Import SQLite 3.10.2.

third_party/sqlite/src/ext/misc/compress.c

 /*
 ** 2014-06-13
 **
 ** The author disclaims copyright to this source code.  In place of
 ** a legal notice, here is a blessing:
 **
 **    May you do good and not evil.
 **    May you find forgiveness for yourself and forgive others.
 **    May you share freely, never taking more than you give.
 **
@@ skipping 20 matching lines @@
 static void compressFunc(
   sqlite3_context *context,
   int argc,
   sqlite3_value **argv
 ){
   const unsigned char *pIn;
   unsigned char *pOut;
   unsigned int nIn;
   unsigned long int nOut;
   unsigned char x[8];
+  int rc;
   int i, j;
 
   pIn = sqlite3_value_blob(argv[0]);
   nIn = sqlite3_value_bytes(argv[0]);
   nOut = 13 + nIn + (nIn+999)/1000;
   pOut = sqlite3_malloc( nOut+5 );
   for(i=4; i>=0; i--){
     x[i] = (nIn >> (7*(4-i)))&0x7f;
   }
   for(i=0; i<4 && x[i]==0; i++){}
   for(j=0; i<=4; i++, j++) pOut[j] = x[i];
   pOut[j-1] |= 0x80;
-  compress(&pOut[j], &nOut, pIn, nIn);
-  sqlite3_result_blob(context, pOut, nOut+j, sqlite3_free);
+  rc = compress(&pOut[j], &nOut, pIn, nIn);
+  if( rc==Z_OK ){
+    sqlite3_result_blob(context, pOut, nOut+j, sqlite3_free);
+  }else{
+    sqlite3_free(pOut);
+  }
 }
 
 /*
 ** Implementation of the "uncompress(X)" SQL function.  The argument X
 ** is a blob which was obtained from compress(Y).  The output will be
 ** the value Y.
 */
 static void uncompressFunc(
   sqlite3_context *context,
   int argc,
@@ skipping 10 matching lines @@
   nIn = sqlite3_value_bytes(argv[0]);
   nOut = 0;
   for(i=0; i<nIn && i<5; i++){
     nOut = (nOut<<7) | (pIn[i]&0x7f);
     if( (pIn[i]&0x80)!=0 ){ i++; break; }
   }
   pOut = sqlite3_malloc( nOut+1 );
   rc = uncompress(pOut, &nOut, &pIn[i], nIn-i);
   if( rc==Z_OK ){
     sqlite3_result_blob(context, pOut, nOut, sqlite3_free);
+  }else{
+    sqlite3_free(pOut);
   }
 }
 
 
 #ifdef _WIN32
 __declspec(dllexport)
 #endif
 int sqlite3_compress_init(
   sqlite3 *db, 
   char **pzErrMsg, 
   const sqlite3_api_routines *pApi
 ){
   int rc = SQLITE_OK;
   SQLITE_EXTENSION_INIT2(pApi);
   (void)pzErrMsg;  /* Unused parameter */
   rc = sqlite3_create_function(db, "compress", 1, SQLITE_UTF8, 0,
                                compressFunc, 0, 0);
   if( rc==SQLITE_OK ){
     rc = sqlite3_create_function(db, "uncompress", 1, SQLITE_UTF8, 0,
                                  uncompressFunc, 0, 0);
   }
   return rc;
 }