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 wxOpen(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     }
  53     else if ((oflag & (O_RDONLY | O_WRONLY | O_RDWR)) == O_RDWR)
  54     {
  55         access = GENERIC_READ|GENERIC_WRITE;
  56     }
  57     if (oflag & O_APPEND)
  58     {
  59         if ( wxFile::Exists(filename) )
  60         {
  61             access |= GENERIC_WRITE;
  62             shareMode = FILE_SHARE_READ;
  63             disposition = OPEN_EXISTING;
  64         }
  65         //else: fall through as write_append is the same as write if the
  66         //      file doesn't exist
  67         else
  68             oflag |= O_TRUNC;
  69     }
  70     if (oflag & O_TRUNC)
  71     {
  72         access |= GENERIC_WRITE;
  73         shareMode = 0;
  74         disposition = (oflag & O_CREAT) ? CREATE_ALWAYS : TRUNCATE_EXISTING;
  75     }
  76     else if (oflag & O_CREAT)
  77     {
  78         access |= GENERIC_WRITE;
  79         shareMode = 0;
  80         disposition = CREATE_NEW;
  81     }
  82     else if (oflag & O_EXCL)
  83     {
  84         access |= GENERIC_WRITE;
  85         shareMode = 0;
  86         disposition = TRUNCATE_EXISTING;
  87     }
  88
  89     int fd = 0;
  90     HANDLE fileHandle = ::CreateFile(filename, access, shareMode, NULL,
  91         disposition, FILE_ATTRIBUTE_NORMAL, 0);
  92     if (fileHandle == INVALID_HANDLE_VALUE)
  93         fd = -1;
  94     else
  95         fd = (int) fileHandle;
  96
  97     return fd;
  98 }
  99
 100 int wxAccess(const wxChar *name, int WXUNUSED(how))
 101 {
 102     HANDLE fileHandle = ::CreateFile(name, 0, FILE_SHARE_DELETE | FILE_SHARE_READ | FILE_SHARE_WRITE, NULL,
 103         OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0);
 104
 105     if (fileHandle == INVALID_HANDLE_VALUE)
 106         return -1;
 107
 108     CloseHandle(fileHandle);
 109
 110     return 0;
 111 }
 112
 113 int wxClose(int fd)
 114 {
 115     if (CloseHandle((HANDLE)fd))
 116         return 0;
 117     return -1;
 118 }
 119
 120 int wxEof(int fd)
 121 {
 122     LONG high0 = 0;
 123     DWORD off0 = SetFilePointer((HANDLE) fd, 0, &high0, FILE_CURRENT);
 124     if (off0 == 0xFFFFFFFF && GetLastError() != NO_ERROR)
 125         return -1;
 126
 127     LONG high1 = 0;
 128     DWORD off1 = SetFilePointer((HANDLE) fd, 0, &high0, FILE_END);
 129     if (off1 == 0xFFFFFFFF && GetLastError() != NO_ERROR)
 130         return -1;
 131
 132     if (off0 == off1 && high0 == high1)
 133         return 1;
 134     else
 135     {
 136         SetFilePointer((HANDLE) fd, off0, &high0, FILE_BEGIN);
 137         return 0;
 138     }
 139 }
 140
 141 int wxRead(int fd, void *buf, unsigned int count)
 142 {
 143     DWORD bytesRead = 0;
 144
 145     if (ReadFile((HANDLE) fd, buf, (DWORD) count, &bytesRead, NULL))
 146         return bytesRead;
 147     else
 148         return -1;
 149 }
 150
 151 int wxWrite(int fd, const void *buf, unsigned int count)
 152 {
 153     DWORD bytesWritten = 0;
 154
 155     if (WriteFile((HANDLE) fd, buf, (DWORD) count, &bytesWritten, NULL))
 156         return bytesWritten;
 157     else
 158         return -1;
 159 }
 160
 161 __int64 wxSeek(int fd, __int64 offset, int origin)
 162 {
 163     int method;
 164     switch ( origin ) {
 165         default:
 166             wxFAIL_MSG(_("unknown seek origin"));
 167
 168         case SEEK_SET:
 169             method = FILE_BEGIN;
 170             break;
 171
 172         case SEEK_CUR:
 173             method = FILE_CURRENT;
 174             break;
 175
 176         case SEEK_END:
 177             method = FILE_END;
 178             break;
 179     }
 180
 181     LONG high = 0;
 182     DWORD res = SetFilePointer((HANDLE) fd, offset, &high, 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     LONG high = 0;
 195     DWORD res = SetFilePointer((HANDLE) fd, 0, &high, FILE_CURRENT) ;
 196     if (res == 0xFFFFFFFF && GetLastError() != NO_ERROR)
 197     {
 198         wxLogSysError(_("can't get seek position on file descriptor %d"), fd);
 199         return wxInvalidOffset;
 200     }
 201     else
 202         return res + (((__int64)high) << 32);
 203 }
 204
 205 int wxFsync(int WXUNUSED(fd))
 206 {
 207     return 0;
 208 }
 209
 210 #endif //__WXWINCE__