33 lines · cpp
1//===-- Implementation of ungetc ------------------------------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9#include "src/stdio/ungetc.h"10 11#include "file.h"12#include "hdr/types/FILE.h"13#include "src/__support/common.h"14 15namespace LIBC_NAMESPACE_DECL {16 17LLVM_LIBC_FUNCTION(int, ungetc, (int c, ::FILE *stream)) {18 int ret;19 rpc::Client::Port port = rpc::client.open<LIBC_UNGETC>();20 port.send_and_recv(21 [=](rpc::Buffer *buffer, uint32_t) {22 buffer->data[0] = c;23 buffer->data[1] = file::from_stream(stream);24 },25 [&](rpc::Buffer *buffer, uint32_t) {26 ret = static_cast<int>(buffer->data[0]);27 });28 port.close();29 return ret;30}31 32} // namespace LIBC_NAMESPACE_DECL33