lots of Wii disc parsing in place

NODLib.pro

@@ -7,6 +7,7 @@ QT =
 INCLUDEPATH += include
 
 HEADERS += \
+    include/Util.hpp \
     include/NODLib.hpp \
     include/IDiscIO.hpp \
     include/IFileIO.hpp \
@@ -16,11 +17,11 @@ HEADERS += \
 
 SOURCES += \
     lib/NODLib.cpp \
-    lib/DiscIOFILE.cpp \
-    lib/DiscIOWBFS.cpp \
     lib/FileIOFILE.cpp \
     lib/FileIOMEM.cpp \
     lib/DiscBase.cpp \
     lib/DiscGCN.cpp \
     lib/DiscWii.cpp \
-    main.cpp
+    main.cpp \
+    lib/DiscIOWBFS.cpp \
+    lib/DiscIOISO.cpp

include/DiscBase.hpp

@@ -1,9 +1,11 @@
 #ifndef __NOD_DISC_BASE__
 #define __NOD_DISC_BASE__
 
+#include <vector>
 #include <list>
 #include <memory>
 #include <string>
+#include "Util.hpp"
 #include "IDiscIO.hpp"
 #include "IFileIO.hpp"
 
@@ -12,56 +14,105 @@ namespace NOD
 
 class DiscBase
 {
-    IDiscIO& m_discIO;
-
 public:
-    class IPartReadStream
+    struct Header
+    {
+        char gameID[6];
+        char discNum;
+        char discVersion;
+        char audioStreaming;
+        char streamBufSz;
+        char unk[14];
+        uint32_t wiiMagic;
+        uint32_t gcnMagic;
+        char gameTitle[64];
+
+        Header(IDiscIO& dio)
+        {
+            std::unique_ptr<IDiscIO::IReadStream> s = dio.beginReadStream(0);
+            s->read(this, sizeof(*this));
+            wiiMagic = SBig(wiiMagic);
+            gcnMagic = SBig(gcnMagic);
+        }
+    };
+
+    struct FSTNode
+    {
+        uint32_t typeAndNameOff;
+        uint32_t offset;
+        uint32_t length;
+        FSTNode(IDiscIO::IReadStream& s)
+        {
+            s.read(this, 12);
+            typeAndNameOff = SBig(typeAndNameOff);
+            offset = SBig(offset);
+            length = SBig(length);
+        }
+    };
+
+    struct IPartReadStream
     {
-    public:
         virtual size_t read(void* buf, size_t length)=0;
     };
 
-    class IPartWriteStream
+    struct IPartWriteStream
     {
-    public:
         virtual size_t write(void* buf, size_t length)=0;
     };
 
-protected:
-    class Partition
+    class IPartition
     {
     public:
         enum Kind
         {
             PART_DATA,
-            PART_UPDATE
+            PART_UPDATE,
+            PART_CHANNEL
         };
-        class File
+        class Node
         {
-            const Partition& m_parent;
+        public:
+            enum Kind
+            {
+                NODE_FILE,
+                NODE_DIRECTORY
+            };
+        private:
+            const IPartition& m_parent;
+            Kind m_kind;
+            std::string m_name;
+
             std::unique_ptr<IFileIO> m_hddFile;
-            std::string m_discPath;
             size_t m_discOffset;
             size_t m_discLength;
+
         public:
-            File(const Partition& parent, const std::string& discPath)
-            : m_parent(parent), m_discPath(discPath) {}
+            Node(const IPartition& parent, bool isDir, const char* name)
+            : m_parent(parent), m_kind(isDir ? NODE_DIRECTORY : NODE_FILE), m_name(name) {}
+            inline Kind getKind() const {return m_kind;}
             std::unique_ptr<IPartReadStream> beginReadStream();
         };
-    private:
-        std::list<File> files;
+    protected:
+        std::list<Node> files;
+        const DiscBase& m_parent;
         Kind m_kind;
+        size_t m_offset;
     public:
-        Partition(Kind kind)
-        : m_kind(kind) {}
+        IPartition(const DiscBase& parent, Kind kind, size_t offset)
+        : m_parent(parent), m_kind(kind), m_offset(offset) {}
+        inline Kind getKind() const {return m_kind;}
         std::unique_ptr<IPartReadStream> beginReadStream(size_t offset);
     };
-    std::list<Partition> partitions;
-    Partition& addPartition(Partition::Kind kind);
-public:
-    DiscBase(IDiscIO& dio);
-    virtual bool sync()=0;
 
