#ifndef _PAGER_H_
#define _PAGER_H_
#ifndef SQLITE_DEFAULT_PAGE_SIZE
# define SQLITE_DEFAULT_PAGE_SIZE 1024
#endif
#ifndef SQLITE_MAX_PAGE_SIZE
# define SQLITE_MAX_PAGE_SIZE 32768
#endif
#define SQLITE_MAX_PAGE 1073741823
typedef unsigned int Pgno;
typedef struct Pager Pager;
typedef struct PgHdr DbPage;
#define PAGER_OMIT_JOURNAL 0x0001
#define PAGER_NO_READLOCK 0x0002
#define PAGER_LOCKINGMODE_QUERY -1
#define PAGER_LOCKINGMODE_NORMAL 0
#define PAGER_LOCKINGMODE_EXCLUSIVE 1
int sqlite3PagerOpen(Pager **ppPager, const char *zFilename,
int nExtra, int flags);
void sqlite3PagerSetBusyhandler(Pager*, BusyHandler *pBusyHandler);
void sqlite3PagerSetDestructor(Pager*, void(*)(DbPage*,int));
void sqlite3PagerSetReiniter(Pager*, void(*)(DbPage*,int));
int sqlite3PagerSetPagesize(Pager*, int);
int sqlite3PagerReadFileheader(Pager*, int, unsigned char*);
void sqlite3PagerSetCachesize(Pager*, int);
int sqlite3PagerClose(Pager *pPager);
int sqlite3PagerAcquire(Pager *pPager, Pgno pgno, DbPage **ppPage, int clrFlag);
#define sqlite3PagerGet(A,B,C) sqlite3PagerAcquire(A,B,C,0)
DbPage *sqlite3PagerLookup(Pager *pPager, Pgno pgno);
int sqlite3PagerRef(DbPage*);
int sqlite3PagerUnref(DbPage*);
Pgno sqlite3PagerPagenumber(DbPage*);
int sqlite3PagerWrite(DbPage*);
int sqlite3PagerIswriteable(DbPage*);
int sqlite3PagerOverwrite(Pager *pPager, Pgno pgno, void*);
int sqlite3PagerPagecount(Pager*);
int sqlite3PagerTruncate(Pager*,Pgno);
int sqlite3PagerBegin(DbPage*, int exFlag);
int sqlite3PagerCommitPhaseOne(Pager*,const char *zMaster, Pgno);
int sqlite3PagerCommitPhaseTwo(Pager*);
int sqlite3PagerRollback(Pager*);
int sqlite3PagerIsreadonly(Pager*);
int sqlite3PagerStmtBegin(Pager*);
int sqlite3PagerStmtCommit(Pager*);
int sqlite3PagerStmtRollback(Pager*);
void sqlite3PagerDontRollback(DbPage*);
void sqlite3PagerDontWrite(DbPage*);
int sqlite3PagerRefcount(Pager*);
int *sqlite3PagerStats(Pager*);
void sqlite3PagerSetSafetyLevel(Pager*,int,int);
const char *sqlite3PagerFilename(Pager*);
const char *sqlite3PagerDirname(Pager*);
const char *sqlite3PagerJournalname(Pager*);
int sqlite3PagerNosync(Pager*);
int sqlite3PagerRename(Pager*, const char *zNewName);
void sqlite3PagerSetCodec(Pager*,void*(*)(void*,void*,Pgno,int),void*);
int sqlite3PagerMovepage(Pager*,DbPage*,Pgno);
int sqlite3PagerReset(Pager*);
int sqlite3PagerReleaseMemory(int);
void *sqlite3PagerGetData(DbPage *);
void *sqlite3PagerGetExtra(DbPage *);
int sqlite3PagerLockingMode(Pager *, int);
#if defined(SQLITE_DEBUG) || defined(SQLITE_TEST)
int sqlite3PagerLockstate(Pager*);
#endif
#ifdef SQLITE_TEST
void sqlite3PagerRefdump(Pager*);
int pager3_refinfo_enable;
#endif
#ifdef SQLITE_TEST
void disable_simulated_io_errors(void);
void enable_simulated_io_errors(void);
#else
# define disable_simulated_io_errors()
# define enable_simulated_io_errors()
#endif
#endif