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mergeInto(LibraryManager.library, {
$TTY__deps: ['$FS'],
$TTY__postset: '__ATINIT__.unshift({ func: function() { TTY.init() } });' +
'__ATEXIT__.push({ func: function() { TTY.shutdown() } });' +
'TTY.utf8 = new Runtime.UTF8Processor();',
$TTY: {
ttys: [],
init: function () {
// https://github.com/kripken/emscripten/pull/1555
// if (ENVIRONMENT_IS_NODE) {
// // currently, FS.init does not distinguish if process.stdin is a file or TTY
// // device, it always assumes it's a TTY device. because of this, we're forcing
// // process.stdin to UTF8 encoding to at least make stdin reading compatible
// // with text files until FS.init can be refactored.
// process['stdin']['setEncoding']('utf8');
// }
},
shutdown: function() {
// https://github.com/kripken/emscripten/pull/1555
// if (ENVIRONMENT_IS_NODE) {
// // inolen: any idea as to why node -e 'process.stdin.read()' wouldn't exit immediately (with process.stdin being a tty)?
// // isaacs: because now it's reading from the stream, you've expressed interest in it, so that read() kicks off a _read() which creates a ReadReq operation
// // inolen: I thought read() in that case was a synchronous operation that just grabbed some amount of buffered data if it exists?
// // isaacs: it is. but it also triggers a _read() call, which calls readStart() on the handle
// // isaacs: do process.stdin.pause() and i'd think it'd probably close the pending call
// process['stdin']['pause']();
// }
},
register: function(dev, ops) {
TTY.ttys[dev] = { input: [], output: [], ops: ops };
FS.registerDevice(dev, TTY.stream_ops);
},
stream_ops: {
open: function(stream) {
var tty = TTY.ttys[stream.node.rdev];
if (!tty) {
throw new FS.ErrnoError(ERRNO_CODES.ENODEV);
}
stream.tty = tty;
stream.seekable = false;
},
close: function(stream) {
// flush any pending line data
if (stream.tty.output.length) {
stream.tty.ops.put_char(stream.tty, {{{ charCode('\n') }}});
}
},
read: function(stream, buffer, offset, length, pos /* ignored */) {
if (!stream.tty || !stream.tty.ops.get_char) {
throw new FS.ErrnoError(ERRNO_CODES.ENXIO);
}
var bytesRead = 0;
for (var i = 0; i < length; i++) {
var result;
try {
result = stream.tty.ops.get_char(stream.tty);
} catch (e) {
throw new FS.ErrnoError(ERRNO_CODES.EIO);
}
if (result === undefined && bytesRead === 0) {
throw new FS.ErrnoError(ERRNO_CODES.EAGAIN);
}
if (result === null || result === undefined) break;
bytesRead++;
buffer[offset+i] = result;
}
if (bytesRead) {
stream.node.timestamp = Date.now();
}
return bytesRead;
},
write: function(stream, buffer, offset, length, pos) {
if (!stream.tty || !stream.tty.ops.put_char) {
throw new FS.ErrnoError(ERRNO_CODES.ENXIO);
}
for (var i = 0; i < length; i++) {
try {
stream.tty.ops.put_char(stream.tty, buffer[offset+i]);
} catch (e) {
throw new FS.ErrnoError(ERRNO_CODES.EIO);
}
}
if (length) {
stream.node.timestamp = Date.now();
}
return i;
}
},
default_tty_ops: {
// get_char has 3 particular return values:
// a.) the next character represented as an integer
// b.) undefined to signal that no data is currently available
// c.) null to signal an EOF
get_char: function(tty) {
if (!tty.input.length) {
var result = null;
if (ENVIRONMENT_IS_NODE) {
result = process['stdin']['read']();
if (!result) {
if (process['stdin']['_readableState'] && process['stdin']['_readableState']['ended']) {
return null; // EOF
}
return undefined; // no data available
}
} else if (typeof window != 'undefined' &&
typeof window.prompt == 'function') {
// Browser.
result = window.prompt('Input: '); // returns null on cancel
if (result !== null) {
result += '\n';
}
} else if (typeof readline == 'function') {
// Command line.
result = readline();
if (result !== null) {
result += '\n';
}
}
if (!result) {
return null;
}
tty.input = intArrayFromString(result, true);
}
return tty.input.shift();
},
put_char: function(tty, val) {
if (val === null || val === {{{ charCode('\n') }}}) {
Module['print'](tty.output.join(''));
tty.output = [];
} else {
tty.output.push(TTY.utf8.processCChar(val));
}
}
},
default_tty1_ops: {
put_char: function(tty, val) {
if (val === null || val === {{{ charCode('\n') }}}) {
Module['printErr'](tty.output.join(''));
tty.output = [];
} else {
tty.output.push(TTY.utf8.processCChar(val));
}
}
}
}
});
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