mirror of https://github.com/mattn/go-sqlite3.git
57 lines
1.3 KiB
Go
57 lines
1.3 KiB
Go
package sqlite3
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/*
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#include <sqlite3.h>
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#include <stdlib.h>
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*/
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import "C"
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import (
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"unsafe"
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)
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type Backup struct {
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b *C.sqlite3_backup
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}
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func (c *SQLiteConn) Backup(dest string, conn *SQLiteConn, src string) (*Backup, error) {
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destptr := C.CString(dest)
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defer C.free(unsafe.Pointer(destptr))
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srcptr := C.CString(src)
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defer C.free(unsafe.Pointer(srcptr))
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if b := C.sqlite3_backup_init(c.db, destptr, conn.db, srcptr); b != nil {
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return &Backup{b: b}, nil
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}
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return nil, c.lastError()
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}
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// Backs up for one step. Calls the underlying `sqlite3_backup_step` function.
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// This function returns a boolean indicating if the backup is done and
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// an error signalling any other error. Done is returned if the underlying C
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// function returns SQLITE_DONE (Code 101)
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func (b *Backup) Step(p int) (bool, error) {
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ret := C.sqlite3_backup_step(b.b, C.int(p))
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if ret == 101 {
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return true, nil
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} else if ret != 0 {
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return false, Error{Code: ErrNo(ret)}
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}
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return false, nil
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}
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func (b *Backup) Remaining() int {
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return int(C.sqlite3_backup_remaining(b.b))
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}
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func (b *Backup) PageCount() int {
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return int(C.sqlite3_backup_pagecount(b.b))
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}
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func (b *Backup) Finish() error {
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ret := C.sqlite3_backup_finish(b.b)
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if ret != 0 {
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return Error{Code: ErrNo(ret)}
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}
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return nil
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}
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