2e4ef9b6ef
A bunch of cleanup to supress the new warnings is also done. Reviewed By: abrachet Differential Revision: https://reviews.llvm.org/D130723
84 lines
2.4 KiB
C++
84 lines
2.4 KiB
C++
//===-- Implementation of fopencookie -------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "src/stdio/fopencookie.h"
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#include "src/__support/File/file.h"
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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namespace __llvm_libc {
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namespace {
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class CookieFile : public __llvm_libc::File {
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public:
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void *cookie;
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cookie_io_functions_t ops;
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};
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size_t write_func(File *f, const void *data, size_t size) {
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auto cookie_file = reinterpret_cast<CookieFile *>(f);
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if (cookie_file->ops.write == nullptr)
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return 0;
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return cookie_file->ops.write(cookie_file->cookie,
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reinterpret_cast<const char *>(data), size);
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}
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size_t read_func(File *f, void *data, size_t size) {
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auto cookie_file = reinterpret_cast<CookieFile *>(f);
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if (cookie_file->ops.read == nullptr)
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return 0;
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return cookie_file->ops.read(cookie_file->cookie,
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reinterpret_cast<char *>(data), size);
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}
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int seek_func(File *f, long offset, int whence) {
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auto cookie_file = reinterpret_cast<CookieFile *>(f);
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if (cookie_file->ops.seek == nullptr) {
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errno = EINVAL;
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return -1;
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}
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off64_t offset64 = offset;
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return cookie_file->ops.seek(cookie_file->cookie, &offset64, whence);
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}
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int close_func(File *f) {
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auto cookie_file = reinterpret_cast<CookieFile *>(f);
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if (cookie_file->ops.close == nullptr)
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return 0;
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return cookie_file->ops.close(cookie_file->cookie);
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}
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int flush_func(File *) { return 0; }
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} // anonymous namespace
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LLVM_LIBC_FUNCTION(::FILE *, fopencookie,
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(void *cookie, const char *mode,
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cookie_io_functions_t ops)) {
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auto modeflags = File::mode_flags(mode);
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void *buffer = malloc(File::DEFAULT_BUFFER_SIZE);
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auto *file = reinterpret_cast<CookieFile *>(malloc(sizeof(CookieFile)));
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if (file == nullptr)
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return nullptr;
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File::init(file, &write_func, &read_func, &seek_func, &close_func,
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&flush_func, buffer, File::DEFAULT_BUFFER_SIZE,
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0, // Default buffering style
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true, // Owned buffer
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modeflags);
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file->cookie = cookie;
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file->ops = ops;
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return reinterpret_cast<::FILE *>(file);
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}
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} // namespace __llvm_libc
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