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Move Gir to use modules

This commit is contained in:
Juhani Krekelä 2018-05-27 20:54:59 +00:00
parent e203efdb47
commit 21832b0bb5
4 changed files with 58 additions and 7 deletions
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6
README.md
View File

@ -18,12 +18,16 @@ Gir supports following optimizations:
* Add offsets to commands that modify tape, to reduce moving tape head
* Turn multiply loops into one command
Examples
--------
`ircbot.js` is an implementation of an IRC bot's brainfuck interpreter
function. Smaller examples are available in `api.md`
TODO
----
### gir.html
* Implement a UI
### General
* Make Gir use modules
* Get this on NPM?
* Move into subdirectories?

17
gir.html
View File

@ -3,8 +3,23 @@
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Gir testbench</title>
<script type="text/javascript">
// Implement "module" support
let exports = {};
</script>
<script type="text/javascript" src="gir.js"></script>
<script type="text/javascript" src="example.js"></script>
<script type="text/javascript">
let girExports = exports;
// Implement "module" support
// This is possibly not quite compliant
function require(string) {
return girExports;
}
require.main = 'foo';
module = 'bar';
exports = {};
</script>
<script type="text/javascript" src="ircbot.js"></script>
</head>
<html>
<p>Open the JavaScript console</p>

7
gir.js
View File

@ -947,3 +947,10 @@ function decodeUTF8(encoded) {
function compile(program, enableExtensions = true) {
return optimize(parse(program, enableExtensions));
}
exports.compile = compile;
exports.prettifyIR = prettifyIR;
exports.newVM = newVM;
exports.runVM = runVM;
exports.encodeUTF8 = encodeUTF8;
exports.decodeUTF8 = decodeUTF8;

35
example.js → ircbot.js
View File

@ -1,5 +1,7 @@
'use strict';
const gir = require('./gir.js');
class IntParseError extends Error {}
const programCacheSize = 16;
@ -15,7 +17,7 @@ function cachedCompile(program, enableExtensions = true) {
programCache.delete(program);
}
let compiled = compile(program, enableExtensions);
let compiled = gir.compile(program, enableExtensions);
programCache.set(program, {compiled: compiled,
extensions: enableExtensions});
@ -58,10 +60,10 @@ function cachedCompile(program, enableExtensions = true) {
// (string, string, int) → string
function ircbotRun(program, input, maxCycles = 400000) {
let compiled = cachedCompile(program);
let vm = newVM(compiled, encodeUTF8(input));
let vm = gir.newVM(compiled, gir.encodeUTF8(input));
let result = runVM(vm, maxCycles);
let output = decodeUTF8(result.state.output);
let result = gir.runVM(vm, maxCycles);
let output = gir.decodeUTF8(result.state.output);
// Replace all characters < 0x20 except for IRC formatting codes
// with their graphical representations at U+24xx
@ -157,9 +159,32 @@ function ircbotRun(program, input, maxCycles = 400000) {
// If there was a problem with parsing an int, throw an Error
if(result.intParseFailed) {
let context = decodeUTF8(result.state.input).slice(0, 3);
let context = gir.decodeUTF8(result.state.input).slice(0, 3);
throw new IntParseError(`';': couldn't read number (near '${context})'`);
}
return output;
}
exports.ircbotRun = ircbotRun;
function main() {
const readline = require('readline');
const rl = readline.createInterface({
input: process.stdin,
output: process.stdout,
prompt: 'program!input> '
});
rl.prompt();
rl.on('line', line => {
let [program, input] = line.split('!');
console.log(ircbotRun(program, input));
rl.prompt();
});
}
if(require.main === module) {
main();
}