Minimal safe wrapper around zstd-sys.

This crates provides a minimal translation of the zstd-sys methods. For a more comfortable high-level library, see the zstd crate.

Introduction

zstd, short for Zstandard, is a fast lossless compression algorithm, targeting real-time compression scenarios at zlib-level and better compression ratios. The zstd compression library provides in-memory compression and decompression functions. The library supports compression levels from 1 up to ZSTD_maxCLevel() which is 22. Levels >= 20, labeled --ultra, should be used with caution, as they require more memory.

Compression can be done in:

• a single step (described as Simple API)
• a single step, reusing a context (described as Explicit memory management)
• unbounded multiple steps (described as Streaming compression)

The compression ratio achievable on small data can be highly improved using compression with a dictionary in:

• a single step (described as Simple dictionary API)
• a single step, reusing a dictionary (described as Fast dictionary API)

Advanced experimental functions can be accessed using #define ZSTD_STATIC_LINKING_ONLY before including zstd.h. These APIs shall never be used with a dynamic library. They are not "stable", their definition may change in the future. Only static linking is allowed.