================ @@ -0,0 +1,49 @@ +//===-- Implementation of fgets for baremetal -------------------*- C++ -*-===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#include "src/stdio/fgets.h" + +#include "hdr/stdio_macros.h" // for EOF. +#include "hdr/types/FILE.h" +#include "src/__support/common.h" +#include "src/__support/libc_errno.h" +#include "src/__support/macros/config.h" +#include "src/stdio/baremetal/file_internal.h" + +namespace LIBC_NAMESPACE_DECL { + +LLVM_LIBC_FUNCTION(char *, fgets, + (char *__restrict str, int count, + ::FILE *__restrict stream)) { + if (count < 1) + return nullptr; + + char c = '\0'; + // i is an int because it's frequently compared to count, which is also int. + int i = 0; + + for (; i < (count - 1) && c != '\n'; ++i) { + auto result = read_internal(&c, 1, stream); + if (result.has_error()) + libc_errno = result.error; + + if (result.value != 1) + break; ---------------- petrhosek wrote:
Depends on the how the embedder handles the end-of-file situation in their implementation of `__llvm_libc_stdio_read`, but if it returns `0` rather than a negative value signaling error (i.e. `EOF`) , then we would hit this case. https://github.com/llvm/llvm-project/pull/168931 _______________________________________________ cfe-commits mailing list [email protected] https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
