bf
所属分类：collect
开发工具：kotlin
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上传日期：2023-06-03 10:21:02
上 传 者：
sh-1993
说明： 具有多个目标后端的优化brainf*ck编译器：JVM、smali、dex、C、LLVM-IR、ARM、WASM、JavaScript和Lox。
(An optimizing brainf*ck compiler with multiple target backends: JVM, smali, dex, C, LLVM IR, ARM, WASM, JavaScript and Lox.)
文件列表:
LICENSE (1071, 2023-09-27)
bin/ (0, 2023-09-27)
bin/bf (35, 2023-09-27)
build.gradle.kts (2052, 2023-09-27)
examples/ (0, 2023-09-27)
examples/helloworld.bf (123, 2023-09-27)
gradle.properties (27, 2023-09-27)
gradle/ (0, 2023-09-27)
gradle/wrapper/ (0, 2023-09-27)
gradle/wrapper/gradle-wrapper.jar (59536, 2023-09-27)
gradle/wrapper/gradle-wrapper.properties (201, 2023-09-27)
gradlew (8070, 2023-09-27)
gradlew.bat (2674, 2023-09-27)
settings.gradle.kts (25, 2023-09-27)
src/ (0, 2023-09-27)
src/main/ (0, 2023-09-27)
src/main/kotlin/ (0, 2023-09-27)
src/main/kotlin/eu/ (0, 2023-09-27)
src/main/kotlin/eu/jameshamilton/ (0, 2023-09-27)
src/main/kotlin/eu/jameshamilton/bf/ (0, 2023-09-27)
src/main/kotlin/eu/jameshamilton/bf/Main.kt (2316, 2023-09-27)
src/main/kotlin/eu/jameshamilton/bf/backend/ (0, 2023-09-27)
src/main/kotlin/eu/jameshamilton/bf/backend/CodeGenerator.kt (189, 2023-09-27)
src/main/kotlin/eu/jameshamilton/bf/backend/arm/ (0, 2023-09-27)
src/main/kotlin/eu/jameshamilton/bf/backend/arm/ArmCodeGenerator.kt (2599, 2023-09-27)
src/main/kotlin/eu/jameshamilton/bf/backend/c/ (0, 2023-09-27)
src/main/kotlin/eu/jameshamilton/bf/backend/c/CCodeGenerator.kt (2181, 2023-09-27)
src/main/kotlin/eu/jameshamilton/bf/backend/dex/ (0, 2023-09-27)
src/main/kotlin/eu/jameshamilton/bf/backend/dex/DexCodeGenerator.kt (4617, 2023-09-27)
src/main/kotlin/eu/jameshamilton/bf/backend/js/ (0, 2023-09-27)
src/main/kotlin/eu/jameshamilton/bf/backend/js/JsCodeGenerator.kt (2426, 2023-09-27)
src/main/kotlin/eu/jameshamilton/bf/backend/jvm/ (0, 2023-09-27)
src/main/kotlin/eu/jameshamilton/bf/backend/jvm/ClassPoolClassLoader.kt (918, 2023-09-27)
src/main/kotlin/eu/jameshamilton/bf/backend/jvm/ComposerExt.kt (3368, 2023-09-27)
src/main/kotlin/eu/jameshamilton/bf/backend/jvm/JvmCodeGenerator.kt (5825, 2023-09-27)
src/main/kotlin/eu/jameshamilton/bf/backend/llvm/ (0, 2023-09-27)
src/main/kotlin/eu/jameshamilton/bf/backend/llvm/LlvmCodeGenerator.kt (3722, 2023-09-27)
src/main/kotlin/eu/jameshamilton/bf/backend/lox/ (0, 2023-09-27)
... ...
# An optimizing Brainf*ck compiler
An optimizing [brainf*ck](http://brainfuck.org/brainfuck.html) compiler with multiple target backends:
JVM using [ProGuardCORE](https://github.com/guardsquare/proguard-core) for code generation,
[smali](https://github.com/JesusFreke/smali), dex using [BAT](https://github.com/netomi/bat),
C, LLVM IR, ARM assembly, WASM and JavaScript.
Some optimizations are applied before code generation:
* Zero-ing loops (`[+]` / `[-]`) are represented as a single instruction
* Consecutive zero-ing instructions are merged
* Consecutive move and add instructions are merged into single instructions with an amount parameter
* Zero moves/adds are removed
* Top-level loops before memory updates are removed
## Building
```shell
./gradlew build
```
The build task will execute all tests and create an output jar `lib/bf.jar`.
## Executing
A wrapper script `bin/bf` is provided for convenience in the `bin/` directory:
```shell
$ bin/bf --help
Usage: bf options_list
Arguments:
script -> brainf*ck script { String }
Options:
--output, -o -> output { String }
--target, -t [JVM] -> target { Value should be one of [jvm, c, llvm, smali] }
--debug, -d [false]
--help, -h -> Usage info
```
By default, `bf` will compile a provided brainf*ck script for the JVM and execute it. The compiler
can instead generate a jar file with the `-o` option.
### JVM (default)
```shell
$ bin/bf examples/helloworld.bf -t jvm -o helloworld.jar
$ java -jar helloworld.jar
```
### Smali (Dalvik assembler)
```shell
$ bin/bf examples/helloworld.bf -t smali -o helloworld.smali
$ smali a helloworld.smali -o classes.dex
$ adb push classes.dex /sdcard/Download/classes.dex
$ adb shell dalvikvm -cp /sdcard/Download/classes.dex Main
```
### Dex
```shell
$ bin/bf examples/helloworld.bf -t dex -o helloworld.dex
$ adb push helloworld.dex /sdcard/Download/helloworld.dex
$ adb shell dalvikvm -cp /sdcard/Download/helloworld.dex Main
```
### C
```shell
$ bin/bf examples/helloworld.bf -t c -o helloworld.c
$ gcc helloworld.c -o helloworld && ./helloworld
```
### LLVM IR
```shell
$ bin/bf examples/helloworld.bf -t llvm -o helloworld.ll
$ lli helloworld.ll
```
### ARM assembly
```shell
$ bin/bf examples/helloworld.bf -t arm -o helloworld.s
$ arm-none-eabi-as helloworld.s -o helloworld.o
$ arm-none-eabi-ld helloworld.o -o helloworld
$ qemu-arm ./helloworld
```
### WASM
```shell
$ bin/bf examples/helloworld.bf -t wasm -o helloworld.wat
$ wasmtime helloworld.wat
```
### JavaScript
```shell
$ bin/bf examples/helloworld.bf -t js -o helloworld.js
$ nodejs helloworld.js
```
Inputs for the Javascript version are passed as command-line arguments.
### Lox
[Lox](https://github.com/munificent/craftinginterpreters) doesn't provide any built-in way
to convert ASCII character codes to characters, and the built-in `print` function always prints newlines,
but we can use `awk` to convert ASCII codes to characters while merging all the lines together.
```shell
$ bin/bf examples/helloworld.bf -t lox -o helloworld.lox
$ jlox helloworld.lox | awk '{printf("%c", $1)}' ORS=' '
```
Lox also doesn't provide any ability to receive inputs so the inputs to a program
can be compiled directly into it by using the `bf` `--input` option.
# Useful brainf*ck resources
* [Brainf*ck language reference](http://brainfuck.org/brainfuck.html)
* [Sample programs by Daniel B Cristofani](http://brainfuck.org/)
* [Optimizing brainf*ck programs](http://calmerthanyouare.org/2015/01/07/optimizing-brainfuck.html)
* [Brainf*ck Wikipedia article](https://en.wikipedia.org/wiki/Brainfuck)
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