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History

Lasse R.H. Nielsen 4f8333e80e Add more `interface` and `final` modifiers to `dart:core`. Make intent explicit for classes which are intended as interfaces, or which are not intended to be subclassed. Mainly classes which are pure interfaces are marked as such, and platform-specific classes not intended for subclassing are made `final`. The `final` classes includes `BigInt`, which is written to assume that arguments inherit its private members (it runs `_ensureSystemBigInt` on arguments). It also includes the `Expando`, `WeakReference` and `Finalizer` classes, which are just intended as stand-alone implementation classes for accessing platform-specific functionality. Change-Id: Ib770c265edff127a289a67fe72d15b9ff0499407 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/287180 Reviewed-by: Stephen Adams <sra@google.com> Commit-Queue: Lasse Nielsen <lrn@google.com> Reviewed-by: Aske Simon Christensen <askesc@google.com> Reviewed-by: Nate Bosch <nbosch@google.com> Reviewed-by: Martin Kustermann <kustermann@google.com>		2023-03-09 12:31:08 +00:00
..
docs	[samples/ffi] Update sqlite-tutorial	2023-02-21 21:23:43 +00:00
example	[vm/ffi] Migrate `package:ffi` `Utf8` and `Utf16` uses	2021-02-11 13:13:32 +00:00
lib	Add more `interface` and `final` modifiers to `dart:core`.	2023-03-09 12:31:08 +00:00
test	[tests] Avoid small --optimization-counter-threshold in tests	2022-10-10 21:04:18 +00:00
.gitignore	Revert "[samples/ffi] Generate sqlite3 bindings with package:ffigen"	2020-08-11 19:38:18 +00:00
pubspec.yaml	[samples/ffi] Update sqlite sample	2022-06-07 12:11:39 +00:00
README.md	[samples/ffi] Update sqlite sample	2022-06-07 12:11:39 +00:00

README.md

Sample code dart:ffi

This is an illustrative sample for how to use dart:ffi.

Prerequirement

For Windows, Linux, and MacOS, you should make sure, sqlite dev lib installed on your system.

Windows user can download dll from https://www.sqlite.org/download.html

If you do not have any sqlite3.dll or so file, you may found error message:

Unhandled exception:
Invalid argument(s): Failed to load dynamic library (126)
#0      _open (dart:ffi-patch/ffi_dynamic_library_patch.dart:13:55)
#1      new DynamicLibrary.open (dart:ffi-patch/ffi_dynamic_library_patch.dart:22:12)

Building and Running this Sample

Building and running this sample is done through pub. Running dart run example/main should produce the following output.

$ dart run example/main
1 Chocolade chip cookie Chocolade cookie foo
2 Ginger cookie null 42
3 Cinnamon roll null null
1 Chocolade chip cookie Chocolade cookie foo
2 Ginger cookie null 42
expected exception on accessing result data after close: The result has already been closed.
expected this query to fail: no such column: non_existing_column (Code 1: SQL logic error)

Tutorial

A tutorial walking through the code is available in docs/sqlite-tutorial.md. For information on how to use this package within a Flutter app, see docs/android.md. (Note: iOS is not yet supported).