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-rw-r--r--src/zerror.js47
1 files changed, 47 insertions, 0 deletions
diff --git a/src/zerror.js b/src/zerror.js
new file mode 100644
index 0000000..1a779de
--- /dev/null
+++ b/src/zerror.js
@@ -0,0 +1,47 @@
+"use strict";
+
+var Zmodem = module.exports;
+
+function _crc_message(got, expected) {
+ this.got = got.slice(0);
+ this.expected = expected.slice(0);
+ return "CRC check failed! (got: " + got.join() + "; expected: " + expected.join() + ")";
+}
+
+function _pass(val) { return val }
+
+const TYPE_MESSAGE = {
+ aborted: "Session aborted",
+ peer_aborted: "Peer aborted session",
+ already_aborted: "Session already aborted",
+ crc: _crc_message,
+ validation: _pass,
+};
+
+function _generate_message(type) {
+ const msg = TYPE_MESSAGE[type];
+ switch (typeof msg) {
+ case "string":
+ return msg;
+ case "function":
+ var args_after_type = [].slice.call(arguments).slice(1);
+ return msg.apply(this, args_after_type);
+ }
+
+ return null;
+}
+
+Zmodem.Error = class ZmodemError extends Error {
+ constructor(msg_or_type) {
+ super();
+
+ var generated = _generate_message.apply(this, arguments);
+ if (generated) {
+ this.type = msg_or_type;
+ this.message = generated;
+ }
+ else {
+ this.message = msg_or_type;
+ }
+ }
+};