diff options
Diffstat (limited to 'src/pkg/encoding/base64/base64.go')
| -rw-r--r-- | src/pkg/encoding/base64/base64.go | 24 |
1 files changed, 11 insertions, 13 deletions
diff --git a/src/pkg/encoding/base64/base64.go b/src/pkg/encoding/base64/base64.go index 4f1fcad917..f89afd2b92 100644 --- a/src/pkg/encoding/base64/base64.go +++ b/src/pkg/encoding/base64/base64.go @@ -74,31 +74,29 @@ func (enc *Encoding) Encode(dst, src []byte) { } for len(src) > 0 { - dst[0] = 0 - dst[1] = 0 - dst[2] = 0 - dst[3] = 0 + var b0, b1, b2, b3 byte // Unpack 4x 6-bit source blocks into a 4 byte // destination quantum switch len(src) { default: - dst[3] |= src[2] & 0x3F - dst[2] |= src[2] >> 6 + b3 |= src[2] & 0x3F + b2 |= src[2] >> 6 fallthrough case 2: - dst[2] |= (src[1] << 2) & 0x3F - dst[1] |= src[1] >> 4 + b2 |= (src[1] << 2) & 0x3F + b1 |= src[1] >> 4 fallthrough case 1: - dst[1] |= (src[0] << 4) & 0x3F - dst[0] |= src[0] >> 2 + b1 |= (src[0] << 4) & 0x3F + b0 |= src[0] >> 2 } // Encode 6-bit blocks using the base64 alphabet - for j := 0; j < 4; 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] // Pad the final quantum if len(src) < 3 { |