Botan  1.10.9
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

void send (const byte in[], size_t length)
 
void send (byte in)
 
void send (const MemoryRegion< byte > &in)
 
void send (const MemoryRegion< 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 184 of file bzip2.cpp.

184  :
185  small_mem(s), buffer(DEFAULT_BUFFERSIZE)
186  {
187  no_writes = true;
188  bz = 0;
189  }
size_t s
Definition: numthry.cpp:27
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 50 of file filter.h.

50 { 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 255 of file bzip2.cpp.

References Botan::MemoryRegion< T >::begin(), Botan::Filter::send(), and Botan::MemoryRegion< T >::size().

256  {
257  if(no_writes) return;
258  bz->stream.next_in = 0;
259  bz->stream.avail_in = 0;
260 
261  int rc = BZ_OK;
262  while(rc != BZ_STREAM_END)
263  {
264  bz->stream.next_out = reinterpret_cast<char*>(buffer.begin());
265  bz->stream.avail_out = buffer.size();
266  rc = BZ2_bzDecompress(&(bz->stream));
267 
268  if(rc != BZ_OK && rc != BZ_STREAM_END)
269  {
270  clear();
271  throw Decoding_Error("Bzip_Decompression: Error finalizing");
272  }
273 
274  send(buffer, buffer.size() - bz->stream.avail_out);
275  }
276 
277  clear();
278  }
void send(const byte in[], size_t length)
Definition: filter.cpp:28
size_t size() const
Definition: secmem.h:29
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 
)
protectedinherited
Parameters
insome input for the filter
lengththe length of in

Definition at line 28 of file filter.cpp.

References Botan::MemoryRegion< T >::clear(), Botan::MemoryRegion< T >::size(), and Botan::Filter::write().

Referenced by Botan::PK_Encryptor_Filter::end_msg(), Botan::Zlib_Compression::end_msg(), Botan::Bzip_Compression::end_msg(), Botan::Hex_Encoder::end_msg(), Botan::Base64_Encoder::end_msg(), Botan::PK_Decryptor_Filter::end_msg(), end_msg(), Botan::Zlib_Decompression::end_msg(), Botan::PK_Signer_Filter::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::Zlib_Compression::write(), Botan::Bzip_Compression::write(), Botan::StreamCipher_Filter::write(), 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  }
virtual void write(const byte input[], size_t length)=0
size_t size() const
Definition: secmem.h:29
void Botan::Filter::send ( byte  in)
inlineprotectedinherited
Parameters
insome input for the filter

Definition at line 63 of file filter.h.

References Botan::Filter::send().

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

63 { send(&in, 1); }
void send(const byte in[], size_t length)
Definition: filter.cpp:28
void Botan::Filter::send ( const MemoryRegion< byte > &  in)
inlineprotectedinherited
Parameters
insome input for the filter

Definition at line 68 of file filter.h.

References Botan::Filter::send(), and Botan::MemoryRegion< T >::size().

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

68 { send(&in[0], in.size()); }
void send(const byte in[], size_t length)
Definition: filter.cpp:28
size_t size() const
Definition: secmem.h:29
void Botan::Filter::send ( const MemoryRegion< byte > &  in,
size_t  length 
)
inlineprotectedinherited
Parameters
insome input for the filter
lengththe number of bytes of in to send

Definition at line 74 of file filter.h.

75  {
76  send(&in[0], length);
77  }
void send(const byte in[], size_t length)
Definition: filter.cpp:28
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 241 of file bzip2.cpp.

Referenced by write().

242  {
243  clear();
244  bz = new Bzip_Stream;
245 
246  if(BZ2_bzDecompressInit(&(bz->stream), 0, small_mem) != BZ_OK)
247  throw Memory_Exhaustion();
248 
249  no_writes = true;
250  }
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 194 of file bzip2.cpp.

References Botan::MemoryRegion< T >::begin(), Botan::Filter::send(), Botan::MemoryRegion< T >::size(), and start_msg().

195  {
196  if(length) no_writes = false;
197 
198  char* input = reinterpret_cast<char*>(const_cast<byte*>(input_arr));
199 
200  bz->stream.next_in = input;
201  bz->stream.avail_in = length;
202 
203  while(bz->stream.avail_in != 0)
204  {
205  bz->stream.next_out = reinterpret_cast<char*>(buffer.begin());
206  bz->stream.avail_out = buffer.size();
207 
208  int rc = BZ2_bzDecompress(&(bz->stream));
209 
210  if(rc != BZ_OK && rc != BZ_STREAM_END)
211  {
212  clear();
213 
214  if(rc == BZ_DATA_ERROR)
215  throw Decoding_Error("Bzip_Decompression: Data integrity error");
216  else if(rc == BZ_DATA_ERROR_MAGIC)
217  throw Decoding_Error("Bzip_Decompression: Invalid input");
218  else if(rc == BZ_MEM_ERROR)
219  throw Memory_Exhaustion();
220  else
221  throw std::runtime_error("Bzip2 decompression: Unknown error");
222  }
223 
224  send(buffer, buffer.size() - bz->stream.avail_out);
225 
226  if(rc == BZ_STREAM_END)
227  {
228  size_t read_from_block = length - bz->stream.avail_in;
229  start_msg();
230  bz->stream.next_in = input + read_from_block;
231  bz->stream.avail_in = length - read_from_block;
232  input += read_from_block;
233  length -= read_from_block;
234  }
235  }
236  }
unsigned char byte
Definition: types.h:22
void send(const byte in[], size_t length)
Definition: filter.cpp:28
size_t size() const
Definition: secmem.h:29

The documentation for this class was generated from the following files: