Hypertable::StringCompressorPrefix Class Reference

A class to prefix-compress strings. More...

#include <StringCompressorPrefix.h>

Collaboration diagram for Hypertable::StringCompressorPrefix:

Public Member Functions
virtual void	reset ()
	Clears the internal state. More...
virtual void	add (const char *str)
	Adds (and compresses) a string. More...
virtual size_t	length () const
	Retrieves the length of the compressed string. More...
virtual size_t	length_uncompressed () const
	Retrieves the length of the uncompressed string. More...
virtual void	write (uint8_t *buf) const
	Writes the compressed string to a buffer. More...
virtual void	write_uncompressed (uint8_t *buf) const
	Writes the uncompressed string to a buffer. More...

Private Member Functions
size_t	get_prefix_length (const char *str, size_t len) const
	Helper function returning the prefix length of a new string. More...

Private Attributes
size_t	m_compressed_len
	Length of the compressed string. More...
size_t	m_uncompressed_len
	Length of the uncompressed string. More...
String	m_last_string
	The previously added (uncompressed) string. More...
DynamicBuffer	m_compressed_string
	Dynamic array holding the compressed string. More...

Detailed Description

A class to prefix-compress strings.

Definition at line 43 of file StringCompressorPrefix.h.

Member Function Documentation

virtual void Hypertable::StringCompressorPrefix::add ( const char *  str )

inlinevirtual

Adds (and compresses) a string.

Keeps a copy of the uncompressed string for the next invocation of this function. The compressed string can be retrieved with write.

Parameters

str	A null-terminated string to compress

Definition at line 57 of file StringCompressorPrefix.h.

size_t Hypertable::StringCompressorPrefix::get_prefix_length ( const char *  str, size_t  len  ) const

inlineprivate

Helper function returning the prefix length of a new string.

Definition at line 102 of file StringCompressorPrefix.h.

virtual size_t Hypertable::StringCompressorPrefix::length ( ) const

inlinevirtual

Retrieves the length of the compressed string.

Definition at line 79 of file StringCompressorPrefix.h.

virtual size_t Hypertable::StringCompressorPrefix::length_uncompressed ( ) const

inlinevirtual

Retrieves the length of the uncompressed string.

Definition at line 84 of file StringCompressorPrefix.h.

virtual void Hypertable::StringCompressorPrefix::reset ( )

inlinevirtual

Clears the internal state.

Definition at line 46 of file StringCompressorPrefix.h.

virtual void Hypertable::StringCompressorPrefix::write ( uint8_t *  buf ) const

inlinevirtual

Writes the compressed string to a buffer.

Definition at line 89 of file StringCompressorPrefix.h.

virtual void Hypertable::StringCompressorPrefix::write_uncompressed ( uint8_t *  buf ) const

inlinevirtual

Writes the uncompressed string to a buffer.

Definition at line 94 of file StringCompressorPrefix.h.

Member Data Documentation

size_t Hypertable::StringCompressorPrefix::m_compressed_len

private

Length of the compressed string.

Definition at line 113 of file StringCompressorPrefix.h.

DynamicBuffer Hypertable::StringCompressorPrefix::m_compressed_string

private

Dynamic array holding the compressed string.

Definition at line 122 of file StringCompressorPrefix.h.

String Hypertable::StringCompressorPrefix::m_last_string

private

The previously added (uncompressed) string.

Definition at line 119 of file StringCompressorPrefix.h.

size_t Hypertable::StringCompressorPrefix::m_uncompressed_len

private

Length of the uncompressed string.

Definition at line 116 of file StringCompressorPrefix.h.

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

• /home/doug/src/hypertable/src/cc/Common/StringCompressorPrefix.h