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;
Inflator(BufferedTransformation *attachment=NULL, bool repeat=false, int autoSignalPropagation=-1)
RFC 1951 Decompressor.
Base class for all exceptions thrown by the library.
ErrorType
Error types or categories.
const char * what() const
Retrieves a C-string describing the exception.
Exception thrown when a truncated stream is encountered.
Exception(ErrorType errorType, const std::string &s)
Construct a new Exception.
Abstract base classes that provide a uniform interface to this library.
bool IsolatedFlush(bool hardFlush, bool blocking)
Flushes data buffered by this object, without signal propagation.
Classes and functions for secure memory allocations.
void IsolatedInitialize(const NameValuePairs ¶meters)
Initialize or reinitialize this object, without signal propagation.
Input data was received that did not conform to expected format.
bool operator<(const OID &lhs, const OID &rhs)
Compare two OIDs for ordering.
Exception thrown when an invalid distance is encountered.
Data structure used to store byte strings.
Implementation of BufferedTransformation's attachment interface.
unsigned short word16
16-bit unsigned datatype
unsigned char byte
8-bit unsigned datatype
DEFLATE decompressor (RFC 1951)
Provides auto signaling support.
BufferedTransformation * AttachedTransformation()
Retrieve attached transformation.
size_t Put2(const byte *inString, size_t length, int messageEnd, bool blocking)
Input multiple bytes for processing.
Crypto++ library namespace.
Exception thrown when a bad block is encountered.
Interface for retrieving values given their names.