https://github.com/clickingbuttons/datetime

Generic Date, Time, and DateTime library.
https://github.com/clickingbuttons/datetime

Last synced: 29 days ago
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Generic Date, Time, and DateTime library.

• Host: GitHub
• URL: https://github.com/clickingbuttons/datetime
• Owner: clickingbuttons
• License: mit
• Created: 2024-04-27T01:05:06.000Z (8 months ago)
• Default Branch: master
• Last Pushed: 2024-05-20T17:18:09.000Z (7 months ago)
• Last Synced: 2024-08-03T23:19:07.317Z (4 months ago)
• Language: Zig
• Size: 25.4 KB
• Stars: 6
• Watchers: 2
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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• awesome-zig - clickingbuttons/datetime

README

        
# datetime

![zig-version](https://img.shields.io/badge/dynamic/yaml?url=https%3A%2F%2Fraw.githubusercontent.com%2Fclickingbuttons%2Fdatetime%2Fmaster%2F.github%2Fworkflows%2Ftest.yml&query=%24.jobs.test.steps%5B1%5D.with.version&label=zig-version)

![tests](https://github.com/clickingbuttons/datetime/actions/workflows/test.yml/badge.svg)

[![docs](https://github.com/clickingbuttons/datetime/actions/workflows/publish_docs.yml/badge.svg)](https://clickingbuttons.github.io/datetime)

Generic Date, Time, and DateTime library.

## Installation

`build.zig.zon`

```zig

.{

    .name = "yourProject",

    .version = "0.0.1",

    .dependencies = .{

        .@"datetime" = .{

            .url = "https://github.com/clickingbuttons/datetime/archive/refs/tags/latest-release.tar.gz",

        },

    },

}

```

`build.zig`

```zig

const datetime = b.dependency("datetime", .{

    .target = target,

    .optimize = optimize,

});

your_lib_or_exe.root_module.addImport("datetime", datetime.module("datetime"));

```

Run `zig build` and then copy the expected hash into `build.zig.zon`.

## Usage

Check out [the demos](./demos.zig). Here's a simple one:

```zig

const std = @import("std");

const datetime = @import("datetime");

test "now" {

    const date = datetime.Date.now();

    std.debug.print("today's date is {rfc3339}\n", .{ date });

    const time = datetime.Time.now();

    std.debug.print("today's time is {rfc3339}\n", .{ time });

    const nanotime = datetime.time.Nano.now();

    std.debug.print("today's nanotime is {rfc3339}\n", .{ nanotime });

    const dt = datetime.DateTime.now();

    std.debug.print("today's date and time is {rfc3339}\n", .{ dt });

    const NanoDateTime = datetime.datetime.Advanced(datetime.Date, datetime.time.Nano, false);

    const ndt = NanoDateTime.now();

    std.debug.print("today's date and nanotime is {rfc3339}\n", .{ ndt });

}

```

Features:

- Convert to/from epoch subseconds using world's fastest known algorithm. [^1]

- Choose:

    - Date's `Year` type for more or less precision.

    - Time's `Subsecond` type for more or less precision.

    - Date's `epoch` for epoch subsecond conversion.

    - Whether DateTime has an `OffsetSeconds` field.

- Durations with addition.

- RFC3339 parsing and formatting.

    - Timezone offset.

- [ ] Localization

- [ ] Leap seconds

## Why yet another date time library?

- I frequently use different precisions for years, subseconds, and UTC offsets.

- Systems use different epochs and Zig aims to be a sytems language.

[^1]: [Euclidean Affine Functions by Cassio and Neri.](https://arxiv.org/pdf/2102.06959)