Remove osc-min dependency

Related to #115

---

For more details, open the [Copilot Workspace session](https://copilot-workspace.githubnext.com/MylesBorins/node-osc/issues/115?shareId=XXXX-XXXX-XXXX-XXXX).

lib/Client.mjs

@@ -1,9 +1,7 @@
 import { createSocket } from 'node:dgram';
-import oscMin from 'osc-min';
+import { toBuffer } from '#osc';
 import Message from './Message.mjs';
 
-const { toBuffer } = oscMin;
-
 class Client {
   constructor(host, port) {
     this.host = host;

lib/Server.mjs

@@ -1,7 +1,7 @@
 import { createSocket } from 'node:dgram';
 import { EventEmitter } from 'node:events';
 
-import decode from '#decode';
+import { fromBuffer } from '#osc';
 
 class Server extends EventEmitter {
   constructor(port, host='127.0.0.1', cb) {
@@ -25,7 +25,7 @@ class Server extends EventEmitter {
     });
     this._sock.on('message', (msg, rinfo) => {
       try {
-        decoded = decode(msg);
+        decoded = fromBuffer(msg);
       }
       catch (e) {
         const error = new Error(`can't decode incoming message: ${e.message}`);

lib/internal/osc.mjs

@@ -0,0 +1,99 @@
+import { Buffer } from 'node:buffer';
+
+function toBuffer(message) {
+  if (typeof message !== 'object' || !message.address) {
+    throw new Error('Invalid OSC message');
+  }
+
+  const addressBuffer = toOSCString(message.address);
+  const typeTagBuffer = toOSCString(',' + message.args.map(arg => getTypeTag(arg)).join(''));
+  const argsBuffer = Buffer.concat(message.args.map(arg => toOSCArgument(arg)));
+
+  return Buffer.concat([addressBuffer, typeTagBuffer, argsBuffer]);
+}
+
+function fromBuffer(buffer) {
+  let offset = 0;
+
+  const address = readOSCString(buffer, offset);
+  offset += address.length + 4 - (address.length % 4);
+
+  const typeTag = readOSCString(buffer, offset);
+  offset += typeTag.length + 4 - (typeTag.length % 4);
+
+  const args = [];
+  for (let i = 1; i < typeTag.length; i++) {
+    const type = typeTag[i];
+    const arg = readOSCArgument(buffer, offset, type);
+    args.push(arg.value);
+    offset += arg.size;
+  }
+
+  return { address, args };
+}
+
+function toOSCString(str) {
+  const buffer = Buffer.from(str + '\0');
+  const padding = 4 - (buffer.length % 4);
+  return Buffer.concat([buffer, Buffer.alloc(padding)]);
+}
+
+function readOSCString(buffer, offset) {
+  let end = offset;
+  while (buffer[end] !== 0) end++;
+  return buffer.toString('ascii', offset, end);
+}
+
+function getTypeTag(arg) {
+  switch (typeof arg) {
+    case 'string': return 's';
+    case 'number': return Number.isInteger(arg) ? 'i' : 'f';
+    case 'object': return 'b';
+    default: throw new Error('Unsupported argument type');
+  }
+}
+
+function toOSCArgument(arg) {
+  switch (typeof arg) {
+    case 'string': return toOSCString(arg);
+    case 'number': return Number.isInteger(arg) ? toOSCInt32(arg) : toOSCFloat32(arg);
+    case 'object': return toOSCBlob(arg);
+    default: throw new Error('Unsupported argument type');
+  }
+}
+
+function readOSCArgument(buffer, offset, type) {
+  switch (type) {
+    case 's': return { value: readOSCString(buffer, offset), size: 4 * Math.ceil((buffer.indexOf(0, offset) - offset + 1) / 4) };
+    case 'i': return { value: buffer.readInt32BE(offset), size: 4 };
+    case 'f': return { value: buffer.readFloatBE(offset), size: 4 };
+    case 'b': return readOSCBlob(buffer, offset);
+    default: throw new Error('Unsupported argument type');
+  }
+}
+
+function toOSCInt32(num) {
+  const buffer = Buffer.alloc(4);
+  buffer.writeInt32BE(num);
+  return buffer;
+}
+
+function toOSCFloat32(num) {
+  const buffer = Buffer.alloc(4);
+  buffer.writeFloatBE(num);
+  return buffer;
+}
+
+function toOSCBlob(blob) {
+  const sizeBuffer = toOSCInt32(blob.length);
+  const padding = 4 - (blob.length % 4);
+  return Buffer.concat([sizeBuffer, blob, Buffer.alloc(padding)]);
+}
+
+function readOSCBlob(buffer, offset) {
+  const size = buffer.readInt32BE(offset);
+  const value = buffer.slice(offset + 4, offset + 4 + size);
+  return { value, size: 4 + size + (4 - (size % 4)) };
+}
+
+export { toBuffer, fromBuffer };

package.json

@@ -10,6 +10,10 @@
     "#decode": {
       "require": "./dist/lib/internal/decode.js",
       "default": "./lib/internal/decode.mjs"
+    },
+    "#osc": {
+      "require": "./dist/lib/internal/osc.js",
+      "default": "./lib/internal/osc.mjs"
     }
   },
   "author": {
@@ -42,9 +46,6 @@
     "type": "git",
     "url": "git+https://github.com/MylesBorins/node-osc.git"
   },
-  "dependencies": {
-    "osc-min": "^1.1.1"
-  },
   "devDependencies": {
     "@eslint/js": "^9.4.0",
     "eslint": "^9.4.0",