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dart-sdk/samples/ffi/sqlite
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Daco Harkes 92e5746494 Reland "[vm/ffi] Add class modifiers" 
This is a reland of commit 1755f89092

Can land after (or with) the Flutter PR:
https://github.com/flutter/engine/pull/40434

Original change's description:
> [vm/ffi] Add class modifiers
>
> Adds class modifiers to `dart:ffi`.
>
> Migrates all user-defined subclasses of `Struct`, `Union`, `Opaque`,
> and `AbiSpecificInteger` to be `final class`es.
>
> Does not remove the manual error checking, so some errors will show up
> twice now in language version 3.0. In language version <3.0, only the
> FFI-specific error will show up.
>
> In a follow-up CL, we will try to make the language-errors to show up
> also <3.0 so that we can remove the FFI-specific errors.
>
> Examples of duplicated errors:
> pkg/analyzer/test/src/diagnostics/subtype_of_ffi_class_test.dart
>
> TEST=pkg/analyzer/test/ (for the analyzer)
> TEST=pkg/front_end/testcases/ (for the CFE)
> TEST=test/ffi/ (for the VM)
>
> CoreLibraryReviewExempt: No need for dart2js to review.
> Bug: https://github.com/dart-lang/sdk/issues/51683
> Change-Id: I2964ceccb7db59fbdaf6be5319f5e4ec2dabe0f3
> Cq-Include-Trybots: luci.dart.try:pkg-linux-debug-try,pkg-win-release-try,pkg-mac-release-try,vm-precomp-ffi-qemu-linux-release-riscv64-try,vm-precomp-ffi-qemu-linux-release-arm-try,vm-ffi-android-debug-arm64c-try,vm-ffi-android-debug-arm-try,vm-reload-rollback-linux-debug-x64-try,analyzer-analysis-server-linux-try,analyzer-linux-release-try
> Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/289223
> Reviewed-by: Johnni Winther <johnniwinther@google.com>
> Reviewed-by: Devon Carew <devoncarew@google.com>
> Reviewed-by: Brian Wilkerson <brianwilkerson@google.com>
> Reviewed-by: Jackson Gardner <jacksongardner@google.com>
> Reviewed-by: Lasse Nielsen <lrn@google.com>
> Commit-Queue: Daco Harkes <dacoharkes@google.com>

TEST=pkg/analyzer/test/ (for the analyzer)
TEST=pkg/front_end/testcases/ (for the CFE)
TEST=test/ffi/ (for the VM)
CoreLibraryReviewExempt: No need for dart2js to review.
Bug: https://github.com/dart-lang/sdk/issues/51683
Change-Id: I2ee3f0ac31d4162068a2346a06320029b2263ee2
Cq-Include-Trybots: luci.dart.try:pkg-linux-debug-try,pkg-win-release-try,pkg-mac-release-try,vm-precomp-ffi-qemu-linux-release-riscv64-try,vm-precomp-ffi-qemu-linux-release-arm-try,vm-ffi-android-debug-arm64c-try,vm-ffi-android-debug-arm-try,vm-reload-rollback-linux-debug-x64-try,analyzer-analysis-server-linux-try,analyzer-linux-release-try
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/289781
Reviewed-by: Devon Carew <devoncarew@google.com>
Reviewed-by: Johnni Winther <johnniwinther@google.com>
Commit-Queue: Daco Harkes <dacoharkes@google.com>
Reviewed-by: Brian Wilkerson <brianwilkerson@google.com>
2023-03-21 15:25:10 +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 Reland "[vm/ffi] Add class modifiers" 2023-03-21 15:25:10 +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).