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57 lines
2.4 KiB
JavaScript

8 months ago
"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.unixWrite = void 0;
const fs_1 = require("fs");
const debug_1 = __importDefault(require("debug"));
const util_1 = require("util");
const logger = (0, debug_1.default)('serialport/bindings-cpp/unixWrite');
const writeAsync = (0, util_1.promisify)(fs_1.write);
const writable = (binding) => {
return new Promise((resolve, reject) => {
binding.poller.once('writable', err => (err ? reject(err) : resolve()));
});
};
const unixWrite = async ({ binding, buffer, offset = 0, fsWriteAsync = writeAsync }) => {
const bytesToWrite = buffer.length - offset;
logger('Starting write', buffer.length, 'bytes offset', offset, 'bytesToWrite', bytesToWrite);
if (!binding.isOpen || !binding.fd) {
throw new Error('Port is not open');
}
try {
const { bytesWritten } = await fsWriteAsync(binding.fd, buffer, offset, bytesToWrite);
logger('write returned: wrote', bytesWritten, 'bytes');
if (bytesWritten + offset < buffer.length) {
if (!binding.isOpen) {
throw new Error('Port is not open');
}
return (0, exports.unixWrite)({ binding, buffer, offset: bytesWritten + offset, fsWriteAsync });
}
logger('Finished writing', bytesWritten + offset, 'bytes');
}
catch (err) {
logger('write errored', err);
if (err.code === 'EAGAIN' || err.code === 'EWOULDBLOCK' || err.code === 'EINTR') {
if (!binding.isOpen) {
throw new Error('Port is not open');
}
logger('waiting for writable because of code:', err.code);
await writable(binding);
return (0, exports.unixWrite)({ binding, buffer, offset, fsWriteAsync });
}
const disconnectError = err.code === 'EBADF' || // Bad file number means we got closed
err.code === 'ENXIO' || // No such device or address probably usb disconnect
err.code === 'UNKNOWN' ||
err.errno === -1; // generic error
if (disconnectError) {
err.disconnect = true;
logger('disconnecting', err);
}
logger('error', err);
throw err;
}
};
exports.unixWrite = unixWrite;