Add support for compression types "lz4" and "lz4hc" to the zonefile module.

FossilOrigin-Name: bbe5b21ffab3cd312680ca9f179c5847790c17fb91d4174985153c6c398d48e3

ext/zonefile/zonefile.c

@@ -132,10 +132,7 @@ static int zfZstdCompress(
   *pnDest = (int)rc;
   return SQLITE_OK;
 }
-static int zfZstdUncompressSize(
-  void *p, 
-  const u8 *aSrc, int nSrc
-){
+static int zfZstdUncompressSize(void *p, const u8 *aSrc, int nSrc){
   return (int)ZSTD_getFrameContentSize(aSrc, (size_t)nSrc);
 }
 static int zfZstdUncompress(
@@ -219,10 +216,7 @@ static int zfZstddictCompress(
   *pnDest = (int)rc;
   return SQLITE_OK;
 }
-static int zfZstddictUncompressSize(
-  void *p, 
-  const u8 *aSrc, int nSrc
-){
+static int zfZstddictUncompressSize(void *p, const u8 *aSrc, int nSrc){
   return (int)ZSTD_getFrameContentSize(aSrc, (size_t)nSrc);
 }
 static int zfZstddictUncompress(
@@ -239,6 +233,57 @@ static int zfZstddictUncompress(
 }
 #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_decompress_safe(
+      (const char*)&aSrc[4], (char*)aDest, nSrc-4, nDest
+  );
+  return rc==nDest ? SQLITE_OK : SQLITE_ERROR;
+}
+static int zfLz4Compress(
+  void *p, 
+  u8 *aDest, int *pnDest, 
+  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;
@@ -283,10 +328,16 @@ static struct ZonefileCompress {
 #endif /* SQLITE_HAVE_BROTLI */
 #ifdef SQLITE_HAVE_LZ4
   { ZONEFILE_COMPRESSION_LZ4,              "lz4",
-    0, 0, 0, 0, 0, 0, 0
+    zfLz4Open, zfLz4Close, 
+    0,
+    zfLz4CompressBound, zfLz4Compress, 
+    zfLz4UncompressSize, zfLz4Uncompress
   },
   { ZONEFILE_COMPRESSION_LZ4HC,            "lz4hc",
-    0, 0, 0, 0, 0, 0, 0
+    zfLz4Open, zfLz4Close, 
+    0,
+    zfLz4CompressBound, zfLz4hcCompress, 
+    zfLz4UncompressSize, zfLz4Uncompress
   },
 #endif /* SQLITE_HAVE_LZ4 */
 };
@@ -634,19 +685,21 @@ static int zonefileAppendCompressed(
   ZonefileBuffer *pFrom           /* Input buffer */
 ){
   int rc = SQLITE_OK;
-  if( pMethod->eType==ZONEFILE_COMPRESSION_NONE ){
-    if( zonefileBufferGrow(pCtx, pTo, pFrom->n) ){
-      rc = SQLITE_ERROR;
+  if( pFrom->n ){
+    if( pMethod->eType==ZONEFILE_COMPRESSION_NONE ){
+      if( zonefileBufferGrow(pCtx, pTo, pFrom->n) ){
+        rc = SQLITE_ERROR;
+      }else{
+        zonefileAppendBlob(pTo, pFrom->a, pFrom->n);
+      }
     }else{
-      zonefileAppendBlob(pTo, pFrom->a, pFrom->n);
-    }
-  }else{
-    int nReq = pMethod->xCompressBound(pCmp, pFrom->n);
-    if( zonefileBufferGrow(pCtx, pTo, nReq) ) return SQLITE_ERROR;
-    rc = pMethod->xCompress(pCmp, &pTo->a[pTo->n], &nReq, pFrom->a, pFrom->n);
-    pTo->n += nReq;
-    if( rc!=SQLITE_OK ){
-      return rc;
+      int nReq = pMethod->xCompressBound(pCmp, pFrom->n);
+      if( zonefileBufferGrow(pCtx, pTo, nReq) ) return SQLITE_ERROR;
+      rc = pMethod->xCompress(pCmp, &pTo->a[pTo->n], &nReq, pFrom->a, pFrom->n);
+      pTo->n += nReq;
+      if( rc!=SQLITE_OK ){
+        return rc;
+      }
     }
   }
   return SQLITE_OK;
@@ -1282,7 +1335,7 @@ static int zonefileLoadIndex(
 
   *paIdx = aIdx;
   *pnIdx = nIdx;
-  return SQLITE_OK;
+  return rc;
 }
 
 

manifest

@@ -1,5 +1,5 @@
-C Add\ssupport\sfor\scompression\smethods\s"zstd"\sand\s"zstd_global_dict".
-D 2018-02-17T18:33:43.145
+C Add\ssupport\sfor\scompression\stypes\s"lz4"\sand\s"lz4hc"\sto\sthe\szonefile\smodule.
+D 2018-02-17T19:38:02.757
 F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
 F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
 F Makefile.in 7a3f714b4fcf793108042b7b0a5c720b0b310ec84314d61ba7f3f49f27e550ea
@@ -409,7 +409,7 @@ F ext/userauth/sqlite3userauth.h 7f3ea8c4686db8e40b0a0e7a8e0b00fac13aa7a3
 F ext/userauth/user-auth.txt e6641021a9210364665fe625d067617d03f27b04
 F ext/userauth/userauth.c 3410be31283abba70255d71fd24734e017a4497f
 F ext/zonefile/README.md 387ad2b748e98eeea21fd4dbb609fefe313263fadb3fc6c01c512b4c95e55ae4
-F ext/zonefile/zonefile.c 3954cdaeae3ce5018be5e75022cbd5d142245828a8396ae35db64c2b379f3205
+F ext/zonefile/zonefile.c cb0e2d294bc064bd995e9df7737636395e3101b17de688b2cf0e2159e561482c
 F ext/zonefile/zonefile1.test 0f84e56cd4f7b2c05443d1a2632c20ef635cc7f92de2868d92a2a6c09a9258ad
 F install-sh 9d4de14ab9fb0facae2f48780b874848cbf2f895 x
 F ltmain.sh 3ff0879076df340d2e23ae905484d8c15d5fdea8
@@ -1708,7 +1708,7 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
 F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
 F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
-P 72b8a7ef98d84460718378b9d17477599df39b4216015f8967674dd02b54b406
-R 3137d370c8b0ed559bfb7417aaf06af5
+P a993a50bb8d5a3bf7cf79e09204814e172ba0bf9b3949e81912ef83f0d4bb44e
+R 446a2537d684855afb526eb1141b7e7d
 U dan
-Z cfd4dcc32b639975b3448fc063f18d5e
+Z 61481f5925196a4938887596830579d3

manifest.uuid

@@ -1 +1 @@
-a993a50bb8d5a3bf7cf79e09204814e172ba0bf9b3949e81912ef83f0d4bb44e
+bbe5b21ffab3cd312680ca9f179c5847790c17fb91d4174985153c6c398d48e3