+protected:
+    std::unique_ptr<IDiscIO> m_discIO;
+    Header m_header;
+    std::vector<std::unique_ptr<IPartition>> m_partitions;
+public:
+    DiscBase(std::unique_ptr<IDiscIO>&& dio);
+    virtual bool commit()=0;
+    inline Header getHeader() const {return m_header;}
+    inline const IDiscIO& getDiscIO() const {return *m_discIO.get();}
 };
 
 }

include/DiscGCN.hpp

@@ -9,7 +9,8 @@ namespace NOD
 class DiscGCN : public DiscBase
 {
 public:
-    DiscGCN(IDiscIO& discio);
+    DiscGCN(std::unique_ptr<IDiscIO>&& dio);
+    bool commit();
 };
 
 }

include/DiscWii.hpp

@@ -9,7 +9,8 @@ namespace NOD
 class DiscWii : public DiscBase
 {
 public:
-    DiscWii(IDiscIO& discio);
+    DiscWii(std::unique_ptr<IDiscIO>&& dio);
+    bool commit();
 };
 
 }

include/IDiscIO.hpp

@@ -3,6 +3,7 @@
 
 #include <memory>
 #include <stdlib.h>
+#include <stdio.h>
 
 namespace NOD
 {
@@ -12,19 +13,18 @@ class IDiscIO
 public:
     virtual ~IDiscIO() {}
 
-    class IReadStream
+    struct IReadStream
     {
-    public:
         virtual size_t read(void* buf, size_t length)=0;
+        virtual void seek(size_t offset, int whence=SEEK_SET)=0;
     };
-    virtual std::unique_ptr<IReadStream> beginReadStream(size_t offset)=0;
+    virtual std::unique_ptr<IReadStream> beginReadStream(size_t offset=0) const=0;
 
-    class IWriteStream
+    struct IWriteStream
     {
-    public:
         virtual size_t write(void* buf, size_t length)=0;
     };
-    virtual std::unique_ptr<IWriteStream> beginWriteStream(size_t offset)=0;
+    virtual std::unique_ptr<IWriteStream> beginWriteStream(size_t offset=0) const=0;
 };
 
 }

include/IFileIO.hpp

@@ -14,17 +14,15 @@ public:
     virtual ~IFileIO() {}
     virtual size_t size()=0;
 
-    class IWriteStream
+    struct IWriteStream
     {
-    public:
         virtual ~IWriteStream() {}
         virtual size_t copyFromDisc(IDiscIO::IReadStream& discio, size_t length)=0;
     };
     virtual std::unique_ptr<IWriteStream> beginWriteStream();
 
-    class IReadStream
+    struct IReadStream
     {
-    public:
         virtual ~IReadStream() {}
         virtual size_t copyToDisc(IDiscIO::IWriteStream& discio, size_t length)=0;
     };

include/NODLib.hpp

@@ -2,15 +2,19 @@
 #define __NOD_LIB__
 
 #include <memory>
-#include "DiscGCN.hpp"
-#include "DiscWii.hpp"
-#include "IDiscIO.hpp"
 
 namespace NOD
 {
 
-std::unique_ptr<DiscBase> OpenDiscFromImage(const char* path);
+class DiscBase;
+
+std::unique_ptr<DiscBase> OpenDiscFromImage(const char* path, bool& isWii);
 
 }
 
+#include "DiscGCN.hpp"
+#include "DiscWii.hpp"
+#include "IDiscIO.hpp"
+#include "Util.hpp"
+
 #endif // __NOD_LIB__

