openclaw/dist/base64-DHgbKH6a.js

Multi-channel AI gateway with extensible messaging integrations

//#region extensions/file-transfer/src/shared/base64.ts
function isBase64DataChar(code) {
	return code >= 65 && code <= 90 || code >= 97 && code <= 122 || code >= 48 && code <= 57 || code === 43 || code === 47 || code === 45 || code === 95;
}
/** Validates base64 structure and returns its decoded size without allocating a decode buffer. */
function inspectStrictBase64(value) {
	let dataChars = 0;
	let padding = 0;
	let sawPadding = false;
	for (let index = 0; index < value.length; index += 1) {
		const code = value.charCodeAt(index);
		if (code === 61) {
			padding += 1;
			if (padding > 2) return;
			sawPadding = true;
			continue;
		}
		if (sawPadding || !isBase64DataChar(code)) return;
		dataChars += 1;
	}
	if (dataChars === 0) return padding === 0 ? 0 : void 0;
	const remainder = dataChars % 4;
	if (padding === 0) return remainder === 1 ? void 0 : Math.floor(dataChars * 3 / 4);
	if (dataChars + padding < 4 || (dataChars + padding) % 4 !== 0) return;
	if (padding === 1 && remainder !== 3 || padding === 2 && remainder !== 2) return;
	return Math.floor(dataChars * 3 / 4);
}
//#endregion
export { inspectStrictBase64 as t };