6#ifndef CRYPTOPP_ZINFLATE_H
7#define CRYPTOPP_ZINFLATE_H
21 : m_store(store), m_buffer(0), m_bitsBuffered(0) {}
22 unsigned int BitsBuffered()
const {
return m_bitsBuffered;}
23 unsigned long PeekBuffer()
const {
return m_buffer;}
24 bool FillBuffer(
unsigned int length);
25 unsigned long PeekBits(
unsigned int length);
26 void SkipBits(
unsigned int length);
27 unsigned long GetBits(
unsigned int length);
31 unsigned long m_buffer;
32 unsigned int m_bitsBuffered;
42 typedef unsigned int code_t;
43 typedef unsigned int value_t;
44 enum {MAX_CODE_BITS =
sizeof(code_t)*8};
48 HuffmanDecoder() : m_maxCodeBits(0), m_cacheBits(0), m_cacheMask(0), m_normalizedCacheMask(0) {}
49 HuffmanDecoder(
const unsigned int *codeBitLengths,
unsigned int nCodes)
50 : m_maxCodeBits(0), m_cacheBits(0), m_cacheMask(0), m_normalizedCacheMask(0)
51 {Initialize(codeBitLengths, nCodes);}
53 void Initialize(
const unsigned int *codeBitLengths,
unsigned int nCodes);
54 unsigned int Decode(code_t code, value_t &value)
const;
62 CodeInfo(code_t code=0,
unsigned int len=0, value_t value=0) : code(code), len(len), value(value) {}
63 inline bool operator<(
const CodeInfo &rhs)
const {
return code < rhs.code;}
75 const CodeInfo *begin;
84 static code_t NormalizeCode(code_t code,
unsigned int codeBits);
85 void FillCacheEntry(LookupEntry &entry, code_t normalizedCode)
const;
87 unsigned int m_maxCodeBits, m_cacheBits, m_cacheMask, m_normalizedCacheMask;
88 std::vector<CodeInfo, AllocatorWithCleanup<CodeInfo> > m_codeToValue;
89 mutable std::vector<LookupEntry, AllocatorWithCleanup<LookupEntry> > m_cache;
117 size_t Put2(
const byte *inString,
size_t length,
int messageEnd,
bool blocking);
120 virtual unsigned int GetLog2WindowSize()
const {
return 15;}
126 virtual unsigned int MaxPrestreamHeaderSize()
const {
return 0;}
127 virtual void ProcessPrestreamHeader() {}
128 virtual void ProcessDecompressedData(
const byte *
string,
size_t length)
130 virtual unsigned int MaxPoststreamTailSize()
const {
return 0;}
131 virtual void ProcessPoststreamTail() {}
133 void ProcessInput(
bool flush);
137 void OutputByte(
byte b);
138 void OutputString(
const byte *
string,
size_t length);
139 void OutputPast(
unsigned int length,
unsigned int distance);
141 void CreateFixedDistanceDecoder();
142 void CreateFixedLiteralDecoder();
147 enum State {PRE_STREAM, WAIT_HEADER, DECODING_BODY, POST_STREAM, AFTER_END};
149 bool m_repeat, m_eof, m_wrappedAround;
152 enum NextDecode {LITERAL, LENGTH_BITS, DISTANCE, DISTANCE_BITS};
153 NextDecode m_nextDecode;
154 unsigned int m_literal, m_distance;
159 size_t m_current, m_lastFlush;
Provides auto signaling support.
Data structure used to store byte strings.
Base class for all exceptions thrown by the library.
Exception(ErrorType errorType, const std::string &s)
Construct a new Exception.
ErrorType
Error types or categories.
@ INVALID_DATA_FORMAT
Input data was received that did not conform to expected format.
const char * what() const
Retrieves a C-string describing the exception.
BufferedTransformation * AttachedTransformation()
Retrieve attached transformation.
Exception thrown when a bad block is encountered.
Exception thrown when an invalid distance is encountered.
Exception thrown when a truncated stream is encountered.
DEFLATE decompressor (RFC 1951)
void IsolatedInitialize(const NameValuePairs ¶meters)
Initialize or reinitialize this object, without signal propagation.
Inflator(BufferedTransformation *attachment=NULL, bool repeat=false, int autoSignalPropagation=-1)
RFC 1951 Decompressor.
size_t Put2(const byte *inString, size_t length, int messageEnd, bool blocking)
Input multiple bytes for processing.
bool IsolatedFlush(bool hardFlush, bool blocking)
Flushes data buffered by this object, without signal propagation.
Interface for retrieving values given their names.
Pointer that overloads operator ->
unsigned short word16
16-bit unsigned datatype
Abstract base classes that provide a uniform interface to this library.
Implementation of BufferedTransformation's attachment interface.
Crypto++ library namespace.
Classes and functions for secure memory allocations.