reactos/dll/win32/kernel32/client/file/lfile.c

   1 /* $Id: lfile.c 48475 2010-08-07 05:02:58Z sir_richard $
   2  *
   3  * COPYRIGHT:       See COPYING in the top level directory
   4  * PROJECT:         ReactOS system libraries
   5  * FILE:            lib/kernel32/file/lfile.c
   6  * PURPOSE:         Find functions
   7  * PROGRAMMER:      Ariadne ( ariadne@xs4all.nl)
   8  * UPDATE HISTORY:
   9  *                  Created 01/11/98
  10  */
  11
  12 #include <k32.h>
  13 #define NDEBUG
  14 #include <debug.h>
  15
  16 /*
  17  * @implemented
  18  */
  19 long
  20 WINAPI
  21 _hread(HFILE hFile, LPVOID lpBuffer, long lBytes)
  22 {
  23     DWORD NumberOfBytesRead;
  24
  25     if (!ReadFile(LongToHandle(hFile),
  26                   lpBuffer,
  27                   (DWORD) lBytes,
  28                   &NumberOfBytesRead,
  29                   NULL))
  30     {
  31         return HFILE_ERROR;
  32     }
  33     return NumberOfBytesRead;
  34 }
  35
  36
  37 /*
  38  * @implemented
  39  */
  40 long
  41 WINAPI
  42 _hwrite(HFILE hFile, LPCSTR lpBuffer, long lBytes)
  43 {
  44     DWORD NumberOfBytesWritten;
  45
  46     if (lBytes == 0)
  47     {
  48         if (!SetEndOfFile((HANDLE) hFile))
  49         {
  50             return HFILE_ERROR;
  51         }
  52         return 0;
  53     }
  54     if (!WriteFile(LongToHandle(hFile),
  55                    (LPVOID) lpBuffer,
  56                    (DWORD) lBytes,
  57                    &NumberOfBytesWritten,
  58                    NULL))
  59     {
  60         return HFILE_ERROR;
  61     }
  62     return NumberOfBytesWritten;
  63 }
  64
  65
  66 /*
  67  * @implemented
  68  */
  69 HFILE
  70 WINAPI
  71 _lopen(LPCSTR lpPathName, int iReadWrite)
  72 {
  73     DWORD dwAccess, dwSharing, dwCreation;
  74
  75     if (iReadWrite & OF_CREATE)
  76     {
  77         dwCreation = CREATE_ALWAYS;
  78         dwAccess = GENERIC_READ | GENERIC_WRITE;
  79     }
  80     else
  81     {
  82         dwCreation = OPEN_EXISTING;
  83         switch(iReadWrite & 0x03)
  84         {
  85             case OF_READ:      dwAccess = GENERIC_READ; break;
  86             case OF_WRITE:     dwAccess = GENERIC_WRITE; break;
  87             case OF_READWRITE: dwAccess = GENERIC_READ | GENERIC_WRITE; break;
  88             default:           dwAccess = 0; break;
  89         }
  90     }
  91
  92     switch(iReadWrite & 0x70)
  93     {
  94         case OF_SHARE_EXCLUSIVE:  dwSharing = 0; break;
  95         case OF_SHARE_DENY_WRITE: dwSharing = FILE_SHARE_READ; break;
  96         case OF_SHARE_DENY_READ:  dwSharing = FILE_SHARE_WRITE; break;
  97         case OF_SHARE_DENY_NONE:
  98         case OF_SHARE_COMPAT:
  99         default:                  dwSharing = FILE_SHARE_READ | FILE_SHARE_WRITE; break;
 100     }
 101
 102     return (HFILE) CreateFileA(lpPathName,
 103                                dwAccess,
 104                                dwSharing,
 105                                NULL,
 106                                dwCreation,
 107                                FILE_ATTRIBUTE_NORMAL,
 108                                NULL);
 109 }
 110
 111
 112 /*
 113  * @implemented
 114  */
 115 HFILE
 116 WINAPI
 117 _lcreat(LPCSTR lpPathName, int iAttribute)
 118 {
 119     HANDLE hFile;
 120
 121     iAttribute &= FILE_ATTRIBUTE_READONLY | FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_SYSTEM;
 122     hFile = CreateFileA(lpPathName,
 123                         GENERIC_READ | GENERIC_WRITE,
 124                         (FILE_SHARE_READ | FILE_SHARE_WRITE),
 125                         NULL,
 126                         CREATE_ALWAYS,
 127                         iAttribute,
 128                         NULL);
 129
 130     return HandleToLong(hFile);
 131 }
 132
 133
 134 /*
 135  * @implemented
 136  */
 137 int
 138 WINAPI
 139 _lclose(HFILE hFile)
 140 {
 141     return CloseHandle(LongToHandle(hFile)) ? 0 : HFILE_ERROR;
 142 }
 143
 144
 145 /*
 146  * @implemented
 147  */
 148 LONG
 149 WINAPI
 150 _llseek(HFILE hFile, LONG lOffset, int iOrigin)
 151 {
 152     return SetFilePointer(LongToHandle(hFile),
 153                           lOffset,
 154                           NULL,
 155                           (DWORD) iOrigin);
 156 }
 157
 158 /* EOF */