Botan  1.11.4
Public Member Functions | Protected Member Functions | List of all members
Botan::Bzip_Decompression Class Reference

#include <bzip2.h>

Inheritance diagram for Botan::Bzip_Decompression:
Botan::Filter

Public Member Functions

virtual bool attachable ()
 
 Bzip_Decompression (bool=false)
 
void end_msg ()
 
std::string name () const
 
void start_msg ()
 
void write (const byte input[], size_t length)
 
 ~Bzip_Decompression ()
 

Protected Member Functions

virtual void send (const byte in[], size_t length)
 
void send (byte in)
 
void send (const secure_vector< byte > &in)
 
void send (const std::vector< byte > &in)
 
void send (const secure_vector< byte > &in, size_t length)
 
void send (const std::vector< byte > &in, size_t length)
 

Detailed Description

Bzip Decompression Filter

Definition at line 43 of file bzip2.h.

Constructor & Destructor Documentation

Botan::Bzip_Decompression::Bzip_Decompression ( bool  s = false)

Definition at line 186 of file bzip2.cpp.

187  :
188  small_mem(s), buffer(DEFAULT_BUFFERSIZE)
189  {
190  no_writes = true;
191  bz = 0;
}
Botan::Bzip_Decompression::~Bzip_Decompression ( )
inline

Definition at line 53 of file bzip2.h.

53 { clear(); }

Member Function Documentation

virtual bool Botan::Filter::attachable ( )
inlinevirtualinherited

Check whether this filter is an attachable filter.

Returns
true if this filter is attachable, false otherwise

Reimplemented in Botan::SecureQueue, and Botan::DataSink.

Definition at line 52 of file filter.h.

52 { return true; }
void Botan::Bzip_Decompression::end_msg ( )
virtual

Notify that the current message is finished; flush buffers and do end-of-message processing (if any).

Reimplemented from Botan::Filter.

Definition at line 257 of file bzip2.cpp.

References Botan::Filter::send().

258  {
259  if(no_writes) return;
260  bz->stream.next_in = 0;
261  bz->stream.avail_in = 0;
262 
263  int rc = BZ_OK;
264  while(rc != BZ_STREAM_END)
265  {
266  bz->stream.next_out = reinterpret_cast<char*>(&buffer[0]);
267  bz->stream.avail_out = buffer.size();
268  rc = BZ2_bzDecompress(&(bz->stream));
269 
270  if(rc != BZ_OK && rc != BZ_STREAM_END)
271  {
272  clear();
273  throw Decoding_Error("Bzip_Decompression: Error finalizing");
274  }
275 
276  send(buffer, buffer.size() - bz->stream.avail_out);
277  }
278 
279  clear();
280  }
std::string Botan::Bzip_Decompression::name ( ) const
inlinevirtual
Returns
descriptive name for this filter

Implements Botan::Filter.

Definition at line 46 of file bzip2.h.

46 { return "Bzip_Decompression"; }
void Botan::Filter::send ( const byte  in[],
size_t  length 
)
protectedvirtualinherited
Parameters
insome input for the filter
lengththe length of in

Reimplemented in Botan::Threaded_Fork.

Definition at line 28 of file filter.cpp.

References Botan::Filter::write().

Referenced by Botan::PK_Encryptor_Filter::end_msg(), Botan::Zlib_Compression::end_msg(), Botan::Bzip_Compression::end_msg(), Botan::Lzma_Compression::end_msg(), Botan::Hex_Encoder::end_msg(), Botan::Base64_Encoder::end_msg(), Botan::PK_Decryptor_Filter::end_msg(), end_msg(), Botan::PK_Signer_Filter::end_msg(), Botan::Lzma_Decompression::end_msg(), Botan::Zlib_Decompression::end_msg(), Botan::Hex_Decoder::end_msg(), Botan::Base64_Decoder::end_msg(), Botan::PK_Verifier_Filter::end_msg(), Botan::Hash_Filter::end_msg(), Botan::MAC_Filter::end_msg(), Botan::Bzip_Compression::flush(), Botan::Zlib_Compression::flush(), Botan::Lzma_Compression::flush(), Botan::Zlib_Compression::write(), Botan::Bzip_Compression::write(), Botan::Lzma_Compression::write(), Botan::StreamCipher_Filter::write(), write(), Botan::Lzma_Decompression::write(), Botan::Zlib_Decompression::write(), Botan::Hex_Decoder::write(), and Botan::Base64_Decoder::write().

