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NANDImporter: Reduce recursion in `ProcessEntry` 

It also simplifies the code flow, as it no longer goes backwards
through the filesystem chain.
This commit is contained in:
Starsam80 2021-12-29 17:49:16 -07:00
parent 2ccd974471
commit 6758c77c39
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GPG Key ID: 4E48BB48BA7E9026
2 changed files with 22 additions and 28 deletions
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46
Source/Core/DiscIO/NANDImporter.cpp
View File

@ -129,44 +129,38 @@ std::string NANDImporter::GetPath(const NANDFSTEntry& entry, const std::string&
void NANDImporter::ProcessEntry(u16 entry_number, const std::string& parent_path)
{
NANDFSTEntry entry;
memcpy(&entry, &m_nand[m_nand_fst_offset + sizeof(NANDFSTEntry) * entry_number],
sizeof(NANDFSTEntry));
while (entry_number != 0xffff)
{
memcpy(&entry, &m_nand[m_nand_fst_offset + sizeof(NANDFSTEntry) * entry_number],
sizeof(NANDFSTEntry));
if (entry.sib != 0xffff)
ProcessEntry(entry.sib, parent_path);
const std::string path = GetPath(entry, parent_path);
INFO_LOG_FMT(DISCIO, "Entry: {} Path: {}", entry, path);
m_update_callback();
Type type = static_cast<Type>(entry.mode & 3);
if (type == Type::File)
ProcessFile(entry, parent_path);
else if (type == Type::Directory)
ProcessDirectory(entry, parent_path);
else
ERROR_LOG_FMT(DISCIO, "Ignoring unknown entry type for {}", entry);
Type type = static_cast<Type>(entry.mode & 3);
if (type == Type::File)
ProcessFile(entry, path);
else if (type == Type::Directory)
ProcessDirectory(entry, path);
else
ERROR_LOG_FMT(DISCIO, "Ignoring unknown entry type for {}", entry);
entry_number = entry.sib;
}
}
void NANDImporter::ProcessDirectory(const NANDFSTEntry& entry, const std::string& parent_path)
void NANDImporter::ProcessDirectory(const NANDFSTEntry& entry, const std::string& path)
{
m_update_callback();
INFO_LOG_FMT(DISCIO, "Path: {}", FormatDebugString(entry));
const std::string path = GetPath(entry, parent_path);
File::CreateDir(m_nand_root + path);
if (entry.sub != 0xffff)
ProcessEntry(entry.sub, path);
INFO_LOG_FMT(DISCIO, "Path: {}", parent_path);
ProcessEntry(entry.sub, path);
}
void NANDImporter::ProcessFile(const NANDFSTEntry& entry, const std::string& parent_path)
void NANDImporter::ProcessFile(const NANDFSTEntry& entry, const std::string& path)
{
constexpr size_t NAND_AES_KEY_OFFSET = 0x158;
constexpr size_t NAND_FAT_BLOCK_SIZE = 0x4000;
m_update_callback();
INFO_LOG_FMT(DISCIO, "File: {}", FormatDebugString(entry));
const std::string path = GetPath(entry, parent_path);
File::IOFile file(m_nand_root + path, "wb");
std::array<u8, 16> key{};
std::copy(&m_nand_keys[NAND_AES_KEY_OFFSET], &m_nand_keys[NAND_AES_KEY_OFFSET + key.size()],

4
Source/Core/DiscIO/NANDImporter.h
View File

@ -55,8 +55,8 @@ private:
std::string GetPath(const NANDFSTEntry& entry, const std::string& parent_path);
std::string FormatDebugString(const NANDFSTEntry& entry);
void ProcessEntry(u16 entry_number, const std::string& parent_path);
void ProcessFile(const NANDFSTEntry& entry, const std::string& parent_path);
void ProcessDirectory(const NANDFSTEntry& entry, const std::string& parent_path);
void ProcessFile(const NANDFSTEntry& entry, const std::string& path);
void ProcessDirectory(const NANDFSTEntry& entry, const std::string& path);
void ExportKeys();
std::string m_nand_root;