using System; using System.Linq; using System.Runtime.InteropServices; namespace SharpPhysFS { [UnmanagedFunctionPointer(CallingConvention.Cdecl)] public delegate int InitDelegate(); [UnmanagedFunctionPointer(CallingConvention.Cdecl)] public delegate void DeinitDelegate(); [UnmanagedFunctionPointer(CallingConvention.Cdecl)] public delegate IntPtr MallocDelegate(ulong size); [UnmanagedFunctionPointer(CallingConvention.Cdecl)] public delegate IntPtr ReallocDelegate(IntPtr ptr, ulong size); [UnmanagedFunctionPointer(CallingConvention.Cdecl)] public delegate void FreeDelegate(IntPtr ptr); public delegate void StringCallback(IntPtr data, string str); [UnmanagedFunctionPointer(CallingConvention.Cdecl)] public delegate void EnumFilesCallback(IntPtr data, string origdir, string fname); [StructLayout(LayoutKind.Sequential)] public struct ArchiveInfo { [MarshalAs(UnmanagedType.LPStr)] public string extension; [MarshalAs(UnmanagedType.LPStr)] public string description; [MarshalAs(UnmanagedType.LPStr)] public string author; [MarshalAs(UnmanagedType.LPStr)] public string url; } [StructLayout(LayoutKind.Sequential)] public struct Version { public byte major; public byte minor; public byte patch; } [StructLayout(LayoutKind.Sequential)] public class Allocator { [MarshalAs(UnmanagedType.FunctionPtr)] public InitDelegate Init; [MarshalAs(UnmanagedType.FunctionPtr)] public DeinitDelegate Deinit; [MarshalAs(UnmanagedType.FunctionPtr)] public MallocDelegate Malloc; [MarshalAs(UnmanagedType.FunctionPtr)] public ReallocDelegate Realloc; [MarshalAs(UnmanagedType.FunctionPtr)] public FreeDelegate Free; } static class DynamicLoader { #region Windows [DllImport("kernel32.dll", SetLastError = true)] public static extern IntPtr LoadLibrary(string lpFileName); [DllImport("kernel32.dll", CharSet = CharSet.Ansi, ExactSpelling = true, SetLastError = true)] public static extern IntPtr GetProcAddress(IntPtr hModule, string procName); [DllImport("kernel32.dll", CharSet = CharSet.Ansi, ExactSpelling = true, SetLastError = true)] public static extern bool FreeLibrary(IntPtr hModule); #endregion #region Unix [DllImport("libdl.so", CallingConvention = CallingConvention.Cdecl, EntryPoint = "dlopen")] public static extern IntPtr unix_dlopen(string filename, int flags); [DllImport("libdl.so", CallingConvention = CallingConvention.Cdecl, EntryPoint = "dlsym")] public static extern IntPtr unix_dlsym(IntPtr handle, string symbol); [DllImport("libdl.so", CallingConvention = CallingConvention.Cdecl, EntryPoint = "dlclose")] public static extern bool unix_dlclose(IntPtr handle); #endregion } static class Interop { public static bool init = false; [UnmanagedFunctionPointer(CallingConvention.Cdecl)] public delegate void FnGetLinkedVersion(ref Version v); [UnmanagedFunctionPointer(CallingConvention.Cdecl)] public delegate int FnInit(string argv0); [UnmanagedFunctionPointer(CallingConvention.Cdecl)] public delegate int FnDeinit(); [UnmanagedFunctionPointer(CallingConvention.Cdecl)] public delegate int FnClose(IntPtr ptr); [UnmanagedFunctionPointer(CallingConvention.Cdecl)] public delegate IntPtr FnSupportedArchiveTypes(); [UnmanagedFunctionPointer(CallingConvention.Cdecl)] public delegate void FnFreeList(IntPtr h); [UnmanagedFunctionPointer(CallingConvention.Cdecl)] public delegate IntPtr FnGetLastError(); [UnmanagedFunctionPointer(CallingConvention.Cdecl)] public delegate void FnPermitSymbolicLinks(int permit); [UnmanagedFunctionPointer(CallingConvention.Cdecl)] public delegate int FnSetWriteDir(string s); [UnmanagedFunctionPointer(CallingConvention.Cdecl)] public delegate int FnAddToSearchPath(string s, int i); [UnmanagedFunctionPointer(CallingConvention.Cdecl)] public delegate int FnSetSaneConfig(string s1, string s2, string s3, int i1, int i2); [UnmanagedFunctionPointer(CallingConvention.Cdecl)] public delegate IntPtr FnEnumerateFiles(string s); [UnmanagedFunctionPointer(CallingConvention.Cdecl)] public delegate long FnGetLastModTime(string s); [UnmanagedFunctionPointer(CallingConvention.Cdecl)] public delegate long FnRead(IntPtr ptr1, IntPtr ptr2, uint i1, uint