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