bet-mcp

// text-polyfill.ts // Minimal encode/decode for utf-8, utf-16le, ascii, latin1, windows-1252 const WINDOWS_1252_EXTRA = { 0x80: "€", 0x82: "‚", 0x83: "ƒ", 0x84: "„", 0x85: "…", 0x86: "†", 0x87: "‡", 0x88: "ˆ", 0x89: "‰", 0x8a: "Š", 0x8b: "‹", 0x8c: "Œ", 0x8e: "Ž", 0x91: "‘", 0x92: "’", 0x93: "“", 0x94: "”", 0x95: "•", 0x96: "–", 0x97: "—", 0x98: "˜", 0x99: "™", 0x9a: "š", 0x9b: "›", 0x9c: "œ", 0x9e: "ž", 0x9f: "Ÿ", }; const WINDOWS_1252_REVERSE = {}; for (const [code, char] of Object.entries(WINDOWS_1252_EXTRA)) { WINDOWS_1252_REVERSE[char] = Number.parseInt(code); } /** * Decode text from binary data * @param bytes Binary data * @param encoding Encoding */ export function textDecode(bytes, encoding = "utf-8") { switch (encoding.toLowerCase()) { case "utf-8": case "utf8": if (typeof globalThis.TextDecoder !== "undefined") { return new globalThis.TextDecoder("utf-8").decode(bytes); } return decodeUTF8(bytes); case "utf-16le": return decodeUTF16LE(bytes); case "ascii": return decodeASCII(bytes); case "latin1": case "iso-8859-1": return decodeLatin1(bytes); case "windows-1252": return decodeWindows1252(bytes); default: throw new RangeError(`Encoding '${encoding}' not supported`); } } export function textEncode(input = "", encoding = "utf-8") { switch (encoding.toLowerCase()) { case "utf-8": case "utf8": if (typeof globalThis.TextEncoder !== "undefined") { return new globalThis.TextEncoder().encode(input); } return encodeUTF8(input); case "utf-16le": return encodeUTF16LE(input); case "ascii": return encodeASCII(input); case "latin1": case "iso-8859-1": return encodeLatin1(input); case "windows-1252": return encodeWindows1252(input); default: throw new RangeError(`Encoding '${encoding}' not supported`); } } // --- Internal helpers --- function decodeUTF8(bytes) { let out = ""; let i = 0; while (i < bytes.length) { const b1 = bytes[i++]; if (b1 < 0x80) { out += String.fromCharCode(b1); } else if (b1 < 0xe0) { const b2 = bytes[i++] & 0x3f; out += String.fromCharCode(((b1 & 0x1f) << 6) | b2); } else if (b1 < 0xf0) { const b2 = bytes[i++] & 0x3f; const b3 = bytes[i++] & 0x3f; out += String.fromCharCode(((b1 & 0x0f) << 12) | (b2 << 6) | b3); } else { const b2 = bytes[i++] & 0x3f; const b3 = bytes[i++] & 0x3f; const b4 = bytes[i++] & 0x3f; let cp = ((b1 & 0x07) << 18) | (b2 << 12) | (b3 << 6) | b4; cp -= 0x10000; out += String.fromCharCode(0xd800 + ((cp >> 10) & 0x3ff), 0xdc00 + (cp & 0x3ff)); } } return out; } function decodeUTF16LE(bytes) { let out = ""; for (let i = 0; i < bytes.length; i += 2) { out += String.fromCharCode(bytes[i] | (bytes[i + 1] << 8)); } return out; } function decodeASCII(bytes) { return String.fromCharCode(...bytes.map((b) => b & 0x7f)); } function decodeLatin1(bytes) { return String.fromCharCode(...bytes); } function decodeWindows1252(bytes) { let out = ""; for (const b of bytes) { if (b >= 0x80 && b <= 0x9f && WINDOWS_1252_EXTRA[b]) { out += WINDOWS_1252_EXTRA[b]; } else { out += String.fromCharCode(b); } } return out; } function encodeUTF8(str) { const out = []; for (let i = 0; i < str.length; i++) { const cp = str.charCodeAt(i); if (cp < 0x80) { out.push(cp); } else if (cp < 0x800) { out.push(0xc0 | (cp >> 6), 0x80 | (cp & 0x3f)); } else if (cp < 0x10000) { out.push(0xe0 | (cp >> 12), 0x80 | ((cp >> 6) & 0x3f), 0x80 | (cp & 0x3f)); } else { out.push(0xf0 | (cp >> 18), 0x80 | ((cp >> 12) & 0x3f), 0x80 | ((cp >> 6) & 0x3f), 0x80 | (cp & 0x3f)); } } return new Uint8Array(out); } function encodeUTF16LE(str) { const out = new Uint8Array(str.length * 2); for (let i = 0; i < str.length; i++) { const code = str.charCodeAt(i); out[i * 2] = code & 0xff; out[i * 2 + 1] = code >> 8; } return out; } function encodeASCII(str) { return new Uint8Array([...str].map((ch) => ch.charCodeAt(0) & 0x7f)); } function encodeLatin1(str) { return new Uint8Array([...str].map((ch) => ch.charCodeAt(0) & 0xff)); } function encodeWindows1252(str) { return new Uint8Array([...str].map((ch) => { const code = ch.charCodeAt(0); if (code <= 0xff) return code; if (WINDOWS_1252_REVERSE[ch] !== undefined) return WINDOWS_1252_REVERSE[ch]; return 0x3f; // '?' })); }