int sqlite4BtCsrData(bt_cursor *pCsr, int, int, const void **ppV, int *pnV);

int sqlite4BtReplace(bt_db*, const void *pK, int nK, const void *pV, int nV);
int sqlite4BtDelete(bt_cursor*);

int sqlite4BtSetCookie(bt_db*, unsigned int iVal);
int sqlite4BtGetCookie(bt_db*, unsigned int *piVal);

int sqlite4BtCsrData(bt_cursor *pCsr, int, int, const void **ppV, int *pnV);

int sqlite4BtReplace(bt_db*, const void *pK, int nK, const void *pV, int nV);
int sqlite4BtDelete(bt_cursor*);

int sqlite4BtSetCookie(bt_db*, unsigned int iVal);
int sqlite4BtGetCookie(bt_db*, unsigned int *piVal);

/*
** Append a human readable representation of the b-tree page passed via
** arguments a+n to the buffer passed as the first argument. If argument
** pgno is non-zero it is included in the output.
*/
int sqlite4BtDebugPage(sqlite4_buffer*, unsigned int pgno, char *a, int n);

/*
** kvstore xControl() method.
**
** BT_CONTROL_INFO:
**   If the second argument to sqlite4BtControl() is BT_CONTROL_INFO, then
**   the third is expected to be a pointer to an instance of type bt_info.
**   The "output" buffer must already be initialized. Before 
**   sqlite4BtControl() returns it appends debugging information to the
**   buffer. The specific information appended depends on the eType and
**   pgno member variables.
*/
int sqlite4BtControl(bt_db*, int op, void *pArg);

#define BT_CONTROL_INFO 7706389
typedef struct bt_info bt_info;
struct bt_info {
  int eType;
  unsigned int pgno;
  sqlite4_buffer output;
};

#ifndef MIN
# define MIN(a,b) (((a)<(b))?(a):(b))
#endif
#ifndef MAX
# define MAX(a,b) (((a)>(b))?(a):(b))
#endif

/* #define BT_STDERR_DEBUG 1 */

struct bt_db {
  sqlite4_env *pEnv;              /* SQLite environment */
  BtPager *pPager;                /* Underlying page-based database */
  bt_cursor *pAllCsr;             /* List of all open cursors */
};

................................................................................

  return pgno;
}

/*
**************************************************************************/

#ifndef NDEBUG
#include <stdio.h>














static void printPage(FILE *f, u32 pgno, u8 *aData, int nData){
  int i;
  int nCell = (int)btCellCount(aData, nData);

  fprintf(f, "Page %d: ", pgno);
  fprintf(f, "nCell=%d ", nCell);
  fprintf(f, "iFree=%d ", (int)btFreeOffset(aData, nData));
  fprintf(f, "flags=%d ", (int)btFlags(aData));
  if( btFlags(aData) & BT_PGFLAGS_INTERNAL ){
    fprintf(f, "rchild=%d ", (int)btGetU32(&aData[1]));
  }
  fprintf(f, "cell-offsets=(");
  for(i=0; i<nCell; i++){
    u8 *ptr = btCellPtrFind(aData, nData, i);
    fprintf(f, "%s%d", i==0?"":" ", (int)btGetU16(ptr));
  }
  fprintf(f, ")\n");

  for(i=0; i<nCell; i++){
    int nKey;
    int j;
    u8 *pCell = btCellFind(aData, nData, i);
    fprintf(f, "  Key %d: ", i);
    pCell += sqlite4BtVarintGet32(pCell, &nKey);
    for(j=0; j<nKey; j++){
      fprintf(f, "%02X", (int)pCell[j]);
    }
    if( btFlags(aData) & BT_PGFLAGS_INTERNAL ){
      fprintf(f, "  child=%d ", (int)btGetU32(&pCell[j]));
    }



















    fprintf(f, "\n");

