Method isEndstreamAt

src/parser/indirect-object-parser.ts:206–232

* Check whether the "endstream" keyword appears at the given position, * allowing optional whitespace before it.

(pos: number)

   * allowing optional whitespace before it.
   */
  private isEndstreamAt(pos: number): boolean {
    const bytes = this.scanner.bytes;

    if (pos > bytes.length) {
      return false;
    }

    let i = pos;

    while (i < bytes.length && isWhitespace(bytes[i])) {
      i++;
    }

    const keyword = "endstream";

    if (i + keyword.length > bytes.length) {
      return false;
    }

    for (let j = 0; j < keyword.length; j++) {
      if (bytes[i + j] !== keyword.charCodeAt(j)) {
        return false;
      }
    }

    return true;
  }

  /**
   * Expect and consume a keyword at current scanner position.