include/Util.hpp

@@ -0,0 +1,86 @@
+#ifndef __NOD_UTIL_HPP__
+#define __NOD_UTIL_HPP__
+
+namespace NOD
+{
+
+/* Type-sensitive byte swappers */
+template <typename T>
+static inline T bswap16(T val)
+{
+#if __GNUC__
+    return __builtin_bswap16(val);
+#elif _WIN32
+    return _byteswap_ushort(val);
+#else
+    return (val = (val << 8) | ((val >> 8) & 0xFF));
+#endif
+}
+
+template <typename T>
+static inline T bswap32(T val)
+{
+#if __GNUC__
+    return __builtin_bswap32(val);
+#elif _WIN32
+    return _byteswap_ulong(val);
+#else
+    val = (val & 0x0000FFFF) << 16 | (val & 0xFFFF0000) >> 16;
+    val = (val & 0x00FF00FF) << 8 | (val & 0xFF00FF00) >> 8;
+    return val;
+#endif
+}
+
+template <typename T>
+static inline T bswap64(T val)
+{
+#if __GNUC__
+    return __builtin_bswap64(val);
+#elif _WIN32
+    return _byteswap_uint64(val);
+#else
+    return ((val & 0xFF00000000000000ULL) >> 56) |
+           ((val & 0x00FF000000000000ULL) >> 40) |
+           ((val & 0x0000FF0000000000ULL) >> 24) |
+           ((val & 0x000000FF00000000ULL) >>  8) |
+           ((val & 0x00000000FF000000ULL) <<  8) |
+           ((val & 0x0000000000FF0000ULL) << 24) |
+           ((val & 0x000000000000FF00ULL) << 40) |
+           ((val & 0x00000000000000FFULL) << 56);
+#endif
+}
+
+
+#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
+static inline int16_t SBig(int16_t val) {return bswap16(val);}
+static inline uint16_t SBig(uint16_t val) {return bswap16(val);}
+static inline int32_t SBig(int32_t val) {return bswap32(val);}
+static inline uint32_t SBig(uint32_t val) {return bswap32(val);}
+static inline int64_t SBig(int64_t val) {return bswap64(val);}
+static inline uint64_t SBig(uint64_t val) {return bswap64(val);}
+
+static inline int16_t SLittle(int16_t val) {return val;}
+static inline uint16_t SLittle(uint16_t val) {return val;}
+static inline int32_t SLittle(int32_t val) {return val;}
+static inline uint32_t SLittle(uint32_t val) {return val;}
+static inline int64_t SLittle(int64_t val) {return val;}
+static inline uint64_t SLittle(uint64_t val) {return val;}
+#else
+static inline int16_t SLittle(int16_t val) {return bswap16(val);}
+static inline uint16_t SLittle(uint16_t val) {return bswap16(val);}
+static inline int32_t SLittle(int32_t val) {return bswap32(val);}
+static inline uint32_t SLittle(uint32_t val) {return bswap32(val);}
+static inline int64_t SLittle(int64_t val) {return bswap64(val);}
+static inline uint64_t SLittle(uint64_t val) {return bswap64(val);}
+
+static inline int16_t SBig(int16_t val) {return val;}
+static inline uint16_t SBig(uint16_t val) {return val;}
+static inline int32_t SBig(int32_t val) {return val;}
+static inline uint32_t SBig(uint32_t val) {return val;}
+static inline int64_t SBig(int64_t val) {return val;}
+static inline uint64_t SBig(uint64_t val) {return val;}
+#endif
+
+}
+
+#endif // __NOD_UTIL_HPP__

lib/DiscBase.cpp

@@ -3,4 +3,9 @@
 namespace NOD
 {
 
+DiscBase::DiscBase(std::unique_ptr<IDiscIO>&& dio)
+: m_discIO(std::move(dio)), m_header(*m_discIO.get())
+{
+}
+
 }

lib/DiscGCN.cpp

@@ -0,0 +1,17 @@
+#include "DiscGCN.hpp"
+
+namespace NOD
+{
+
+DiscGCN::DiscGCN(std::unique_ptr<IDiscIO>&& dio)
+: DiscBase(std::move(dio))
+{
+
+}
+
+bool DiscGCN::commit()
+{
+    return false;
+}
+
+}

lib/DiscIOISO.cpp

@@ -5,25 +5,27 @@
 namespace NOD
 {
 
-class DiscIOFILE : public IDiscIO
+class DiscIOISO : public IDiscIO
 {
     std::string filepath;
 public:
-    DiscIOFILE(const std::string& fpin)
+    DiscIOISO(const std::string& fpin)
     : filepath(fpin) {}
 