  }
}
int printPgdataToStderr(u32 pgno, u8 *aData, int nData){
  printPage(stderr, pgno, aData, nData);
  return 0;
}

int printPgToStderr(BtPage *pPg){
  printPage(stderr, sqlite4BtPagePgno(pPg), sqlite4BtPageData(pPg), 1024);
................................................................................
  const int pgsz = sqlite4BtPagerPagesize(pPager);
  u8 *aData;
  u8 *pCell;
  u8 *pOvfl = 0;
  int iCell = pCsr->aiCell[pCsr->nPg-1];
  int n;
  int rc = SQLITE4_OK;
  int e = 0;
  
  aData = (u8*)sqlite4BtPageData(pCsr->apPage[pCsr->nPg-1]);
  assert( btCellCount(aData, pgsz)>iCell );
  pCell = btCellFind(aData, pgsz, iCell);
  pCell += sqlite4BtVarintGet32(pCell, &n);

  if( n==0 ){
................................................................................
int sqlite4BtSetCookie(bt_db *db, unsigned int iVal){
  return sqlite4BtPagerSetCookie(db->pPager, iVal);
}

int sqlite4BtGetCookie(bt_db *db, unsigned int *piVal){
  return sqlite4BtPagerGetCookie(db->pPager, piVal);
}

#ifndef MIN
# define MIN(a,b) (((a)<(b))?(a):(b))
#endif
#ifndef MAX
# define MAX(a,b) (((a)>(b))?(a):(b))
#endif

#define BT_STDERR_DEBUG 1

struct bt_db {
  sqlite4_env *pEnv;              /* SQLite environment */
  BtPager *pPager;                /* Underlying page-based database */
  bt_cursor *pAllCsr;             /* List of all open cursors */
};

................................................................................

  return pgno;
}

/*
**************************************************************************/

static void btBufPrintf(sqlite4_buffer *pBuf, const char *zFormat, ...){
  char *zAppend;
  va_list ap;

  va_start(ap, zFormat);
  zAppend = sqlite4_vmprintf(0, zFormat, ap);
  va_end(ap);

  sqlite4_buffer_append(pBuf, zAppend, strlen(zAppend));
  sqlite4_free(0, zAppend);
}

/*
** Append a human-readable interpretation of the b-tree page in aData/nData
** to buffer pBuf.
*/
static void btPageToAscii(u32 pgno, u8 *aData, int nData, sqlite4_buffer *pBuf){
  int i;
  int nCell = (int)btCellCount(aData, nData);

  btBufPrintf(pBuf, "Page %d: ", pgno);
  btBufPrintf(pBuf, "nCell=%d ", nCell);
  btBufPrintf(pBuf, "iFree=%d ", (int)btFreeOffset(aData, nData));
  btBufPrintf(pBuf, "flags=%d ", (int)btFlags(aData));
  if( btFlags(aData) & BT_PGFLAGS_INTERNAL ){
    btBufPrintf(pBuf, "rchild=%d ", (int)btGetU32(&aData[1]));
  }
  btBufPrintf(pBuf, "cell-offsets=(");
  for(i=0; i<nCell; i++){
    u8 *ptr = btCellPtrFind(aData, nData, i);
    btBufPrintf(pBuf, "%s%d", i==0?"":" ", (int)btGetU16(ptr));
  }
  btBufPrintf(pBuf, ")\n");

  for(i=0; i<nCell; i++){
    int nKey;
    int j;
    u8 *pCell = btCellFind(aData, nData, i);
    btBufPrintf(pBuf, "  Key %d: ", i);
    pCell += sqlite4BtVarintGet32(pCell, &nKey);
    for(j=0; j<nKey; j++){
      btBufPrintf(pBuf, "%02X", (int)pCell[j]);
    }
    if( btFlags(aData) & BT_PGFLAGS_INTERNAL ){
      btBufPrintf(pBuf, "  child=%d ", (int)btGetU32(&pCell[j]));
    }
    btBufPrintf(pBuf, "\n");
  }
}

int sqlite4BtDebugPage(sqlite4_buffer *pBuf, u32 pgno, char *aData, int nData){
  btPageToAscii(pgno, (u8*)aData, nData, pBuf);
  return SQLITE4_OK;
}

