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node_modules/bufferutil/LICENSE

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+Copyright (c) 2011 Einar Otto Stangvik <einaros@gmail.com>
+Copyright (c) 2013 Arnout Kazemier and contributors
+Copyright (c) 2016 Luigi Pinca and contributors
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

node_modules/bufferutil/README.md

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+# bufferutil
+
+[![Version npm](https://img.shields.io/npm/v/bufferutil.svg?logo=npm)](https://www.npmjs.com/package/bufferutil)
+[![Linux/macOS/Windows Build](https://img.shields.io/github/actions/workflow/status/websockets/bufferutil/ci.yml?branch=master&label=build&logo=github)](https://github.com/websockets/bufferutil/actions?query=workflow%3ACI+branch%3Amaster)
+
+`bufferutil` is what makes `ws` fast. It provides some utilities to efficiently
+perform some operations such as masking and unmasking the data payload of
+WebSocket frames.
+
+## Installation
+
+```
+npm install bufferutil --save-optional
+```
+
+The `--save-optional` flag tells npm to save the package in your package.json
+under the
+[`optionalDependencies`](https://docs.npmjs.com/files/package.json#optionaldependencies)
+key.
+
+## API
+
+The module exports two functions. To maximize performance, parameters are not
+validated. It is the caller's responsibility to ensure that they are correct.
+
+### `bufferUtil.mask(source, mask, output, offset, length)`
+
+Masks a buffer using the given masking-key as specified by the WebSocket
+protocol.
+
+#### Arguments
+
+- `source` - The buffer to mask.
+- `mask` - A buffer representing the masking-key.
+- `output` - The buffer where to store the result.
+- `offset` - The offset at which to start writing.
+- `length` - The number of bytes to mask.
+
+#### Example
+
+```js
+'use strict';
+
+const bufferUtil = require('bufferutil');
+const crypto = require('crypto');
+
+const source = crypto.randomBytes(10);
+const mask = crypto.randomBytes(4);
+
+bufferUtil.mask(source, mask, source, 0, source.length);
+```
+
+### `bufferUtil.unmask(buffer, mask)`
+
+Unmasks a buffer using the given masking-key as specified by the WebSocket
+protocol.
+
+#### Arguments
+
+- `buffer` - The buffer to unmask.
+- `mask` - A buffer representing the masking-key.
+
+#### Example
+
+```js
+'use strict';
+
+const bufferUtil = require('bufferutil');
+const crypto = require('crypto');
+
+const buffer = crypto.randomBytes(10);
+const mask = crypto.randomBytes(4);
+
+bufferUtil.unmask(buffer, mask);
+```
+
+## License
+
+[MIT](LICENSE)

node_modules/bufferutil/binding.gyp

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+{
+  'variables': {
+    'openssl_fips': ''
+  },
+  'targets': [
+    {
+      'target_name': 'bufferutil',
+      'sources': ['src/bufferutil.c'],
+      'cflags': ['-std=c99'],
+      'conditions': [
+        ["OS=='mac'", {
+          'variables': {
+            'clang_version':
+              '<!(cc -v 2>&1 | perl -ne \'print $1 if /clang version ([0-9]+(\\.[0-9]+){2,})/\')'
+          },
+          'xcode_settings': {
+            'MACOSX_DEPLOYMENT_TARGET': '10.7'
+          },
+          'conditions': [
+            # Use Perl v-strings to compare versions.
+            ['clang_version and <!(perl -e \'print <(clang_version) cmp 12.0.0\')==1', {
+              'xcode_settings': {
+                'OTHER_CFLAGS': ['-arch arm64'],
+                'OTHER_LDFLAGS': ['-arch arm64']
+              }
+            }]
+          ]
+        }]
+      ]
+    }
+  ]
+}

node_modules/bufferutil/fallback.js

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+'use strict';
+
+/**
+ * Masks a buffer using the given mask.
+ *
+ * @param {Buffer} source The buffer to mask
+ * @param {Buffer} mask The mask to use
+ * @param {Buffer} output The buffer where to store the result
+ * @param {Number} offset The offset at which to start writing
+ * @param {Number} length The number of bytes to mask.
+ * @public
+ */
+const mask = (source, mask, output, offset, length) => {
+  for (var i = 0; i < length; i++) {
+    output[offset + i] = source[i] ^ mask[i & 3];
+  }
+};
+
+/**
+ * Unmasks a buffer using the given mask.
+ *
+ * @param {Buffer} buffer The buffer to unmask
+ * @param {Buffer} mask The mask to use
+ * @public
+ */
+const unmask = (buffer, mask) => {
+  // Required until https://github.com/nodejs/node/issues/9006 is resolved.
+  const length = buffer.length;
+  for (var i = 0; i < length; i++) {
+    buffer[i] ^= mask[i & 3];
+  }
+};
+
+module.exports = { mask, unmask };

node_modules/bufferutil/index.js

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+'use strict';
+
+try {
+  module.exports = require('node-gyp-build')(__dirname);
+} catch (e) {
+  module.exports = require('./fallback');
+}

node_modules/bufferutil/package.json

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+{
+  "name": "bufferutil",
+  "version": "4.0.9",
+  "description": "WebSocket buffer utils",
+  "main": "index.js",
+  "engines": {
+    "node": ">=6.14.2"
+  },
+  "scripts": {
+    "install": "node-gyp-build",
+    "prebuild": "prebuildify --napi --strip --target=8.11.2",
+    "prebuild-darwin-x64+arm64": "prebuildify --arch x64+arm64 --napi --strip --target=8.11.2",
+    "test": "mocha"
+  },
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/websockets/bufferutil"
+  },
+  "keywords": [
+    "bufferutil"
+  ],
+  "author": "Einar Otto Stangvik <einaros@gmail.com> (http://2x.io)",
+  "license": "MIT",
+  "bugs": {
+    "url": "https://github.com/websockets/bufferutil/issues"
+  },
+  "homepage": "https://github.com/websockets/bufferutil",
+  "dependencies": {
+    "node-gyp-build": "^4.3.0"
+  },
+  "devDependencies": {
+    "mocha": "^11.0.1",
+    "node-gyp": "^11.0.0",
+    "prebuildify": "^6.0.0"
+  }
+}

