diff options
Diffstat (limited to 'src/pkg/compress/gzip/gunzip.go')
| -rw-r--r-- | src/pkg/compress/gzip/gunzip.go | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/src/pkg/compress/gzip/gunzip.go b/src/pkg/compress/gzip/gunzip.go index 1fb9b0964..4f398b194 100644 --- a/src/pkg/compress/gzip/gunzip.go +++ b/src/pkg/compress/gzip/gunzip.go @@ -89,6 +89,21 @@ func NewReader(r io.Reader) (*Reader, error) { return z, nil } +// Reset discards the Reader z's state and makes it equivalent to the +// result of its original state from NewReader, but reading from r instead. +// This permits reusing a Reader rather than allocating a new one. +func (z *Reader) Reset(r io.Reader) error { + z.r = makeReader(r) + if z.digest == nil { + z.digest = crc32.NewIEEE() + } else { + z.digest.Reset() + } + z.size = 0 + z.err = nil + return z.readHeader(true) +} + // GZIP (RFC 1952) is little-endian, unlike ZLIB (RFC 1950). func get4(p []byte) uint32 { return uint32(p[0]) | uint32(p[1])<<8 | uint32(p[2])<<16 | uint32(p[3])<<24 |