StringUtil: Make SplitString return by value

Simpler usage.

Source/Core/Common/NandPaths.cpp

@@ -84,8 +84,7 @@ std::string EscapeFileName(const std::string& filename)
 
 std::string EscapePath(const std::string& path)
 {
-  std::vector<std::string> split_strings;
+  const std::vector<std::string> split_strings = SplitString(path, '/');
-  SplitString(path, '/', split_strings);
 
   std::vector<std::string> escaped_split_strings;
   escaped_split_strings.reserve(split_strings.size());

Source/Core/Common/StringUtil.cpp

@@ -341,15 +341,16 @@ void BuildCompleteFilename(std::string& _CompleteFilename, const std::string& _P
   _CompleteFilename += _Filename;
 }
 
-void SplitString(const std::string& str, const char delim, std::vector<std::string>& output)
+std::vector<std::string> SplitString(const std::string& str, const char delim)
 {
   std::istringstream iss(str);
-  output.resize(1);
+  std::vector<std::string> output(1);
 
   while (std::getline(iss, *output.rbegin(), delim))
     output.push_back("");
 
   output.pop_back();
+  return output;
 }
 
 std::string JoinStrings(const std::vector<std::string>& strings, const std::string& delimiter)

Source/Core/Common/StringUtil.h

@@ -106,7 +106,7 @@ bool AsciiToHex(const std::string& _szValue, u32& result);
 
 std::string TabsToSpaces(int tab_size, const std::string& in);
 
-void SplitString(const std::string& str, char delim, std::vector<std::string>& output);
+std::vector<std::string> SplitString(const std::string& str, char delim);
 std::string JoinStrings(const std::vector<std::string>& strings, const std::string& delimiter);
 
 // "C:/Windows/winhelp.exe" to "C:/Windows/", "winhelp", ".exe"

Source/Core/Core/ActionReplay.cpp

@@ -175,8 +175,6 @@ std::vector<ARCode> LoadCodes(const IniFile& global_ini, const IniFile& local_in
         continue;
       }
 
-      std::vector<std::string> pieces;
-
       // Check if the line is a name of the code
       if (line[0] == '$')
       {
@@ -199,7 +197,7 @@ std::vector<ARCode> LoadCodes(const IniFile& global_ini, const IniFile& local_in
       }
       else
       {
-        SplitString(line, ' ', pieces);
+        std::vector<std::string> pieces = SplitString(line, ' ');
 
         // Check if the AR code is decrypted
         if (pieces.size() == 2 && pieces[0].size() == 8 && pieces[1].size() == 8)
@@ -225,7 +223,7 @@ std::vector<ARCode> LoadCodes(const IniFile& global_ini, const IniFile& local_in
         }
         else
         {
-          SplitString(line, '-', pieces);
+          pieces = SplitString(line, '-');
           if (pieces.size() == 3 && pieces[0].size() == 4 && pieces[1].size() == 4 &&
               pieces[2].size() == 5)
           {

Source/Core/Core/ConfigManager.cpp

@@ -686,10 +686,8 @@ void SConfig::LoadUSBPassthroughSettings(IniFile& ini)
   IniFile::Section* section = ini.GetOrCreateSection("USBPassthrough");
   m_usb_passthrough_devices.clear();
   std::string devices_string;
-  std::vector<std::string> pairs;
   section->Get("Devices", &devices_string, "");
-  SplitString(devices_string, ',', pairs);
+  for (const auto& pair : SplitString(devices_string, ','))
-  for (const auto& pair : pairs)
   {
     const auto index = pair.find(':');
     if (index == std::string::npos)

Source/Core/Core/IOS/USB/Bluetooth/BTReal.cpp

@@ -520,9 +520,7 @@ void BluetoothReal::LoadLinkKeys()
   const std::string& entries = SConfig::GetInstance().m_bt_passthrough_link_keys;
   if (entries.empty())
     return;
-  std::vector<std::string> pairs;
+  for (const auto& pair : SplitString(entries, ','))
-  SplitString(entries, ',', pairs);
-  for (const auto& pair : pairs)
   {
     const auto index = pair.find('=');
     if (index == std::string::npos)

Source/Core/Core/PatchEngine.cpp

@@ -86,8 +86,7 @@ void LoadPatchSection(const std::string& section, std::vector<Patch>& patches, I
           line[loc] = ':';
         }
 
