SQLite

#define FTS5_BI_ORDER_DESC   0x0080

/*
** Values for Fts5Cursor.csrflags
*/
#define FTS5CSR_REQUIRE_CONTENT   0x01
#define FTS5CSR_REQUIRE_DOCSIZE   0x02
#define FTS5CSR_REQUIRE_INST      0x04
#define FTS5CSR_EOF               0x04
#define FTS5CSR_FREE_ZRANK        0x08
#define FTS5CSR_REQUIRE_RESEEK    0x10
#define FTS5CSR_EOF               0x08
#define FTS5CSR_FREE_ZRANK        0x10
#define FTS5CSR_REQUIRE_RESEEK    0x20

#define BitFlagAllTest(x,y) (((x) & (y))==(y))
#define BitFlagTest(x,y)    (((x) & (y))!=0)

/*
** Constants for the largest and smallest possible 64-bit signed integers.
** These are copied from sqliteInt.h.

/*
** This function is called after the cursor passed as the only argument
** is moved to point at a different row. It clears all cached data 
** specific to the previous row stored by the cursor object.
*/
static void fts5CsrNewrow(Fts5Cursor *pCsr){
  CsrFlagSet(pCsr, FTS5CSR_REQUIRE_CONTENT | FTS5CSR_REQUIRE_DOCSIZE );
  sqlite3_free(pCsr->aInst);
  pCsr->aInst = 0;
  pCsr->nInstCount = 0;
  CsrFlagSet(pCsr, 
      FTS5CSR_REQUIRE_CONTENT 
    | FTS5CSR_REQUIRE_DOCSIZE 
    | FTS5CSR_REQUIRE_INST 
  );
}

/*
** Close the cursor.  For additional information see the documentation
** on the xClose method of the virtual table interface.
*/
static int fts5CloseMethod(sqlite3_vtab_cursor *pCursor){
  if( pCursor ){
    Fts5Table *pTab = (Fts5Table*)(pCursor->pVtab);
    Fts5Cursor *pCsr = (Fts5Cursor*)pCursor;
    Fts5Cursor **pp;
    Fts5Auxdata *pData;
    Fts5Auxdata *pNext;

    fts5CsrNewrow(pCsr);
    sqlite3_free(pCsr->aInst);
    if( pCsr->pStmt ){
      int eStmt = fts5StmtType(pCsr);
      sqlite3Fts5StorageStmtRelease(pTab->pStorage, eStmt, pCsr->pStmt);
    }
    if( pCsr->pSorter ){
      Fts5Sorter *pSorter = pCsr->pSorter;
      sqlite3_finalize(pSorter->pStmt);

/*
** Ensure that the Fts5Cursor.nInstCount and aInst[] variables are populated
** correctly for the current view. Return SQLITE_OK if successful, or an
** SQLite error code otherwise.
*/
static int fts5CacheInstArray(Fts5Cursor *pCsr){
  int rc = SQLITE_OK;
  if( pCsr->aInst==0 ){
  if( CsrFlagTest(pCsr, FTS5CSR_REQUIRE_INST) ){
    Fts5PoslistReader *aIter;     /* One iterator for each phrase */
    int nIter;                    /* Number of iterators/phrases */
    int nByte;
    
    nIter = sqlite3Fts5ExprPhraseCount(pCsr->pExpr);
    nByte = sizeof(Fts5PoslistReader) * nIter;
    aIter = (Fts5PoslistReader*)sqlite3Fts5MallocZero(&rc, nByte);

        aInst = &((int*)buf.p)[3 * (nInst-1)];
        aInst[0] = iBest;
        aInst[1] = FTS5_POS2COLUMN(aIter[iBest].iPos);
        aInst[2] = FTS5_POS2OFFSET(aIter[iBest].iPos);
        sqlite3Fts5PoslistReaderNext(&aIter[iBest]);
      }

      sqlite3_free(pCsr->aInst);
      pCsr->aInst = (int*)buf.p;
      pCsr->nInstCount = nInst;
      sqlite3_free(aIter);
      CsrFlagClear(pCsr, FTS5CSR_REQUIRE_INST);
    }
  }
  return rc;
}

static int fts5ApiInstCount(Fts5Context *pCtx, int *pnInst){
  Fts5Cursor *pCsr = (Fts5Cursor*)pCtx;

    }
  }
}

set dbfile [lindex $argv end-1]
if {$O(delete)} { file delete -force $dbfile }
sqlite3 db $dbfile
catch { load_static_extension db fts5 }
db func loadfile loadfile

db transaction {
  set pref ""
  if {$O(prefix)!=""} { set pref ", prefix='$O(prefix)'" }
  catch {
    db eval "CREATE VIRTUAL TABLE t1 USING $O(vtab) (path, content$O(tok)$pref)"

  puts -nonewline $G(fd) $G(hdr)
}

proc fts5c_printfile {zIn} {
  global G
  set data [readfile $zIn]
  set zTail [file tail $zIn]
  puts $G(fd) "#line 1 \"$zTail\""
  puts $G(fd) "#line 2 \"$zTail\""

  set sub_map [list --FTS5-SOURCE-ID-- [fts5_source_id $::srcdir]]
  if {$zTail=="fts5parse.c"} {
    lappend sub_map yy fts5yy YY fts5YY TOKEN FTS5TOKEN
  }

  foreach line [split $data "\n"] {

if {[llength $argv]!=2} usage

set database [lindex $argv 0]
set tbl [lindex $argv 1]

sqlite3 db $database
catch { load_static_extension db fts5 }

db eval "SELECT fts5_decode(rowid, block) AS d FROM ${tbl}_data WHERE id=10" {
  foreach lvl [lrange $d 1 end] {
    puts $lvl
  }
}