1772 typedef struct sqlite3_vfs sqlite3_vfs;  typedef
1774 struct sqlite3_vfs {  struct
1778   sqlite3_vfs *pNext;      /* Next registered VFS */  argument
1781   int (*xOpen)(sqlite3_vfs*, sqlite3_filename zName, sqlite3_file*,  argument
1783   int (*xDelete)(sqlite3_vfs*, const char *zName, int syncDir);  argument
1784   int (*xAccess)(sqlite3_vfs*, const char *zName, int flags, int *pResOut);  argument
1785   int (*xFullPathname)(sqlite3_vfs*, const char *zName, int nOut, char *zOut);  argument
1786   void *(*xDlOpen)(sqlite3_vfs*, const char *zFilename);  argument
1787   void (*xDlError)(sqlite3_vfs*, int nByte, char *zErrMsg);  argument
1788   void (*(*xDlSym)(sqlite3_vfs*,void*, const char *zSymbol))(void);  argument
1789   void (*xDlClose)(sqlite3_vfs*, void*);  argument
1790   int (*xRandomness)(sqlite3_vfs*, int nByte, char *zOut);  argument
1791   int (*xSleep)(sqlite3_vfs*, int microseconds);  argument
1792   int (*xCurrentTime)(sqlite3_vfs*, double*);  argument
1793   int (*xGetLastError)(sqlite3_vfs*, int, char *);  argument
1798   int (*xCurrentTimeInt64)(sqlite3_vfs*, sqlite3_int64*);  argument
1803   int (*xSetSystemCall)(sqlite3_vfs*, const char *zName, sqlite3_syscall_ptr);  argument
1804   sqlite3_syscall_ptr (*xGetSystemCall)(sqlite3_vfs*, const char *zName);  argument
1805   const char *(*xNextSystemCall)(sqlite3_vfs*, const char *zName);  argument