open()

Open a compression context. More...

Collaboration diagram for open():

Functions
static ComprHandle *	compr_lz4_open (short level)
	Open a compression context - Implements ComprOps::open() -.
static ComprHandle *	compr_zlib_open (short level)
	Open a compression context - Implements ComprOps::open() -.
static ComprHandle *	compr_zstd_open (short level)
	Open a compression context - Implements ComprOps::open() -.

Detailed Description

Open a compression context.

Parameters

[in]

level

The compression level

Return values

ptr	Success, Compression private data
NULL	Otherwise

Function Documentation

compr_lz4_open()

static ComprHandle * compr_lz4_open ( short  level )

static

Open a compression context - Implements ComprOps::open() -.

Definition at line 79 of file lz4.c.

{
  struct Lz4ComprData *cdata = lz4_cdata_new();
 
  cdata->buf = mutt_mem_calloc(1, LZ4_compressBound(1024 * 32));
 
  if ((level < MIN_COMP_LEVEL) || (level > MAX_COMP_LEVEL))
  {
    mutt_debug(LL_DEBUG1, "The compression level for %s should be between %d and %d",
               compr_lz4_ops.name, MIN_COMP_LEVEL, MAX_COMP_LEVEL);
    level = MIN_COMP_LEVEL;
  }
 
  cdata->level = level;
 
  // Return an opaque pointer
  return (ComprHandle *) cdata;
}

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compr_zlib_open()

static ComprHandle * compr_zlib_open ( short  level )

static

Open a compression context - Implements ComprOps::open() -.

Definition at line 79 of file zlib.c.

{
  struct ZlibComprData *cdata = zlib_cdata_new();
 
  cdata->buf = mutt_mem_calloc(1, compressBound(1024 * 32));
 
  if ((level < MIN_COMP_LEVEL) || (level > MAX_COMP_LEVEL))
  {
    mutt_debug(LL_DEBUG1, "The compression level for %s should be between %d and %d",
               compr_zlib_ops.name, MIN_COMP_LEVEL, MAX_COMP_LEVEL);
    level = MIN_COMP_LEVEL;
  }
 
  cdata->level = level;
 
  // Return an opaque pointer
  return (ComprHandle *) cdata;
}

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compr_zstd_open()

static ComprHandle * compr_zstd_open ( short  level )

static

Open a compression context - Implements ComprOps::open() -.

Definition at line 81 of file zstd.c.

{
  struct ZstdComprData *cdata = zstd_cdata_new();
 
  cdata->buf = mutt_mem_calloc(1, ZSTD_compressBound(1024 * 128));
  cdata->cctx = ZSTD_createCCtx();
  cdata->dctx = ZSTD_createDCtx();
 
  if (!cdata->cctx || !cdata->dctx)
  {
    // LCOV_EXCL_START
    ZSTD_freeCCtx(cdata->cctx);
    ZSTD_freeDCtx(cdata->dctx);
    zstd_cdata_free(&cdata);
    return NULL;
    // LCOV_EXCL_STOP
  }
 
  if ((level < MIN_COMP_LEVEL) || (level > MAX_COMP_LEVEL))
  {
    mutt_debug(LL_DEBUG1, "The compression level for %s should be between %d and %d",
               compr_zstd_ops.name, MIN_COMP_LEVEL, MAX_COMP_LEVEL);
    level = MIN_COMP_LEVEL;
  }
 
  cdata->level = level;
 
  // Return an opaque pointer
  return (ComprHandle *) cdata;
}

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