i2); [UnmanagedFunctionPointer(CallingConvention.Cdecl)] public delegate long FnTell(IntPtr ptr); [UnmanagedFunctionPointer(CallingConvention.Cdecl)] public delegate int FnSeek(IntPtr ptr, ulong u); [UnmanagedFunctionPointer(CallingConvention.Cdecl)] public delegate long FnFileLength(IntPtr ptr); [UnmanagedFunctionPointer(CallingConvention.Cdecl)] public delegate int FnSetAllocator(Allocator alloc); [UnmanagedFunctionPointer(CallingConvention.Cdecl)] public delegate int FnMount(string s1, string s2, int i); [UnmanagedFunctionPointer(CallingConvention.Cdecl)] public delegate void FnGetCdRomDirsCallback(StringCallback c, IntPtr ptr); [UnmanagedFunctionPointer(CallingConvention.Cdecl)] public delegate void FnEnumerateFilesCallback(string s, EnumFilesCallback c, IntPtr ptr); public static FnGetLinkedVersion PHYSFS_getLinkedVersion; public static FnInit PHYSFS_init; public static FnDeinit PHYSFS_deinit; public static FnSupportedArchiveTypes PHYSFS_supportedArchiveTypes; public static FnFreeList PHYSFS_freeList; public static FnGetLastError PHYSFS_getLastError; public static FnGetLastError PHYSFS_getDirSeparator; public static FnPermitSymbolicLinks PHYSFS_permitSymbolicLinks; public static FnSupportedArchiveTypes PHYSFS_getCdRomDirs; public static FnGetLastError PHYSFS_getBaseDir; public static FnGetLastError PHYSFS_getUserDir; public static FnGetLastError PHYSFS_getWriteDir; public static FnSetWriteDir PHYSFS_setWriteDir; public static FnAddToSearchPath PHYSFS_addToSearchPath; public static FnSetWriteDir PHYSFS_removeFromSearchPath; public static FnSupportedArchiveTypes PHYSFS_getSearchPath; public static FnSetSaneConfig PHYSFS_setSaneConfig; public static FnSetWriteDir PHYSFS_mkdir; public static FnSetWriteDir PHYSFS_delete; public static FnEnumerateFiles PHYSFS_getRealDir; public static FnEnumerateFiles PHYSFS_enumerateFiles; public static FnSetWriteDir PHYSFS_exists; public static FnSetWriteDir PHYSFS_isDirectory; public static FnSetWriteDir PHYSFS_isSymbolicLink; public static FnGetLastModTime PHYSFS_getLastModTime; public static FnEnumerateFiles PHYSFS_openWrite; public static FnEnumerateFiles PHYSFS_openAppend; public static FnEnumerateFiles PHYSFS_openRead; public static FnClose PHYSFS_close; public static FnRead PHYSFS_read; public static FnRead PHYSFS_write; public static FnClose PHYSFS_eof; public static FnTell PHYSFS_tell; public static FnSeek PHYSFS_seek; public static FnFileLength PHYSFS_fileLength; public static FnSeek PHYSFS_setBuffer; public static FnClose PHYSFS_flush; public static FnDeinit PHYSFS_isInit; public static FnDeinit PHYSFS_symbolicLinksPermitted; public static FnSetAllocator PHYSFS_setAllocator; public static FnMount PHYSFS_mount; public static FnEnumerateFiles PHYSFS_getMountPoint; public static FnGetCdRomDirsCallback PHYSFS_getCdRomDirsCallback; public static FnGetCdRomDirsCallback PHYSFS_getSearchPathCallback; public static FnEnumerateFilesCallback PHYSFS_enumerateFilesCallback; public static void SetUpInterop() { /* This method is used to dynamically load the physfs * library. It works by detecting the current platform * and deciding whether to use LoadLibrary/GetProcAddr * on Windows or dlopen/dlsym on Linux and OSX. * The the class is then scanned using reflection * to populate all the callbacks with the right function * pointers from the loaded library */ Func loadLibrary; Func loadSymbol; string libraryName; IntPtr library; if (Environment.OSVersion.Platform == PlatformID.Win32NT) { loadLibrary = DynamicLoader.LoadLibrary; loadSymbol = DynamicLoader.GetProcAddress; libraryName = "physfs.dll"; } else { loadLibrary = n => DynamicLoader.unix_dlopen(n, 1); loadSymbol = DynamicLoader.unix_dlsym; libraryName = "libphysfs.so"; } library = loadLibrary(libraryName); if (library == IntPtr.Zero) { throw new PhysFSLibNotFound(); } var fields = typeof(Interop).GetFields(); foreach(var field in fields.Where(x => x.Name.StartsWith("PHYSFS_"))) { var funcPtr = loadSymbol(library, field.Name); var del = Marshal.GetDelegateForFunctionPointer(funcPtr, field.FieldType); field.SetValue(null, del); } init = true; } } }