diff options
Diffstat (limited to 'backup.go')
| -rw-r--r-- | backup.go | 27 |
1 files changed, 21 insertions, 6 deletions
@@ -6,7 +6,11 @@ package sqlite3 /* +#ifndef USE_LIBSQLITE3 #include <sqlite3-binding.h> +#else +#include <sqlite3.h> +#endif #include <stdlib.h> */ import "C" @@ -15,10 +19,12 @@ import ( "unsafe" ) +// SQLiteBackup implement interface of Backup. type SQLiteBackup struct { b *C.sqlite3_backup } +// Backup make backup from src to dest. func (c *SQLiteConn) Backup(dest string, conn *SQLiteConn, src string) (*SQLiteBackup, error) { destptr := C.CString(dest) defer C.free(unsafe.Pointer(destptr)) @@ -33,10 +39,10 @@ func (c *SQLiteConn) Backup(dest string, conn *SQLiteConn, src string) (*SQLiteB 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) +// Step to 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 { @@ -47,24 +53,33 @@ func (b *SQLiteBackup) Step(p int) (bool, error) { return false, nil } +// Remaining return whether have the rest for backup. func (b *SQLiteBackup) Remaining() int { return int(C.sqlite3_backup_remaining(b.b)) } +// PageCount return count of pages. func (b *SQLiteBackup) PageCount() int { return int(C.sqlite3_backup_pagecount(b.b)) } +// Finish close backup. func (b *SQLiteBackup) Finish() error { return b.Close() } +// Close close backup. func (b *SQLiteBackup) Close() error { ret := C.sqlite3_backup_finish(b.b) + + // sqlite3_backup_finish() never fails, it just returns the + // error code from previous operations, so clean up before + // checking and returning an error + b.b = nil + runtime.SetFinalizer(b, nil) + if ret != 0 { return Error{Code: ErrNo(ret)} } - b.b = nil - runtime.SetFinalizer(b, nil) return nil } |