src/msw/wince/filefnwce.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        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 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  21     #pragma implementation "filefn.h"
  22 #endif
  23
  24 // For compilers that support precompilation, includes "wx.h".
  25 #include "wx/wxprec.h"
  26 #include "wx/defs.h"
  27 #include "wx/file.h"
  28
  29 #ifdef __BORLANDC__
  30     #pragma hdrstop
  31 #endif
  32
  33 #include <ctype.h>
  34 #include <stdio.h>
  35 #include <stdlib.h>
  36 #include <string.h>
  37
  38 #ifdef __WXWINCE__
  39 #include "wx/msw/wince/missing.h"
  40
  41 int wxOpen(const wxChar *filename, int oflag, int WXUNUSED(pmode))
  42 {
  43     DWORD access = 0;
  44     DWORD shareMode = 0;
  45     DWORD disposition = 0;
  46
  47     if ((oflag & (O_RDONLY | O_WRONLY | O_RDWR)) == O_RDONLY)
  48     {
  49         access = GENERIC_READ;
  50         shareMode = FILE_SHARE_READ|FILE_SHARE_WRITE;
  51         disposition |= OPEN_EXISTING;
  52     }
  53     else if ((oflag & (O_RDONLY | O_WRONLY | O_RDWR)) == O_WRONLY)
  54     {
  55         access = GENERIC_WRITE;
  56     }
  57     else if ((oflag & (O_RDONLY | O_WRONLY | O_RDWR)) == O_RDWR)
  58     {
  59         access = GENERIC_READ|GENERIC_WRITE;
  60     }
  61     if (oflag & O_APPEND)
  62     {
  63         if ( wxFile::Exists(filename) )
  64         {
  65             access |= GENERIC_WRITE;
  66             shareMode = FILE_SHARE_READ;
  67             disposition = OPEN_EXISTING;
  68         }
  69         //else: fall through as write_append is the same as write if the
  70         //      file doesn't exist
  71         else
  72             oflag |= O_TRUNC;
  73     }
  74     if (oflag & O_TRUNC)
  75     {
  76         access |= GENERIC_WRITE;
  77         shareMode = 0;
  78         disposition = (oflag & O_CREAT) ? CREATE_ALWAYS : TRUNCATE_EXISTING;
  79     }
  80     else if (oflag & O_CREAT)
  81     {
  82         access |= GENERIC_WRITE;
  83         shareMode = 0;
  84         disposition = CREATE_NEW;
  85     }
  86     else if (oflag & O_EXCL)
  87     {
  88         access |= GENERIC_WRITE;
  89         shareMode = 0;
  90         disposition = TRUNCATE_EXISTING;
  91     }
  92
  93     int fd = 0;
  94     HANDLE fileHandle = ::CreateFile(filename, access, shareMode, NULL,
  95         disposition, FILE_ATTRIBUTE_NORMAL, 0);
  96     if (fileHandle == INVALID_HANDLE_VALUE)
  97         fd = -1;
  98     else
  99         fd = (int) fileHandle;
 100
 101     return fd;
 102 }
 103
 104 int wxAccess(const wxChar *name, int WXUNUSED(how))
 105 {
 106     HANDLE fileHandle = ::CreateFile(name, 0, FILE_SHARE_DELETE | FILE_SHARE_READ | FILE_SHARE_WRITE, NULL,
 107         OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0);
 108
 109     if (fileHandle == INVALID_HANDLE_VALUE)
 110         return -1;
 111
 112     CloseHandle(fileHandle);
 113
 114     return 0;
 115 }
 116
 117 int wxClose(int fd)
 118 {
 119     if (CloseHandle((HANDLE)fd))
 120         return 0;
 121     return -1;
 122 }
 123
 124 int wxEof(int fd)
 125 {
 126     LONG high0 = 0;
 127     DWORD off0 = SetFilePointer((HANDLE) fd, 0, &high0, FILE_CURRENT);
 128     if (off0 == 0xFFFFFFFF && GetLastError() != NO_ERROR)
 129         return -1;
 130
 131     LONG high1 = 0;
 132     DWORD off1 = SetFilePointer((HANDLE) fd, 0, &high0, FILE_END);
 133     if (off1 == 0xFFFFFFFF && GetLastError() != NO_ERROR)
 134         return -1;
 135
 136     if (off0 == off1 && high0 == high1)
 137         return 1;
 138     else
 139     {
 140         SetFilePointer((HANDLE) fd, off0, &high0, FILE_BEGIN);
 141         return 0;
 142     }
 143 }
 144
 145 int wxRead(int fd, void *buf, unsigned int count)
 146 {
 147     DWORD bytesRead = 0;
 148
 149     if (ReadFile((HANDLE) fd, buf, (DWORD) count, &bytesRead, NULL))
 150         return bytesRead;
 151     else
 152         return -1;
 153 }
 154
 155 int wxWrite(int fd, const void *buf, unsigned int count)
 156 {
 157     DWORD bytesWritten = 0;
 158
 159     if (WriteFile((HANDLE) fd, buf, (DWORD) count, &bytesWritten, NULL))
 160         return bytesWritten;
 161     else
 162         return -1;
 163 }
 164
 165 __int64 wxSeek(int fd, __int64 offset, int origin)
 166 {
 167     int method;
 168     switch ( origin ) {
 169         default:
 170             wxFAIL_MSG(_("unknown seek origin"));
 171
 172         case SEEK_SET:
 173             method = FILE_BEGIN;
 174             break;
 175
 176         case SEEK_CUR:
 177             method = FILE_CURRENT;
 178             break;
 179
 180         case SEEK_END:
 181             method = FILE_END;
 182             break;
 183     }
 184
 185     LONG high = 0;
 186     DWORD res = SetFilePointer((HANDLE) fd, offset, &high, method) ;
 187     if (res == 0xFFFFFFFF && GetLastError() != NO_ERROR)
 188     {
 189         wxLogSysError(_("can't seek on file descriptor %d"), fd);
 190         return wxInvalidOffset;
 191     }
 192     else
 193         return (off_t)res;
 194 }
 195
 196 __int64 wxTell(int fd)
 197 {
 198     LONG high = 0;
 199     DWORD res = SetFilePointer((HANDLE) fd, 0, &high, FILE_CURRENT) ;
 200     if (res == 0xFFFFFFFF && GetLastError() != NO_ERROR)
 201     {
 202         wxLogSysError(_("can't get seek position on file descriptor %d"), fd);
 203         return wxInvalidOffset;
 204     }
 205     else
 206         return res + (((__int64)high) << 32);
 207 }
 208
 209 int wxFsync(int WXUNUSED(fd))
 210 {
 211     return 0;
 212 }
 213
 214 #endif //__WXWINCE__