-    class FILEReadStream : public IReadStream
+    class ReadStream : public IReadStream
     {
-        friend class DiscIOFILE;
+        friend class DiscIOISO;
         FILE* fp;
-        FILEReadStream(FILE* fpin)
+        ReadStream(FILE* fpin)
         : fp(fpin) {}
-        ~FILEReadStream() {fclose(fp);}
+        ~ReadStream() {fclose(fp);}
     public:
         size_t read(void* buf, size_t length)
         {return fread(buf, 1, length, fp);}
+        void seek(size_t offset, int whence)
+        {fseek(fp, offset, whence);}
     };
-    std::unique_ptr<IReadStream> beginReadStream(size_t offset)
+    std::unique_ptr<IReadStream> beginReadStream(size_t offset) const
     {
         FILE* fp = fopen(filepath.c_str(), "rb");
         if (!fp)
@@ -32,21 +34,21 @@ public:
             return std::unique_ptr<IReadStream>();
         }
         fseek(fp, offset, SEEK_SET);
-        return std::unique_ptr<IReadStream>(new FILEReadStream(fp));
+        return std::unique_ptr<IReadStream>(new ReadStream(fp));
     }
 
-    class FILEWriteStream : public IWriteStream
+    class WriteStream : public IWriteStream
     {
-        friend class DiscIOFILE;
+        friend class DiscIOISO;
         FILE* fp;
-        FILEWriteStream(FILE* fpin)
+        WriteStream(FILE* fpin)
         : fp(fpin) {}
-        ~FILEWriteStream() {fclose(fp);}
+        ~WriteStream() {fclose(fp);}
     public:
         size_t write(void* buf, size_t length)
         {return fwrite(buf, 1, length, fp);}
     };
-    std::unique_ptr<IWriteStream> beginWriteStream(size_t offset)
+    std::unique_ptr<IWriteStream> beginWriteStream(size_t offset) const
     {
         FILE* fp = fopen(filepath.c_str(), "wb");
         if (!fp)
@@ -55,13 +57,13 @@ public:
             return std::unique_ptr<IWriteStream>();
         }
         fseek(fp, offset, SEEK_SET);
-        return std::unique_ptr<IWriteStream>(new FILEWriteStream(fp));
+        return std::unique_ptr<IWriteStream>(new WriteStream(fp));
     }
 };
 
-std::unique_ptr<IDiscIO> NewDiscIOFILE(const char* path)
+std::unique_ptr<IDiscIO> NewDiscIOISO(const char* path)
 {
-    return std::unique_ptr<IDiscIO>(new DiscIOFILE(path));
+    return std::unique_ptr<IDiscIO>(new DiscIOISO(path));
 }
 
 }

lib/DiscIOWBFS.cpp

@@ -0,0 +1,70 @@
+#include <stdio.h>
+#include <stdexcept>
+#include "IDiscIO.hpp"
+
+namespace NOD
+{
+
+class DiscIOWBFS : public IDiscIO
+{
+    std::string filepath;
+public:
+    DiscIOWBFS(const std::string& fpin)
+    : filepath(fpin) {}
+
+    class ReadStream : public IReadStream
+    {
+        friend class DiscIOWBFS;
+        FILE* fp;
+        ReadStream(FILE* fpin)
+        : fp(fpin) {}
+        ~ReadStream() {fclose(fp);}
+    public:
+        size_t read(void* buf, size_t length)
+        {return fread(buf, 1, length, fp);}
+        void seek(size_t offset, int whence)
+        {fseek(fp, offset, whence);}
+    };
+    std::unique_ptr<IReadStream> beginReadStream(size_t offset) const
+    {
+        FILE* fp = fopen(filepath.c_str(), "rb");
+        if (!fp)
+        {
+            throw std::runtime_error("Unable to open '" + filepath + "' for reading");
+            return std::unique_ptr<IReadStream>();
+        }
+        fseek(fp, offset, SEEK_SET);
+        return std::unique_ptr<IReadStream>(new ReadStream(fp));
+    }
+
+    class WriteStream : public IWriteStream
+    {
+        friend class DiscIOWBFS;
+        FILE* fp;
+        WriteStream(FILE* fpin)
+        : fp(fpin) {}
+        ~WriteStream() {fclose(fp);}
+    public:
+        size_t write(void* buf, size_t length)
+        {return fwrite(buf, 1, length, fp);}
+    };
+    std::unique_ptr<IWriteStream> beginWriteStream(size_t offset) const
+    {
+        FILE* fp = fopen(filepath.c_str(), "wb");
+        if (!fp)
+        {
+            throw std::runtime_error("Unable to open '" + filepath + "' for writing");
+            return std::unique_ptr<IWriteStream>();
+        }
+        fseek(fp, offset, SEEK_SET);
+        return std::unique_ptr<IWriteStream>(new WriteStream(fp));
+    }
+};
+
+std::unique_ptr<IDiscIO> NewDiscIOWBFS(const char* path)
+{
+    return std::unique_ptr<IDiscIO>(new DiscIOWBFS(path));
+}
+
+}
+