-        std::vector<std::string> items;
+        const std::vector<std::string> items = SplitString(line, ':');
-        SplitString(line, ':', items);
 
         if (items.size() >= 3)
         {

Source/Core/DolphinWX/Cheats/ARCodeAddEdit.cpp

@@ -94,8 +94,8 @@ void ARCodeAddEdit::SaveCheatData(wxCommandEvent& WXUNUSED(event))
   std::vector<std::string> encrypted_lines;
 
   // Split the entered cheat into lines.
-  std::vector<std::string> input_lines;
+  const std::vector<std::string> input_lines =
-  SplitString(WxStrToStr(m_cheat_codes->GetValue()), '\n', input_lines);
+      SplitString(WxStrToStr(m_cheat_codes->GetValue()), '\n');
 
   for (size_t i = 0; i < input_lines.size(); i++)
   {
@@ -106,8 +106,7 @@ void ARCodeAddEdit::SaveCheatData(wxCommandEvent& WXUNUSED(event))
       continue;
 
     // Let's parse the current line.  Is it in encrypted or decrypted form?
-    std::vector<std::string> pieces;
+    std::vector<std::string> pieces = SplitString(line_str, ' ');
-    SplitString(line_str, ' ', pieces);
 
     if (pieces.size() == 2 && pieces[0].size() == 8 && pieces[1].size() == 8)
     {
@@ -120,7 +119,7 @@ void ARCodeAddEdit::SaveCheatData(wxCommandEvent& WXUNUSED(event))
     }
     else if (pieces.size() == 1)
     {
-      SplitString(line_str, '-', pieces);
+      pieces = SplitString(line_str, '-');
 
       if (pieces.size() == 3 && pieces[0].size() == 4 && pieces[1].size() == 4 &&
           pieces[2].size() == 5)

Source/Core/DolphinWX/Debugger/CodeView.cpp

@@ -564,8 +564,7 @@ void CCodeView::OnPaint(wxPaintEvent& event)
     // If running
     if (m_debugger->IsAlive())
     {
-      std::vector<std::string> dis;
+      std::vector<std::string> dis = SplitString(m_debugger->Disassemble(address), '\t');
-      SplitString(m_debugger->Disassemble(address), '\t', dis);
       dis.resize(2);
 
       static const size_t VALID_BRANCH_LENGTH = 10;

Source/Core/DolphinWX/FrameAui.cpp

@@ -746,7 +746,6 @@ void CFrame::DoLoadPerspective()
 void CFrame::LoadIniPerspectives()
 {
   m_perspectives.clear();
-  std::vector<std::string> VPerspectives;
   std::string _Perspectives;
 
   IniFile ini;
@@ -755,13 +754,11 @@ void CFrame::LoadIniPerspectives()
   IniFile::Section* perspectives = ini.GetOrCreateSection("Perspectives");
   perspectives->Get("Perspectives", &_Perspectives, "Perspective 1");
   perspectives->Get("Active", &m_active_perspective, 0);
-  SplitString(_Perspectives, ',', VPerspectives);
 
-  for (auto& VPerspective : VPerspectives)
+  for (auto& VPerspective : SplitString(_Perspectives, ','))
   {
     SPerspectives Tmp;
     std::string _Section, _Perspective, _Widths, _Heights;
-    std::vector<std::string> _SWidth, _SHeight;
     Tmp.name = VPerspective;
 
     // Don't save a blank perspective
@@ -783,15 +780,13 @@ void CFrame::LoadIniPerspectives()
 
     Tmp.perspective = StrToWxStr(_Perspective);
 
-    SplitString(_Widths, ',', _SWidth);
+    for (auto& Width : SplitString(_Widths, ','))
-    SplitString(_Heights, ',', _SHeight);
-    for (auto& Width : _SWidth)
     {
       int _Tmp;
       if (TryParse(Width, &_Tmp))
         Tmp.width.push_back(_Tmp);
     }
-    for (auto& Height : _SHeight)
+    for (auto& Height : SplitString(_Heights, ','))
     {
       int _Tmp;
       if (TryParse(Height, &_Tmp))

Source/Core/InputCommon/ControllerInterface/Pipes/Pipes.cpp

@@ -136,8 +136,7 @@ void PipeDevice::SetAxis(const std::string& entry, double value)
 
 void PipeDevice::ParseCommand(const std::string& command)
 {
-  std::vector<std::string> tokens;
+  const std::vector<std::string> tokens = SplitString(command, ' ');
-  SplitString(command, ' ', tokens);
   if (tokens.size() < 2 || tokens.size() > 4)
     return;
   if (tokens[0] == "PRESS" || tokens[0] == "RELEASE")