@samchon/openapi/src/functional/_isFormatByte.ts

Universal OpenAPI to LLM function calling schemas. Transform any Swagger/OpenAPI document into type-safe schemas for OpenAI, Claude, Qwen, and more.

export const _isFormatByte = (str: string): boolean => {
  PATTERN.lastIndex = 0;
  return PATTERN.test(str);
};

const PATTERN =
  /^(?:[A-Za-z0-9+/]{4})*(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=)?$/gm;