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Port yuzu-emu/yuzu#2511: "common/file_util: Minor cleanup" (#4782)

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* common/file_util: Make IOFile's WriteString take a std::string_view

We don't need to force the usage of a std::string here, and can instead
use a std::string_view, which allows writing out other forms of strings
(e.g. C-style strings) without any unnecessary heap allocations.

* common/file_util: Remove unnecessary c_str() calls

The file stream open functions have supported std::string overloads
since C++11, so we don't need to use c_str() here. Same behavior, less
code.

* common/file_util: Make ReadFileToString and WriteStringToFile consistent

Makes the parameter ordering consistent, and also makes the filename
parameter a std::string. A std::string would be constructed anyways with
the previous code, as IOFile's only constructor with a filepath is one
taking a std::string.

We can also make WriteStringToFile's string parameter utilize a
std::string_view for the string, making use of our previous changes to
IOFile.

* common/file_util: Remove duplicated documentation comments

These are already present within the header, so they don't need to be
repeated in the cpp file.

* common/file_util: Make GetCurrentDir() return a std::optional

nullptr was being returned in the error case, which, at a glance may
seem perfectly OK... until you realize that std::string has the
invariant that it may not be constructed from a null pointer. This
means that if this error case was ever hit, then the application would
most likely crash from a thrown exception in std::string's constructor.

Instead, we can change the function to return an optional value,
indicating if a failure occurred.

* common/file_util: Remove unnecessary return at end of void StripTailDirSlashes()

While we're at it, also invert the conditional into a guard clause.
This commit is contained in:
Tobias 2019-06-08 00:23:57 +02:00 • committed by GitHub
parent 49f6f11462
commit ef73de9386
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3 changed files with 24 additions and 45 deletions
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4
src/citra/config.cpp
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@ -29,12 +29,12 @@ Config::Config() {
Config::~Config() = default;
bool Config::LoadINI(const std::string& default_contents, bool retry) {
const char* location = this->sdl2_config_loc.c_str();
const std::string& location = this->sdl2_config_loc;
if (sdl2_config->ParseError() < 0) {
if (retry) {
LOG_WARNING(Config, "Failed to load {}. Creating file from defaults...", location);
FileUtil::CreateFullPath(location);
FileUtil::WriteStringToFile(true, default_contents, location);
FileUtil::WriteStringToFile(true, location, default_contents);
sdl2_config = std::make_unique<INIReader>(location); // Reopen file
return LoadINI(default_contents, false);