Fossil

  } aHook[5];
  char *azDeleteOnFail[3];  /* Files to delete on a failure */
  char *azBeforeCommit[5];  /* Commands to run prior to COMMIT */
  int nBeforeCommit;        /* Number of entries in azBeforeCommit */
  int nPriorChanges;        /* sqlite3_total_changes() at transaction start */
  const char *zStartFile;   /* File in which transaction was started */
  int iStartLine;           /* Line of zStartFile where transaction started */
  int (*xAuth)(void*,int,const char*,const char*,const char*,const char*);
  void *pAuthArg;           /* Argument to the authorizer */
  const char *zAuthName;    /* Name of the authorizer */
} db = {0, 0, 0, 0, 0, 0, };

/*
** Arrange for the given file to be deleted on a failure.
*/
void db_delete_on_failure(const char *zFilename){
  assert( db.nDeleteOnFail<count(db.azDeleteOnFail) );

      db.aHook[i].xHook = xS;
    }
  }
  db.aHook[db.nCommitHook].sequence = sequence;
  db.aHook[db.nCommitHook].xHook = x;
  db.nCommitHook++;
}

/*
** Set or unset the query authorizer callback function
*/
void db_set_authorizer(
  int(*xAuth)(void*,int,const char*,const char*,const char*,const char*),
  void *pArg,
  const char *zName /* for tracing */
){
  if( db.xAuth ){
    fossil_panic("multiple active db_set_authorizer() calls");
  }
  if( g.db ) sqlite3_set_authorizer(g.db, xAuth, pArg);
  db.xAuth = xAuth;
  db.pAuthArg = pArg;
  db.zAuthName = zName;
  if( g.fSqlTrace ) fossil_trace("-- set authorizer %s\n", zName);
}
void db_clear_authorizer(void){
  if( db.zAuthName && g.fSqlTrace ){
    fossil_trace("-- discontinue authorizer %s\n", db.zAuthName);
  }
  if( g.db ) sqlite3_set_authorizer(g.db, 0, 0);
  db.xAuth = 0;
  db.pAuthArg = 0;
}

#if INTERFACE
/*
** Possible flags to db_vprepare
*/
#define DB_PREPARE_IGNORE_ERROR  0x001  /* Suppress errors */
#define DB_PREPARE_PERSISTENT    0x002  /* Stmt will stick around for a while */

** database.
*/
void db_init_database(
  const char *zFileName,   /* Name of database file to create */
  const char *zSchema,     /* First part of schema */
  ...                      /* Additional SQL to run.  Terminate with NULL. */
){
  sqlite3 *xdb;
  int rc;
  const char *zSql;
  va_list ap;

  xdb = db_open(zFileName ? zFileName : ":memory:");
  sqlite3_exec(xdb, "BEGIN EXCLUSIVE", 0, 0, 0);
  if( db.xAuth ){
    sqlite3_set_authorizer(xdb, db.xAuth, db.pAuthArg);
  }
  rc = sqlite3_exec(xdb, zSchema, 0, 0, 0);
  if( rc!=SQLITE_OK ){
    db_err("%s", sqlite3_errmsg(xdb));
  }
  va_start(ap, zSchema);
  while( (zSql = va_arg(ap, const char*))!=0 ){
    rc = sqlite3_exec(xdb, zSql, 0, 0, 0);
    if( rc!=SQLITE_OK ){
      db_err("%s", sqlite3_errmsg(xdb));
    }
  }
  va_end(ap);
  sqlite3_exec(xdb, "COMMIT", 0, 0, 0);
  if( zFileName || g.db!=0 ){
    sqlite3_close(xdb);
  }else{
    g.db = xdb;
  }
}

/*
** Function to return the number of seconds since 1970.  This is
** the same as strftime('%s','now') but is more compact.
*/

**
** Check for unfinalized statements and report errors if the reportErrors
** argument is true.  Ignore unfinalized statements when false.
*/
void db_close(int reportErrors){
  sqlite3_stmt *pStmt;
  if( g.db==0 ) return;
  sqlite3_set_authorizer(g.db, 0, 0);
  if( g.fSqlStats ){
    int cur, hiwtr;
    sqlite3_db_status(g.db, SQLITE_DBSTATUS_LOOKASIDE_USED, &cur, &hiwtr, 0);
    fprintf(stderr, "-- LOOKASIDE_USED         %10d %10d\n", cur, hiwtr);
    sqlite3_db_status(g.db, SQLITE_DBSTATUS_LOOKASIDE_HIT, &cur, &hiwtr, 0);
    fprintf(stderr, "-- LOOKASIDE_HIT                     %10d\n", hiwtr);
    sqlite3_db_status(g.db, SQLITE_DBSTATUS_LOOKASIDE_MISS_SIZE, &cur,&hiwtr,0);

    sqlite3_status(SQLITE_STATUS_PAGECACHE_OVERFLOW, &cur, &hiwtr, 0);
    fprintf(stderr, "-- PCACHE_OVFLOW          %10d %10d\n", cur, hiwtr);
    fprintf(stderr, "-- prepared statements    %10d\n", db.nPrepare);
  }
  while( db.pAllStmt ){
    db_finalize(db.pAllStmt);
  }
  if( db.nBegin ){
    if( reportErrors ){
      fossil_warning("Transaction started at %s:%d never commits",
                     db.zStartFile, db.iStartLine);
    }
    db_end_transaction(1);
  }
  pStmt = 0;
  sqlite3_busy_timeout(g.db, 0);
  g.dbIgnoreErrors++; /* Stop "database locked" warnings */
  sqlite3_exec(g.db, "PRAGMA optimize", 0, 0, 0);
  g.dbIgnoreErrors--;
  db_close_config();

  /* If the localdb has a lot of unused free space,
  ** then VACUUM it as we shut down.
  */

*/
void db_panic_close(void){
  if( g.db ){
    int rc;
    sqlite3_wal_checkpoint(g.db, 0);
    rc = sqlite3_close(g.db);
    if( g.fSqlTrace ) fossil_trace("-- sqlite3_close(%d)\n", rc);
    db_clear_authorizer();
  }
  g.db = 0;
  g.repositoryOpen = 0;
  g.localOpen = 0;
}

/*