(r io.Reader, dict []byte)
| 132 | } |
| 133 | |
| 134 | func (z *reader) Reset(r io.Reader, dict []byte) error { |
| 135 | *z = reader{decompressor: z.decompressor, digest: z.digest} |
| 136 | if fr, ok := r.(flate.Reader); ok { |
| 137 | z.r = fr |
| 138 | } else { |
| 139 | z.r = bufio.NewReader(r) |
| 140 | } |
| 141 | |
| 142 | // Read the header (RFC 1950 section 2.2.). |
| 143 | _, z.err = io.ReadFull(z.r, z.scratch[0:2]) |
| 144 | if z.err != nil { |
| 145 | if z.err == io.EOF { |
| 146 | z.err = io.ErrUnexpectedEOF |
| 147 | } |
| 148 | return z.err |
| 149 | } |
| 150 | h := binary.BigEndian.Uint16(z.scratch[:2]) |
| 151 | if (z.scratch[0]&0x0f != zlibDeflate) || (z.scratch[0]>>4 > zlibMaxWindow) || (h%31 != 0) { |
| 152 | z.err = ErrHeader |
| 153 | return z.err |
| 154 | } |
| 155 | haveDict := z.scratch[1]&0x20 != 0 |
| 156 | if haveDict { |
| 157 | _, z.err = io.ReadFull(z.r, z.scratch[0:4]) |
| 158 | if z.err != nil { |
| 159 | if z.err == io.EOF { |
| 160 | z.err = io.ErrUnexpectedEOF |
| 161 | } |
| 162 | return z.err |
| 163 | } |
| 164 | checksum := binary.BigEndian.Uint32(z.scratch[:4]) |
| 165 | if checksum != adler32.Checksum(dict) { |
| 166 | z.err = ErrDictionary |
| 167 | return z.err |
| 168 | } |
| 169 | } |
| 170 | |
| 171 | if z.decompressor == nil { |
| 172 | if haveDict { |
| 173 | z.decompressor = flate.NewReaderDict(z.r, dict) |
| 174 | } else { |
| 175 | z.decompressor = flate.NewReader(z.r) |
| 176 | } |
| 177 | } else { |
| 178 | z.decompressor.(flate.Resetter).Reset(z.r, dict) |
| 179 | } |
| 180 | |
| 181 | if z.digest != nil { |
| 182 | z.digest.Reset() |
| 183 | } else { |
| 184 | z.digest = adler32.New() |
| 185 | } |
| 186 | return nil |
| 187 | } |
nothing calls this directly
no test coverage detected