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// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/platform_file.h"
#include <fcntl.h>
#include <errno.h>
#include "base/logging.h"
#include "base/string_util.h"
namespace base {
// TODO(erikkay): does it make sense to support PLATFORM_FILE_EXCLUSIVE_* here?
PlatformFile CreatePlatformFile(const std::wstring& name,
int flags,
bool* created) {
int open_flags = 0;
if (flags & PLATFORM_FILE_CREATE)
open_flags = O_CREAT | O_EXCL;
if (flags & PLATFORM_FILE_CREATE_ALWAYS) {
DCHECK(!open_flags);
open_flags = O_CREAT | O_TRUNC;
}
if (!open_flags && !(flags & PLATFORM_FILE_OPEN) &&
!(flags & PLATFORM_FILE_OPEN_ALWAYS)) {
NOTREACHED();
errno = ENOTSUP;
return kInvalidPlatformFileValue;
}
if (flags & PLATFORM_FILE_WRITE && flags & PLATFORM_FILE_READ) {
open_flags |= O_RDWR;
} else if (flags & PLATFORM_FILE_WRITE) {
open_flags |= O_WRONLY;
} else if (!(flags & PLATFORM_FILE_READ)) {
NOTREACHED();
}
DCHECK(O_RDONLY == 0);
int descriptor = open(WideToUTF8(name).c_str(), open_flags,
S_IRUSR | S_IWUSR);
if (flags & PLATFORM_FILE_OPEN_ALWAYS) {
if (descriptor > 0) {
if (created)
*created = false;
} else {
open_flags |= O_CREAT;
descriptor = open(WideToUTF8(name).c_str(), open_flags,
S_IRUSR | S_IWUSR);
if (created && descriptor > 0)
*created = true;
}
}
return descriptor;
}
} // namespace base
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