diff options
Diffstat (limited to 'src/pkg/encoding/base32/base32.go')
| -rw-r--r-- | src/pkg/encoding/base32/base32.go | 44 |
1 files changed, 21 insertions, 23 deletions
diff --git a/src/pkg/encoding/base32/base32.go b/src/pkg/encoding/base32/base32.go index 7613de24d2..ea5c0ae27c 100644 --- a/src/pkg/encoding/base32/base32.go +++ b/src/pkg/encoding/base32/base32.go @@ -73,45 +73,43 @@ func (enc *Encoding) Encode(dst, src []byte) { } for len(src) > 0 { - dst[0] = 0 - dst[1] = 0 - dst[2] = 0 - dst[3] = 0 - dst[4] = 0 - dst[5] = 0 - dst[6] = 0 - dst[7] = 0 + var b0, b1, b2, b3, b4, b5, b6, b7 byte // Unpack 8x 5-bit source blocks into a 5 byte // destination quantum switch len(src) { default: - dst[7] |= src[4] & 0x1F - dst[6] |= src[4] >> 5 + b7 |= src[4] & 0x1F + b6 |= src[4] >> 5 fallthrough case 4: - dst[6] |= (src[3] << 3) & 0x1F - dst[5] |= (src[3] >> 2) & 0x1F - dst[4] |= src[3] >> 7 + b6 |= (src[3] << 3) & 0x1F + b5 |= (src[3] >> 2) & 0x1F + b4 |= src[3] >> 7 fallthrough case 3: - dst[4] |= (src[2] << 1) & 0x1F - dst[3] |= (src[2] >> 4) & 0x1F + b4 |= (src[2] << 1) & 0x1F + b3 |= (src[2] >> 4) & 0x1F fallthrough case 2: - dst[3] |= (src[1] << 4) & 0x1F - dst[2] |= (src[1] >> 1) & 0x1F - dst[1] |= (src[1] >> 6) & 0x1F + b3 |= (src[1] << 4) & 0x1F + b2 |= (src[1] >> 1) & 0x1F + b1 |= (src[1] >> 6) & 0x1F fallthrough case 1: - dst[1] |= (src[0] << 2) & 0x1F - dst[0] |= src[0] >> 3 + b1 |= (src[0] << 2) & 0x1F + b0 |= src[0] >> 3 } // Encode 5-bit blocks using the base32 alphabet - for j := 0; j < 8; j++ { - dst[j] = enc.encode[dst[j]] - } + dst[0] = enc.encode[b0] + dst[1] = enc.encode[b1] + dst[2] = enc.encode[b2] + dst[3] = enc.encode[b3] + dst[4] = enc.encode[b4] + dst[5] = enc.encode[b5] + dst[6] = enc.encode[b6] + dst[7] = enc.encode[b7] // Pad the final quantum if len(src) < 5 { |