C++ (Cpp) tor_zlib_state_size_precalc Examples

Example #1

File: torgzip.c Project: 1234max/tor

/** Construct and return a tor_zlib_state_t object using <b>method</b>.  If
 * <b>compress</b>, it's for compression; otherwise it's for
 * decompression. */
tor_zlib_state_t *
tor_zlib_new(int compress, compress_method_t method,
             zlib_compression_level_t compression_level)
{
  tor_zlib_state_t *out;
  int bits, memlevel;

  if (method == GZIP_METHOD && !is_gzip_supported()) {
    /* Old zlib version don't support gzip in inflateInit2 */
    log_warn(LD_BUG, "Gzip not supported with zlib %s", ZLIB_VERSION);
    return NULL;
 }

 if (! compress) {
   /* use this setting for decompression, since we might have the
    * max number of window bits */
   compression_level = HIGH_COMPRESSION;
 }

 out = tor_malloc_zero(sizeof(tor_zlib_state_t));
 out->stream.zalloc = Z_NULL;
 out->stream.zfree = Z_NULL;
 out->stream.opaque = NULL;
 out->compress = compress;
 bits = method_bits(method, compression_level);
 memlevel = get_memlevel(compression_level);
 if (compress) {
   if (deflateInit2(&out->stream, Z_BEST_COMPRESSION, Z_DEFLATED,
                    bits, memlevel,
                    Z_DEFAULT_STRATEGY) != Z_OK)
     goto err;
 } else {
   if (inflateInit2(&out->stream, bits) != Z_OK)
     goto err;
 }
 out->allocation = tor_zlib_state_size_precalc(!compress, bits, memlevel);

 total_zlib_allocation += out->allocation;

 return out;

 err:
 tor_free(out);
 return NULL;
}

Example #2

File: torgzip.c Project: david415/tor

/** Construct and return a tor_zlib_state_t object using <b>method</b>.  If
 * <b>compress</b>, it's for compression; otherwise it's for
 * decompression. */
tor_zlib_state_t *
tor_zlib_new(int compress, compress_method_t method)
{
  tor_zlib_state_t *out;
  int bits;

  if (method == GZIP_METHOD && !is_gzip_supported()) {
    /* Old zlib version don't support gzip in inflateInit2 */
    log_warn(LD_BUG, "Gzip not supported with zlib %s", ZLIB_VERSION);
    return NULL;
 }

 out = tor_malloc_zero(sizeof(tor_zlib_state_t));
 out->stream.zalloc = Z_NULL;
 out->stream.zfree = Z_NULL;
 out->stream.opaque = NULL;
 out->compress = compress;
 bits = method_bits(method);
 if (compress) {
   if (deflateInit2(&out->stream, Z_BEST_COMPRESSION, Z_DEFLATED,
                    bits, 8, Z_DEFAULT_STRATEGY) != Z_OK)
     goto err;
 } else {
   if (inflateInit2(&out->stream, bits) != Z_OK)
     goto err;
 }
 out->allocation = tor_zlib_state_size_precalc(!compress, bits, 8);

 total_zlib_allocation += out->allocation;

 return out;

 err:
 tor_free(out);
 return NULL;
}