11 files changed, 107 insertions, 101 deletions

diff --git a/src/core/file_sys/nca_patch.cpp b/src/core/file_sys/nca_patch.cpp
index dd684c38e..22fbba573 100644
--- a/src/core/file_sys/nca_patch.cpp
+++ b/src/core/file_sys/nca_patch.cpp
@@ -17,7 +17,7 @@ BKTR::BKTR(VirtualFile base_romfs_, VirtualFile bktr_romfs_, RelocationBlock rel
       relocation(relocation_), relocation_buckets(std::move(relocation_buckets_)),
       subsection(subsection_), subsection_buckets(std::move(subsection_buckets_)),
       encrypted(is_encrypted_), key(key_), base_offset(base_offset_), ivfc_offset(ivfc_offset_),
-      section_ctr(std::move(section_ctr_)) {
+      section_ctr(section_ctr_) {
     for (size_t i = 0; i < relocation.number_buckets - 1; ++i) {
         relocation_buckets[i].entries.push_back({relocation.base_offsets[i + 1], 0, 0});
     }
@@ -31,6 +31,8 @@ BKTR::BKTR(VirtualFile base_romfs_, VirtualFile bktr_romfs_, RelocationBlock rel
     relocation_buckets.back().entries.push_back({relocation.size, 0, 0});
 }
 
+BKTR::~BKTR() = default;
+
 size_t BKTR::Read(u8* data, size_t length, size_t offset) const {
     // Read out of bounds.
     if (offset >= relocation.size)
@@ -41,68 +43,66 @@ size_t BKTR::Read(u8* data, size_t length, size_t offset) const {
 
     const auto next_relocation = GetNextRelocationEntry(offset);
 
-    if (offset + length <= next_relocation.address_patch) {
-        if (bktr_read) {
-            if (!encrypted) {
-                return bktr_romfs->Read(data, length, section_offset);
-            }
-
-            const auto subsection = GetSubsectionEntry(section_offset);
-            Core::Crypto::AESCipher<Core::Crypto::Key128> cipher(key, Core::Crypto::Mode::CTR);
-
-            // Calculate AES IV
-            std::vector<u8> iv(16);
-            auto subsection_ctr = subsection.ctr;
-            auto offset_iv = section_offset + base_offset;
-            for (u8 i = 0; i < 8; ++i)
-                iv[i] = section_ctr[0x8 - i - 1];
-            offset_iv >>= 4;
-            for (size_t i = 0; i < 8; ++i) {
-                iv[0xF - i] = static_cast<u8>(offset_iv & 0xFF);
-                offset_iv >>= 8;
-            }
-            for (size_t i = 0; i < 4; ++i) {
-                iv[0x7 - i] = static_cast<u8>(subsection_ctr & 0xFF);
-                subsection_ctr >>= 8;
-            }
-            cipher.SetIV(iv);
-
-            const auto next_subsection = GetNextSubsectionEntry(section_offset);
-
-            if (section_offset + length <= next_subsection.address_patch) {
-                const auto block_offset = section_offset & 0xF;
-                if (block_offset != 0) {
-                    auto block = bktr_romfs->ReadBytes(0x10, section_offset & ~0xF);
-                    cipher.Transcode(block.data(), block.size(), block.data(),
-                                     Core::Crypto::Op::Decrypt);
-                    if (length + block_offset < 0x10) {
-                        std::memcpy(data, block.data() + block_offset,
-                                    std::min(length, block.size()));
-                        return std::min(length, block.size());
-                    }
-
-                    const auto read = 0x10 - block_offset;
-                    std::memcpy(data, block.data() + block_offset, read);
-                    return read + Read(data + read, length - read, offset + read);
-                }
-
-                const auto raw_read = bktr_romfs->Read(data, length, section_offset);
-                cipher.Transcode(data, raw_read, data, Core::Crypto::Op::Decrypt);
-                return raw_read;
-            } else {
-                const u64 partition = next_subsection.address_patch - section_offset;
-                return Read(data, partition, offset) +
-                       Read(data + partition, length - partition, offset + partition);
-            }
-        } else {
-            ASSERT(section_offset > ivfc_offset, "Offset calculation negative.");
-            return base_romfs->Read(data, length, section_offset);
-        }
-    } else {
+    if (offset + length >= next_relocation.address_patch) {
         const u64 partition = next_relocation.address_patch - offset;
         return Read(data, partition, offset) +
                Read(data + partition, length - partition, offset + partition);
     }
+
+    if (!bktr_read) {
+        ASSERT_MSG(section_offset > ivfc_offset, "Offset calculation negative.");
+        return base_romfs->Read(data, length, section_offset);
+    }
+
+    if (!encrypted) {
+        return bktr_romfs->Read(data, length, section_offset);
+    }
+
+    const auto subsection = GetSubsectionEntry(section_offset);
+    Core::Crypto::AESCipher<Core::Crypto::Key128> cipher(key, Core::Crypto::Mode::CTR);
+
+    // Calculate AES IV
+    std::vector<u8> iv(16);
+    auto subsection_ctr = subsection.ctr;
+    auto offset_iv = section_offset + base_offset;
+    for (size_t i = 0; i < section_ctr.size(); ++i)
+        iv[i] = section_ctr[0x8 - i - 1];
+    offset_iv >>= 4;
+    for (size_t i = 0; i < sizeof(u64); ++i) {
+        iv[0xF - i] = static_cast<u8>(offset_iv & 0xFF);
+        offset_iv >>= 8;
+    }
+    for (size_t i = 0; i < sizeof(u32); ++i) {
+        iv[0x7 - i] = static_cast<u8>(subsection_ctr & 0xFF);
+        subsection_ctr >>= 8;
+    }
+    cipher.SetIV(iv);
+
+    const auto next_subsection = GetNextSubsectionEntry(section_offset);
+
+    if (section_offset + length > next_subsection.address_patch) {
+        const u64 partition = next_subsection.address_patch - section_offset;
+        return Read(data, partition, offset) +
+               Read(data + partition, length - partition, offset + partition);
+    }
+
+    const auto block_offset = section_offset & 0xF;
+    if (block_offset != 0) {
+        auto block = bktr_romfs->ReadBytes(0x10, section_offset & ~0xF);
+        cipher.Transcode(block.data(), block.size(), block.data(), Core::Crypto::Op::Decrypt);
+        if (length + block_offset < 0x10) {
+            std::memcpy(data, block.data() + block_offset, std::min(length, block.size()));
+            return std::min(length, block.size());
+        }
+
+        const auto read = 0x10 - block_offset;
+        std::memcpy(data, block.data() + block_offset, read);
+        return read + Read(data + read, length - read, offset + read);
+    }
+
+    const auto raw_read = bktr_romfs->Read(data, length, section_offset);
+    cipher.Transcode(data, raw_read, data, Core::Crypto::Op::Decrypt);
+    return raw_read;
 }
 
