summaryrefslogtreecommitdiffstats
path: root/src/core/file_sys/content_archive.cpp
diff options
context:
space:
mode:
authorZach Hilman <DarkLordZach@users.noreply.github.com>2018-07-19 03:07:11 +0200
committerbunnei <bunneidev@gmail.com>2018-07-19 03:07:11 +0200
commit29aff8d5ab46c8d0199aa4bfa7eeff5d4fa2d7ef (patch)
tree3202e2ce55ab6387a4ca366a509eccdd963434c3 /src/core/file_sys/content_archive.cpp
parentMerge pull request #683 from DarkLordZach/touch (diff)
downloadyuzu-29aff8d5ab46c8d0199aa4bfa7eeff5d4fa2d7ef.tar
yuzu-29aff8d5ab46c8d0199aa4bfa7eeff5d4fa2d7ef.tar.gz
yuzu-29aff8d5ab46c8d0199aa4bfa7eeff5d4fa2d7ef.tar.bz2
yuzu-29aff8d5ab46c8d0199aa4bfa7eeff5d4fa2d7ef.tar.lz
yuzu-29aff8d5ab46c8d0199aa4bfa7eeff5d4fa2d7ef.tar.xz
yuzu-29aff8d5ab46c8d0199aa4bfa7eeff5d4fa2d7ef.tar.zst
yuzu-29aff8d5ab46c8d0199aa4bfa7eeff5d4fa2d7ef.zip
Diffstat (limited to 'src/core/file_sys/content_archive.cpp')
-rw-r--r--src/core/file_sys/content_archive.cpp167
1 files changed, 167 insertions, 0 deletions
diff --git a/src/core/file_sys/content_archive.cpp b/src/core/file_sys/content_archive.cpp
new file mode 100644
index 000000000..6cfef774d
--- /dev/null
+++ b/src/core/file_sys/content_archive.cpp
@@ -0,0 +1,167 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "common/logging/log.h"
+#include "core/file_sys/content_archive.h"
+#include "core/file_sys/vfs_offset.h"
+#include "core/loader/loader.h"
+
+namespace FileSys {
+
+// Media offsets in headers are stored divided by 512. Mult. by this to get real offset.
+constexpr u64 MEDIA_OFFSET_MULTIPLIER = 0x200;
+
+constexpr u64 SECTION_HEADER_SIZE = 0x200;
+constexpr u64 SECTION_HEADER_OFFSET = 0x400;
+
+constexpr u32 IVFC_MAX_LEVEL = 6;
+
+enum class NCASectionFilesystemType : u8 {
+ PFS0 = 0x2,
+ ROMFS = 0x3,
+};
+
+struct NCASectionHeaderBlock {
+ INSERT_PADDING_BYTES(3);
+ NCASectionFilesystemType filesystem_type;
+ u8 crypto_type;
+ INSERT_PADDING_BYTES(3);
+};
+static_assert(sizeof(NCASectionHeaderBlock) == 0x8, "NCASectionHeaderBlock has incorrect size.");
+
+struct PFS0Superblock {
+ NCASectionHeaderBlock header_block;
+ std::array<u8, 0x20> hash;
+ u32_le size;
+ INSERT_PADDING_BYTES(4);
+ u64_le hash_table_offset;
+ u64_le hash_table_size;
+ u64_le pfs0_header_offset;
+ u64_le pfs0_size;
+ INSERT_PADDING_BYTES(432);
+};
+static_assert(sizeof(PFS0Superblock) == 0x200, "PFS0Superblock has incorrect size.");
+
+struct IVFCLevel {
+ u64_le offset;
+ u64_le size;
+ u32_le block_size;
+ u32_le reserved;
+};
+static_assert(sizeof(IVFCLevel) == 0x18, "IVFCLevel has incorrect size.");
+
+struct RomFSSuperblock {
+ NCASectionHeaderBlock header_block;
+ u32_le magic;
+ u32_le magic_number;
+ INSERT_PADDING_BYTES(8);
+ std::array<IVFCLevel, 6> levels;
+ INSERT_PADDING_BYTES(64);
+};
+static_assert(sizeof(RomFSSuperblock) == 0xE8, "RomFSSuperblock has incorrect size.");
+
+NCA::NCA(VirtualFile file_) : file(file_) {
+ if (sizeof(NCAHeader) != file->ReadObject(&header))
+ LOG_CRITICAL(Loader, "File reader errored out during header read.");
+
+ if (!IsValidNCA(header)) {
+ status = Loader::ResultStatus::ErrorInvalidFormat;
+ return;
+ }
+
+ std::ptrdiff_t number_sections =
+ std::count_if(std::begin(header.section_tables), std::end(header.section_tables),
+ [](NCASectionTableEntry entry) { return entry.media_offset > 0; });
+
+ for (std::ptrdiff_t i = 0; i < number_sections; ++i) {
+ // Seek to beginning of this section.
