`fs.*Sync()`, `bun wiptest`, and More ™ (#106)

* very very wip

* almost ready to fix the errors

* Update identity_context.zig

* Update base.zig

* [bun test] It runs successfully

* Remove unnecessary call

* [Bun.js] Improve JS <> Zig unicode string interop

This fixes longstanding unicode bugs with `console.log` & `fetch`.

I believe @evanwashere reported this first awhile ago

* [Bun.js] Implement `Object.is()` binding and a way to set a timeout for script execution

* Update PLCrashReport.zig

* [Bun.js] Make `console.log` more closely match Node.js and Deno

* [Bun.js] Implement formatting specifier for console.*

* Implement `console.clear()`

* bug fix

* Support console.clear()

* Buffer stderr

* [bun test] Begin implementing Node.js `fs`

* Update darwin_c.zig

* Implement more of `fs`

* `mkdir`, `mkdir` recursive, `mkdtemp`

* `open`, `read` (and pread)

* Move some things into more files

* Implement readdir

* `readFile`, `readLink`, and `realpath`

* `writeFile`, `symlink`, `chown`, `rename`, `stat`, `unlink`, `truncate`

* `lutimes`

* Implement `SystemError` and begin wiring up the `fs` module

* `"fs"` - Most of the arguments / validation

* `fs` - Rest of the arguments / validations

* Begin wiring up the `fs` module

* Fix all the build errors

* support printing typed arrays in console.log

* It...works?

* Support `require("fs")`, `import fs from 'fs';`, `import * as fs from 'fs'`

* Fix a couple bugs

* get rid of the crash reporter for now

* Update fs.exports.js

* [bun.js] slight improvement to startup time

* [bun.js] Improve error message printing

* [Bun.js] Add `Bun.gc()` to run the garbage collector manually and report heap size

* [Bun.js] Add Bun.generateHeapSnapshot to return what JS types are using memory

* [Bun.js] Add `Bun.shrink()` to tell JSC to shrink the VM size

* Improve encoding reader

* [bun.js] Improve callback & microtask performance

* Update node_fs.zig

* Implement `console.assert`

* simple test

* [Bun.js] Prepare for multiple globals/realms to support testing

* Create callbacks-overhead.mjs

* Update http.zig

* [Bun.js] Implement `queueMicrotask`

* Add test for queueMicrotask

* :sleepy:

* [Bun.js] Implement `process.versions`, `process.pid`, `process.ppid`, `process.nextTick`, `process.versions`,

* Implement `process.env.toJSON()`

* [Bun.js] Improve performance of `fs.existsSync`

* :nail_care:

* [Bun.js] Implement `process.chdir(str)` and `process.cwd()`, support up to 4 args in `process.nextTick`

* Make creating Zig::Process lazy

* Split processi nto separte file

* [Bun.js] Node.js Streams - Part 1/?

* [Bun.js] Node.js streams 2/?

* WIP streams

* fix crash

* Reduce allocations in many places

* swap

* Make `bun` start 2ms faster

* Always use an apiLock()

* libBacktrace doesn't really work yet

* Fix crash in the upgrade checker

* Clean up code for importing the runtime when not bundling

* :camera:

* Update linker.zig

* 68!

* backtrace

* no, really backtrace

* Fix

* Linux fixes

* Fixes on Linux

* Update mimalloc

* [bun test] Automatically scan for {.test,_test,.spec,_spec}.{jsx,tsx,js,cts,mts,ts,cjs}

1 files changed, 97 insertions, 0 deletions

diff --git a/src/javascript/jsc/node/buffer.js b/src/javascript/jsc/node/buffer.js
new file mode 100644
index 000000000..faee19655
--- /dev/null
+++ b/src/javascript/jsc/node/buffer.js
@@ -0,0 +1,97 @@
+"use strict";
+
+function createBuffer(BufferPrototype, BufferStatic, Realm) {
+  "use strict";
+
+  var Uint8ArraySubarray = Realm.Uint8Array.prototype.subarray;
+  var isUint8Array = (value) => value instanceof Realm.Uint8Array;
+  var SymbolToPrimitive = Realm.Symbol.toPrimitive;
+  var isArray = Realm.Array.isArray;
+  var isArrayBufferLike =
+    "SharedArrayBuffer" in Realm
+      ? () =>
+          value instanceof Realm.ArrayBuffer ||
+          value instanceof Realm.SharedArrayBuffer
+      : () => value instanceof Realm.ArrayBuffer;
+
+  var BufferInstance = class BufferInstance extends Realm.Uint8Array {
+    constructor(bufferOrLength, byteOffset, length) {
+      super(bufferOrLength, byteOffset, length);
+    }
+
+    static isBuffer(obj) {
+      return obj instanceof BufferInstance;
+    }
+
+    static from(value, encodingOrOffset, length) {
+      switch (typeof value) {
+        case "string": {
+          return BufferStatic.fromString(value, encodingOrOffset, length);
+        }
+        case "object": {
+          if (isUint8Array(value)) {
+            return BufferStatic.fromUint8Array(value, encodingOrOffset, length);
+          }
+
+          if (isArrayBufferLike(value)) {
+            return new BufferInstance(value, 0, length);
+          }
+
+          const valueOf = value.valueOf && value.valueOf();
+          if (
+            valueOf != null &&
+            valueOf !== value &&
+            (typeof valueOf === "string" || typeof valueOf === "object")
+          ) {
+            return BufferInstance.from(valueOf, encodingOrOffset, length);
+          }
+
+          if (typeof value[SymbolToPrimitive] === "function") {
+            const primitive = value[SymbolToPrimitive]("string");
+            if (typeof primitive === "string") {
+              return BufferStatic.fromString(primitive, encodingOrOffset);
+            }
+          }
+
+          if (isArray(value)) {
+            return BufferStatic.fromArray(value, encodingOrOffset, length);
+          }
+        }
+      }
+
+      throw new TypeError(
+        "First argument must be a string, Buffer, ArrayBuffer, Array, or array-like object."
+      );
+    }
+
+    slice(start, end) {
+      return Uint8ArraySubarray.call(this, start, end);
+    }
+
+    static get poolSize() {
+      return BufferStatic._poolSize;
+    }
+
+    static set poolSize(value) {
+      BufferStatic._poolSize = value;
+    }
+
+    get parent() {
+      return this.buffer;
+    }
+
+    get offset() {
+      return this.byteOffset;
+    }
+  };
+
+  Object.assign(BufferInstance, BufferStatic);
+  Object.assign(BufferInstance.prototype, BufferPrototype);
+  Object.defineProperty(BufferInstance, "name", {
+    value: "Buffer",
+    configurable: false,
+    enumerable: false,
+  });
+
+  return BufferInstance;
+}