge pull request #201 from Bytom/v0.1

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

diff --git a/vendor/github.com/mr-tron/base58/base58.go b/vendor/github.com/mr-tron/base58/base58.go
deleted file mode 100644 (file)
index 6835d58..0000000
--- a/vendor/github.com/mr-tron/base58/base58.go
+++ /dev/null
@@ -1,163 +0,0 @@
-package base58
-
-import (
-       "fmt"
-)
-
-// Encode encodes the passed bytes into a base58 encoded string.
-func Encode(bin []byte) string {
-       return FastBase58EncodingAlphabet(bin, BTCAlphabet)
-}
-
-// EncodeAlphabet encodes the passed bytes into a base58 encoded string with the
-// passed alphabet.
-func EncodeAlphabet(bin []byte, alphabet *Alphabet) string {
-       return FastBase58EncodingAlphabet(bin, alphabet)
-}
-
-// FastBase58Encoding encodes the passed bytes into a base58 encoded string.
-func FastBase58Encoding(bin []byte) string {
-       return FastBase58EncodingAlphabet(bin, BTCAlphabet)
-}
-
-// FastBase58EncodingAlphabet encodes the passed bytes into a base58 encoded
-// string with the passed alphabet.
-func FastBase58EncodingAlphabet(bin []byte, alphabet *Alphabet) string {
-       zero := alphabet.encode[0]
-
-       binsz := len(bin)
-       var i, j, zcount, high int
-       var carry uint32
-
-       for zcount < binsz && bin[zcount] == 0 {
-               zcount++
-       }
-
-       size := (binsz-zcount)*138/100 + 1
-       var buf = make([]uint32, size)
-
-       high = size - 1
-       for i = zcount; i < binsz; i++ {
-               j = size - 1
-               for carry = uint32(bin[i]); j > high || carry != 0; j-- {
-                       carry += buf[j] << 8
-                       buf[j] = carry % 58
-                       carry /= 58
-               }
-               high = j
-       }
-
-       for j = 0; j < size && buf[j] == 0; j++ {
-       }
-
-       var b58 = make([]byte, size-j+zcount)
-
-       if zcount != 0 {
-               for i = 0; i < zcount; i++ {
-                       b58[i] = zero
-               }
-       }
-
-       for i = zcount; j < size; i++ {
-               b58[i] = alphabet.encode[buf[j]]
-               j++
-       }
-
-       return string(b58)
-}
-
-// Decode decodes the base58 encoded bytes.
-func Decode(str string) ([]byte, error) {
-       return FastBase58DecodingAlphabet(str, BTCAlphabet)
-}
-
-// DecodeAlphabet decodes the base58 encoded bytes using the given b58 alphabet.
-func DecodeAlphabet(str string, alphabet *Alphabet) ([]byte, error) {
-       return FastBase58DecodingAlphabet(str, alphabet)
-}
-
-// FastBase58Decoding decodes the base58 encoded bytes.
-func FastBase58Decoding(str string) ([]byte, error) {
-       return FastBase58DecodingAlphabet(str, BTCAlphabet)
-}
-
-// FastBase58DecodingAlphabet decodes the base58 encoded bytes using the given
-// b58 alphabet.
-func FastBase58DecodingAlphabet(str string, alphabet *Alphabet) ([]byte, error) {
-       if len(str) == 0 {
-               return nil, fmt.Errorf("zero length string")
-       }
-
-       var (
-               t, c   uint64
-               zmask  uint32
-               zcount int
-
-               b58u  = []rune(str)
-               b58sz = len(b58u)
-
-               outisz    = (b58sz + 3) >> 2
-               binu      = make([]byte, (b58sz+3)*3)
-               bytesleft = b58sz & 3
-
-               zero = rune(alphabet.encode[0])
-       )
-
-       if bytesleft > 0 {
-               zmask = 0xffffffff << uint32(bytesleft*8)
-       } else {
-               bytesleft = 4
-       }
-
-       var outi = make([]uint32, outisz)
-
-       for i := 0; i < b58sz && b58u[i] == zero; i++ {
-               zcount++
-       }
-
-       for _, r := range b58u {
-               if r > 127 {
-                       return nil, fmt.Errorf("high-bit set on invalid digit")
-               }
-               if alphabet.decode[r] == -1 {
-                       return nil, fmt.Errorf("invalid base58 digit (%q)", r)
-               }
-
-               c = uint64(alphabet.decode[r])
-
-               for j := outisz - 1; j >= 0; j-- {
-                       t = uint64(outi[j])*58 + c
-                       c = (t >> 32) & 0x3f
-                       outi[j] = uint32(t & 0xffffffff)
-               }
-
-               if c > 0 {
-                       return nil, fmt.Errorf("output number too big (carry to the next int32)")
-               }
-
-               if outi[0]&zmask != 0 {
-                       return nil, fmt.Errorf("output number too big (last int32 filled too far)")
-               }
-       }
-
-       var j, cnt int
-       for j, cnt = 0, 0; j < outisz; j++ {
-               for mask := byte(bytesleft-1) * 8; mask <= 0x18; mask, cnt = mask-8, cnt+1 {
-                       binu[cnt] = byte(outi[j] >> mask)
-               }
-               if j == 0 {
-                       bytesleft = 4 // because it could be less than 4 the first time through
-               }
-       }
-
-       for n, v := range binu {
-               if v > 0 {
-                       start := n - zcount
-                       if start < 0 {
-                               start = 0
-                       }
-                       return binu[start:cnt], nil
-               }
-       }
-       return binu[:cnt], nil
-}