@samchon/openapi/src/functional/_isFormatIpv4.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 _isFormatIpv4 = (str: string): boolean => PATTERN.test(str);

const PATTERN =
  /^(?:(?:25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)\.){3}(?:25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)$/;