@flex-development/pathe/dist/lib/extname.mjs

Universal drop-in replacement for node:path

import canParseURL from "#internal/can-parse-url";
import { DRIVE_PATH_REGEX } from "#internal/constants";
import validateURLString from "#internal/validate-url-string";
import delimiter from "#lib/delimiter";
import dot from "#lib/dot";
import isSep from "#lib/is-sep";
import toPosix from "#lib/to-posix";
function extname(input) {
  validateURLString(input, "input");
  input = String(toPosix(input));
  let base = 0;
  let offset = 0;
  let predot = 0;
  let separator = true;
  let start = -1;
  let end = -1;
  if (canParseURL(input)) {
    offset = base = input.lastIndexOf(new URL(input).pathname);
    if (DRIVE_PATH_REGEX.test(input.slice(offset + 1))) base = ++offset;
  }
  if (input.length >= 2 && DRIVE_PATH_REGEX.test(input.slice(offset))) {
    offset = base = input.indexOf(delimiter, offset) + 1;
  }
  for (let i = input.length - 1; i >= offset; --i) {
    const char = input[i];
    if (isSep(char)) {
      if (!separator) {
        base = i + 1;
        break;
      }
      continue;
    }
    if (end === -1) {
      end = i + 1;
      separator = false;
    }
    if (char === dot) {
      if (start === -1) start = i;
      else if (predot !== 1) predot = 1;
    } else if (start !== -1) {
      predot = -1;
    }
  }
  if (start === -1 || end === -1 || // non-dot character immediately before the dot
  predot === 0 || // right-most trimmed path component is exactly '..'
  predot === 1 && start === end - 1 && start === base + 1) {
    return "";
  }
  return input.slice(start, end);
}
var extname_default = extname;
export {
  extname_default as default
};