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LibCore: Make Core::File::open() return a Result<NNRP<File>, String>

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It was impractical to return a RefPtr<File> since that left us no way
to extract the error string. This is usually needed for the UI, so the
old static open() got basically no use.
This commit is contained in:
Andreas Kling 2020-04-21 13:29:36 +02:00
parent ba3b561a40
commit a19690170f
Notes: sideshowbarker 2024-07-19 07:25:05 +09:00 
Author: https://github.com/awesomekling
Commit: https://github.com/SerenityOS/serenity/commit/a19690170f8
3 changed files with 9 additions and 7 deletions
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4
Libraries/LibCore/File.cpp
View File

@ -33,11 +33,11 @@
namespace Core {
RefPtr<File> File::open(const String& filename, IODevice::OpenMode mode, mode_t permissions)
Result<NonnullRefPtr<File>, String> File::open(const String& filename, IODevice::OpenMode mode, mode_t permissions)
{
auto file = File::construct(filename);
if (!file->open_impl(mode, permissions))
return nullptr;
return String(file->error_string());
return file;
}

3
Libraries/LibCore/File.h
View File

@ -26,6 +26,7 @@
#pragma once
#include <AK/Result.h>
#include <AK/String.h>
#include <LibCore/IODevice.h>
@ -36,7 +37,7 @@ class File final : public IODevice {
public:
virtual ~File() override;
static RefPtr<File> open(const String& filename, IODevice::OpenMode, mode_t = 0644);
static Result<NonnullRefPtr<File>, String> open(const String& filename, IODevice::OpenMode, mode_t = 0644);
String filename() const { return m_filename; }
void set_filename(const StringView& filename) { m_filename = filename; }

9
Shell/main.cpp
View File

@ -993,12 +993,13 @@ void load_history()
void save_history()
{
auto history_file = Core::File::open(get_history_path(), Core::IODevice::WriteOnly, 0600);
if (!history_file)
auto file_or_error = Core::File::open(get_history_path(), Core::IODevice::WriteOnly, 0600);
if (file_or_error.is_error())
return;
auto& file = *file_or_error.value();
for (const auto& line : editor.history()) {
history_file->write(line);
history_file->write("\n");
file.write(line);
file.write("\n");
}
}