/* PhysFS_DLL - (c)2003 Gregory S. Read

 * Internal class that provides direct access to the PhysFS DLL.  It is

 * not accessible outside of the PhysFS.NET assembly.

 */

using System.Collections;

using System.Runtime.InteropServices;

namespace PhysFS_NET

{

   internal class PhysFS_DLL

   {

      /* Static constructor

       * Initializes the PhysFS API before any method is called in this class.  This

       * relieves the user from having to explicitly initialize the API.

       * Parameters

       *    none

       * Returns

       *    none

       * Exceptions

       *    PhysFSException - An error occured in the PhysFS API

       */

      static PhysFS_DLL()

      {

         if(PHYSFS_init("") == 0)

            throw new PhysFSException();

      }

      /* BytePPToArray

       * Converts a C-style string array into a .NET managed string array

       * Parameters

       *    C-style string array pointer returned from PhysFS

       * Returns

       *    .NET managed string array

       * Exceptions

       *    none

       */

      public unsafe static string[] BytePPToArray(byte **bytearray)

      {

         byte** ptr;

         byte* c;

         string tempstr;

         ArrayList MyArrayList = new ArrayList();

         string[] RetArray;

         for(ptr = bytearray; *ptr != null; ptr++)

         {

            tempstr = "";

            for(c = *ptr; *c != 0; c++)

            {

               tempstr += (char)*c;

            }

            // Add string to our list

            MyArrayList.Add(tempstr);

         }

         // Return a normal array of the list

         RetArray = new string[MyArrayList.Count];

         MyArrayList.CopyTo(RetArray, 0);

         return RetArray;

      }

      // Name of DLL to import

      private const string PHYSFS_DLLNAME = "physfs.dll";

      // DLL import declarations

      [DllImport(PHYSFS_DLLNAME)] public static extern int PHYSFS_init(string argv0);

      [DllImport(PHYSFS_DLLNAME)] public static extern int PHYSFS_deinit();

      [DllImport(PHYSFS_DLLNAME)] public static extern unsafe void PHYSFS_freeList(void *listVar);

      [DllImport(PHYSFS_DLLNAME)] public static extern string PHYSFS_getLastError();

      [DllImport(PHYSFS_DLLNAME)] public static extern string PHYSFS_getDirSeparator();

      [DllImport(PHYSFS_DLLNAME)] public static extern void PHYSFS_permitSymbolicLinks(int allow);

      [DllImport(PHYSFS_DLLNAME)] public static extern unsafe byte** PHYSFS_getCdRomDirs();

      [DllImport(PHYSFS_DLLNAME)] public static extern string PHYSFS_getBaseDir();

      [DllImport(PHYSFS_DLLNAME)] public static extern string PHYSFS_getUserDir();

      [DllImport(PHYSFS_DLLNAME)] public static extern string PHYSFS_getWriteDir();

      [DllImport(PHYSFS_DLLNAME)] public static extern int PHYSFS_setWriteDir(string newDir);

      [DllImport(PHYSFS_DLLNAME)] public static extern int PHYSFS_addToSearchPath(string newDir, int appendToPath);

      [DllImport(PHYSFS_DLLNAME)] public static extern int PHYSFS_removeFromSearchPath(string oldDir);

      [DllImport(PHYSFS_DLLNAME)] public static extern unsafe byte** PHYSFS_getSearchPath();

      [DllImport(PHYSFS_DLLNAME)] public static extern int PHYSFS_setSaneConfig(string organization,

         string appName,

         string archiveExt,

         int includeCdRoms,

         int archivesFirst);

      [DllImport(PHYSFS_DLLNAME)] public static extern int PHYSFS_mkdir(string dirName);

      [DllImport(PHYSFS_DLLNAME)] public static extern int PHYSFS_delete(string filename);

      [DllImport(PHYSFS_DLLNAME)] public static extern string PHYSFS_getRealDir(string filename);

      [DllImport(PHYSFS_DLLNAME)] public static extern unsafe byte** PHYSFS_enumerateFiles(string dir);

      [DllImport(PHYSFS_DLLNAME)] public static extern int PHYSFS_exists(string fname);

      [DllImport(PHYSFS_DLLNAME)] public static extern int PHYSFS_isDirectory(string fname);

      [DllImport(PHYSFS_DLLNAME)] public static extern int PHYSFS_isSymbolicLink(string fname);

      [DllImport(PHYSFS_DLLNAME)] public static extern unsafe void* PHYSFS_openWrite(string filename);

      [DllImport(PHYSFS_DLLNAME)] public static extern unsafe void* PHYSFS_openAppend(string filename);

      [DllImport(PHYSFS_DLLNAME)] public static extern unsafe void* PHYSFS_openRead(string filename);

      [DllImport(PHYSFS_DLLNAME)] public static extern unsafe int PHYSFS_close(void* handle);

      [DllImport(PHYSFS_DLLNAME)] public static extern unsafe long PHYSFS_getLastModTime(string filename);

      [DllImport(PHYSFS_DLLNAME)] public static extern unsafe long PHYSFS_read(void* handle,

         void *buffer,

         uint objSize,

         uint objCount);

      [DllImport(PHYSFS_DLLNAME)] public static extern unsafe long PHYSFS_write(void* handle,

         void *buffer,

         uint objSize,

         uint objCount);

      [DllImport(PHYSFS_DLLNAME)] public static extern unsafe int PHYSFS_eof(void* handle);

      [DllImport(PHYSFS_DLLNAME)] public static extern unsafe long PHYSFS_tell(void* handle);

      [DllImport(PHYSFS_DLLNAME)] public static extern unsafe int PHYSFS_seek(void* handle, ulong pos);

      [DllImport(PHYSFS_DLLNAME)] public static extern unsafe long PHYSFS_fileLength(void* handle);

      [DllImport(PHYSFS_DLLNAME)] public static extern unsafe int PHYSFS_setBuffer(void* handle, ulong bufsize);

      [DllImport(PHYSFS_DLLNAME)] public static extern unsafe int PHYSFS_flush(void* handle);

   }

}