[sql] Rewrite sqlite patching "system".

third_party/sqlite/src/ext/fts2/fts2.c

 /* fts2 has a design flaw which can lead to database corruption (see
 ** below).  It is recommended not to use it any longer, instead use
 ** fts3 (or higher).  If you believe that your use of fts2 is safe,
 ** add -DSQLITE_ENABLE_BROKEN_FTS2=1 to your CFLAGS.
 */
 #if (!defined(SQLITE_CORE) || defined(SQLITE_ENABLE_FTS2)) \
         && !defined(SQLITE_ENABLE_BROKEN_FTS2)
 #error fts2 has a design flaw and has been deprecated.
 #endif
 /* The flaw is that fts2 uses the content table's unaliased rowid as
@@ skipping 306 matching lines @@
 #endif
 
 #include <assert.h>
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
 #include "fts2.h"
 #include "fts2_hash.h"
 #include "fts2_tokenizer.h"
 #include "sqlite3.h"
-#ifndef SQLITE_CORE 
+#ifndef SQLITE_CORE
 # include "sqlite3ext.h"
   SQLITE_EXTENSION_INIT1
 #endif
 
 
 /* TODO(shess) MAN, this thing needs some refactoring.  At minimum, it
 ** would be nice to order the file better, perhaps something along the
 ** lines of:
 **
 **  - utility functions
@@ skipping 3420 matching lines @@
      * sets isPrefix correctly, but since that code doesn't eat the '*', the
      * ICU tokenizer returns it as the next token.  So eat it here until a
      * better solution presents itself.
      */
     if( pQuery->nTerms>0 && nToken==1 && pSegment[iBegin]=='*' &&
         iEndLast==iBegin){
       pQuery->pTerms[pQuery->nTerms-1].isPrefix = 1;
       continue;
     }
     iEndLast = iEnd;
-    
+
     queryAdd(pQuery, pToken, nToken);
     if( !inPhrase && iBegin>0 && pSegment[iBegin-1]=='-' ){
       pQuery->pTerms[pQuery->nTerms-1].isNot = 1;
     }
     if( iEnd<nSegment && pSegment[iEnd]=='*' ){
       pQuery->pTerms[pQuery->nTerms-1].isPrefix = 1;
     }
     pQuery->pTerms[pQuery->nTerms-1].iPhrase = nTerm;
     if( inPhrase ){
       nTerm++;
@@ skipping 1766 matching lines @@
     if( pData==NULL ){
       rc = SQLITE_CORRUPT_BKPT;
       break;
     }
     rc = dlrInit(&dlReaders[i], DL_DEFAULT,
                  pData,
                  leavesReaderDataBytes(pReaders+i));
     if( rc!=SQLITE_OK ) break;
   }
   if( rc!=SQLITE_OK ){
-    while( i-->0 ){ 
+    while( i-->0 ){
       dlrDestroy(&dlReaders[i]);
     }
     return rc;
   }
 
   return leafWriterStepMerge(v, pWriter, pTerm, nTerm, dlReaders, nReaders);
 }
 
 /* Forward ref due to mutual recursion with segdirNextIndex(). */
 static int segmentMerge(fulltext_vtab *v, int iLevel);
@@ skipping 1328 matching lines @@
 */
 static void createDoclistResult(sqlite3_context *pContext,
                                 const char *pData, int nData){
   DataBuffer dump;
   DLReader dlReader;
   int rc;
 
   assert( pData!=NULL && nData>0 );
 
   rc = dlrInit(&dlReader, DL_DEFAULT, pData, nData);
-  if( rc!=SQLITE_OK ) return rc;
+  if( rc!=SQLITE_OK ) return;
   dataBufferInit(&dump, 0);
   for( ; rc==SQLITE_OK && !dlrAtEnd(&dlReader); rc = dlrStep(&dlReader) ){
     char buf[256];
     PLReader plReader;
 
     rc = plrInit(&plReader, &dlReader);
     if( rc!=SQLITE_OK ) break;
     if( DL_DEFAULT==DL_DOCIDS || plrAtEnd(&plReader) ){
       sqlite3_snprintf(sizeof(buf), buf, "[%lld] ", dlrDocid(&dlReader));
       dataBufferAppend(&dump, buf, strlen(buf));
@@ skipping 30 matching lines @@
 
       assert( dump.nData>0 );
       dump.nData--;                     /* Overwrite trailing space. */
       assert( dump.pData[dump.nData]==' ');
       dataBufferAppend(&dump, "]] ", 3);
     }
   }
   dlrDestroy(&dlReader);
   if( rc!=SQLITE_OK ){
     dataBufferDestroy(&dump);
-    return rc;
+    return;
   }
 
   assert( dump.nData>0 );
   dump.nData--;                     /* Overwrite trailing space. */
   assert( dump.pData[dump.nData]==' ');
   dump.pData[dump.nData] = '\0';
   assert( dump.nData>0 );
 
   /* Passes ownership of dump's buffer to pContext. */
   sqlite3_result_text(pContext, dump.pData, dump.nData, sqlite3_free);
   dump.pData = NULL;
   dump.nData = dump.nCapacity = 0;
-  return SQLITE_OK;
 }
 
 /* Implements dump_doclist() for use in inspecting the fts2 index from
 ** tests.  TEXT result containing a string representation of the
 ** doclist for the indicated term.  dump_doclist(t, term, level, idx)
 ** dumps the doclist for term from the segment specified by level, idx
 ** (in %_segdir), while dump_doclist(t, term) dumps the logical
 ** doclist for the term across all segments.  The per-segment doclist
 ** can contain deletions, while the full-index doclist will not
 ** (deletions are omitted).
@@ skipping 301 matching lines @@
   sqlite3 *db, 
   char **pzErrMsg,
   const sqlite3_api_routines *pApi
 ){
   SQLITE_EXTENSION_INIT2(pApi)
   return sqlite3Fts2Init(db);
 }
 #endif
 
 #endif /* !defined(SQLITE_CORE) || defined(SQLITE_ENABLE_FTS2) */