Zstandard (zstd) compression. More...

#include "config.h"
#include <stdio.h>
#include <zstd.h>
#include "private.h"
#include "mutt/lib.h"
#include "lib.h"

Include dependency graph for zstd.c:

Go to the source code of this file.

Data Structures
struct	ZstdComprData
	Private Zstandard Compression Data. More...

Macros
#define	MIN_COMP_LEVEL 1
	Minimum compression level for zstd.

#define	MAX_COMP_LEVEL 22
	Maximum compression level for zstd.

Functions
void	zstd_cdata_free (struct ZstdComprData **ptr)
	Free Zstandard Compression Data.

static struct ZstdComprData *	zstd_cdata_new (void)
	Create new Zstandard Compression Data.

static ComprHandle *	compr_zstd_open (short level)
	Open a compression context - Implements ComprOps::open() -.

static void *	compr_zstd_compress (ComprHandle handle, const char data, size_t dlen, size_t *clen)
	Compress header cache data - Implements ComprOps::compress() -.

static void *	compr_zstd_decompress (ComprHandle handle, const char cbuf, size_t clen)
	Decompress header cache data - Implements ComprOps::decompress() -.

static void	compr_zstd_close (ComprHandle **ptr)
	Close a compression context - Implements ComprOps::close() -.

Detailed Description

Zstandard (zstd) compression.

Authors

Tino Reichardt
Pietro Cerutti
Richard Russon

Copyright: This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 2 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see http://www.gnu.org/licenses/.

Definition in file zstd.c.

Macro Definition Documentation

◆ MIN_COMP_LEVEL

#define MIN_COMP_LEVEL 1

Minimum compression level for zstd.

Definition at line 39 of file zstd.c.

◆ MAX_COMP_LEVEL

#define MAX_COMP_LEVEL 22

Maximum compression level for zstd.

Definition at line 40 of file zstd.c.

Function Documentation

◆ zstd_cdata_free()

void zstd_cdata_free ( struct ZstdComprData ** ptr )

Free Zstandard Compression Data.

Parameters

ptr	Zstandard Compression Data to free

Definition at line 58 of file zstd.c.

{
  if (!ptr || !*ptr)
    return;
 
  struct ZstdComprData *cdata = *ptr;
  FREE(&cdata->buf);
 
  FREE(ptr);
}

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◆ zstd_cdata_new()

static struct ZstdComprData * zstd_cdata_new ( void )

static

Create new Zstandard Compression Data.

Return values

ptr	New Zstandard Compression Data

Definition at line 73 of file zstd.c.

{
  return MUTT_MEM_CALLOC(1, struct ZstdComprData);
}