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Overview
Comment:Add support for "brotli" compression to the zonefile module.
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SHA3-256: 3eb25b3fa5733b4418e7e2633be34b763e2c70342bb9c418a07c9f7d4b196fac
User & Date: dan 2018-02-17 20:22:23
Context
2018-02-19
14:27
Modify the zonefile format in order to avoid depending on the filesize to determine the extent of the final frame. See README.md for details. (check-in: 4dbe0cba user: dan tags: zonefile)
2018-02-17
20:22
Add support for "brotli" compression to the zonefile module. (check-in: 3eb25b3f user: dan tags: zonefile)
19:38
Add support for compression types "lz4" and "lz4hc" to the zonefile module. (check-in: bbe5b21f user: dan tags: zonefile)
Changes
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Changes to ext/zonefile/zonefile.c. 

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       + (((u32)aBuf[3]) <<  0);
}

#include <stdio.h>
#include <string.h>
#include <assert.h>

#ifdef SQLITE_HAVE_ZLIB 
#include <zlib.h>
static int zfZlibOpen(void **pp, u8 *aDict, int nDict){
  *pp = 0;
  return SQLITE_OK;
}
static void zfZlibClose(void *p){
}









static int zfZlibCompressBound(void *p, int nSrc){
  return (int)compressBound((uLong)nSrc) + 4;
}
static int zfZlibCompress(
  void *p, 
  u8 *aDest, int *pnDest, 
  const u8 *aSrc, int nSrc
................................................................................
){
  uLongf destLen = (uLongf)(*pnDest)-4;
  int rc = compress(&aDest[4], &destLen, aSrc, (uLong)nSrc);
  *pnDest = (int)(destLen+4);
  zonefilePut32(aDest, nSrc);
  return rc==Z_OK ? SQLITE_OK : SQLITE_ERROR;
}
static int zfZlibUncompressSize(
  void *p, 
  const u8 *aSrc, int nSrc
){
  return (int)zonefileGet32(aSrc);
}
static int zfZlibUncompress(
  void *p, 
  u8 *aDest, int nDest, 
  const u8 *aSrc, int nSrc
){
  uLongf destLen = (uLongf)nDest;
  int rc = uncompress(aDest, &destLen, &aSrc[4], (uLong)nSrc-4);
  return rc==Z_OK ? SQLITE_OK : SQLITE_ERROR;
}
#endif
#ifdef SQLITE_HAVE_ZSTD 
#include <zstd.h>
static int zfZstdOpen(void **pp, u8 *aDict, int nDict){
  *pp = 0;
  return SQLITE_OK;
}
static void zfZstdClose(void *p){
}
static int zfZstdCompressBound(void *p, int nSrc){
  return (int)ZSTD_compressBound((size_t)nSrc);
}
static int zfZstdCompress(
  void *p, 
  u8 *aDest, int *pnDest, 
  const u8 *aSrc, int nSrc
................................................................................
  if( ZDICT_isError(sz) ) return SQLITE_ERROR;
  pCmp->pCDict = ZSTD_createCDict(aDict, sz, 1);
  pCmp->pCCtx = ZSTD_createCCtx();
  if( pCmp->pCDict==0 || pCmp->pCCtx==0 ) return SQLITE_ERROR;
  *pnDict = (int)sz;
  return SQLITE_OK;
}
static int zfZstddictCompressBound(void *p, int nSrc){
  return (int)ZSTD_compressBound((size_t)nSrc);
}
static int zfZstddictCompress(
  void *p, 
  u8 *aDest, int *pnDest, 
  const u8 *aSrc, int nSrc
){
  ZfZstddict *pCmp = (ZfZstddict*)p;
  size_t szDest = (size_t)(*pnDest);
................................................................................
  rc = ZSTD_compress_usingCDict(
      pCmp->pCCtx, aDest, szDest, aSrc, (size_t)nSrc, pCmp->pCDict
  );
  if( ZSTD_isError(rc) ) return SQLITE_ERROR;
  *pnDest = (int)rc;
  return SQLITE_OK;
}
static int zfZstddictUncompressSize(void *p, const u8 *aSrc, int nSrc){
  return (int)ZSTD_getFrameContentSize(aSrc, (size_t)nSrc);
}
static int zfZstddictUncompress(
  void *p, 
  u8 *aDest, int nDest, 
  const u8 *aSrc, int nSrc
){
  ZfZstddict *pCmp = (ZfZstddict*)p;
  size_t rc = ZSTD_decompress_usingDDict(
................................................................................
  return SQLITE_OK;
}
#endif

