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octo
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#!/usr/bin/env node
// simple piped commandline octo compiler
"use strict";
const compiler = require('./js/compiler')
const decompiler = require('./js/decompiler')
const sharing = require('./js/sharing')
const fs = require('fs')
const path = require('path')
const defaults = {
tickrate:20,
fillColor:"#FFCC00",
fillColor2:"#FF6600",
blendColor:"#662200",
backgroundColor:"#996600",
buzzColor:"#FFAA00",
quietColor:"#000000",
shiftQuirks:false,
loadStoreQuirks:false,
vfOrderQuirks:false,
clipQuirks:false,
jumpQuirks:false,
logicQuirks:false,
vBlankQuirks:false,
screenRotation:0,
maxSize:3584,
touchInputMode:'none',
fontStyle:'octo',
displayScale:'6',
}
/**
*
* Utilities:
*
**/
const zeroes = '00000000'
global.maskFormat = mask => options.numericMask ? numericFormat(mask) : binaryFormat(mask)
global.numericFormat = num => options.numericFormat=='dec'?decimalFormat(num):
options.numericFormat=='bin'?binaryFormat(num): hexFormat(num)
global.decimalFormat = num => num.toString(10)
global.hexFormat = num => {
const hex=num.toString(16).toUpperCase()
return '0x'+zeroPad(hex.length,2)+hex
}
global.binaryFormat = num => {
const bin=num.toString(2)
return '0b'+zeroPad(bin.length,8)+bin
}
function zeroPad(strLen, byteLength) {
const dif=strLen%byteLength
return dif==0 ? '' : zeroes.substr(0, byteLength-dif);
}
function extractFlag(name) {
const index=process.argv.indexOf(name)
if (index==-1) return false
process.argv.splice(index,1)
return true
}
function extractParameter(name) {
const index=process.argv.indexOf(name)
if (index==-1) return null
const val=process.argv[index+1]
process.argv.splice(index,2)
return val
}
function readTextFile(path) {
// files from some systems might include a byte-order mark (BOM):
return fs.readFileSync(path, { encoding:'utf8' }).replace(/\uFEFF/g, '')
}
/**
*
* Operations:
*
**/
function compile(sourceCode) {
let comp;
try {
comp = new compiler.Compiler(sourceCode)
comp.go()
let len=comp.rom.length
while(comp.rom[len-1]===0) len-=1
return comp.rom.slice(0,len)
}
catch(err) {
let line=1, pos=1
if (comp.pos!=null) {
for(let x=0; x<comp.pos[1]-1; x++){
pos++;
if (sourceCode.charAt(x) == '\n') pos=1, line++
}
}
console.error("(%d:%d) %s", line, pos, err)
process.exit(1)
}
}
function compileFile(src, dst, options) {
const programText=readTextFile(src)
const programRom=compile(programText)
const programBinary=Buffer.from(programRom)
if (/\.gif$/i.test(dst)) {
const label=dst+'\n'+(new Date().toISOString().replace('T','\n'))
const payload={
created: new Date().toISOString(),
program: programText,
options: options,
}
fs.writeFileSync(dst, Buffer.from(sharing.buildCartridge(label,payload,null)), { encoding:'binary' })
}
if (/\.html$/i.test(dst)) {
const MAGIC_STRING = '<!-- Standalone Generated By Octo (octo-ide.com) -->\n'
let page = MAGIC_STRING + `<script>data=${JSON.stringify({
program: programText,
options: options,
rom: programRom,
})}</script>\n`;
([
{u:'./js/emulator.js', f:x=>`<script>${x}</script>\n`},
{u:'./js/shared.js', f:x=>`<script>${x}</script>\n`},
{u:'./js/input.js', f:x=>`<script>${x}</script>\n`},
{u:'standalone.html',f:x=>x},
]).forEach(x => page += x.f(readTextFile(path.resolve(__dirname, x.u))))
fs.writeFileSync(dst, page)
}
else if (dst) fs.writeFileSync(dst, programBinary, { encoding:'binary' })
else process.stdout.write(programBinary)
return programBinary
}
function decompileFile(src, dst, options) {
const buff=fs.readFileSync(src)
decompiler.analyze(buff, options)
const programText=decompiler.formatProgram(buff.length)
if (dst) fs.writeFileSync(dst, programText)
else console.log(programText)
return programText;
}
function roundTripDecompile(src, dst, options) {
let decompiledText=decompileFile(src, dst, options)
const startBinary=fs.readFileSync(src)
if (decompiledText=='') {
decompiler.analyze(startBinary,options)
decompiledText=decompiler.formatProgram(startBinary.length)
}
const endBinary=compile(decompiledText)
let mismatch=false
for(var x=0; x<Math.max(startBinary.length,endBinary.length); x++) {
const mishere=startBinary[x]!=endBinary[x]
if (!mishere) continue
if (!mismatch) console.error('round trip mismatch!')
mismatch |= mishere
console.error('%s: original: %s output: %s',
hexFormat(x + 0x200),
hexFormat(startBinary[x]),
hexFormat(endBinary[x])
)
}
if (startBinary.length!=endBinary.length) {
console.error('binary sizes do not match!')
mismatch=true
}
if (mismatch) process.exit(1)
}
function decodeCart(src,dst) {
try {
const cartBytes = fs.readFileSync(src)
const cartData = sharing.parseCartridge(cartBytes)
console.log('Successfully decoded Octo Cartridge...')
console.log('---------------------------------------------')
console.log('payload: '+cartData.program.length+' characters')
console.log('creation date: ', cartData.created || 'UNKNOWN')
console.log('sharing key: ', cartData.key || 'UNKNOWN')
console.log('options: ', JSON.stringify(cartData.options, null, '\t'))
if (dst) {
fs.writeFileSync(dst, cartData.program)
console.log('\nwrote payload to '+dst)
}
}
catch(e) {
console.log('Unable to decode Octo Cartridge from GIF file!')
console.log(e)
}
}
/**
*
* Top Level:
*
**/
const decompileFlag = extractFlag("--decompile")
const roundTripFlag = extractFlag("--roundtrip")
const optionsFile = extractParameter("--options")
if (process.argv.length <3 || process.argv.length>4) {
console.log("usage: octo [--decompile] [--options <file.json>] <source> [<destination>]")
console.log(" if <source> has a .gif extension, unpack an existing octo cartridge into source code.")
console.log(" if <destination> has a .gif extension, create an octo cartridge file.")
console.log(" if <destination> has an .html extension, create a standalone HTML5 build.")
console.log(" if the specified options file does not exist, a new template will be created.")
process.exit(1)
}
if (optionsFile&&!fs.existsSync(optionsFile)) fs.writeFileSync(optionsFile,JSON.stringify(defaults,null,'\t'))
const sourceFile = process.argv[2]
const destFile = process.argv[3]
const options = optionsFile ? JSON.parse(readTextFile(optionsFile)) : {}
if (decompileFlag&&roundTripFlag) roundTripDecompile(sourceFile, destFile, options)
else if (decompileFlag) decompileFile (sourceFile, destFile, options)
else if (/\.gif$/i.test(sourceFile)) decodeCart (sourceFile, destFile)
else compileFile (sourceFile, destFile, options)