node_modules/bufferutil/src/bufferutil.c

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+#define NAPI_VERSION 1
+#include <assert.h>
+#include <node_api.h>
+
+napi_value Mask(napi_env env, napi_callback_info info) {
+  napi_status status;
+  size_t argc = 5;
+  napi_value argv[5];
+
+  status = napi_get_cb_info(env, info, &argc, argv, NULL, NULL);
+  assert(status == napi_ok);
+
+  uint8_t *source;
+  uint8_t *mask;
+  uint8_t *destination;
+  uint32_t offset;
+  uint32_t length;
+
+  status = napi_get_buffer_info(env, argv[0], (void **)&source, NULL);
+  assert(status == napi_ok);
+
+  status = napi_get_buffer_info(env, argv[1], (void **)&mask, NULL);
+  assert(status == napi_ok);
+
+  status = napi_get_buffer_info(env, argv[2], (void **)&destination, NULL);
+  assert(status == napi_ok);
+
+  status = napi_get_value_uint32(env, argv[3], &offset);
+  assert(status == napi_ok);
+
+  status = napi_get_value_uint32(env, argv[4], &length);
+  assert(status == napi_ok);
+
+  destination += offset;
+  uint32_t index = 0;
+
+  //
+  // Alignment preamble.
+  //
+  while (index < length && ((size_t)source % 8)) {
+    *destination++ = *source++ ^ mask[index % 4];
+    index++;
+  }
+
+  length -= index;
+  if (!length)
+    return NULL;
+
+  //
+  // Realign mask and convert to 64 bit.
+  //
+  uint8_t maskAlignedArray[8];
+
+  for (uint8_t i = 0; i < 8; i++, index++) {
+    maskAlignedArray[i] = mask[index % 4];
+  }
+
+  //
+  // Apply 64 bit mask in 8 byte chunks.
+  //
+  uint32_t loop = length / 8;
+  uint64_t *pMask8 = (uint64_t *)maskAlignedArray;
+
+  while (loop--) {
+    uint64_t *pFrom8 = (uint64_t *)source;
+    uint64_t *pTo8 = (uint64_t *)destination;
+    *pTo8 = *pFrom8 ^ *pMask8;
+    source += 8;
+    destination += 8;
+  }
+
+  //
+  // Apply mask to remaining data.
+  //
+  uint8_t *pmaskAlignedArray = maskAlignedArray;
+
+  length %= 8;
+  while (length--) {
+    *destination++ = *source++ ^ *pmaskAlignedArray++;
+  }
+
+  return NULL;
+}
+
+napi_value Unmask(napi_env env, napi_callback_info info) {
+  napi_status status;
+  size_t argc = 2;
+  napi_value argv[2];
+
+  status = napi_get_cb_info(env, info, &argc, argv, NULL, NULL);
+  assert(status == napi_ok);
+
+  uint8_t *source;
+  size_t length;
+  uint8_t *mask;
+
+  status = napi_get_buffer_info(env, argv[0], (void **)&source, &length);
+  assert(status == napi_ok);
+
+  status = napi_get_buffer_info(env, argv[1], (void **)&mask, NULL);
+  assert(status == napi_ok);
+
+  uint32_t index = 0;
+
+  //
+  // Alignment preamble.
+  //
+  while (index < length && ((size_t)source % 8)) {
+    *source++ ^= mask[index % 4];
+    index++;
+  }
+
+  length -= index;
+  if (!length)
+    return NULL;
+
+  //
+  // Realign mask and convert to 64 bit.
+  //
+  uint8_t maskAlignedArray[8];
+
+  for (uint8_t i = 0; i < 8; i++, index++) {
+    maskAlignedArray[i] = mask[index % 4];
+  }
+
+  //
+  // Apply 64 bit mask in 8 byte chunks.
+  //
+  uint32_t loop = length / 8;
+  uint64_t *pMask8 = (uint64_t *)maskAlignedArray;
+
+  while (loop--) {
+    uint64_t *pSource8 = (uint64_t *)source;
+    *pSource8 ^= *pMask8;
+    source += 8;
+  }
+
+  //
+  // Apply mask to remaining data.
+  //
+  uint8_t *pmaskAlignedArray = maskAlignedArray;
+
+  length %= 8;
+  while (length--) {
+    *source++ ^= *pmaskAlignedArray++;
+  }
+
+  return NULL;
+}
+
+napi_value Init(napi_env env, napi_value exports) {
+  napi_status status;
+  napi_value mask;
+  napi_value unmask;
+
+  status = napi_create_function(env, NULL, 0, Mask, NULL, &mask);
+  assert(status == napi_ok);
+
+  status = napi_create_function(env, NULL, 0, Unmask, NULL, &unmask);
+  assert(status == napi_ok);
+
+  status = napi_set_named_property(env, exports, "mask", mask);
+  assert(status == napi_ok);
+
+  status = napi_set_named_property(env, exports, "unmask", unmask);
+  assert(status == napi_ok);
+
+  return exports;
+}
+
+NAPI_MODULE(NODE_GYP_MODULE_NAME, Init)