#ifndef NDEBUG
#include <stdio.h>

static void printPage(FILE *f, u32 pgno, u8 *aData, int nData){
  sqlite4_buffer buf;

  sqlite4_buffer_init(&buf, 0);
  btPageToAscii(pgno, aData, nData, &buf);
  sqlite4_buffer_append(&buf, "", 1);

  fprintf(f, "%s", (char*)buf.p);
  sqlite4_buffer_clear(&buf);
}

int printPgdataToStderr(u32 pgno, u8 *aData, int nData){
  printPage(stderr, pgno, aData, nData);
  return 0;
}

int printPgToStderr(BtPage *pPg){
  printPage(stderr, sqlite4BtPagePgno(pPg), sqlite4BtPageData(pPg), 1024);
................................................................................
  const int pgsz = sqlite4BtPagerPagesize(pPager);
  u8 *aData;
  u8 *pCell;
  u8 *pOvfl = 0;
  int iCell = pCsr->aiCell[pCsr->nPg-1];
  int n;
  int rc = SQLITE4_OK;

  
  aData = (u8*)sqlite4BtPageData(pCsr->apPage[pCsr->nPg-1]);
  assert( btCellCount(aData, pgsz)>iCell );
  pCell = btCellFind(aData, pgsz, iCell);
  pCell += sqlite4BtVarintGet32(pCell, &n);

  if( n==0 ){
................................................................................
int sqlite4BtSetCookie(bt_db *db, unsigned int iVal){
  return sqlite4BtPagerSetCookie(db->pPager, iVal);
}

int sqlite4BtGetCookie(bt_db *db, unsigned int *piVal){
  return sqlite4BtPagerGetCookie(db->pPager, piVal);
}

int sqlite4BtControl(bt_db *db, int op, void *pArg){
  int rc = SQLITE4_OK;
  switch( op ){
    case BT_CONTROL_INFO: {
      bt_info *pInfo = (bt_info*)pArg;
      int iTrans = sqlite4BtTransactionLevel(db);
      if( iTrans==0 ) rc = sqlite4BtBegin(db, 1);
      if( rc==SQLITE4_OK ){
        BtPage *pPg = 0;
        rc = sqlite4BtPageGet(db->pPager, pInfo->pgno, &pPg);
        if( rc==SQLITE4_OK ){
          u8 *aData;
          int nData;
          aData = sqlite4BtPageData(pPg);
          nData = sqlite4BtPagerPagesize(db->pPager);
          btPageToAscii(pInfo->pgno, aData, nData, &pInfo->output);
          sqlite4_buffer_append(&pInfo->output, "", 1);
          sqlite4BtPageRelease(pPg);
        }
        if( iTrans==0 ) rc = sqlite4BtCommit(db, 0);
      }
    }
  }

  return rc;
}

*/
static int btClose(KVStore *pKVStore){
  KVBt *p = (KVBt *)pKVStore;
  return sqlite4BtClose(p->pDb);
}

static int btControl(KVStore *pKVStore, int op, void *pArg){
  return SQLITE4_OK;

}

static int btGetMeta(KVStore *pKVStore, unsigned int *piVal){
  KVBt *p = (KVBt *)pKVStore;
  return sqlite4BtGetCookie(p->pDb, piVal);
}

*/
static int btClose(KVStore *pKVStore){
  KVBt *p = (KVBt *)pKVStore;
  return sqlite4BtClose(p->pDb);
}

static int btControl(KVStore *pKVStore, int op, void *pArg){
  KVBt *p = (KVBt *)pKVStore;
  return sqlite4BtControl(p->pDb, op, pArg);
}

static int btGetMeta(KVStore *pKVStore, unsigned int *piVal){
  KVBt *p = (KVBt *)pKVStore;
  return sqlite4BtGetCookie(p->pDb, piVal);
}

**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This file contains code used to implement the PRAGMA command.
*/
#include "sqliteInt.h"


