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assembler - Move 'main' up top

This commit is contained in:
n loewen 2023-09-02 16:45:38 -04:00
parent e25723fcc9
commit c8c188e55a
1 changed files with 29 additions and 28 deletions
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57
src/assembler.js
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@ -9,11 +9,37 @@ const DBG = require('./dbg.js');
const CFG = require('./machine.config.js'); const CFG = require('./machine.config.js');
// Configure pseudo-ops: /** MAIN **/
// Handle command-line options...
const opts = new Opter(process.argv);
opts.synonymize('-d', '--debug');
opts.requireOption('-i', 'Input file required (-i prog.asm)');
opts.requireOptionArgument('-i', 1, 1, 'Input file required (-i prog.asm)');
opts.requireOptionArgument('-o', 1, 1, 'Missing output file name (-o prog.asm)');
const inputFilename = opts.opts.i[0];
const inputFile_str = fs.readFileSync(inputFilename, 'utf8');
let outputFileProvided = opts.contains('-o');
let returnOnStdout = !outputFileProvided;
let outputFilename = outputFileProvided ? opts.opts.o[0] : null;
let outputWithMetadata = opts.contains('--debug');
// Initialize debugger...
const dbg = returnOnStdout ? new DBG('none') : new DBG('nitpick');
// Assemble...!
assemble(inputFile_str, outputFilename, outputWithMetadata);
/** Configure pseudo-ops **/
const ASM_IP_LABEL = '*'; const ASM_IP_LABEL = '*';
const ASM_CONSTANT_PREFIX = '#'; const ASM_CONSTANT_PREFIX = '#';
const ASM_LABEL_PREFIX = '@'; const ASM_LABEL_PREFIX = '@';
/** Configure mnemonics **/
const mnemonicsWithOptionalArgs = ['end', 'nop']; const mnemonicsWithOptionalArgs = ['end', 'nop'];
const mnemonics2opcodes = { const mnemonics2opcodes = {
end: { direct: 0, indirect: 0 }, end: { direct: 0, indirect: 0 },
@ -402,32 +428,6 @@ function stripWhitespaceFromEnds(line) {
return line; return line;
} }
/** MAIN **/
// Handle command-line options...
const opts = new Opter(process.argv);
opts.synonymize('-d', '--debug');
opts.requireOption('-i', 'Input file required (-i prog.asm)');
opts.requireOptionArgument('-i', 1, 1, 'Input file required (-i prog.asm)');
opts.requireOptionArgument('-o', 1, 1, 'Missing output file name (-o prog.asm)');
const inputFilename = opts.opts.i[0];
const inputFile_str = fs.readFileSync(inputFilename, 'utf8');
let outputFileProvided = opts.contains('-o');
let returnOnStdout = !outputFileProvided;
let outputFilename = outputFileProvided ? opts.opts.o[0] : null;
let outputWithMetadata = opts.contains('--debug');
// Initialize debugger...
const dbg = returnOnStdout ? new DBG('none') : new DBG('nitpick');
// Assemble...!
assemble(inputFile_str, outputFilename, outputWithMetadata);
/** /**
* Assemble source code into machine code. * Assemble source code into machine code.
* If 'includeMetadata' is true, a JSON object containing * If 'includeMetadata' is true, a JSON object containing
@ -450,4 +450,5 @@ function assemble(sourceCode, outputFile='out.txt', includeMetadata=false) {
const debugJSON = JSON.stringify(out); const debugJSON = JSON.stringify(out);
fs.writeFileSync(outputFile, debugJSON); fs.writeFileSync(outputFile, debugJSON);
} }
} }