source: trunk/src/kernel32/oslibdos.cpp@ 998

/* $Id: oslibdos.cpp,v 1.4 1999-09-21 11:00:22 phaller Exp $ */

/*
 * Wrappers for OS/2 Dos* API
 *
 * Copyright 1998 Sander van Leeuwen (sandervl@xs4all.nl)
 *
 *
 * Project Odin Software License can be found in LICENSE.TXT
 *
 */
#define INCL_BASE
#define INCL_DOSEXCEPTIONS
#define INCL_DOSMEMMGR
#define INCL_DOSPROCESS
#include <os2wrap.h>                     //Odin32 OS/2 api wrappers
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <win32type.h>
#include <misc.h>
#include "initterm.h"
#include "oslibdos.h"

APIRET APIENTRY DosAliasMem(PVOID pb, ULONG cb, PPVOID ppbAlias, ULONG fl);

//******************************************************************************
//******************************************************************************
DWORD OSLibDosAliasMem(LPVOID pb, ULONG cb, LPVOID *ppbAlias, ULONG fl)
{
  return DosAliasMem(pb, cb, ppbAlias, fl);
}
//******************************************************************************
//******************************************************************************
DWORD OSLibDosAllocMem(LPVOID *lplpMemAddr, DWORD size, DWORD flags)
{
  return DosAllocMem(lplpMemAddr, size, flags | flAllocMem);
}
//******************************************************************************
//******************************************************************************
DWORD OSLibDosFreeMem(LPVOID lpMemAddr)
{
  return DosFreeMem(lpMemAddr);
}
//******************************************************************************
//******************************************************************************
DWORD OSLibDosQueryMem(LPVOID lpMemAddr, DWORD *lpRangeSize, DWORD *lpAttr)
{
  return DosQueryMem(lpMemAddr, lpRangeSize, lpAttr);
}
//******************************************************************************
//******************************************************************************
DWORD OSLibDosSetMem(LPVOID lpMemAddr, DWORD size, DWORD flags)
{
 APIRET rc;

  rc = DosSetMem(lpMemAddr, size, flags);
  switch(rc) {
        case ERROR_INVALID_ADDRESS:
                return OSLIB_ERROR_INVALID_ADDRESS;
        case ERROR_ACCESS_DENIED:
                return OSLIB_ERROR_ACCESS_DENIED;
        default:
                return rc;
  }
}
//******************************************************************************
//******************************************************************************
DWORD OSLibDosOpen(char *lpszFileName, DWORD flags)
{
 APIRET rc;
 HFILE  hFile;
 ULONG  ulAction;
 DWORD  os2flags = OPEN_FLAGS_NOINHERIT;


  if(flags & OSLIB_ACCESS_READONLY)
        os2flags |= OPEN_ACCESS_READONLY;
  else
  if(flags & OSLIB_ACCESS_READWRITE)
        os2flags |= OPEN_ACCESS_READWRITE;

  if(flags & OSLIB_ACCESS_SHAREDENYNONE)
        os2flags |= OPEN_SHARE_DENYNONE;
  else
  if(flags & OSLIB_ACCESS_SHAREDENYREAD)
        os2flags |= OPEN_SHARE_DENYREAD;
  else
  if(flags & OSLIB_ACCESS_SHAREDENYWRITE)
        os2flags |= OPEN_SHARE_DENYWRITE;

  rc = DosOpen(lpszFileName,                     /* File path name */
               &hFile,                   /* File handle */
               &ulAction,                      /* Action taken */
               0L,                             /* File primary allocation */
               0L,                     /* File attribute */
               OPEN_ACTION_FAIL_IF_NEW |
               OPEN_ACTION_OPEN_IF_EXISTS,     /* Open function type */
               os2flags,
               0L);                            /* No extended attribute */

  if(rc) {
        return 0;
  }
  else  return hFile;
}
//******************************************************************************
//******************************************************************************
DWORD OSLibDosClose(DWORD hFile)
{
  return DosClose(hFile);
}
//******************************************************************************
//******************************************************************************
DWORD OSLibDosGetFileSize(DWORD hFile)
{
 ULONG  ulLocal, filesize = 0;

