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FileUtil: Add a class for Exists/IsDirectory/GetSize

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Some code was calling more than one of these functions in a row
(in particular, FileUtil.cpp itself did it a lot...), which is
a waste since it's possible to call stat a single time and then
read all three values from the stat struct. This commit adds a
File::FileInfo class that calls stat once on construction and
then lets Exists/IsDirectory/GetSize be executed very quickly.

The performance improvement mostly matters for functions that
can be handling a lot of files, such as File::ScanDirectoryTree.

I've also done some cleanup in code that uses these functions.
For instance, some code had checks like !Exists() || !IsDirectory(),
which is functionally equivalent to !IsDirectory(), and some
code was using File::GetSize even though there was an IOFile
object that the code could call GetSize on.
This commit is contained in:
JosJuice
2017-06-29 11:20:38 +02:00
parent e14a82a87e
commit 5ca3aee00a
21 changed files with 175 additions and 177 deletions
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17
Source/Core/DolphinWX/Config/GameCubeConfigPane.cpp
View File

@ -359,18 +359,15 @@ void GameCubeConfigPane::ChooseSlotPath(bool is_slot_a, ExpansionInterface::TEXI
if (!filename.empty())
{
if (File::Exists(filename))
if (memcard && File::Exists(filename))
{
if (memcard)
GCMemcard memorycard(filename);
if (!memorycard.IsValid())
{
GCMemcard memorycard(filename);
if (!memorycard.IsValid())
{
WxUtils::ShowErrorDialog(wxString::Format(_("Cannot use that file as a memory card.\n%s\n"
"is not a valid GameCube memory card file"),
filename.c_str()));
return;
}
WxUtils::ShowErrorDialog(wxString::Format(_("Cannot use that file as a memory card.\n%s\n"
"is not a valid GameCube memory card file"),
filename.c_str()));
return;
}
}