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SaveState: Fix rename when undo disabled.

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On Windows, for example, the rename target cannot exist.

This also fixes the screenshot rename for the undo.
This commit is contained in:
Unknown W. Brackets 2018-05-20 20:51:29 -07:00
parent 9b6dee126d
commit 037a20e7c7
1 changed files with 32 additions and 16 deletions
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48
Core/SaveState.cpp
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@ -423,6 +423,28 @@ namespace SaveState
}
}
static void DeleteIfExists(const std::string &fn) {
// Just avoiding error messages.
if (File::Exists(fn)) {
File::Delete(fn);
}
}
static void RenameIfExists(const std::string &from, const std::string &to) {
if (File::Exists(from)) {
File::Rename(from, to);
}
}
static void SwapIfExists(const std::string &from, const std::string &to) {
std::string temp = from + ".tmp";
if (File::Exists(from)) {
File::Rename(from, temp);
File::Rename(to, from);
File::Rename(temp, to);
}
}
void SaveSlot(const std::string &gameFilename, int slot, Callback callback, void *cbUserData)
{
std::string fn = GenerateSaveSlotFilename(gameFilename, slot, STATE_EXTENSION);
@ -432,11 +454,11 @@ namespace SaveState
if (!fn.empty()) {
auto renameCallback = [=](bool status, const std::string &message, void *data) {
if (status) {
if (File::Exists(fnUndo) && g_Config.bEnableStateUndo) {
File::Delete(fnUndo);
}
if (File::Exists(fn) && g_Config.bEnableStateUndo) {
File::Rename(fn, fnUndo);
if (g_Config.bEnableStateUndo) {
DeleteIfExists(fnUndo);
RenameIfExists(fn, fnUndo);
} else {
DeleteIfExists(fn);
}
File::Rename(fn + ".tmp", fn);
}
@ -445,8 +467,9 @@ namespace SaveState
}
};
// Let's also create a screenshot.
if (File::Exists(shot) && g_Config.bEnableStateUndo) {
File::Rename(shot, shotUndo);
if (g_Config.bEnableStateUndo) {
DeleteIfExists(shotUndo);
RenameIfExists(shot, shotUndo);
}
SaveScreenshot(shot, Callback(), 0);
Save(fn + ".tmp", renameCallback, cbUserData);
@ -466,15 +489,8 @@ namespace SaveState
// Do nothing if there's no undo.
if (File::Exists(fnUndo)) {
// Swap them so they can undo again to redo. Mistakes happen.
if (File::Exists(shotUndo)) {
File::Rename(shot, shot + ".tmp");
File::Rename(shotUndo, shot);
File::Rename(shot + ".tmp", shotUndo);
}
File::Rename(fn, fn + ".tmp");
File::Rename(fnUndo, fn);
File::Rename(fn + ".tmp", fnUndo);
SwapIfExists(shotUndo, shot);
SwapIfExists(fnUndo, fn);
return true;
}