lib/DiscWii.cpp

@@ -1,7 +1,259 @@
+#include <stdio.h>
 #include "DiscWii.hpp"
 
 namespace NOD
 {
 
+class PartitionWii : public DiscBase::IPartition
+{
+    struct Ticket
+    {
+        uint32_t sigType;
+        char sig[256];
+        char padding[60];
+        char sigIssuer[64];
+        char ecdh[60];
+        char padding1[3];
+        unsigned char encKey[16];
+        char padding2;
+        char ticketId[8];
+        char consoleId[4];
+        char titleId[8];
+        char padding3[2];
+        uint16_t ticketVersion;
+        uint32_t permittedTitlesMask;
+        uint32_t permitMask;
+        char titleExportAllowed;
+        char commonKeyIdx;
+        char padding4[48];
+        char contentAccessPermissions[64];
+        char padding5[2];
+        struct TimeLimit
+        {
+            uint32_t enableTimeLimit;
+            uint32_t timeLimit;
+        } timeLimits[8];
+
+        void read(IDiscIO::IReadStream& s)
+        {
+            s.read(this, 676);
+            sigType = SBig(sigType);
+            ticketVersion = SBig(ticketVersion);
+            permittedTitlesMask = SBig(permittedTitlesMask);
+            permitMask = SBig(permitMask);
+            for (size_t t=0 ; t<8 ; ++t)
+            {
+                timeLimits[t].enableTimeLimit = SBig(timeLimits[t].enableTimeLimit);
+                timeLimits[t].timeLimit = SBig(timeLimits[t].timeLimit);
+            }
+        }
+    } m_ticket;
+
+    struct TMD
+    {
+        uint32_t sigType;
+        char sig[256];
+        char padding[60];
+        char sigIssuer[64];
+        char version;
+        char caCrlVersion;
+        char signerCrlVersion;
+        char padding1;
+        uint32_t iosIdMajor;
+        uint32_t iosIdMinor;
+        uint32_t titleIdMajor;
+        uint32_t titleIdMinor;
+        uint32_t titleType;
+        uint16_t groupId;
+        char padding2[62];
+        uint32_t accessFlags;
+        uint16_t titleVersion;
+        uint16_t numContents;
+        uint16_t bootIdx;
+        uint16_t padding3;
+
+        struct Content
+        {
+            uint32_t id;
+            uint16_t index;
+            uint16_t type;
+            uint64_t size;
+            char hash[20];
+
+            void read(IDiscIO::IReadStream& s)
+            {
+                s.read(this, 36);
+                id = SBig(id);
+                index = SBig(index);
+                type = SBig(type);
+                size = SBig(size);
+            }
+        };
+        std::vector<Content> contents;
+
+        void read(IDiscIO::IReadStream& s)
+        {
+            s.read(this, 484);
+            sigType = SBig(sigType);
+            iosIdMajor = SBig(iosIdMajor);
+            iosIdMinor = SBig(iosIdMinor);
+            titleIdMajor = SBig(titleIdMajor);
+            titleIdMinor = SBig(titleIdMinor);
+            titleType = SBig(titleType);
+            groupId = SBig(groupId);
+            accessFlags = SBig(accessFlags);
+            titleVersion = SBig(titleVersion);
+            numContents = SBig(numContents);
+            bootIdx = SBig(bootIdx);
+            for (size_t c=0 ; c<numContents ; ++c)
+            {
+                contents.emplace_back();
+                contents.back().read(s);
+            }
+        }
+    } m_tmd;
+
+    struct Certificate
+    {
+        uint32_t sigType;
+        char sig[512];
+        char issuer[64];
+        uint32_t keyType;
+        char subject[64];
+        char key[512];
+        uint32_t modulus;
+        uint32_t pubExp;
+
+        void read(IDiscIO::IReadStream& s)
+        {
+            s.read(&sigType, 4);
+            sigType = SBig(sigType);
+            if (sigType == 0x00010000)
+                s.read(sig, 512);
+            else if (sigType == 0x00010001)