#ifdef SQLITE_HAVE_LZ4 
#include <lz4.h>
#include <lz4hc.h>
static int zfLz4Open(void **pp, u8 *aDict, int nDict){
  *pp = 0;
  return SQLITE_OK;
}
static void zfLz4Close(void *p){
}
static int zfLz4CompressBound(void *p, int nSrc){
  return (int)LZ4_compressBound((uLong)nSrc) + 4;
}
static int zfLz4Uncompress(
  void *p, 
  u8 *aDest, int nDest, 
  const u8 *aSrc, int nSrc
................................................................................
  int rc = LZ4_compress_default(
      (const char*)aSrc, (char*)&aDest[4], nSrc, (*pnDest - 4)
  );
  *pnDest = rc+4;
  zonefilePut32(aDest, nSrc);
  return rc==0 ? SQLITE_ERROR : SQLITE_OK;
}
static int zfLz4UncompressSize(void *p, const u8 *aSrc, int nSrc){
  return (int)zonefileGet32(aSrc);
}
static int zfLz4hcCompress(
  void *p, 
  u8 *aDest, int *pnDest, 
  const u8 *aSrc, int nSrc
){
  int rc = LZ4_compress_HC(
      (const char*)aSrc, (char*)&aDest[4], nSrc, *pnDest, 0
  );
  *pnDest = rc+4;
  zonefilePut32(aDest, nSrc);
  return rc==0 ? SQLITE_ERROR : SQLITE_OK;
}
#endif

































typedef struct ZonefileCompress ZonefileCompress;
static struct ZonefileCompress {
  int eType;
  const char *zName;
  int (*xOpen)(void**, u8 *aDict, int nDict);
  void (*xClose)(void*);
................................................................................
  int (*xUncompress)(void*, u8 *aDest, int nDest, const u8 *aSrc, int nSrc);
} aZonefileCompress[] = {
  { ZONEFILE_COMPRESSION_NONE,             "none",
    0, 0, 0, 0, 0, 0, 0
  },
#ifdef SQLITE_HAVE_ZSTD
  { ZONEFILE_COMPRESSION_ZSTD,             "zstd",
    zfZstdOpen, zfZstdClose, 
    0,
    zfZstdCompressBound, zfZstdCompress, 
    zfZstdUncompressSize, zfZstdUncompress
  },
  { ZONEFILE_COMPRESSION_ZSTD_GLOBAL_DICT, "zstd_global_dict",
    zfZstddictOpen, zfZstddictClose, 
    zfZstddictTrain,
    zfZstddictCompressBound, zfZstddictCompress, 
    zfZstddictUncompressSize, zfZstddictUncompress
  },
#endif /* SQLITE_HAVE_ZSTD */
#ifdef SQLITE_HAVE_ZLIB
  { ZONEFILE_COMPRESSION_ZLIB,             "zlib",
    zfZlibOpen, zfZlibClose, 
    0,
    zfZlibCompressBound, zfZlibCompress, 
    zfZlibUncompressSize, zfZlibUncompress
  },
#endif /* SQLITE_HAVE_ZLIB */
#ifdef SQLITE_HAVE_BROTLI
  { ZONEFILE_COMPRESSION_BROTLI,           "brotli",
    0, 0, 0, 0, 0, 0, 0



  },
#endif /* SQLITE_HAVE_BROTLI */
#ifdef SQLITE_HAVE_LZ4
  { ZONEFILE_COMPRESSION_LZ4,              "lz4",
    zfLz4Open, zfLz4Close, 
    0,
    zfLz4CompressBound, zfLz4Compress, 
    zfLz4UncompressSize, zfLz4Uncompress
  },
  { ZONEFILE_COMPRESSION_LZ4HC,            "lz4hc",
    zfLz4Open, zfLz4Close, 
    0,
    zfLz4CompressBound, zfLz4hcCompress, 
    zfLz4UncompressSize, zfLz4Uncompress
  },
#endif /* SQLITE_HAVE_LZ4 */
};

static ZonefileCompress *zonefileCompress(const char *zName){
  int i;
  for(i=0; i<sizeof(aZonefileCompress)/sizeof(aZonefileCompress[0]); i++){








