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FileSystem.d

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00001 /*******************************************************************************
00002 
00003         @file FileSystem.d
00004         
00005         Copyright (c) 2004 Kris Bell
00006         
00007         This software is provided 'as-is', without any express or implied
00008         warranty. In no event will the authors be held liable for damages
00009         of any kind arising from the use of this software.
00010         
00011         Permission is hereby granted to anyone to use this software for any 
00012         purpose, including commercial applications, and to alter it and/or 
00013         redistribute it freely, subject to the following restrictions:
00014         
00015         1. The origin of this software must not be misrepresented; you must 
00016            not claim that you wrote the original software. If you use this 
00017            software in a product, an acknowledgment within documentation of 
00018            said product would be appreciated but is not required.
00019 
00020         2. Altered source versions must be plainly marked as such, and must 
00021            not be misrepresented as being the original software.
00022 
00023         3. This notice may not be removed or altered from any distribution
00024            of the source.
00025 
00026         4. Derivative works are permitted, but they must carry this notice
00027            in full and credit the original source.
00028 
00029 
00030                         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
00031 
00032 
00033         @version        Initial version, March 2004      
00034         @author         Kris, John Reimer
00035 
00036 
00037 *******************************************************************************/
00038 
00039 module mango.io.FileSystem;
00040 
00041 private import  mango.io.Utf8,
00042                 mango.io.FilePath,
00043                 mango.io.Exception;
00044 
00045 // add some externs for linux
00046 version (Posix)
00047 {
00048         extern (C) int strlen (char *);
00049 }
00050 
00051 /*******************************************************************************
00052 
00053         Models an OS-specific file-system. Included here are methods to 
00054         list the system roots ("C:", "D:", etc) and to manipulate the
00055         current working directory.
00056 
00057 *******************************************************************************/
00058 
00059 class FileSystem
00060 {
00061         /***********************************************************************
00062         
00063                 A set of file-system specific constants for file and path
00064                 seperators (chars and strings).
00065 
00066         ***********************************************************************/
00067 
00068         version (Win32)
00069         {
00070                 static const char PathSeperatorChar = '\\';
00071                 static const char FileSeperatorChar = '.';
00072                 static const char RootSeperatorChar = ':';
00073 
00074                 static const char[] PathSeperatorString = "\\";
00075                 static const char[] FileSeperatorString = ".";
00076                 static const char[] RootSeperatorString = ":";
00077 
00078                 static const char[] NewlineString = "\r\n";
00079         }
00080         
00081         
00082         version (Posix)
00083         {
00084                 static const char PathSeperatorChar = '/';
00085                 static const char FileSeperatorChar = '.';
00086                 static const char RootSeperatorChar = ':';
00087 
00088                 static const char[] PathSeperatorString = "/";
00089                 static const char[] FileSeperatorString = ".";
00090                 static const char[] RootSeperatorString = ":";
00091 
00092                 static const char[] NewlineString = "\n";
00093         }            
00094 
00095         version (Win32)
00096         {
00097                 private import std.c.windows.windows;
00098 
00099                 /***********************************************************************
00100                         
00101                         List the set of root devices (C:, D: etc)
00102 
00103                         @todo not currently implemented.
00104 
00105                 ***********************************************************************/
00106 
00107                 static char[][] listRoots ()
00108                 {
00109                         assert(0);
00110                         return null;
00111                 }
00112 
00113                 /***********************************************************************
00114 
00115                         Set the current working directory
00116 
00117                 ***********************************************************************/
00118 
00119                 static void setDirectory (FilePath fp)
00120                 {
00121                         if (! SetCurrentDirectoryW (fp.toUtf16))
00122                               throw new IOException ("Failed to set current directory");
00123                 }
00124 
00125                 /***********************************************************************
00126 
00127                         Get the current working directory
00128                 
00129                 ***********************************************************************/
00130 
00131                 static FilePath getDirectory ()
00132                 {
00133                         wchar[] dir;
00134                         int     length;
00135 
00136                         length = GetCurrentDirectoryW (0, null);
00137                         if (length)
00138                            {
00139                            dir = new wchar [length];
00140                            GetCurrentDirectoryW (length, dir);
00141                            return new FilePath (Utf8.encode (dir));
00142                            }
00143                         throw new IOException ("Failed to get current directory");
00144                 }
00145         }
00146         
00147         
00148         version (Posix)
00149         {
00150                 private import std.c.linux.linux;
00151 
00152                 /***********************************************************************
00153 
00154                         List the set of root devices.
00155 
00156                         @todo not currently implemented.
00157 
00158                 ***********************************************************************/
00159 
00160                 static char[][] listRoots ()
00161                 {
00162                         assert(0);
00163                         return null;
00164                 }
00165 
00166                 /***********************************************************************
00167 
00168                         Set the current working directory
00169 
00170                 ***********************************************************************/
00171 
00172                 static void setDirectory (FilePath fp)
00173                 {
00174                         if (std.c.linux.linux.chdir (fp.toUtf8))
00175                             throw new IOException ("Failed to set current directory");
00176                 }
00177 
00178                 /***********************************************************************
00179 
00180                         Get the current working directory
00181                 
00182                 ***********************************************************************/
00183 
00184                 static FilePath getDirectory ()
00185                 {
00186                         char *s = std.c.linux.linux.getcwd (null, 0);
00187                         if (s) 
00188                             // dup the string so we can hang onto it                            
00189                             return new FilePath (s[0..strlen(s)].dup);
00190 
00191                         throw new IOException ("Failed to get current directory");
00192                 }
00193         }            
00194 }

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