 template <bool Subsection, typename BlockType, typename BucketType>
@@ -116,11 +116,9 @@ std::pair<size_t, size_t> BKTR::SearchBucketEntry(u64 offset, BlockType block,
         ASSERT_MSG(offset <= block.size, "Offset is out of bounds in BKTR relocation block.");
     }
 
-    size_t bucket_id = 0;
-    for (size_t i = 1; i < block.number_buckets; ++i) {
-        if (block.base_offsets[i] <= offset)
-            ++bucket_id;
-    }
+    size_t bucket_id = std::count_if(block.base_offsets.begin() + 1,
+                                     block.base_offsets.begin() + block.number_buckets,
+                                     [&offset](u64 base_offset) { return base_offset < offset; });
 
     const auto bucket = buckets[bucket_id];
 
diff --git a/src/core/file_sys/nca_patch.h b/src/core/file_sys/nca_patch.h
index 8b8d0a4f5..0d9ad95f5 100644
--- a/src/core/file_sys/nca_patch.h
+++ b/src/core/file_sys/nca_patch.h
@@ -4,9 +4,11 @@
 
 #pragma once
 
+#include <array>
+#include <vector>
+#include <common/common_funcs.h>
 #include "core/crypto/key_manager.h"
 #include "core/file_sys/romfs.h"
-#include "core/loader/loader.h"
 
 namespace FileSys {
 
@@ -91,6 +93,7 @@ public:
          std::vector<RelocationBucket> relocation_buckets, SubsectionBlock subsection,
          std::vector<SubsectionBucket> subsection_buckets, bool is_encrypted,
          Core::Crypto::Key128 key, u64 base_offset, u64 ivfc_offset, std::array<u8, 8> section_ctr);
+    ~BKTR() override;
 
     size_t Read(u8* data, size_t length, size_t offset) const override;
 
diff --git a/src/core/file_sys/patch_manager.cpp b/src/core/file_sys/patch_manager.cpp
index 697b8a4c9..5e853c2c0 100644
--- a/src/core/file_sys/patch_manager.cpp
+++ b/src/core/file_sys/patch_manager.cpp
@@ -8,24 +8,19 @@
 