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       + (((u32)aBuf[3]) <<  0);
}

#include <stdio.h>
#include <string.h>
#include <assert.h>



static int zfGenericOpen(void **pp, u8 *aDict, int nDict){
  *pp = 0;
  return SQLITE_OK;
}
static void zfGenericClose(void *p){
}
static int zfGenericUncompressSize(
  void *p, 
  const u8 *aSrc, int nSrc
){
  return (int)zonefileGet32(aSrc);
}

#ifdef SQLITE_HAVE_ZLIB 
#include <zlib.h>
static int zfZlibCompressBound(void *p, int nSrc){
  return (int)compressBound((uLong)nSrc) + 4;
}
static int zfZlibCompress(
  void *p, 
  u8 *aDest, int *pnDest, 
  const u8 *aSrc, int nSrc
................................................................................
){
  uLongf destLen = (uLongf)(*pnDest)-4;
  int rc = compress(&aDest[4], &destLen, aSrc, (uLong)nSrc);
  *pnDest = (int)(destLen+4);
  zonefilePut32(aDest, nSrc);
  return rc==Z_OK ? SQLITE_OK : SQLITE_ERROR;
}






static int zfZlibUncompress(
  void *p, 
  u8 *aDest, int nDest, 
  const u8 *aSrc, int nSrc
){
  uLongf destLen = (uLongf)nDest;
  int rc = uncompress(aDest, &destLen, &aSrc[4], (uLong)nSrc-4);
  return rc==Z_OK ? SQLITE_OK : SQLITE_ERROR;
}
#endif
#ifdef SQLITE_HAVE_ZSTD 
#include <zstd.h>






static int zfZstdCompressBound(void *p, int nSrc){
  return (int)ZSTD_compressBound((size_t)nSrc);
}
static int zfZstdCompress(
  void *p, 
  u8 *aDest, int *pnDest, 
  const u8 *aSrc, int nSrc
................................................................................
  if( ZDICT_isError(sz) ) return SQLITE_ERROR;
  pCmp->pCDict = ZSTD_createCDict(aDict, sz, 1);
  pCmp->pCCtx = ZSTD_createCCtx();
  if( pCmp->pCDict==0 || pCmp->pCCtx==0 ) return SQLITE_ERROR;
  *pnDict = (int)sz;
  return SQLITE_OK;
}



static int zfZstddictCompress(
  void *p, 
  u8 *aDest, int *pnDest, 
  const u8 *aSrc, int nSrc
){
  ZfZstddict *pCmp = (ZfZstddict*)p;
  size_t szDest = (size_t)(*pnDest);
................................................................................
  rc = ZSTD_compress_usingCDict(
      pCmp->pCCtx, aDest, szDest, aSrc, (size_t)nSrc, pCmp->pCDict
  );
  if( ZSTD_isError(rc) ) return SQLITE_ERROR;
  *pnDest = (int)rc;
  return SQLITE_OK;
}



static int zfZstddictUncompress(
  void *p, 
  u8 *aDest, int nDest, 
  const u8 *aSrc, int nSrc
){
  ZfZstddict *pCmp = (ZfZstddict*)p;
  size_t rc = ZSTD_decompress_usingDDict(
................................................................................
  return SQLITE_OK;
}
#endif

#ifdef SQLITE_HAVE_LZ4 
#include <lz4.h>
#include <lz4hc.h>






static int zfLz4CompressBound(void *p, int nSrc){
  return (int)LZ4_compressBound((uLong)nSrc) + 4;
}
static int zfLz4Uncompress(
  void *p, 
  u8 *aDest, int nDest, 
  const u8 *aSrc, int nSrc
................................................................................
  int rc = LZ4_compress_default(
      (const char*)aSrc, (char*)&aDest[4], nSrc, (*pnDest - 4)
  );
  *pnDest = rc+4;
  zonefilePut32(aDest, nSrc);
  return rc==0 ? SQLITE_ERROR : SQLITE_OK;
}



static int zfLz4hcCompress(
  void *p, 
  u8 *aDest, int *pnDest, 
  const u8 *aSrc, int nSrc
){
  int rc = LZ4_compress_HC(
      (const char*)aSrc, (char*)&aDest[4], nSrc, *pnDest, 0
  );
  *pnDest = rc+4;
  zonefilePut32(aDest, nSrc);
  return rc==0 ? SQLITE_ERROR : SQLITE_OK;
}
#endif

