# aklomp-base64 を Homebrew, apk, chocolatey, MacPorts, scoop でインストール

aklomp-base64 のインストール経路、実行ファイル、メタデータ、AI エージェント向けセキュリティノートを確認します。

## インストール

```sh
sudo av install brew:aklomp-base64
```

追加のインストールコマンド:

### macOS

- Homebrew (100%):

```sh
brew install aklomp-base64
```

  証拠: local Homebrew formula metadata

- MacPorts (94%):

```sh
sudo port install base64
```

  証拠: MacPorts ports tree: mail/base64/Portfile from https://api.github.com/repos/macports/macports-ports/git/trees/master?recursive=1

### Linux

- apk (92%):

```sh
sudo apk add base64
```

  証拠: Alpine Linux edge package indexes: base64 from https://dl-cdn.alpinelinux.org/alpine/edge/main/x86_64/APKINDEX.tar.gz

### Windows

- Chocolatey (92%):

```sh
choco install base64
```

  証拠: Chocolatey community package catalog: base64 from http://community.chocolatey.org/api/v2/Packages?$filter=IsLatestVersion&$select=Id&$top=1000&$skiptoken='11','azurestorageemulator'

- Scoop (92%):

```sh
scoop install main/base64
```

  証拠: Scoop official bucket manifest trees: bucket/base64.json from https://api.github.com/repos/ScoopInstaller/Main/git/trees/master?recursive=1

## パッケージ情報

- **パッケージキー:** brew:aklomp-base64
- **パッケージマネージャ:** Homebrew
- **バージョン:** 0.5.2
- **ソース概要:** Fast Base64 stream encoder/decoder in C99, with SIMD acceleration
- **ホームページ:** <https://github.com/aklomp/base64>
- **リポジトリ:** <https://github.com/aklomp/base64>
- **生成日時:** 2026-08-03T19:37:03+00:00

## 実行可能ファイル

- base64 (エイリアス)

## インストール挙動

- Bottle: 利用不可

## バージョンと鮮度

- ページ生成日: 2026-08-03
- マネージャ版: 0.5.2
## プロジェクトの歴史と使われ方

aklomp/base64 is a fast C99 Base64 streaming encoder/decoder and library with SIMD and OpenMP acceleration. Homebrew installs it as `aklomp-base64` to avoid colliding conceptually with the standard `base64` utility while still shipping a standalone `base64`-style command.

### プロジェクトの歴史

The public GitHub repository was created in September 2013. The README says that, at the time of original release, the author believed it was the only Base64 library offering SIMD acceleration, and links to the author's article explaining a SIMD approach to Base64 encoding and decoding.

Over time the project accumulated multiple optimized codecs: SSSE3, SSE4.1, SSE4.2, AVX, AVX2, AVX512, NEON, AArch64/NEON, plain 32/64-bit fallback routines, and optional OpenMP parallelism. The README records contributions and influence from Inkymail's fork and Wojciech Mula's SIMD Base64 work.

### 採用の歴史

The project is packaged across several ecosystems in the supplied input facts: Homebrew as `aklomp-base64`, Alpine as `base64`, Chocolatey as `base64`, MacPorts as `base64`, and Scoop as `main/base64`.

Its adoption is mostly among users who need a faster streaming Base64 implementation or a small embeddable C library rather than among users seeking a new interface. The README emphasizes a self-contained object file, a matching C header, and a standalone test binary compatible with the system utility style.

### 使われ方

As a command-line tool, it reads and writes streaming Base64 data in the spirit of existing Unix `base64` programs. As a library, callers include `include/libbase64.h` and link `lib/libbase64.o` or their own build product.

The code chooses optimized codecs at runtime on x86, can be compiled with feature-specific flags, and exposes flags such as `BASE64_FORCE_AVX2`, `BASE64_FORCE_NEON64`, and `BASE64_FORCE_PLAIN` for testing or explicit selection.

### パッケージ好きにとっての重要性

This is the sort of package that package managers preserve because a tiny boring utility hides a lot of CPU-specific detail. The interesting part is not the command syntax; it is the portable packaging of SIMD code paths, runtime dispatch, and a fallback that still works on plain C99 targets.

The Homebrew formula name is also notable: `aklomp-base64` distinguishes this implementation from the platform-provided `base64`, which is exactly the naming problem binary package managers run into with faster replacements for POSIX-ish tools.

### タイムライン

- 2013: Public GitHub repository created.
- Original release period: README says the project was, to the author's knowledge, the only SIMD-accelerated Base64 library.
- Later: AVX2, NEON, AArch64/NEON, AVX512, and OpenMP paths are documented in the README.
- 2025: Repository metadata shows continued maintenance activity.

### Related projects

- Inkymail/base64: fork credited for original AVX2, NEON, and AArch64/NEON codec contributions.
- Wojciech Mula's Base64 SIMD work: source of optimizations and AVX512 encoder basis credited in the README.
- System `base64` utilities: the behavioral comparison point for the standalone binary.

### ソース

- <https://api.github.com/repos/aklomp/base64>
- <https://github.com/aklomp/base64>
- input source_facts.package-manager


## セキュリティノート

broad file, network, media, or database tool signal.

- **Geiger リスク:** blue / 中
- broad file, network, media, or database tool signal

## 他のパッケージマネージャ記録

- MacPorts - base64: installed executable or alias match | MacPorts ports tree: mail/base64/Portfile from https://api.github.com/repos/macports/macports-ports/git/trees/master?recursive=1
- apk - base64 - 0.5.2-r2: installed executable or alias match | Alpine Linux edge package indexes: base64 from https://dl-cdn.alpinelinux.org/alpine/edge/main/x86_64/APKINDEX.tar.gz | Fast Base64 stream encoder/decoder in C99, with SIMD acceleration | https://github.com/aklomp/base64
- apk - base64-dev - 0.5.2-r2: installed executable or alias match | Alpine Linux edge package indexes: base64-dev from https://dl-cdn.alpinelinux.org/alpine/edge/main/x86_64/APKINDEX.tar.gz | Fast Base64 stream encoder/decoder in C99, with SIMD acceleration (development files) | https://github.com/aklomp/base64
- apk - base64-static - 0.5.2-r2: installed executable or alias match | Alpine Linux edge package indexes: base64-static from https://dl-cdn.alpinelinux.org/alpine/edge/main/x86_64/APKINDEX.tar.gz | Fast Base64 stream encoder/decoder in C99, with SIMD acceleration (static library) | https://github.com/aklomp/base64
- apk - libbase64 - 0.5.2-r2: installed executable or alias match | Alpine Linux edge package indexes: libbase64 from https://dl-cdn.alpinelinux.org/alpine/edge/main/x86_64/APKINDEX.tar.gz | Fast Base64 stream encoder/decoder in C99, with SIMD acceleration (libraries) | https://github.com/aklomp/base64
- Chocolatey - base64: installed executable or alias match | Chocolatey community package catalog: base64 from http://community.chocolatey.org/api/v2/Packages?$filter=IsLatestVersion&$select=Id&$top=1000&$skiptoken='11','azurestorageemulator'
- Scoop - main/base64: installed executable or alias match | Scoop official bucket manifest trees: bucket/base64.json from https://api.github.com/repos/ScoopInstaller/Main/git/trees/master?recursive=1


## Combined YAML source

View the package source record on GitHub. [combined/aklomp-base64.yml](https://github.com/mxcl/pkgdb/blob/main/combined/aklomp-base64.yml)


## ソース

- pkg.so package database
- Geiger risk classifier
- curated package history
- pkgdb category and tag curation
- external package-manager database matches
- cross-ecosystem install command graph