 namespace FileSys {
 
-union TitleVersion {
-    u32 version;
-
-    struct {
-        u8 v_revision;
-        u8 v_micro;
-        u8 v_minor;
-        u8 v_major;
-    };
-};
-
-std::string FormatTitleVersion(u32 version_, bool full) {
-    TitleVersion ver{};
-    ver.version = version_;
+constexpr u64 SINGLE_BYTE_MODULUS = 0x100;
+
+std::string FormatTitleVersion(u32 version, TitleVersionFormat format) {
+    std::array<u8, sizeof(u32)> bytes{};
+    bytes[0] = version % SINGLE_BYTE_MODULUS;
+    for (size_t i = 1; i < bytes.size(); ++i) {
+        version /= SINGLE_BYTE_MODULUS;
+        bytes[i] = version % SINGLE_BYTE_MODULUS;
+    }
 
-    if (full)
-        return fmt::format("v{}.{}.{}.{}", ver.v_major, ver.v_minor, ver.v_minor, ver.v_revision);
-    return fmt::format("v{}.{}.{}", ver.v_major, ver.v_minor, ver.v_micro);
+    if (format == TitleVersionFormat::FourElements)
+        return fmt::format("v{}.{}.{}.{}", bytes[3], bytes[2], bytes[1], bytes[0]);
+    return fmt::format("v{}.{}.{}", bytes[3], bytes[2], bytes[1]);
 }
 
 constexpr std::array<const char*, 1> PATCH_TYPE_NAMES{
@@ -49,8 +44,9 @@ VirtualDir PatchManager::PatchExeFS(VirtualDir exefs) const {
     const auto update = installed->GetEntry(update_tid, ContentRecordType::Program);
     if (update != nullptr) {
         if (update->GetStatus() == Loader::ResultStatus::ErrorMissingBKTRBaseRomFS &&
-            update->GetExeFS() != nullptr)
+            update->GetExeFS() != nullptr) {
             exefs = update->GetExeFS();
+        }
     }
 
     return exefs;
@@ -81,8 +77,9 @@ std::map<PatchType, u32> PatchManager::GetPatchVersionNames() const {
     const auto update_tid = GetUpdateTitleID(title_id);
     const auto update_version = installed->GetEntryVersion(update_tid);
     if (update_version != boost::none &&
-        installed->HasEntry(update_tid, ContentRecordType::Program))
+        installed->HasEntry(update_tid, ContentRecordType::Program)) {
         out[PatchType::Update] = update_version.get();
+    }
 
     return out;
 }
diff --git a/src/core/file_sys/patch_manager.h b/src/core/file_sys/patch_manager.h
index 2a39c473a..803bcb2a2 100644
--- a/src/core/file_sys/patch_manager.h
+++ b/src/core/file_sys/patch_manager.h
@@ -5,12 +5,19 @@
 #pragma once
 
 #include <map>
+#include <string>
 #include "common/common_types.h"
 #include "core/file_sys/vfs.h"
 
 namespace FileSys {
 
-std::string FormatTitleVersion(u32 version, bool full = false);
+enum class TitleVersionFormat : u8 {
+    ThreeElements, ///< vX.Y.Z
+    FourElements,  ///< vX.Y.Z.W
+};
+
+std::string FormatTitleVersion(u32 version,
+                               TitleVersionFormat format = TitleVersionFormat::ThreeElements);
 
 enum class PatchType {
     Update,
diff --git a/src/core/file_sys/registered_cache.cpp b/src/core/file_sys/registered_cache.cpp
index 39c0710e1..7361a67be 100644
--- a/src/core/file_sys/registered_cache.cpp
+++ b/src/core/file_sys/registered_cache.cpp
@@ -281,10 +281,14 @@ VirtualFile RegisteredCache::GetEntryUnparsed(RegisteredCacheEntry entry) const
 }
 
 boost::optional<u32> RegisteredCache::GetEntryVersion(u64 title_id) const {
-    if (meta.find(title_id) != meta.end())
-        return meta.at(title_id).GetTitleVersion();
-    if (yuzu_meta.find(title_id) != yuzu_meta.end())
-        return yuzu_meta.at(title_id).GetTitleVersion();
+    const auto meta_iter = meta.find(title_id);
+    if (meta_iter != meta.end())
+        return meta_iter->second.GetTitleVersion();
+
+    const auto yuzu_meta_iter = yuzu_meta.find(title_id);
+    if (yuzu_meta_iter != yuzu_meta.end())
+        return yuzu_meta_iter->second.GetTitleVersion();
+
     return boost::none;
 }
 