#ifdef SQLITE_HAVE_BROTLI 
#include <brotli/encode.h>
#include <brotli/decode.h>

static int zfBrotliCompressBound(void *p, int nSrc){
  return (int)BrotliEncoderMaxCompressedSize((size_t)nSrc) + 4;
}
static int zfBrotliCompress(
  void *p, 
  u8 *aDest, int *pnDest, 
  const u8 *aSrc, int nSrc
){
  size_t nDest = (size_t)*pnDest - 4;
  BROTLI_BOOL rc = BrotliEncoderCompress(
      BROTLI_DEFAULT_QUALITY, BROTLI_DEFAULT_WINDOW, BROTLI_DEFAULT_MODE,
      (size_t)nSrc, aSrc, &nDest, &aDest[4]
  );
  *pnDest = (int)nDest + 4;
  zonefilePut32(aDest, nSrc);
  return rc==0 ? SQLITE_ERROR : SQLITE_OK;
}
static int zfBrotliUncompress(
  void *p, 
  u8 *aDest, int nDest, 
  const u8 *aSrc, int nSrc
){
  size_t n = nDest;
  BrotliDecoderResult rc = BrotliDecoderDecompress(nSrc-4, &aSrc[4], &n, aDest);
  return rc==BROTLI_DECODER_RESULT_SUCCESS ? SQLITE_OK : SQLITE_ERROR;
}
#endif

typedef struct ZonefileCompress ZonefileCompress;
static struct ZonefileCompress {
  int eType;
  const char *zName;
  int (*xOpen)(void**, u8 *aDict, int nDict);
  void (*xClose)(void*);
................................................................................
  int (*xUncompress)(void*, u8 *aDest, int nDest, const u8 *aSrc, int nSrc);
} aZonefileCompress[] = {
  { ZONEFILE_COMPRESSION_NONE,             "none",
    0, 0, 0, 0, 0, 0, 0
  },
#ifdef SQLITE_HAVE_ZSTD
  { ZONEFILE_COMPRESSION_ZSTD,             "zstd",
    zfGenericOpen, zfGenericClose, 
    0,
    zfZstdCompressBound, zfZstdCompress, 
    zfZstdUncompressSize, zfZstdUncompress
  },
  { ZONEFILE_COMPRESSION_ZSTD_GLOBAL_DICT, "zstd_global_dict",
    zfZstddictOpen, zfZstddictClose, 
    zfZstddictTrain,
    zfZstdCompressBound, zfZstddictCompress, 
    zfZstdUncompressSize, zfZstddictUncompress
  },
#endif /* SQLITE_HAVE_ZSTD */
#ifdef SQLITE_HAVE_ZLIB
  { ZONEFILE_COMPRESSION_ZLIB,             "zlib",
    zfGenericOpen, zfGenericClose, 
    0,
    zfZlibCompressBound, zfZlibCompress, 
    zfGenericUncompressSize, zfZlibUncompress
  },
#endif /* SQLITE_HAVE_ZLIB */
#ifdef SQLITE_HAVE_BROTLI
  { ZONEFILE_COMPRESSION_BROTLI,           "brotli",
    zfGenericOpen, zfGenericClose, 
    0,
    zfBrotliCompressBound, zfBrotliCompress, 
    zfGenericUncompressSize, zfBrotliUncompress
  },
#endif /* SQLITE_HAVE_BROTLI */
#ifdef SQLITE_HAVE_LZ4
  { ZONEFILE_COMPRESSION_LZ4,              "lz4",
    zfGenericOpen, zfGenericClose, 
    0,
    zfLz4CompressBound, zfLz4Compress, 
    zfGenericUncompressSize, zfLz4Uncompress
  },
  { ZONEFILE_COMPRESSION_LZ4HC,            "lz4hc",
    zfGenericOpen, zfGenericClose, 
    0,
    zfLz4CompressBound, zfLz4hcCompress, 
    zfGenericUncompressSize, zfLz4Uncompress
  },
#endif /* SQLITE_HAVE_LZ4 */
};

static ZonefileCompress *zonefileCompress(const char *zName){
  int i;
  for(i=0; i<sizeof(aZonefileCompress)/sizeof(aZonefileCompress[0]); i++){

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