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/*
* open.c: open, _open and_wopen implementations for WinCE.
*
* This file has no copyright assigned and is placed in the Public Domain.
* This file is a part of the mingw-runtime package.
* No warranty is given; refer to the file DISCLAIMER within the package.
*
* Written by Pedro Alves <pedro_alves@portugalmail.pt> Feb 2007
*
*/
#include <windows.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/stat.h>
static int
vwopen (const wchar_t *wpath, int oflag, va_list ap)
{
DWORD fileaccess;
DWORD fileshare;
DWORD filecreate;
DWORD fileattrib;
HANDLE hnd;
switch (oflag & (O_RDONLY | O_WRONLY | O_RDWR))
{
case O_RDONLY:
fileaccess = GENERIC_READ;
break;
case O_WRONLY:
fileaccess = GENERIC_WRITE;
break;
case O_RDWR:
fileaccess = GENERIC_READ | GENERIC_WRITE;
break;
default:
return -1;
}
switch (oflag & (O_CREAT | O_EXCL | O_TRUNC))
{
case 0:
case O_EXCL: /* ignore EXCL w/o CREAT */
filecreate = OPEN_EXISTING;
break;
case O_CREAT:
filecreate = OPEN_ALWAYS;
break;
case O_CREAT | O_EXCL:
case O_CREAT | O_TRUNC | O_EXCL:
filecreate = CREATE_NEW;
break;
case O_TRUNC:
case O_TRUNC | O_EXCL: /* ignore EXCL w/o CREAT */
filecreate = TRUNCATE_EXISTING;
break;
case O_CREAT | O_TRUNC:
filecreate = CREATE_ALWAYS;
break;
default:
/* this can't happen ... all cases are covered */
return -1;
}
fileshare = 0;
if (oflag & O_CREAT)
{
int pmode = va_arg (ap, int);
if ((pmode & S_IREAD) == S_IREAD)
fileshare |= FILE_SHARE_READ;
if ((pmode & S_IWRITE) == S_IWRITE)
fileshare |= FILE_SHARE_WRITE;
}
fileattrib = FILE_ATTRIBUTE_NORMAL;
hnd = CreateFileW (wpath, fileaccess, fileshare, NULL, filecreate,
fileattrib, NULL);
if (hnd == INVALID_HANDLE_VALUE)
return -1;
if (oflag & O_APPEND)
SetFilePointer (hnd, 0, NULL, FILE_END);
return (int) hnd;
}
static int
vopen (const char *path, int oflag, va_list ap)
{
wchar_t wpath[MAX_PATH];
size_t path_len = strlen (path);
if (path_len >= MAX_PATH)
return -1;
mbstowcs (wpath, path, path_len + 1);
return vwopen (wpath, oflag, ap);
}
int
_open (const char *path, int oflag, ...)
{
va_list ap;
int ret;
va_start (ap, oflag);
ret = vopen (path, oflag, ap);
va_end (ap);
return ret;
}
int
open (const char *path, int oflag, ...)
{
va_list ap;
int ret;
va_start (ap, oflag);
ret = vopen (path, oflag, ap);
va_end (ap);
return ret;
}
int
_wopen (const wchar_t *path, int oflag, ...)
{
va_list ap;
int ret;
va_start (ap, oflag);
ret = vwopen (path, oflag, ap);
va_end (ap);
return ret;
}
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