@@ -516,12 +520,9 @@ void RegisteredCacheUnion::Refresh() {
 }
 
 bool RegisteredCacheUnion::HasEntry(u64 title_id, ContentRecordType type) const {
-    for (const auto& c : caches) {
-        if (c->HasEntry(title_id, type))
-            return true;
-    }
-
-    return false;
+    return std::any_of(caches.begin(), caches.end(), [title_id, type](const auto& cache) {
+        return cache->HasEntry(title_id, type);
+    });
 }
 
 bool RegisteredCacheUnion::HasEntry(RegisteredCacheEntry entry) const {
diff --git a/src/core/file_sys/registered_cache.h b/src/core/file_sys/registered_cache.h
index dcce3fd16..f487b0cf0 100644
--- a/src/core/file_sys/registered_cache.h
+++ b/src/core/file_sys/registered_cache.h
@@ -43,7 +43,7 @@ struct RegisteredCacheEntry {
     std::string DebugInfo() const;
 };
 
-constexpr inline u64 GetUpdateTitleID(u64 base_title_id) {
+constexpr u64 GetUpdateTitleID(u64 base_title_id) {
     return base_title_id | 0x800;
 }
 
diff --git a/src/core/loader/deconstructed_rom_directory.cpp b/src/core/loader/deconstructed_rom_directory.cpp
index 6b2230269..223570431 100644
--- a/src/core/loader/deconstructed_rom_directory.cpp
+++ b/src/core/loader/deconstructed_rom_directory.cpp
@@ -189,7 +189,7 @@ ResultStatus AppLoader_DeconstructedRomDirectory::ReadTitle(std::string& title)
     return ResultStatus::Success;
 }
 
-bool AppLoader_DeconstructedRomDirectory::IsRomFSUpdatable() {
+bool AppLoader_DeconstructedRomDirectory::IsRomFSUpdatable() const {
     return false;
 }
 
diff --git a/src/core/loader/deconstructed_rom_directory.h b/src/core/loader/deconstructed_rom_directory.h
index a8644516b..8a0dc1b1e 100644
--- a/src/core/loader/deconstructed_rom_directory.h
+++ b/src/core/loader/deconstructed_rom_directory.h
@@ -44,7 +44,7 @@ public:
     ResultStatus ReadIcon(std::vector<u8>& buffer) override;
     ResultStatus ReadProgramId(u64& out_program_id) override;
     ResultStatus ReadTitle(std::string& title) override;
-    bool IsRomFSUpdatable() override;
+    bool IsRomFSUpdatable() const override;
 
 private:
     FileSys::ProgramMetadata metadata;
diff --git a/src/core/loader/loader.h b/src/core/loader/loader.h
index b4a3a6573..225c05127 100644
--- a/src/core/loader/loader.h
+++ b/src/core/loader/loader.h
@@ -210,7 +210,7 @@ public:
      * the base game it should be set to false.
      * @return bool whether or not updatable.
      */
-    virtual bool IsRomFSUpdatable() {
+    virtual bool IsRomFSUpdatable() const {
         return true;
     }
 
diff --git a/src/core/loader/nro.cpp b/src/core/loader/nro.cpp
index 96f5cd9e5..bb89a9da3 100644
--- a/src/core/loader/nro.cpp
+++ b/src/core/loader/nro.cpp
@@ -233,7 +233,7 @@ ResultStatus AppLoader_NRO::ReadTitle(std::string& title) {
     return ResultStatus::Success;
 }
 
-bool AppLoader_NRO::IsRomFSUpdatable() {
+bool AppLoader_NRO::IsRomFSUpdatable() const {
     return false;
 }
 
diff --git a/src/core/loader/nro.h b/src/core/loader/nro.h
index c35c99d14..96d2de305 100644
--- a/src/core/loader/nro.h
+++ b/src/core/loader/nro.h
@@ -39,7 +39,7 @@ public:
     ResultStatus ReadProgramId(u64& out_program_id) override;
     ResultStatus ReadRomFS(FileSys::VirtualFile& dir) override;
     ResultStatus ReadTitle(std::string& title) override;
-    bool IsRomFSUpdatable() override;
+    bool IsRomFSUpdatable() const override;
 
 private:
     bool LoadNro(FileSys::VirtualFile file, VAddr load_base);