引文出处：http://wiki.dreamrunner.org/public_html/C-C++/Library-Notes/Snappy.html
Snappy
Table of Contents
Overview
- homepage: http://google.github.io/snappy/
- git: https://github.com/google/snappy
Snappy is a compression/decompression library. It does not aim for maximum compression, or compatibility with any other compression library; instead, it aims for very high speeds and reasonable compression
- Fast: Compression speeds at 250 MB/sec and beyond, with no assembler code. See “Performance” below.
- Stable: Over the last few years, Snappy has compressed and decompressed petabytes of data in Google’s production environment. The Snappy bitstream format is stable and will not change between versions.
- Robust: The Snappy decompressor is designed not to crash in the face of corrupted or malicious input.
Compile and install
./autogen.sh ./configure make # to static library ar rcs libsnappy.a ./*.o
Use
To use Snappy from your own C++ program, include the file “snappy.h” from your calling file, and link against the compiled library.
There are many ways to call Snappy, but the simplest possible is
snappy::Compress(input.data(), input.size(), &output); snappy::Uncompress(input.data(), input.size(), &output);
where “input” and “output” are both instances of std::string.
Example
#include#include #include using namespace std; int main() { string input = "Hello World"; string output; for (int i = 0; i < 5; ++i) { input += input; } snappy::Compress(input.data(), input.size(), &output); cout << "input size:" << input.size() << " output size:" << output.size() << endl; string output_uncom; snappy::Uncompress(output.data(), output.size(), &output_uncom); if (input == output_uncom) { cout << "Equal" << endl; } else { cout << "ERROR: not equal" << endl; } return 0; }
$ g++ -o example ./snappy-example.cc -I. -L. -lsnappy $ ./example input size:352 output size:32 Equal
Created: 2016-03-13 Sun 22:15
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