src/msw/wince/filefnwce.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/msw/wince/filefn.cpp
   3 // Purpose:     File- and directory-related functions
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     29/01/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 1998 Julian Smart
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 // For compilers that support precompilation, includes "wx.h".
  21 #include "wx/wxprec.h"
  22
  23 #ifdef __BORLANDC__
  24     #pragma hdrstop
  25 #endif
  26
  27 #include "wx/file.h"
  28
  29 #include <ctype.h>
  30 #include <stdio.h>
  31 #include <stdlib.h>
  32 #include <string.h>
  33
  34 #ifdef __WXWINCE__
  35 #include "wx/msw/wince/missing.h"
  36
  37 int wxCRT_Open(const wxChar *filename, int oflag, int WXUNUSED(pmode))
  38 {
  39     DWORD access = 0;
  40     DWORD shareMode = 0;
  41     DWORD disposition = 0;
  42
  43     if ((oflag & (O_RDONLY | O_WRONLY | O_RDWR)) == O_RDONLY)
  44     {
  45         access = GENERIC_READ;
  46         shareMode = FILE_SHARE_READ|FILE_SHARE_WRITE;
  47         disposition = OPEN_EXISTING;
  48     }
  49     else if ((oflag & (O_RDONLY | O_WRONLY | O_RDWR)) == O_WRONLY)
  50     {
  51         access = GENERIC_WRITE;
  52         disposition = OPEN_ALWAYS;
  53     }
  54     else if ((oflag & (O_RDONLY | O_WRONLY | O_RDWR)) == O_RDWR)
  55     {
  56         access = GENERIC_READ|GENERIC_WRITE;
  57         disposition = OPEN_ALWAYS;
  58     }
  59
  60     if (oflag & O_APPEND)
  61     {
  62         if ( wxFile::Exists(filename) )
  63         {
  64             access |= GENERIC_WRITE;
  65             shareMode = FILE_SHARE_READ;
  66             disposition = OPEN_EXISTING;
  67         }
  68         else
  69         {
  70             oflag |= O_TRUNC;
  71         }
  72     }
  73     if (oflag & O_TRUNC)
  74     {
  75         access |= GENERIC_WRITE;
  76         shareMode = 0;
  77         disposition = oflag & O_CREAT ? CREATE_ALWAYS : TRUNCATE_EXISTING;
  78     }
  79     else if (oflag & O_CREAT)
  80     {
  81         access |= GENERIC_WRITE;
  82         shareMode = 0;
  83         disposition = CREATE_NEW;
  84     }
  85     else if (oflag & O_EXCL)
  86     {
  87         access |= GENERIC_WRITE;
  88         shareMode = 0;
  89         disposition = TRUNCATE_EXISTING;
  90     }
  91
  92     int fd = 0;
  93     HANDLE fileHandle = ::CreateFile(filename, access, shareMode, NULL,
  94         disposition, FILE_ATTRIBUTE_NORMAL, 0);
  95     if (fileHandle == INVALID_HANDLE_VALUE)
  96         fd = -1;
  97     else
  98         fd = (int) fileHandle;
  99
 100     return fd;
 101 }
 102
 103 int wxCRT_Access(const wxChar *name, int WXUNUSED(how))
 104 {
 105     HANDLE fileHandle = ::CreateFile(name, 0, FILE_SHARE_DELETE | FILE_SHARE_READ | FILE_SHARE_WRITE, NULL,
 106         OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0);
 107
 108     if (fileHandle == INVALID_HANDLE_VALUE)
 109         return -1;
 110
 111     CloseHandle(fileHandle);
 112
 113     return 0;
 114 }
 115
 116 int wxClose(int fd)
 117 {
 118     if (CloseHandle((HANDLE)fd))
 119         return 0;
 120     return -1;
 121 }
 122
 123 int wxEof(int fd)
 124 {
 125     DWORD off0 = SetFilePointer((HANDLE) fd, 0, NULL, FILE_CURRENT);
 126     if (off0 == 0xFFFFFFFF && GetLastError() != NO_ERROR)
 127         return -1;
 128
 129     DWORD off1 = SetFilePointer((HANDLE) fd, 0, NULL, FILE_END);
 130     if (off1 == 0xFFFFFFFF && GetLastError() != NO_ERROR)
 131         return -1;
 132
 133     if (off0 == off1)
 134         return 1;
 135     else
 136     {
 137         SetFilePointer((HANDLE) fd, off0, NULL, FILE_BEGIN);
 138         return 0;
 139     }
 140 }
 141
 142 int wxRead(int fd, void *buf, unsigned int count)
 143 {
 144     DWORD bytesRead = 0;
 145
 146     if (ReadFile((HANDLE) fd, buf, (DWORD) count, &bytesRead, NULL))
 147         return bytesRead;
 148     else
 149         return -1;
 150 }
 151
 152 int wxWrite(int fd, const void *buf, unsigned int count)
 153 {
 154     DWORD bytesWritten = 0;
 155
 156     if (WriteFile((HANDLE) fd, buf, (DWORD) count, &bytesWritten, NULL))
 157         return bytesWritten;
 158     else
 159         return -1;
 160 }
 161
 162 __int64 wxSeek(int fd, __int64 offset, int origin)
 163 {
 164     int method;
 165     switch ( origin ) {
 166         default:
 167             wxFAIL_MSG(_("unknown seek origin"));
 168
 169         case SEEK_SET:
 170             method = FILE_BEGIN;
 171             break;
 172
 173         case SEEK_CUR:
 174             method = FILE_CURRENT;
 175             break;
 176
 177         case SEEK_END:
 178             method = FILE_END;
 179             break;
 180     }
 181
 182     DWORD res = SetFilePointer((HANDLE) fd, offset, NULL, method) ;
 183     if (res == 0xFFFFFFFF && GetLastError() != NO_ERROR)
 184     {
 185         wxLogSysError(_("can't seek on file descriptor %d"), fd);
 186         return wxInvalidOffset;
 187     }
 188     else
 189         return (off_t)res;
 190 }
 191
 192 __int64 wxTell(int fd)
 193 {
 194     // WinCE apparently doesn't support lpDistanceToMoveHigh.
 195     // LONG high = 0;
 196     DWORD res = SetFilePointer((HANDLE) fd, 0, NULL, FILE_CURRENT) ;
 197     if (res == 0xFFFFFFFF && GetLastError() != NO_ERROR)
 198     {
 199         wxLogSysError(_("can't get seek position on file descriptor %d"), fd);
 200         return wxInvalidOffset;
 201     }
 202     else
 203         return res ; // + (((__int64)high) << 32);
 204 }
 205
 206 int wxFsync(int WXUNUSED(fd))
 207 {
 208     return 0;
 209 }
 210
 211 #endif //__WXWINCE__