diff options
Diffstat (limited to 'vanilla/node_modules/@exodus/bytes/fallback/encoding.api.js')
| -rw-r--r-- | vanilla/node_modules/@exodus/bytes/fallback/encoding.api.js | 38 |
1 files changed, 0 insertions, 38 deletions
diff --git a/vanilla/node_modules/@exodus/bytes/fallback/encoding.api.js b/vanilla/node_modules/@exodus/bytes/fallback/encoding.api.js deleted file mode 100644 index 8dc5243..0000000 --- a/vanilla/node_modules/@exodus/bytes/fallback/encoding.api.js +++ /dev/null @@ -1,38 +0,0 @@ -// TODO: make this more strict against Symbol.toStringTag -// Is not very significant though, anything faking Symbol.toStringTag could as well override -// prototypes, which is not something we protect against - -function isAnyArrayBuffer(x) { - if (x instanceof ArrayBuffer) return true - if (globalThis.SharedArrayBuffer && x instanceof SharedArrayBuffer) return true - if (!x || typeof x.byteLength !== 'number') return false - const s = Object.prototype.toString.call(x) - return s === '[object ArrayBuffer]' || s === '[object SharedArrayBuffer]' -} - -export function fromSource(x) { - if (x instanceof Uint8Array) return x - if (ArrayBuffer.isView(x)) return new Uint8Array(x.buffer, x.byteOffset, x.byteLength) - if (isAnyArrayBuffer(x)) { - if ('detached' in x) return x.detached === true ? new Uint8Array() : new Uint8Array(x) - // Old engines without .detached, try-catch - try { - return new Uint8Array(x) - } catch { - return new Uint8Array() - } - } - - throw new TypeError('Argument must be a SharedArrayBuffer, ArrayBuffer or ArrayBufferView') -} - -// Warning: unlike whatwg-encoding, returns lowercased labels -// Those are case-insensitive and that's how TextDecoder encoding getter normalizes them -export function getBOMEncoding(input) { - const u8 = fromSource(input) // asserts - if (u8.length >= 3 && u8[0] === 0xef && u8[1] === 0xbb && u8[2] === 0xbf) return 'utf-8' - if (u8.length < 2) return null - if (u8[0] === 0xff && u8[1] === 0xfe) return 'utf-16le' - if (u8[0] === 0xfe && u8[1] === 0xff) return 'utf-16be' - return null -} |