/*
** Interpret the given string as a boolean value.
*/
u8 sqlite4GetBoolean(const char *z){
                             /* 123456789 12345 */
  static const char zText[] = "onoffalseyestrue";
................................................................................
    sqlite4VdbeAddOp4(v, OP_HaltIfNull, SQLITE4_CONSTRAINT, OE_Abort,
                         r2, "value may not be null", P4_STATIC);
    sqlite4VdbeAddOp1(v, OP_ToBlob, r2);
    sqlite4VdbeAddOp0(v, OP_OpenWrite);
    sqlite4VdbeAddOp3(v, OP_Insert, 0, r2, r1);
    sqlite4VdbeAddOp0(v, OP_Halt);
  }else
#endif /* SQLITE4_DEBUG

  /*
  **   PRAGMA integrity_check
  **
  ** Check that for each table, the content of any auxilliary indexes are 
  ** consistent with the primary key index.
  */
................................................................................
      sqlite4VdbeChangeP1(v, addr, iDb);
      sqlite4VdbeChangeP1(v, addr+1, iDb);
      sqlite4VdbeSetNumCols(v, 1);
      sqlite4VdbeSetColName(v, 0, COLNAME_NAME, zPragma, SQLITE4_TRANSIENT);
    }
  }else






















 
  {/* Empty ELSE clause */}



 pragma_out:
  sqlite4DbFree(db, zPragma);
  /* sqlite4DbFree(db, zRight); */
  sqlite4ExprListDelete(db, pList);
}

#endif /* SQLITE4_OMIT_PRAGMA */

**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This file contains code used to implement the PRAGMA command.
*/
#include "sqliteInt.h"
#include "bt.h"

/*
** Interpret the given string as a boolean value.
*/
u8 sqlite4GetBoolean(const char *z){
                             /* 123456789 12345 */
  static const char zText[] = "onoffalseyestrue";
................................................................................
    sqlite4VdbeAddOp4(v, OP_HaltIfNull, SQLITE4_CONSTRAINT, OE_Abort,
                         r2, "value may not be null", P4_STATIC);
    sqlite4VdbeAddOp1(v, OP_ToBlob, r2);
    sqlite4VdbeAddOp0(v, OP_OpenWrite);
    sqlite4VdbeAddOp3(v, OP_Insert, 0, r2, r1);
    sqlite4VdbeAddOp0(v, OP_Halt);
  }else
#endif /* SQLITE4_DEBUG */

  /*
  **   PRAGMA integrity_check
  **
  ** Check that for each table, the content of any auxilliary indexes are 
  ** consistent with the primary key index.
  */
................................................................................
      sqlite4VdbeChangeP1(v, addr, iDb);
      sqlite4VdbeChangeP1(v, addr+1, iDb);
      sqlite4VdbeSetNumCols(v, 1);
      sqlite4VdbeSetColName(v, 0, COLNAME_NAME, zPragma, SQLITE4_TRANSIENT);
    }
  }else

  /*
  ** TODO: This is temporary. There should be some generic way to
  ** pass PRAGMA commands through to KV stores.
  */
  if( sqlite4_stricmp(zPragma, "bt_page_dump")==0 && zRight ){
    bt_info info;
    memset(&info, 0, sizeof(info));
    info.pgno = sqlite4Atoi(zRight);
    sqlite4_buffer_init(&info.output, sqlite4_db_env(db)->pMM);

    rc = sqlite4_kvstore_control(db, zDb, BT_CONTROL_INFO, (void*)&info);
    if( rc==SQLITE4_OK ){
      sqlite4VdbeSetNumCols(v, 1);
      sqlite4VdbeSetColName(v, 0, COLNAME_NAME, "info", SQLITE4_STATIC);
      sqlite4VdbeAddOp2(v, OP_String8, 0, 1);
      sqlite4VdbeChangeP4(v, -1, (char*)info.output.p, P4_TRANSIENT);
      sqlite4VdbeAddOp2(v, OP_ResultRow, 1, 1);
    }
    sqlite4_buffer_clear(&info.output);
  }else

 
  {/* Empty ELSE clause */}



 pragma_out:
  sqlite4DbFree(db, zPragma);
  /* sqlite4DbFree(db, zRight); */
  sqlite4ExprListDelete(db, pList);
}

#endif /* SQLITE4_OMIT_PRAGMA */