Function parseBinary

http/unstable_structured_fields.ts:953–990

(state: ParserState)

}

function parseBinary(state: ParserState): BareItem {
  if (consume(state) !== ":") {
    throw new SyntaxError(
      `Invalid structured field: expected ':' at position ${state.pos - 1}`,
    );
  }

  const { input } = state;
  const startPos = state.pos;

  // Find the closing colon while validating base64 characters
  while (state.pos < input.length && input[state.pos] !== ":") {
    if (!isBase64Char(input[state.pos]!)) {
      throw new SyntaxError(
        `Invalid structured field: invalid base64 character at position ${state.pos}`,
      );
    }
    state.pos++;
  }

  if (state.pos >= input.length) {
    throw new SyntaxError(
      "Invalid structured field: unterminated binary",
    );
  }

  const base64 = input.slice(startPos, state.pos);
  state.pos++; // consume closing ':'

  try {
    const value = decodeBase64(base64);
    return { type: "binary", value };
  } catch {
    throw new SyntaxError(
      "Invalid structured field: invalid base64 encoding",
    );
  }
}

function parseBoolean(state: ParserState): BareItem {
  if (consume(state) !== "?") {