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[libc] Implement fileno (#85628)
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fixes: #85150
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Sh0g0-1758 authored Mar 18, 2024
1 parent f804217 commit ca04b56
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Showing 6 changed files with 66 additions and 0 deletions.
1 change: 1 addition & 0 deletions libc/config/linux/x86_64/entrypoints.txt
Original file line number Diff line number Diff line change
Expand Up @@ -208,6 +208,7 @@ set(TARGET_LIBC_ENTRYPOINTS
libc.src.stdio.sscanf
libc.src.stdio.scanf
libc.src.stdio.fscanf
libc.src.stdio.fileno

# sys/epoll.h entrypoints
libc.src.sys.epoll.epoll_wait
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10 changes: 10 additions & 0 deletions libc/src/stdio/CMakeLists.txt
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Expand Up @@ -236,6 +236,16 @@ add_entrypoint_object(
libc.src.stdio.printf_core.vfprintf_internal
)

add_stdio_entrypoint_object(
fileno
SRCS
fileno.cpp
HDRS
fileno.h
DEPENDS
libc.src.stdio.fileno
)

add_subdirectory(printf_core)
add_subdirectory(scanf_core)

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21 changes: 21 additions & 0 deletions libc/src/stdio/fileno.h
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@@ -0,0 +1,21 @@
//===-- Implementation header of fileno --------------------------*- 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
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_LIBC_SRC_STDIO_FILENO_H
#define LLVM_LIBC_SRC_STDIO_FILENO_H

#include "include/llvm-libc-types/FILE.h"

namespace LIBC_NAMESPACE {

int fileno(::FILE *f);

} // namespace LIBC_NAMESPACE

#endif // LLVM_LIBC_SRC_STDIO_FILENO_H
12 changes: 12 additions & 0 deletions libc/src/stdio/generic/CMakeLists.txt
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Expand Up @@ -70,6 +70,18 @@ add_entrypoint_object(
libc.src.__support.File.platform_file
)

add_entrypoint_object(
fileno
SRCS
fileno.cpp
HDRS
../fileno.h
DEPENDS
libc.include.stdio
libc.src.__support.File.file
libc.src.__support.File.platform_file
)

add_entrypoint_object(
fflush
SRCS
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21 changes: 21 additions & 0 deletions libc/src/stdio/generic/fileno.cpp
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@@ -0,0 +1,21 @@
//===-- Implementation of fileno
//-------------------------------------------===//
//
// 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/fileno.h"

#include "include/llvm-libc-types/FILE.h"
#include "src/__support/File/file.h"

namespace LIBC_NAMESPACE {

LLVM_LIBC_FUNCTION(int, fileno, (::FILE * stream)) {
return get_fileno(reinterpret_cast<LIBC_NAMESPACE::File *>(stream));
}

} // namespace LIBC_NAMESPACE
1 change: 1 addition & 0 deletions libc/test/src/stdio/fileop_test.cpp
Original file line number Diff line number Diff line change
Expand Up @@ -30,6 +30,7 @@ TEST(LlvmLibcFILETest, SimpleFileOperations) {
constexpr char FILENAME[] = "testdata/simple_operations.test";
::FILE *file = LIBC_NAMESPACE::fopen(FILENAME, "w");
ASSERT_FALSE(file == nullptr);
ASSERT_EQ(LIBC_NAMESPACE::fileno(file), 3);
constexpr char CONTENT[] = "1234567890987654321";
ASSERT_EQ(sizeof(CONTENT) - 1,
LIBC_NAMESPACE::fwrite(CONTENT, 1, sizeof(CONTENT) - 1, file));
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