29  {
30  bool nothing_attached = true;
31  for(size_t j = 0; j != total_ports(); ++j)
32  if(next[j])
33  {
34  if(write_queue.size())
35  next[j]->write(&write_queue[0], write_queue.size());
36  next[j]->write(input, length);
37  nothing_attached = false;
38  }
39 
40  if(nothing_attached)
41  write_queue += std::make_pair(input, length);
42  else
43  write_queue.clear();
44  }
void Botan::Filter::send ( byte  in)
inlineprotectedinherited
Parameters
insome input for the filter

Definition at line 65 of file filter.h.

References Botan::Filter::send().

Referenced by Botan::Filter::send().

65 { send(&in, 1); }
void Botan::Filter::send ( const secure_vector< byte > &  in)
inlineprotectedinherited
Parameters
insome input for the filter

Definition at line 70 of file filter.h.

References Botan::Filter::send().

Referenced by Botan::Filter::send().

70 { send(&in[0], in.size()); }
void Botan::Filter::send ( const std::vector< byte > &  in)
inlineprotectedinherited
Parameters
insome input for the filter

Definition at line 75 of file filter.h.

References Botan::Filter::send().

Referenced by Botan::Filter::send().

75 { send(&in[0], in.size()); }
void Botan::Filter::send ( const secure_vector< byte > &  in,
size_t  length 
)
inlineprotectedinherited
Parameters
insome input for the filter
lengththe number of bytes of in to send

Definition at line 81 of file filter.h.

82  {
83  send(&in[0], length);
84  }
void Botan::Filter::send ( const std::vector< byte > &  in,
size_t  length 
)
inlineprotectedinherited
Parameters
insome input for the filter
lengththe number of bytes of in to send

Definition at line 90 of file filter.h.

91  {
92  send(&in[0], length);
93  }
void Botan::Bzip_Decompression::start_msg ( )
virtual

Start a new message. Must be closed by end_msg() before another message can be started.

Reimplemented from Botan::Filter.

Definition at line 243 of file bzip2.cpp.

Referenced by write().

244  {
245  clear();
246  bz = new Bzip_Stream;
247 
248  if(BZ2_bzDecompressInit(&(bz->stream), 0, small_mem) != BZ_OK)
249  throw Memory_Exhaustion();
250 
251  no_writes = true;
252  }
void Botan::Bzip_Decompression::write ( const byte  input[],
size_t  length 
)
virtual

Write a portion of a message to this filter.

Parameters
inputthe input as a byte array
lengththe length of the byte array input

Implements Botan::Filter.

Definition at line 196 of file bzip2.cpp.

References Botan::Filter::send(), and start_msg().

197  {
198  if(length) no_writes = false;
199 
200  char* input = reinterpret_cast<char*>(const_cast<byte*>(input_arr));
201 
202  bz->stream.next_in = input;
203  bz->stream.avail_in = length;
204 
205  while(bz->stream.avail_in != 0)
206  {
207  bz->stream.next_out = reinterpret_cast<char*>(&buffer[0]);
208  bz->stream.avail_out = buffer.size();
209 
210  int rc = BZ2_bzDecompress(&(bz->stream));
211 
212  if(rc != BZ_OK && rc != BZ_STREAM_END)
213  {
214  clear();
215 
216  if(rc == BZ_DATA_ERROR)
217  throw Decoding_Error("Bzip_Decompression: Data integrity error");
218  else if(rc == BZ_DATA_ERROR_MAGIC)
219  throw Decoding_Error("Bzip_Decompression: Invalid input");
220  else if(rc == BZ_MEM_ERROR)
221  throw Memory_Exhaustion();
222  else
223  throw std::runtime_error("Bzip2 decompression: Unknown error");
224  }
225 
226  send(buffer, buffer.size() - bz->stream.avail_out);
227 
228  if(rc == BZ_STREAM_END)
229  {
230  size_t read_from_block = length - bz->stream.avail_in;
231  start_msg();
232  bz->stream.next_in = input + read_from_block;
233  bz->stream.avail_in = length - read_from_block;
234  input += read_from_block;
235  length -= read_from_block;
236  }
237  }
238  }
The documentation for this class was generated from the following files:
Generated on Wed May 1 2013 08:42:18 for Botan by   doxygen 1.8.3.1