+                s.read(sig, 256);
+            else if (sigType == 0x00010002)
+                s.read(sig, 64);
+            s.seek(60, SEEK_CUR);
+
+            s.read(issuer, 64);
+            s.read(&keyType, 4);
+            s.read(subject, 64);
+            keyType = SBig(keyType);
+            if (keyType == 0x00000000)
+                s.read(key, 512);
+            else if (keyType == 0x00000001)
+                s.read(key, 256);
+
+            s.read(&modulus, 8);
+            modulus = SBig(modulus);
+            pubExp = SBig(pubExp);
+
+            s.seek(52, SEEK_CUR);
+        }
+    };
+    Certificate m_caCert;
+    Certificate m_tmdCert;
+    Certificate m_ticketCert;
+
+public:
+    PartitionWii(const DiscWii& parent, Kind kind, size_t offset)
+    : IPartition(parent, kind, offset)
+    {
+        std::unique_ptr<IDiscIO::IReadStream> s = parent.getDiscIO().beginReadStream(offset);
+        m_ticket.read(*s.get());
+
+        uint32_t tmdSize;
+        s->read(&tmdSize, 4);
+        tmdSize = SBig(tmdSize);
+        uint32_t tmdOff;
+        s->read(&tmdOff, 4);
+        tmdOff = SBig(tmdOff) << 2;
+
+        uint32_t certChainSize;
+        s->read(&certChainSize, 4);
+        certChainSize = SBig(certChainSize);
+        uint32_t certChainOff;
+        s->read(&certChainOff, 4);
+        certChainOff = SBig(certChainOff) << 2;
+
+        uint32_t globalHashTableOff;
+        s->read(&globalHashTableOff, 4);
+        globalHashTableOff = SBig(globalHashTableOff) << 2;
+
+        uint32_t dataOff;
+        s->read(&dataOff, 4);
+        dataOff = SBig(dataOff) << 2;
+        uint32_t dataSize;
+        s->read(&dataSize, 4);
+        dataSize = SBig(dataSize) << 2;
+
+        s->seek(offset + tmdOff);
+        m_tmd.read(*s.get());
+
+        s->seek(offset + certChainOff);
+        m_caCert.read(*s.get());
+        m_tmdCert.read(*s.get());
+        m_ticketCert.read(*s.get());
+
+    }
+};
+
+DiscWii::DiscWii(std::unique_ptr<IDiscIO>&& dio)
+: DiscBase(std::move(dio))
+{
+    /* Read partition info */
+    struct PartInfo {
+        uint32_t partCount;
+        uint32_t partInfoOff;
+        struct Part
+        {
+            uint32_t partDataOff;
+            enum Type : uint32_t
+            {
+                PART_DATA = 0,
+                PART_UPDATE = 1,
+                PART_CHANNEL = 2
+            } partType;
+        } parts[4];
+        PartInfo(IDiscIO& dio)
+        {
+            std::unique_ptr<IDiscIO::IReadStream> s = dio.beginReadStream(0x40000);
+            s->read(this, 32);
+            partCount = SBig(partCount);
+            partInfoOff = SBig(partInfoOff);
+
+            s->seek(partInfoOff << 2);
+            for (uint32_t p=0 ; p<partCount && p<4 ; ++p)
+            {
+                s->read(&parts[p], 8);
+                parts[p].partDataOff = SBig(parts[p].partDataOff);
+                parts[p].partType = (Part::Type)SBig(parts[p].partType);
+            }
+        }
+    } partInfo(*m_discIO.get());
+
+    /* Iterate for data partition */
+    m_partitions.reserve(partInfo.partCount);
+    for (uint32_t p=0 ; p<partInfo.partCount && p<4 ; ++p)
+    {
+        PartInfo::Part& part = partInfo.parts[p];
+        IPartition::Kind kind;
+        if (part.partType == PartInfo::Part::PART_DATA)
+            kind = IPartition::PART_DATA;
+        else if (part.partType == PartInfo::Part::PART_UPDATE)
+            kind = IPartition::PART_UPDATE;
+        else if (part.partType == PartInfo::Part::PART_CHANNEL)
+            kind = IPartition::PART_CHANNEL;
+        else
+            throw std::runtime_error("Invalid partition type");
+        m_partitions.emplace_back(new PartitionWii(*this, kind, part.partDataOff << 2));
+    }
+}
+
+bool DiscWii::commit()
+{
+    return false;
+}
 
