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

158 lines
3.4 KiB
C

/*
* COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS system libraries
* FILE: dll/win32/kernel32/client/file/lfile.c
* PURPOSE: Find functions
* PROGRAMMER: Ariadne ( ariadne@xs4all.nl)
* UPDATE HISTORY:
* Created 01/11/98
*/
#include <k32.h>
#define NDEBUG
#include <debug.h>
/*
* @implemented
*/
long
WINAPI
_hread(HFILE hFile, LPVOID lpBuffer, long lBytes)
{
DWORD NumberOfBytesRead;
if (!ReadFile(LongToHandle(hFile),
lpBuffer,
(DWORD) lBytes,
&NumberOfBytesRead,
NULL))
{
return HFILE_ERROR;
}
return NumberOfBytesRead;
}
/*
* @implemented
*/
long
WINAPI
_hwrite(HFILE hFile, LPCSTR lpBuffer, long lBytes)
{
DWORD NumberOfBytesWritten;
if (lBytes == 0)
{
if (!SetEndOfFile((HANDLE) hFile))
{
return HFILE_ERROR;
}
return 0;
}
if (!WriteFile(LongToHandle(hFile),
(LPVOID) lpBuffer,
(DWORD) lBytes,
&NumberOfBytesWritten,
NULL))
{
return HFILE_ERROR;
}
return NumberOfBytesWritten;
}
/*
* @implemented
*/
HFILE
WINAPI
_lopen(LPCSTR lpPathName, int iReadWrite)
{
DWORD dwAccess, dwSharing, dwCreation;
if (iReadWrite & OF_CREATE)
{
dwCreation = CREATE_ALWAYS;
dwAccess = GENERIC_READ | GENERIC_WRITE;
}
else
{
dwCreation = OPEN_EXISTING;
switch(iReadWrite & 0x03)
{
case OF_READ: dwAccess = GENERIC_READ; break;
case OF_WRITE: dwAccess = GENERIC_WRITE; break;
case OF_READWRITE: dwAccess = GENERIC_READ | GENERIC_WRITE; break;
default: dwAccess = 0; break;
}
}
switch(iReadWrite & 0x70)
{
case OF_SHARE_EXCLUSIVE: dwSharing = 0; break;
case OF_SHARE_DENY_WRITE: dwSharing = FILE_SHARE_READ; break;
case OF_SHARE_DENY_READ: dwSharing = FILE_SHARE_WRITE; break;
case OF_SHARE_DENY_NONE:
case OF_SHARE_COMPAT:
default: dwSharing = FILE_SHARE_READ | FILE_SHARE_WRITE; break;
}
return (HFILE) CreateFileA(lpPathName,
dwAccess,
dwSharing,
NULL,
dwCreation,
FILE_ATTRIBUTE_NORMAL,
NULL);
}
/*
* @implemented
*/
HFILE
WINAPI
_lcreat(LPCSTR lpPathName, int iAttribute)
{
HANDLE hFile;
iAttribute &= FILE_ATTRIBUTE_READONLY | FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_SYSTEM;
hFile = CreateFileA(lpPathName,
GENERIC_READ | GENERIC_WRITE,
(FILE_SHARE_READ | FILE_SHARE_WRITE),
NULL,
CREATE_ALWAYS,
iAttribute,
NULL);
return HandleToLong(hFile);
}
/*
* @implemented
*/
int
WINAPI
_lclose(HFILE hFile)
{
return CloseHandle(LongToHandle(hFile)) ? 0 : HFILE_ERROR;
}
/*
* @implemented
*/
LONG
WINAPI
_llseek(HFILE hFile, LONG lOffset, int iOrigin)
{
return SetFilePointer(LongToHandle(hFile),
lOffset,
NULL,
(DWORD) iOrigin);
}
/* EOF */