SQLite

  int iCol, 
  const char **pz, 
  int *pn
){
  Fts5Cursor *pCsr = (Fts5Cursor*)pCtx;
  int rc = fts5SeekCursor(pCsr);
  if( rc==SQLITE_OK ){
    *pz = (const char*)sqlite3_column_text(pCsr->pStmt, iCol+1);
    *pn = sqlite3_column_bytes(pCsr->pStmt, iCol+1);
  }
  return rc;
}

static int fts5ApiColumnSize(Fts5Context *pCtx, int iCol, int *pnToken){
  Fts5Cursor *pCsr = (Fts5Cursor*)pCtx;
  Fts5Table *pTab = (Fts5Table*)(pCsr->base.pVtab);

**
** xColumnCount:
**   Returns the number of columns in the FTS5 table.
**
** xColumnSize:
**   Reports the size in tokens of a column value from the current row.
**
** xColumnText:
**   Reports the size in tokens of a column value from the current row.
**
** xPhraseCount:
**   Returns the number of phrases in the current query expression.
**
** xPhraseSize:
**   Returns the number of tokens in phrase iPhrase of the query. Phrases
**   are numbered starting from zero.
**

void sqlite3Fts5BufferAppendVarint(int*, Fts5Buffer*, i64);
void sqlite3Fts5BufferAppendBlob(int*, Fts5Buffer*, int, const u8*);
void sqlite3Fts5BufferAppendString(int *, Fts5Buffer*, const char*);
void sqlite3Fts5BufferFree(Fts5Buffer*);
void sqlite3Fts5BufferZero(Fts5Buffer*);
void sqlite3Fts5BufferSet(int*, Fts5Buffer*, int, const u8*);
void sqlite3Fts5BufferAppendPrintf(int *, Fts5Buffer*, char *zFmt, ...);
void sqlite3Fts5BufferAppendListElem(int*, Fts5Buffer*, const char*, int);

#define fts5BufferZero(x)             sqlite3Fts5BufferZero(x)
#define fts5BufferGrow(a,b,c)         sqlite3Fts5BufferGrow(a,b,c)
#define fts5BufferAppendVarint(a,b,c) sqlite3Fts5BufferAppendVarint(a,b,c)
#define fts5BufferFree(a)             sqlite3Fts5BufferFree(a)
#define fts5BufferAppendBlob(a,b,c,d) sqlite3Fts5BufferAppendBlob(a,b,c,d)
#define fts5BufferSet(a,b,c,d)        sqlite3Fts5BufferSet(a,b,c,d)

    for(i=0; rc==SQLITE_OK && i<nCol; i++){
      int colsz = 0;
      rc = pApi->xColumnSize(pFts, i, &colsz);
      sqlite3Fts5BufferAppendPrintf(&rc, &s, "%s%d", i==0?"":" ", colsz);
    }
    if( zReq==0 && nCol>1 ) sqlite3Fts5BufferAppendPrintf(&rc, &s, "}");
  }

  if( zReq==0 ){
    sqlite3Fts5BufferAppendPrintf(&rc, &s, "columntext ");
  }
  if( 0==zReq || 0==sqlite3_stricmp(zReq, "columntext") ){
    for(i=0; rc==SQLITE_OK && i<nCol; i++){
      const char *z;
      int n;
      rc = pApi->xColumnText(pFts, i, &z, &n);
      if( i!=0 ) sqlite3Fts5BufferAppendPrintf(&rc, &s, " ");
      sqlite3Fts5BufferAppendListElem(&rc, &s, z, n);
    }
  }

  if( zReq==0 ){
    sqlite3Fts5BufferAppendPrintf(&rc, &s, " phrasecount ");
  }
  nPhrase = pApi->xPhraseCount(pFts);
  if( 0==zReq || 0==sqlite3_stricmp(zReq, "phrasecount") ){
    sqlite3Fts5BufferAppendPrintf(&rc, &s, "%d", nPhrase);

    *piOff = 0;
    i += getVarint32(&a[i], iVal);
  }
  *piOff += (iVal-2);
  *pi = i;
  return 0;
}

void sqlite3Fts5BufferAppendListElem(
  int *pRc,                       /* IN/OUT: Error code */
  Fts5Buffer *pBuf,               /* Buffer to append to */
  const char *z, int n            /* Value to append to buffer */
){
  int bParen = (n==0);
  int nMax = n*2 + 2 + 1;
  u8 *pOut;
  int i;

  /* Ensure the buffer has space for the new list element */
  if( sqlite3Fts5BufferGrow(pRc, pBuf, nMax) ) return;
  pOut = &pBuf->p[pBuf->n];

  /* Figure out if we need the enclosing {} */
  for(i=0; i<n && bParen==0; i++){
    if( z[i]=='"' || z[i]==' ' ){
      bParen = 1;
    }
  }

  if( bParen ) *pOut++ = '{';
  for(i=0; i<n; i++){
    *pOut++ = z[i];
  }
  if( bParen ) *pOut++ = '}';

  pBuf->n = pOut - pBuf->p;
  *pOut = '\0';
}

  SELECT rowid, fts5_test(t5, 'columnsize') FROM t5 WHERE t5 MATCH 'a'
  ORDER BY rowid DESC;
} {
  3 {1 0}
  2 {0 1}
  1 {4 6}
}

do_execsql_test 5.2 {
  SELECT rowid, fts5_test(t5, 'columntext') FROM t5 WHERE t5 MATCH 'a'
  ORDER BY rowid DESC;
} {
  3 {a {}}
  2 {{} a}
  1 {{a b c d} {e f g h i j}}
}


finish_test