D++ (DPP)
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dpp::zlibcontext Class Reference

This is an opaque class containing zlib library specific structures. This wraps the C pointers needed for zlib with unique_ptr and gives us a nice buffer abstraction so we don't need to wrestle with raw pointers. More...

#include <zlibcontext.h>

+ Collaboration diagram for dpp::zlibcontext:

Public Member Functions

 zlibcontext ()
 Initialise zlib struct via inflateInit() and size the buffer. More...
 
 ~zlibcontext ()
 Destroy zlib struct via inflateEnd() More...
 
exception_error_code decompress (const std::string &buffer, std::string &decompressed)
 Decompress zlib deflated buffer. More...
 

Public Attributes

z_stream * d_stream {}
 Zlib stream struct. The actual type is defined in zlib.h so is only defined in the implementation file. More...
 
std::vector< unsigned char > decomp_buffer {}
 ZLib decompression buffer. This is automatically set to DECOMP_BUFFER_SIZE bytes when the class is constructed. More...
 
uint64_t decompressed_total {}
 Total decompressed received bytes counter. More...
 

Detailed Description

This is an opaque class containing zlib library specific structures. This wraps the C pointers needed for zlib with unique_ptr and gives us a nice buffer abstraction so we don't need to wrestle with raw pointers.

Constructor & Destructor Documentation

◆ zlibcontext()

dpp::zlibcontext::zlibcontext ( )

Initialise zlib struct via inflateInit() and size the buffer.

◆ ~zlibcontext()

dpp::zlibcontext::~zlibcontext ( )

Destroy zlib struct via inflateEnd()

Member Function Documentation

◆ decompress()

exception_error_code dpp::zlibcontext::decompress ( const std::string &  buffer,
std::string &  decompressed 
)

Decompress zlib deflated buffer.

Parameters
bufferinput compressed stream
decompressedoutput decompressed content
Returns
an error code on error, or err_no_code_specified (0) on success

Member Data Documentation

◆ d_stream

z_stream* dpp::zlibcontext::d_stream {}

Zlib stream struct. The actual type is defined in zlib.h so is only defined in the implementation file.

◆ decomp_buffer

std::vector<unsigned char> dpp::zlibcontext::decomp_buffer {}

ZLib decompression buffer. This is automatically set to DECOMP_BUFFER_SIZE bytes when the class is constructed.

◆ decompressed_total

uint64_t dpp::zlibcontext::decompressed_total {}

Total decompressed received bytes counter.

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