forked from mirror/go-sqlite3
41 lines
1.1 KiB
Go
41 lines
1.1 KiB
Go
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// Copyright (C) 2018 The Go-SQLite3 Authors.
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//
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// Use of this source code is governed by an MIT-style
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// license that can be found in the LICENSE file.
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// +build cgo
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// +build !libsqlite3
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// +build sqlite_preupdate_hook
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package sqlite3
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/*
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#cgo CFLAGS: -DSQLITE_ENABLE_PREUPDATE_HOOK
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#cgo LDFLAGS: -lm
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#include <sqlite3-binding.h>
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#include <stdlib.h>
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void preUpdateHookTrampoline(void*, sqlite3 *, int, char *, char *, sqlite3_int64, sqlite3_int64);
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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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// RegisterPreUpdateHook sets the pre-update hook for a connection.
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//
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// The callback is passed a SQLitePreUpdateData struct with the data for
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// the update, as well as methods for fetching copies of impacted data.
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//
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// If there is an existing update hook for this connection, it will be
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// removed. If callback is nil the existing hook (if any) will be removed
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// without creating a new one.
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func (c *SQLiteConn) RegisterPreUpdateHook(callback func(SQLitePreUpdateData)) {
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if callback == nil {
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C.sqlite3_preupdate_hook(c.db, nil, nil)
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} else {
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C.sqlite3_preupdate_hook(c.db, (*[0]byte)(unsafe.Pointer(C.preUpdateHookTrampoline)), unsafe.Pointer(newHandle(c, callback)))
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}
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}
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