| // Copyright (C) 2014 Yasuhiro Matsumoto <mattn.jp@gmail.com>. |
| // |
| // Use of this source code is governed by an MIT-style |
| // license that can be found in the LICENSE file. |
| |
| package sqlite3 |
| |
| /* |
| #include <sqlite3-binding.h> |
| #include <stdlib.h> |
| */ |
| import "C" |
| import ( |
| "runtime" |
| "unsafe" |
| ) |
| |
| type SQLiteBackup struct { |
| b *C.sqlite3_backup |
| } |
| |
| func (c *SQLiteConn) Backup(dest string, conn *SQLiteConn, src string) (*SQLiteBackup, error) { |
| destptr := C.CString(dest) |
| defer C.free(unsafe.Pointer(destptr)) |
| srcptr := C.CString(src) |
| defer C.free(unsafe.Pointer(srcptr)) |
| |
| if b := C.sqlite3_backup_init(c.db, destptr, conn.db, srcptr); b != nil { |
| bb := &SQLiteBackup{b: b} |
| runtime.SetFinalizer(bb, (*SQLiteBackup).Finish) |
| return bb, nil |
| } |
| return nil, c.lastError() |
| } |
| |
| // Backs up for one step. Calls the underlying `sqlite3_backup_step` function. |
| // This function returns a boolean indicating if the backup is done and |
| // an error signalling any other error. Done is returned if the underlying C |
| // function returns SQLITE_DONE (Code 101) |
| func (b *SQLiteBackup) Step(p int) (bool, error) { |
| ret := C.sqlite3_backup_step(b.b, C.int(p)) |
| if ret == C.SQLITE_DONE { |
| return true, nil |
| } else if ret != 0 && ret != C.SQLITE_LOCKED && ret != C.SQLITE_BUSY { |
| return false, Error{Code: ErrNo(ret)} |
| } |
| return false, nil |
| } |
| |
| func (b *SQLiteBackup) Remaining() int { |
| return int(C.sqlite3_backup_remaining(b.b)) |
| } |
| |
| func (b *SQLiteBackup) PageCount() int { |
| return int(C.sqlite3_backup_pagecount(b.b)) |
| } |
| |
| func (b *SQLiteBackup) Finish() error { |
| return b.Close() |
| } |
| |
| func (b *SQLiteBackup) Close() error { |
| ret := C.sqlite3_backup_finish(b.b) |
| if ret != 0 { |
| return Error{Code: ErrNo(ret)} |
| } |
| b.b = nil |
| runtime.SetFinalizer(b, nil) |
| return nil |
| } |