Uncompress a raw GZIP stream — inflate • zip

Uncompress a raw GZIP stream

Usage

inflate(buffer, pos = 1L, size = NULL, raw = FALSE)

Arguments

buffer: Raw vector, containing the data to uncompress.
pos: Start position of data to uncompress in buffer.
size: Uncompressed size estimate, or NULL. If not given, or too small, the output buffer is resized multiple times.
raw: Whether buffer contains a raw DEFLATE stream, i.e. one without a zlib header and trailer. The default (FALSE) expects a zlib stream.

Value

Named list with three entries:

output: raw vector, the uncompressed data,
bytes_read: number of bytes used from buffer,
bytes_written: number of bytes written to the output buffer.

See also

base::memDecompress() does the same with type = "gzip", but it does not tell you the number of bytes read from the input.

Examples

data_gz <- deflate(charToRaw("Hello world!"))
inflate(data_gz$output)
#> $output
#>  [1] 48 65 6c 6c 6f 20 77 6f 72 6c 64 21
#> 
#> $bytes_read
#> [1] 24
#> 
#> $bytes_written
#> [1] 12
#>