summaryrefslogblamecommitdiffstats
path: root/src/core/file_sys/nca_metadata.cpp
blob: 9e855c50d159e0e5531a53457112ca7db749a763 (plain) (tree)
1
2
3
4
5
6
7
8
9

                                                               
 
                  
                                
                               
                        
                                       
                                  


                   

                                                        


                                                            


                                                                                          


         
                                                             

                                                                                    
                                                                                        



                                                             
                                                          

                                                                                 
                                                                                     




                                                       



                                                                                              
 

                        



                                           
                              
                           


                                   
                                


                                 
                       












                                                                   



                                                                                               

                                              
                                            




                                                
                                                                                                




                                                                                            
                                         






                                         

                                                                               



                                                                                                   




                                                                                     

     
                                        
 
                                             




                                                                                      






                                                                                   
// SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later

#include <cstring>
#include "common/common_types.h"
#include "common/logging/log.h"
#include "common/swap.h"
#include "core/file_sys/nca_metadata.h"
#include "core/file_sys/vfs/vfs.h"

namespace FileSys {

CNMT::CNMT(VirtualFile file) {
    if (file->ReadObject(&header) != sizeof(CNMTHeader))
        return;

    // If type is {Application, Update, AOC} has opt-header.
    if (header.type >= TitleType::Application && header.type <= TitleType::AOC) {
        if (file->ReadObject(&opt_header, sizeof(CNMTHeader)) != sizeof(OptionalHeader)) {
            LOG_WARNING(Loader, "Failed to read optional header.");
        }
    }

    for (u16 i = 0; i < header.number_content_entries; ++i) {
        auto& next = content_records.emplace_back(ContentRecord{});
        if (file->ReadObject(&next, sizeof(CNMTHeader) + i * sizeof(ContentRecord) +
                                        header.table_offset) != sizeof(ContentRecord)) {
            content_records.erase(content_records.end() - 1);
        }
    }

    for (u16 i = 0; i < header.number_meta_entries; ++i) {
        auto& next = meta_records.emplace_back(MetaRecord{});
        if (file->ReadObject(&next, sizeof(CNMTHeader) + i * sizeof(MetaRecord) +
                                        header.table_offset) != sizeof(MetaRecord)) {
            meta_records.erase(meta_records.end() - 1);
        }
    }
}

CNMT::CNMT(CNMTHeader header_, OptionalHeader opt_header_,
           std::vector<ContentRecord> content_records_, std::vector<MetaRecord> meta_records_)
    : header(std::move(header_)), opt_header(std::move(opt_header_)),
      content_records(std::move(content_records_)), meta_records(std::move(meta_records_)) {}

CNMT::~CNMT() = default;

const CNMTHeader& CNMT::GetHeader() const {
    return header;
}

u64 CNMT::GetTitleID() const {
    return header.title_id;
}

u32 CNMT::GetTitleVersion() const {
    return header.title_version;
}

TitleType CNMT::GetType() const {
    return header.type;
}

const std::vector<ContentRecord>& CNMT::GetContentRecords() const {
    return content_records;
}

const std::vector<MetaRecord>& CNMT::GetMetaRecords() const {
    return meta_records;
}

bool CNMT::UnionRecords(const CNMT& other) {
    bool change = false;
    for (const auto& rec : other.content_records) {
        const auto iter = std::find_if(content_records.begin(), content_records.end(),
                                       [&rec](const ContentRecord& r) {
                                           return r.nca_id == rec.nca_id && r.type == rec.type;
                                       });
        if (iter == content_records.end()) {
            content_records.emplace_back(rec);
            ++header.number_content_entries;
            change = true;
        }
    }
    for (const auto& rec : other.meta_records) {
        const auto iter =
            std::find_if(meta_records.begin(), meta_records.end(), [&rec](const MetaRecord& r) {
                return r.title_id == rec.title_id && r.title_version == rec.title_version &&
                       r.type == rec.type;
            });
        if (iter == meta_records.end()) {
            meta_records.emplace_back(rec);
            ++header.number_meta_entries;
            change = true;
        }
    }
    return change;
}

std::vector<u8> CNMT::Serialize() const {
    const bool has_opt_header =
        header.type >= TitleType::Application && header.type <= TitleType::AOC;
    const auto dead_zone = header.table_offset + sizeof(CNMTHeader);
    std::vector<u8> out(
        std::max(sizeof(CNMTHeader) + (has_opt_header ? sizeof(OptionalHeader) : 0), dead_zone) +
        content_records.size() * sizeof(ContentRecord) + meta_records.size() * sizeof(MetaRecord));
    memcpy(out.data(), &header, sizeof(CNMTHeader));

    // Optional Header
    if (has_opt_header) {
        memcpy(out.data() + sizeof(CNMTHeader), &opt_header, sizeof(OptionalHeader));
    }

    u64_le offset = header.table_offset;

    for (const auto& rec : content_records) {
        memcpy(out.data() + offset + sizeof(CNMTHeader), &rec, sizeof(ContentRecord));
        offset += sizeof(ContentRecord);
    }

    for (const auto& rec : meta_records) {
        memcpy(out.data() + offset + sizeof(CNMTHeader), &rec, sizeof(MetaRecord));
        offset += sizeof(MetaRecord);
    }

    return out;
}
} // namespace FileSys