From 45efb02d27304f385048a4fbc13251be827b3c1d Mon Sep 17 00:00:00 2001
From: Maschell <Maschell@gmx.de>
Date: Wed, 8 May 2024 11:14:59 +0200
Subject: [PATCH] Make sure all path checks are case-insensitive

---
 src/FSWrapper.cpp                    |  7 ++++---
 src/FSWrapperMergeDirsWithParent.cpp |  3 ++-
 src/utils/StringTools.h              | 12 +++++++++++-
 3 files changed, 17 insertions(+), 5 deletions(-)

diff --git a/src/FSWrapper.cpp b/src/FSWrapper.cpp
index e4b17a5..5a151c1 100644
--- a/src/FSWrapper.cpp
+++ b/src/FSWrapper.cpp
@@ -83,7 +83,7 @@ FSError FSWrapper::FSReadDirWrapper(FSDirectoryHandle handle, FSDirectoryEntry *
         struct dirent *entry_ = readdir(dir);
 
         if (entry_) {
-            if (SkipDeletedFilesInReadDir() && std::string_view(entry_->d_name).starts_with(deletePrefix)) {
+            if (SkipDeletedFilesInReadDir() && starts_with_case_insensitive(entry_->d_name, deletePrefix)) {
                 DEBUG_FUNCTION_LINE_ERR("Skip file file name %s because of the prefix", entry_->d_name);
                 continue;
             }
@@ -317,7 +317,7 @@ FSError FSWrapper::FSCloseFileWrapper(FSFileHandle handle) {
 bool FSWrapper::CheckFileShouldBeIgnored(std::string &path) {
     auto asPath = std::filesystem::path(path);
 
-    if (std::string(asPath.filename().c_str()).starts_with(deletePrefix)) {
+    if (starts_with_case_insensitive(asPath.filename().c_str(), deletePrefix)) {
         DEBUG_FUNCTION_LINE_VERBOSE("[%s] Ignore %s, filename starts with %s", getName().c_str(), path.c_str(), deletePrefix.c_str());
         return true;
     }
@@ -673,8 +673,9 @@ bool FSWrapper::IsFileModeAllowed(const char *mode) {
     return false;
 }
 
+
 bool FSWrapper::IsPathToReplace(const std::string_view &path) {
-    return path.starts_with(pPathToReplace);
+    return starts_with_case_insensitive(path, pPathToReplace);
 }
 
 std::string FSWrapper::GetNewPath(const std::string_view &path) {
diff --git a/src/FSWrapperMergeDirsWithParent.cpp b/src/FSWrapperMergeDirsWithParent.cpp
index b781956..df82c5b 100644
--- a/src/FSWrapperMergeDirsWithParent.cpp
+++ b/src/FSWrapperMergeDirsWithParent.cpp
@@ -1,4 +1,5 @@
 #include "FSWrapperMergeDirsWithParent.h"
+#include "utils/StringTools.h"
 #include "utils/logger.h"
 #include "utils/utils.h"
 #include <coreinit/cache.h>
@@ -83,7 +84,7 @@ FSError FSWrapperMergeDirsWithParent::FSReadDirWrapper(FSADirectoryHandle handle
                 /**
                  * Read the next entry if this entry starts with deletePrefix. We keep the entry but mark it as deleted.
                  */
-                if (std::string_view(entry->name).starts_with(deletePrefix)) {
+                if (starts_with_case_insensitive(entry->name, deletePrefix)) {
                     dirHandle->readResult[dirHandle->readResultNumberOfEntries].isMarkedAsDeleted = true;
 
                     OSMemoryBarrier();
diff --git a/src/utils/StringTools.h b/src/utils/StringTools.h
index e825367..78ec91a 100644
--- a/src/utils/StringTools.h
+++ b/src/utils/StringTools.h
@@ -11,4 +11,14 @@ std::string string_format(const std::string &format, Args... args) {
     auto buf   = std::make_unique<char[]>(size);
     std::snprintf(buf.get(), size, format.c_str(), args...);
     return std::string(buf.get(), buf.get() + size - 1); // We don't want the '\0' inside
-}
\ No newline at end of file
+}
+
+static inline bool starts_with_case_insensitive(std::string_view str, std::string_view prefix) {
+    if (str.size() < prefix.size())
+        return false;
+
+    return std::equal(prefix.begin(), prefix.end(), str.begin(),
+                      [](char a, char b) {
+                          return std::tolower(a) == std::tolower(b);
+                      });
+}