DiscIO: Add GetRegion function and Region enum

Instead of needing different switch cases for
converting countries to regions in multiple places,
we now only need a single country-to-region switch case
(in DiscIO/Enums.cpp), and we get a nice Region type.

1 files changed, 44 insertions, 0 deletions

diff --git a/Source/Core/DiscIO/Enums.cpp b/Source/Core/DiscIO/Enums.cpp
index 385fff1317..6689470f32 100644
--- a/Source/Core/DiscIO/Enums.cpp
+++ b/Source/Core/DiscIO/Enums.cpp
@@ -13,6 +13,50 @@ namespace DiscIO
 {
 // Increment CACHE_REVISION (ISOFile.cpp & GameFile.cpp) if the code below is modified
 
+Region RegionSwitchGC(u8 country_code)
+{
+  Region region = RegionSwitchWii(country_code);
+  return region == Region::NTSC_K ? Region::UNKNOWN_REGION : region;
+}
+
+Region RegionSwitchWii(u8 country_code)
+{
+  switch (country_code)
+  {
+  case 'J':
+  case 'W':
+    return Region::NTSC_J;
+
+  case 'B':
+  case 'E':
+  case 'N':
+  case 'Z':
+    return Region::NTSC_U;
+
+  case 'D':
+  case 'F':
+  case 'H':
+  case 'I':
+  case 'L':
+  case 'M':
+  case 'P':
+  case 'R':
+  case 'S':
+  case 'U':
+  case 'X':
+  case 'Y':
+    return Region::PAL;
+
+  case 'K':
+  case 'Q':
+  case 'T':
+    return Region::NTSC_K;
+
+  default:
+    return Region::UNKNOWN_REGION;
+  }
+}
+
 Country CountrySwitch(u8 country_code)
 {
   switch (country_code)