use ctypes.util.find_library

[GoogleCodeExporter]

to support other operating systems:

#!/usr/bin/env python

from ctypes import byref, cdll, create_string_buffer, c_char_p, c_int

__all__ = ['compress', 'uncompress', 'decompress']

try:
  import ctypes.util
  lib_snappy_path = ctypes.util.find_library('snappy')
  lib_snappy = cdll.LoadLibrary(lib_snappy_path)
  __sappy_max_compressed_length = lib_snappy.snappy_max_compressed_length
  __snappy_compress = lib_snappy.snappy_compress
  __snappy_uncompress = lib_snappy.snappy_uncompress
  __snappy_uncompressed_length = lib_snappy.snappy_uncompressed_length
except OSError:
  raise ImportError, 'Snappy DLL not found.'

class SnappyException(Exception):
  pass

def compress(s):
  '''Compress the string using snappy.'''
  cbuf = create_string_buffer(__snappy_max_compressed_length(len(s)))
  clen = c_int(__snappy_max_compressed_length(len(s)))
  cresult = __snappy_compress(c_char_p(s), len(s), cbuf, byref(clen))
  if cresult != 0:
    raise SnappyException, 'Error in snappy_compress: %d' % cresult
  return cbuf.raw[:clen.value]

def uncompress(s):
  '''Uncompress a snappy compressed string.'''
  ulen = c_int(0)
  cresult = __snappy_uncompressed_length(s, len(s), byref(ulen))
  if cresult != 0:
    raise SnappyException, 'Error in snappy_uncompressed_length: %d' % cresult
  ubuf = create_string_buffer(ulen.value)
  __snappy_uncompress(s, len(s), ubuf, byref(ulen))
  if cresult != 0:
    raise SnappyException, 'Error in snappy_uncompress: %d' % cresult
  return ubuf.raw

decompress = uncompress

Original issue reported on code.google.com by mmoel...@mxs.de on 28 Mar 2014 at 7:31

[GoogleCodeExporter]

Hi,

I don't understand. Other operating systems than what?

Snappy does not ship any Python. Did you mean to file this against one of the 
Python bindings?

Original comment by se...@google.com on 28 Mar 2014 at 7:39

[GoogleCodeExporter]

sorry - my bad -- this page is listed as support page for the python 
ctypes-snappy pip module.

Original comment by mmoel...@mxs.de on 28 Mar 2014 at 7:41

[GoogleCodeExporter]

Original comment by se...@google.com on 28 Mar 2014 at 7:45

• Changed state: Invalid