+ NCASectionHeaderBlock block{};
+ if (sizeof(NCASectionHeaderBlock) !=
+ file->ReadObject(&block, SECTION_HEADER_OFFSET + i * SECTION_HEADER_SIZE))
+ LOG_CRITICAL(Loader, "File reader errored out during header read.");
+
+ if (block.filesystem_type == NCASectionFilesystemType::ROMFS) {
+ RomFSSuperblock sb{};
+ if (sizeof(RomFSSuperblock) !=
+ file->ReadObject(&sb, SECTION_HEADER_OFFSET + i * SECTION_HEADER_SIZE))
+ LOG_CRITICAL(Loader, "File reader errored out during header read.");
+
+ const size_t romfs_offset =
+ header.section_tables[i].media_offset * MEDIA_OFFSET_MULTIPLIER +
+ sb.levels[IVFC_MAX_LEVEL - 1].offset;
+ const size_t romfs_size = sb.levels[IVFC_MAX_LEVEL - 1].size;
+ files.emplace_back(std::make_shared<OffsetVfsFile>(file, romfs_size, romfs_offset));
+ romfs = files.back();
+ } else if (block.filesystem_type == NCASectionFilesystemType::PFS0) {
+ PFS0Superblock sb{};
+ // Seek back to beginning of this section.
+ if (sizeof(PFS0Superblock) !=
+ file->ReadObject(&sb, SECTION_HEADER_OFFSET + i * SECTION_HEADER_SIZE))
+ LOG_CRITICAL(Loader, "File reader errored out during header read.");
+
+ u64 offset = (static_cast<u64>(header.section_tables[i].media_offset) *
+ MEDIA_OFFSET_MULTIPLIER) +
+ sb.pfs0_header_offset;
+ u64 size = MEDIA_OFFSET_MULTIPLIER * (header.section_tables[i].media_end_offset -
+ header.section_tables[i].media_offset);
+ auto npfs = std::make_shared<PartitionFilesystem>(
+ std::make_shared<OffsetVfsFile>(file, size, offset));
+
+ if (npfs->GetStatus() == Loader::ResultStatus::Success) {
+ dirs.emplace_back(npfs);
+ if (IsDirectoryExeFS(dirs.back()))
+ exefs = dirs.back();
+ }
+ }
+ }
+
+ status = Loader::ResultStatus::Success;
+}
+
+Loader::ResultStatus NCA::GetStatus() const {
+ return status;
+}
+
+std::vector<std::shared_ptr<VfsFile>> NCA::GetFiles() const {
+ if (status != Loader::ResultStatus::Success)
+ return {};
+ return files;
+}
+
+std::vector<std::shared_ptr<VfsDirectory>> NCA::GetSubdirectories() const {
+ if (status != Loader::ResultStatus::Success)
+ return {};
+ return dirs;
+}
+
+std::string NCA::GetName() const {
+ return file->GetName();
+}
+
+std::shared_ptr<VfsDirectory> NCA::GetParentDirectory() const {
+ return file->GetContainingDirectory();
+}
+
+NCAContentType NCA::GetType() const {
+ return header.content_type;
+}
+
+u64 NCA::GetTitleId() const {
+ if (status != Loader::ResultStatus::Success)
+ return {};
+ return header.title_id;
+}
+
+VirtualFile NCA::GetRomFS() const {
+ return romfs;
+}
+
+VirtualDir NCA::GetExeFS() const {
+ return exefs;
+}
+
+bool NCA::ReplaceFileWithSubdirectory(VirtualFile file, VirtualDir dir) {
+ return false;
+}
+} // namespace FileSys