[file_sys] robust-er IPSwitch compiler (#3911)

this PR reworks IPS parser to be less stupid
what do i mean by this? well generally give it a bit of
love so it doesn't do a lot of unsound allocations
also simplify the logic greatly (and use memcmp() string idiom
instead of trusting the compiler so blindly...)

no this doesn't mean to uber optimize IPS to handle 999 gb/s
it's more so it doesn't outright crash with edge cases
as the previous codebase was quite spaghetty

also the major overhead is obviously the vector shenanigans
and the I/O -- but thats out of scope

Test that IPSwitch mods still properly work WITH ANY GAME
IF THERE IS ANY REGRESSION IN SOME GAME/MOD THEN
TELL ME

Signed-off-by: lizzie <lizzie@eden-emu.dev>
Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/3911
Reviewed-by: crueter <crueter@eden-emu.dev>
Reviewed-by: CamilleLaVey <camillelavey99@gmail.com>

1 files changed, 2 insertions, 9 deletions

diff --git a/src/core/file_sys/patch_manager.cpp b/src/core/file_sys/patch_manager.cpp
index 6ae4679054..ada8c44e78 100644
--- a/src/core/file_sys/patch_manager.cpp
+++ b/src/core/file_sys/patch_manager.cpp
@@ -345,8 +345,7 @@ VirtualDir PatchManager::PatchExeFS(VirtualDir exefs) const {
     return exefs;
 }
 
-std::vector<VirtualFile> PatchManager::CollectPatches(const std::vector<VirtualDir>& patch_dirs,
-                                                      const std::string& build_id) const {
+std::vector<VirtualFile> PatchManager::CollectPatches(const std::vector<VirtualDir>& patch_dirs, const std::string& build_id) const {
     const auto& disabled = Settings::values.disabled_addons[title_id];
     const auto nso_build_id = fmt::format("{:0<64}", build_id);
 
@@ -361,16 +360,11 @@ std::vector<VirtualFile> PatchManager::CollectPatches(const std::vector<VirtualD
             for (const auto& file : exefs_dir->GetFiles()) {
                 if (file->GetExtension() == "ips") {
                     auto name = file->GetName();
-
-                    const auto this_build_id =
-                        fmt::format("{:0<64}", name.substr(0, name.find('.')));
+                    const auto this_build_id = fmt::format("{:0<64}", name.substr(0, name.find('.')));
                     if (nso_build_id == this_build_id)
                         out.push_back(file);
                 } else if (file->GetExtension() == "pchtxt") {
                     IPSwitchCompiler compiler{file};
-                    if (!compiler.IsValid())
-                        continue;
-
                     const auto this_build_id = Common::HexToString(compiler.GetBuildID());
                     if (nso_build_id == this_build_id)
                         out.push_back(file);
@@ -378,7 +372,6 @@ std::vector<VirtualFile> PatchManager::CollectPatches(const std::vector<VirtualD
             }
         }
     }
-
     return out;
 }