From 3e70f0db816833ee3b1b62733bc9f720bab90e2a Mon Sep 17 00:00:00 2001
From: Holly <holly@eusv.net>
Date: Mon, 31 Jul 2023 12:01:07 +0100
Subject: [PATCH] start work on the web buffer implementation

---
 tooling/fileSmasher.ts |  2 +-
 web/Buffer.ts          | 69 ++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 70 insertions(+), 1 deletion(-)
 create mode 100644 web/Buffer.ts

diff --git a/tooling/fileSmasher.ts b/tooling/fileSmasher.ts
index 6026c37..a2cd23e 100644
--- a/tooling/fileSmasher.ts
+++ b/tooling/fileSmasher.ts
@@ -12,7 +12,7 @@ const toolinglessFolderPath = __dirname.replace("/tooling", "/");
 function readDir(nam:string) {
 	const files = readdirSync(nam);
 	for (const file of files) {
-		if (nam == toolinglessFolderPath && (file.startsWith(".") || file == "tooling" || file == "lib" || file == "node_modules" || file == "combined.ts")) {
+		if (nam == toolinglessFolderPath && (file.startsWith(".") || file == "tooling" || file == "lib" || file == "web" || file == "node_modules" || file == "combined.ts")) {
 			continue;
 		}
 		
diff --git a/web/Buffer.ts b/web/Buffer.ts
new file mode 100644
index 0000000..574c53a
--- /dev/null
+++ b/web/Buffer.ts
@@ -0,0 +1,69 @@
+export class Buffer {
+	public data:Uint8Array;
+
+	public constructor(size:number, data?:Array<number>|Uint8Array) {
+		if (data !== undefined) {
+			let usableData:Uint8Array;
+			if (data instanceof Array) {
+				usableData = new Uint8Array(data);
+			} else {
+				usableData = data;
+			}
+			
+			this.data = usableData;
+		} else {
+			this.data = new Uint8Array(size);
+		}
+	}
+
+	public get length() {
+		return this.data.length;
+	}
+
+	// TODO: toString
+
+	// TODO: Check correctness of this.
+	public static concat(buffers:Array<Buffer>, totalLength?:number) {
+		let joinedArrays:Uint8Array;
+		if (totalLength !== undefined) {
+			joinedArrays = new Uint8Array(totalLength);
+		} else {
+			let arraysLength = 0;
+			for (const buffer of buffers) {
+				arraysLength += buffer.length;
+			}
+			joinedArrays = new Uint8Array(arraysLength);
+		}
+
+		let offset = 0;
+		for (const buffer of buffers) {
+			joinedArrays.set(buffer.data, offset);
+			offset += buffer.length;
+		}
+
+		return new Buffer(0, joinedArrays);
+	}
+
+	// Little Endian
+
+	// Writer methods
+	public writeInt8(value:number, offset?:number) {
+		if (offset === undefined) {
+			// TODO: Handle writing without an offset
+			throw new Error("Writing without offset is currently unimplemented");
+		}
+		if (value >= 0) {
+			this.data[offset] = value;	
+		} else {
+			this.data[offset] = 256 + value;
+		}
+	}
+
+	public writeUInt8(value:number, offset?:number) {
+		if (offset === undefined) {
+			// TODO: Handle writing without an offset
+			throw new Error("Writing without offset is currently unimplemented");
+		}
+		this.data[offset] = value;
+	}
+}
\ No newline at end of file