 }

lib/FileIOFILE.cpp

@@ -0,0 +1,21 @@
+#include <sys/stat.h>
+#include <stdexcept>
+#include "IFileIO.hpp"
+
+namespace NOD
+{
+
+class FileIOFILE : public IFileIO
+{
+    const char* filepath;
+public:
+    FileIOFILE(const char* path)
+    : filepath(path)
+    {
+        struct stat theStat;
+        if (stat(path, &theStat))
+            throw std::runtime_error("unable to ");
+    }
+};
+
+}

lib/FileIOMEM.cpp

@@ -0,0 +1,10 @@
+#include "IFileIO.hpp"
+
+namespace NOD
+{
+
+class FileIOMEM : public IFileIO
+{
+};
+
+}

lib/NODLib.cpp

@@ -0,0 +1,67 @@
+#include <stdio.h>
+#include "NODLib.hpp"
+#include "DiscBase.hpp"
+
+namespace NOD
+{
+std::unique_ptr<IDiscIO> NewDiscIOISO(const char* path);
+std::unique_ptr<IDiscIO> NewDiscIOWBFS(const char* path);
+
+std::unique_ptr<DiscBase> OpenDiscFromImage(const char* path, bool& isWii)
+{
+    /* Temporary file handle to determine image type */
+    FILE* fp = fopen(path, "rb");
+    if (!fp)
+    {
+        throw std::runtime_error("Unable to open '" + std::string(path) + "'");
+        return std::unique_ptr<DiscBase>();
+    }
+
+    isWii = false;
+    std::unique_ptr<IDiscIO> discIO;
+    uint32_t magic;
+    fread(&magic, 1, 4, fp);
+    if (magic == NOD::SBig((uint32_t)'WBFS'))
+    {
+        fclose(fp);
+        discIO = NewDiscIOWBFS(path);
+        isWii = true;
+    }
+    else
+    {
+        fseek(fp, 0x18, SEEK_SET);
+        fread(&magic, 1, 4, fp);
+        magic = NOD::SBig(magic);
+        if (magic == 0x5D1C9EA3)
+        {
+            fclose(fp);
+            discIO = NewDiscIOISO(path);
+            isWii = true;
+        }
+        else
+        {
+            fread(&magic, 1, 4, fp);
+            magic = NOD::SBig(magic);
+            if (magic == 0xC2339F3D)
+            {
+                fclose(fp);
+                discIO = NewDiscIOISO(path);
+            }
+        }
+    }
+
+    if (!discIO)
+    {
+        throw std::runtime_error("'" + std::string(path) + "' is not a valid image");
+        return std::unique_ptr<DiscBase>();
+    }
+
+    if (isWii)
+        return std::unique_ptr<DiscBase>(new DiscWii(std::move(discIO)));
+
+    return std::unique_ptr<DiscBase>(new DiscGCN(std::move(discIO)));
+
+}
+
+}
+

main.cpp

@@ -1,11 +1,17 @@
+#include <stdio.h>
+#include <string.h>
 #include "NODLib.hpp"
 
 int main(int argc, char* argv[])
 {
     if (argc < 2)
+    {
+        fprintf(stderr, "Usage: nodlib <image-in>\n");
         return -1;
+    }
 
-    std::unique_ptr<NOD::DiscBase> disc = NOD::OpenDiscFromImage(argv[1]);
+    bool isWii;
+    std::unique_ptr<NOD::DiscBase> disc = NOD::OpenDiscFromImage(argv[1], isWii);
     if (!disc)
         return -1;