  DosSetFilePtr(hFile, 0L, FILE_BEGIN, &ulLocal);
  DosSetFilePtr(hFile, 0L, FILE_END, &filesize);
  DosSetFilePtr(hFile, 0L, FILE_BEGIN, &ulLocal);
  return filesize;
}
//******************************************************************************
//******************************************************************************
DWORD OSLibDosRead(DWORD hFile, LPVOID lpBuffer, DWORD size, DWORD *nrBytesRead)
{
  return DosRead(hFile, lpBuffer, size, nrBytesRead);
}
//******************************************************************************
//******************************************************************************
DWORD OSLibDosWrite(DWORD hFile, LPVOID lpBuffer, DWORD size, DWORD *nrBytesWritten)
{
  return DosWrite(hFile, lpBuffer, size, nrBytesWritten);
}
//******************************************************************************
//******************************************************************************
DWORD OSLibDosSetFilePtr(DWORD hFile, DWORD offset, DWORD method)
{
 DWORD  os2method;
 DWORD  newoffset;
 APIRET rc;

  switch(method) {
  case OSLIB_SETPTR_FILE_CURRENT:
        os2method = FILE_CURRENT;
        break;
  case OSLIB_SETPTR_FILE_BEGIN:
        os2method = FILE_BEGIN  ;
        break;
  case OSLIB_SETPTR_FILE_END:
        os2method = FILE_END;
        break;
  default:
        return OSLIB_ERROR_INVALID_PARAMETER;
  }
  rc = DosSetFilePtr(hFile, offset, os2method, &newoffset);
  if(rc) {
        return -1;
  }
  else  return newoffset;
}
//******************************************************************************
//******************************************************************************
//@@@PH Note: this routine is nothing but a QUICK'N'DIRTY HACK!
//@@@PH       this function should be implemented accordingly to NTDLL's
//            RtlSecondsSince1980ToTime
//            RtlTimeToSecondsSince1980
static void iFDATEFTIME2FILETIME(FDATE fdOS2, FTIME ftOS2, LPFILETIME pftWin32)
{
  float f;
  #define facSECOND 2                // as encoded in OS/2
  #define facMINUTE 60
  #define facHOUR   3600
  #define facDAY    86400
  #define facMONTH  facDAY * 30      // cough, cough :)
  #define facYEAR   facDAY * 365

  /* pftWin32 is 100ns based from 01.01.1601 00:00:00 */
  f =   (fdOS2.year  +  379) * facYEAR        // 1980 - 1601
      + (fdOS2.month - 0   ) * facMONTH
      + (fdOS2.day   - 1   ) * facDAY
      + (ftOS2.hours       ) * facHOUR
      + (ftOS2.minutes     ) * facMINUTE
      + (ftOS2.twosecs     ) * facSECOND;

  f *= 10000; // convert to 100ns base
  pftWin32->dwHighDateTime = (f / (float)(0xffffffff) );
  pftWin32->dwLowDateTime  = (f - (float)((float)pftWin32->dwHighDateTime *
                                          (float)0xffffffff) );
}

BOOL OSLibDosGetFileAttributesEx(PSZ   pszName,
                                 ULONG ulDummy,
                                 PVOID pBuffer)
{
  APIRET      rc;                                         /* API return code */
  FILESTATUS3 fs3;                             /* file information structure */
  LPWIN32_FILE_ATTRIBUTE_DATA lpFad = (LPWIN32_FILE_ATTRIBUTE_DATA) pBuffer;

  // Note: we only handle standard "GetFileExInfoStandard" requests
  rc = DosQueryPathInfo(pszName,               /* query the file information */
                        FIL_STANDARD,
                        &fs3,
                        sizeof(fs3));
  if (rc != NO_ERROR)                                    /* check for errors */
    return FALSE;                                   /* raise error condition */

  // convert structure
  lpFad->dwFileAttributes = fs3.attrFile; // directly interchangeable
  iFDATEFTIME2FILETIME(fs3.fdateCreation,   fs3.ftimeCreation,   &lpFad->ftCreationTime);
  iFDATEFTIME2FILETIME(fs3.fdateLastAccess, fs3.ftimeLastAccess, &lpFad->ftLastAccessTime);
  iFDATEFTIME2FILETIME(fs3.fdateLastWrite,  fs3.ftimeLastWrite,  &lpFad->ftLastWriteTime);

  /* @@@PH we might add Aurora support ...
  lpFad->nFileSizeHigh    = info.nFileSizeHigh;
  */
  lpFad->nFileSizeHigh    = 0;
  lpFad->nFileSizeLow     = fs3.cbFile;

  return TRUE;
}